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Basler DGC-2020HD Instruction Manual

Digital genset controller
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INSTRUCTION MANUAL
FOR
DGC-2020HD
DIGITAL GENSET CONTROLLER
Configuration
Publication: 9469300995
Apr-19
Revision: D2

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Summary of Contents for Basler DGC-2020HD

  • Page 1 INSTRUCTION MANUAL DGC-2020HD DIGITAL GENSET CONTROLLER Configuration Publication: 9469300995 Apr-19 Revision: D2...
  • Page 2 Proposición 65, estamos notificándole que uno o más productos químicos allí listados pueden estar presentes en los productos que le vendemos. Para obtener más información sobre los productos químicos específicos que este producto contiene, visite https://es.basler.com/Proposición-65. 警告: 加州第65号提案要求对可能含有加州已知的致癌的、导致先天缺陷或其他生殖伤害的化学物质的产品发出...

  • Page 3: Conventions Used In This Manual

    9469300995 Rev D Preface This instruction manual provides information about the configuration of the DGC-2020HD Digital Genset Controller. To accomplish this, the following information is provided: • Device information and security settings • Configuration via BESTCOMSPlus ® and the front panel •...
  • Page 4 The availability and design of all features and options are subject to modification without notice. Over time, improvements and revisions may be made to this publication. Before performing any of the following procedures, contact Basler Electric for the latest revision of this manual.
  • Page 5 For a complete copy of GNU GENERAL PUBLIC LICENSE Version 2, June 1991 or GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 refer to www.gnu.org or contact Basler Electric. You, as a Basler Electric Company customer, agree to abide by the terms and conditions of GNU GENERAL PUBLIC LICENSE Version 2, June 1991 or GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999, and as such...
  • Page 6 9469300995 Rev D Preface DGC-2020HD...

  • Page 7: Table Of Contents

    Splash Screen ............................14 Settings Menu ............................15 BESTCOMSPlus® Software ........................17 System Recommendations ........................18 Installation ............................... 19 Activate the DGC-2020HD Plugin for BESTCOMSPlus® ................ 19 Menu Bars ............................... 23 Settings Explorer ............................. 25 Metering Explorer ............................ 25 BESTspace™ ............................25 Settings File Management ........................
  • Page 8 Parameter Selection ..........................191 Demand Start/Stop ..........................192 Generator Sequencing .......................... 193 Network Configuration ........................... 195 Load Shedding ............................196 Group Start Settings ..........................198 Group Segment Settings ........................199 Block Load Level Settings ........................204 Group Configuration ..........................206 Contents DGC-2020HD...
  • Page 9 Var/PF Controller ........................... 355 Speed Trim Function ..........................355 Tuning Parameters ..........................355 Tuning Procedures ..........................356 Generic Gains for Multiple Machine Types ................... 362 Load Anticipation Tuning Procedure ..................... 363 Exhaust Treatment ..........................369 Diesel Particulate Filter (DPF) ....................... 369 DGC-2020HD Contents...
  • Page 10 Speed Bias ............................382 Load Anticipation ........................... 382 Voltage Bias ............................384 Load Sharing ............................385 Group Start and Group Stop Requests ....................387 DGC-2020HD Front Panel Diagnostics Screens .................. 388 ® BESTCOMSPlus Settings Loader Tool ....................395 Introduction ............................395 Setup ..............................

  • Page 11: Device Information

    The model number, together with the style number, describes the options included in a specific device. The style number of the DGC-2020HD is displayed on the BESTCOMSPlus Style Number screen after downloading settings from the device. When configuring DGC-2020HD settings off-line, the style number for the unit to be configured can be entered into BESTCOMSPlus to enable configuration of the required settings.

  • Page 12: Firmware Updates

    Figure 2. Device Info Screen Firmware Updates Future enhancements to the DGC-2020HD functionality will make a firmware update desirable. Because default settings are loaded when DGC-2020HD firmware is updated, your settings should be saved in a file prior to upgrading firmware. Note...

  • Page 13: Upgrading Firmware In Expansion Modules

    DGC-2020HD. If no expansion module is present, proceed to Upgrading Firmware in the DGC-2020HD. Place the DGC-2020HD in OFF mode. This can be accomplished by clicking the Off button on the Control screen inside the Metering Explorer or by pressing the Off button on the DGC-2020HD front panel.
  • Page 14 After selecting Yes, the DGC-2020HD Selection screen will appear. Select either USB or Ethernet. After file(s) have been uploaded, click the Close button on the Basler Electric Device Package Uploader screen and disconnect communication to the DGC-2020HD. Upgrading Firmware in the DGC-2020HD Upgrade DGC-2020HD firmware and then load a saved settings file.
  • Page 15 General Settings > Style Number in BESTCOMSPlus. If the style number of the settings file does not match that of the DGC-2020HD into which it is to be loaded, disconnect from the DGC-2020HD, then modify the style number in the settings file.
  • Page 16 9469300995 Rev D Device Information DGC-2020HD...

  • Page 17: Security

    9469300995 Rev D Security Multiple levels of DGC-2020HD security give personnel the level of access appropriate for the tasks they routinely perform while securing critical settings from unauthorized access. Access Levels Passwords provide access security for six distinct functional access areas: Read, Control, Operator, Settings, Design, and Administrator (Admin).
  • Page 18 An administrator level is required to upload security settings to the device. Enter the username and password of the administrator and then click the Log In button. The default administrator username is “A” and the default password is “A”. BESTCOMSPlus notifies you when the upload is successful. Security DGC-2020HD...

  • Page 19: Port Access Setup

    If a password is entered incorrectly more than x times (Login Attempts) in y seconds (Login Time Window), then access is prohibited for z seconds (Login Lockout Time). The BESTCOMSPlus Access Control screen is illustrated in Figure 7. Settings are listed in Table 2. DGC-2020HD Security...
  • Page 20 An administrator level is required to upload security to the device. Enter the username and password of the administrator and then click the Log In button. The default administrator username is “A” and the default password is “A”. BESTCOMSPlus notifies you when the upload is successful. Security DGC-2020HD...

  • Page 21: Configuration Through The Front Panel

    Front Panel Navigation Path: Settings > General Settings > Front Panel HMI The DGC-2020HD LCD can be customized to fit the needs of your specific application. Most of the options can be adjusted using the front-panel buttons while all options can be adjusted within BESTCOMSPlus.
  • Page 22 LCD Backlight Timeout When Sleep Mode is enabled, this setting dictates the amount of time that must elapse before the DGC-2020HD enters sleep mode. This setting accepts values from 1 to 120, in increments of 1 minute. Language Selection Front panel text is displayed in the selected language. Select English, French, Spanish, or German.
  • Page 23 Table 3. Settings for Front Panel Settings Screen Locator Setting Range Increment Unit Contrast Value 0 to 100 Invert Display Enabled or Disabled Phase Toggle Delay 0 to 120 seconds Engine Hours Display Enabled or Disabled DGC-2020HD Configuration through the Front Panel...

  • Page 24: Splash Screen

    Front Panel Navigation Path: Not available through front panel A splash screen, which is displayed for a few seconds upon powering up the DGC-2020HD, can be customized. The image must be exactly 480 pixels wide and 272 pixels high. Acceptable image formats are BMP, JPG, GIF, and PNG.

  • Page 25: Settings Menu

    9469300995 Rev D Settings Menu The display structure of the Settings menu on the front panel is provided below. Refer to the Controls and Indicators chapter in the Operation manual for a full description of DGC-2020HD controls and indicators. • General Settings...
  • Page 26 GOV Output LS (Load Share) Output Demand Start/Stop Sequencing Network Configuration Load Shedding • Logic Logic Timers (1-8) Logic Timers (9-16) Logic Timers (17-24) Logic Timers (25-32) Logic Counters Logic Input Counters Broadcast Logic Configuration through the Front Panel DGC-2020HD...

  • Page 27: Bestcomsplus® Software

    DGC-2020HD is brought into BESTCOMSPlus by downloading settings and logic from the DGC-2020HD. This gives the user the option of developing a custom setting file by modifying the default logic scheme or by building a unique scheme from scratch.

  • Page 28: System Recommendations

    BESTCOMSPlus software is built on the Microsoft .NET Framework. The setup utility that installs BESTCOMSPlus on your PC also installs the DGC-2020HD plugin and the required version of .NET ® Framework (if not already installed). BESTCOMSPlus operates with systems using Windows XP 32-bit SP3, Windows Vista 32-bit SP1, Windows 7, Windows 8, and Windows 10.

  • Page 29: Installation

    BESTCOMSPlus. Manual activation is useful if you want to create a settings file prior to receiving your DGC-2020HD. Note that if a DGC-2020HD is not connected, you will not be able to configure certain Ethernet settings. Ethernet settings can be changed only when an active USB or Ethernet connection is present.
  • Page 30 DGC-2020HD. USB driver installation progress is shown in the Windows taskbar area. Windows will notify you when installation is complete. Connect a USB cable between the PC and your DGC-2020HD. Apply control power to the DGC-2020HD. Wait until the boot sequence is complete.
  • Page 31 Manual Activation of the DGC-2020HD Plugin Manual activation of the DGC-2020HD plugin is required only if your initial use of BESTCOMSPlus will be on a PC that is not connected to a DGC-2020HD. Manual activation is described in the following paragraphs.

  • Page 32: Establishing Communication

    Basler Electric website. Click either the Website or Email button. Click the Activate button when you are ready to enter the activation key you received from Basler Electric. The Activate Device Plugin pop-up appears. Refer to Figure 14.

  • Page 33: Menu Bars

    Save settings as a *.csv file Export To File Print Print, export, or send a settings file Properties View properties of a settings file History View history of a settings file Recent Files Open a previously opened file Exit Close BESTCOMSPlus program DGC-2020HD BESTCOMSPlus® Software...
  • Page 34 View general, detailed build, and system information Lower Menu Bar (DGC-2020HD Plugin) The lower menu bar functions are listed and described in Table 7. Table 7. Lower Menu Bar (DGC-2020HD Plugin) Menu Button Description Enables you to show/hide the Metering Panel, Settings Panel, or Settings Info Panel.

  • Page 35: Settings Explorer

    Any number of different workspaces can be saved including a default workspace which loads when the DGC-2020HD plug-in is started. Metering Explorer screens and Settings Explorer screens can be saved independently into the workspace file. A Comments box is provided for writing a description or leaving notes for each saved workspace.

  • Page 36: Settings File Management

    Figure 18. View Menu, BESTspace™, Save Workspace Screen Settings File Management A settings file contains all DGC-2020HD settings, including logic. A settings file assumes a file extension of “∗.bstx”. It is possible to save the logic only as a separate logic library file on the BESTlogicPlus Programmable Logic screen.
  • Page 37 Select the Save button to complete the save. Upload Settings and/or Logic to Device To upload a settings file to the DGC-2020HD, open the file through BESTCOMSPlus or create the file using BESTCOMSPlus. Then pull down the Communication menu and select Upload Settings and Logic to Device.
  • Page 38 BESTCOMSPlus. The settings group selection drop-down menu is at top of screen in lower menu bar. Click Tools > Copy Settings Group and select the group to be the destination of the copied settings. Figure 21. Copy Settings Group BESTCOMSPlus® Software DGC-2020HD...

  • Page 39: Auto Export Metering

    Ongoing DGC-2020HD functionality enhancements may make future DGC-2020HD firmware updates desirable. Enhancements to DGC-2020HD firmware typically coincide with enhancements to the DGC- 2020HD plugin for BESTCOMSPlus. When a DGC-2020HD is updated with the latest version of firmware, the latest version of BESTCOMSPlus should also be obtained.
  • Page 40 9469300995 Rev D BESTCOMSPlus® Software DGC-2020HD...

  • Page 41: Communication

    9469300995 Rev D Communication DGC-2020HD communication ports include a mini-B USB port, two RJ-45 Ethernet jacks or an ST fiber optic port, Controller Area Network (CAN) terminals, RS-232 port, RS-485 terminals, and provisions for an optional Remote Display Panel. The following paragraphs describe the DGC-2020HD communication ports in detail.
  • Page 42 Port screen appears. Settings on this screen differ depending on the Ethernet port style of the connected DGC-2020HD. Figure 23 illustrates the settings provided for dual copper Ethernet ports (style xxxxDxxxx). Figure 24 illustrates the settings for a fiber optic Ethernet port (style xxxxFxxxx).
  • Page 43 192.168.0.0 to 192.168.255.255 If the DGC-2020HD is operating on an isolated network, the Subnet Mask can be left at 0.0.0.0 and the Default Gateway can be chosen as any valid IP address from the same range as the DGC-2020HD IP address.
  • Page 44 In certain network configurations where at least one device is not reachable from either Ethernet link, the ARP Ping Fail pre-alarm is annunciated. For example, another DGC-2020HD on the network is one of the queried IP hosts, but it is removed from the network for maintenance. The querying DGC-2020HD does not receive a reply from the offline DGC-2020HD and determines that both of its Ethernet links have failed, thus disconnecting it from the network completely.

  • Page 45: Establishing Ethernet Communication

    Establishing Ethernet Communication Communication between BESTCOMSPlus and the DGC-2020HD is established by clicking the Connect button on the DGC-2020HD Connection screen, see Figure 26. This screen is found under the Communication pull-down menu, New Connection, DGC-2020HD or by clicking the Connect button located on the lower menu bar.
  • Page 46 9469300995 Rev D Figure 26. DGC-2020HD Connection Screen When communication is established, BESTCOMSPlus reads all settings and logic from the DGC-2020HD and loads them into BESTCOMSPlus memory by default. This feature may be disabled in the Advanced Properties. Advanced Properties Click the Advanced…...

  • Page 47: Can

    Engine Control Units (ECU) and related devices. Applications using an engine-driven generator set controlled by a DGC-2020HD may also have an ECU. The CAN interface allows the ECU and DGC-2020HD to communicate. The ECU reports operating information to the DGC-2020HD through the CAN interface. Operating parameters and diagnostic information, if supported by the ECU, are decoded and displayed for monitoring.
  • Page 48 500 ms 3703 Shutdown from ECU Binary Binary 1110 Switched Battery Voltage (at ECU) Throttle (Accelerator Pedal) Position 50 ms Total Engine Hours hours hours Requested 1.5 s Total Fuel Used liters gallons Requested 1.5 s Transmission Oil Pressure Communication DGC-2020HD...
  • Page 49 ∗ SPN: Suspect Parameter Number Caution When CAN is enabled, the DGC-2020HD ignores the following sender inputs: oil pressure, coolant temperature, and magnetic pickup. Under certain circumstances, the following strings may be displayed on the front panel and in the Metering Explorer of BESTCOMSPlus: •...

  • Page 50: Ecu Limitations

    100 ms ∗ SPN: Suspect Parameter Number † Requests from the DGC-2020HD to the ECU for various parameters are made by issuing the request. ECU Limitations For some ECUs, an external source cannot stop the engine without removing power from the ECU.

  • Page 51: Can Bus Setup

    4. The most common SPN conversion method is 4 and is the default for the DGC-2020HD. Refer to ECU manufacturer documentation to determine the correct SPN conversion method of the ECU and set the SPN Conversion Method setting in the DGC-2020HD accordingly.
  • Page 52 Engine ECU Address value is always 0. Generator Parameter Transmit When the Generator Parameter Transmit setting is enabled, the DGC-2020HD broadcasts generator metered parameters over CAN as listed in Table 13. The Generator Parameter Transmit setting is not used when ECU Type is set for MTU MDEC, MTU ECU7/ECU8, or MTU Smart Connect.
  • Page 53 Oil Pressure Source With From ECU selected, the DGC-2020HD accepts oil pressure data from the ECU on CAN 2 (ECU). With From DGC Input selected, the DGC-2020HD accepts oil pressure data from the oil pressure engine sender input.
  • Page 54 ECU. The settling time should be set long enough so that any ECU parameters that require time to “settle down” after the ECU is on line can do so. Since the DGC-2020HD may use some of the ECU data for alarm or pre-alarm annunciation, it is important that the data have time to settle.
  • Page 55 If there is no competing claim from another device, the claimed address becomes the address the unit uses for all J1939 communications. If there are competing requests, an arbitration process occurs. When complete, all devices that broadcast on the network will DGC-2020HD Communication...

  • Page 56: Ecu Setup

    CAN Bus Address setting for the DGC-2020HD must be set to that address. The CAN Bus Address under the CAN Bus 2 (ECU) settings is the Address the DGC-2020HD claims on the J1939 network. The Engine ECU Address setting under the CAN Bus 2 (ECU) settings should be set to the address the engine ECU claims on the J1939 network.

  • Page 57: Speed Setup

    ECU. Daimler CPC4 When the ECU type is set for Daimler CPC4, the DGC-2020HD monitors the Torque Limit (LIM) Lamp Status broadcast via proprietary J1939 communications from the Daimler engine ECU to the DGC- 2020HD. When the monitored LIM Lamp status indicates the lamp is on solid, the DGC-2020HD annunciates a pre-alarm displaying the LIM symbol and text “Torque Limit”.
  • Page 58 J1939. The Primary Voltage Setpoint value represents the normal desired system voltage setpoint. Alternate Voltage Setpoint becomes the active system voltage setpoint when low line override is true. The range in which the DGC-2020HD biases voltage regulator var sharing and voltage trim is dictated by the Communication...

  • Page 59: Battery Charger Setup

    Figure 31. Settings Explorer, Communications, CAN Bus, Voltage Regulator Setup Table 16. Settings for Voltage Regulator Setup Locator Setting Range Increment Unit CAN Bus Type None, Basler, Marathon, or J1939 Primary Voltage Setpoint 100 to 600 volts Alternate Voltage Setpoint 100 to 600 volts...
  • Page 60 Figure 33. Settings Explorer, Communications, CAN Bus, Battery Charger Pre-Alarms Figure 34. Settings Explorer, Communications, CAN Bus, Sens Battery Charger Pre-Alarms RS-232 DGC-2020HD controllers are equipped with an RS-232 port which communicates with an external user- supplied telephone modem with dial-in and dial-out capability. RS-232 Setup ®...

  • Page 61: External Modem

    DGC-2020HD to dial up to four telephone numbers and annunciate user-selected conditions to specified pagers. Modem Setup Dial-Out An external modem gives the DGC-2020HD the ability to dial up to four telephone numbers and annunciate user-selected conditions to specified pager IDs. These user-selectable conditions are found in the following categories: •...
  • Page 62 Message strings sent by the DGC-2020HD can be limited to a length supported by the receiving pagers. If a message to be transmitted by the DGC-2020HD exceeds the pager message length limit, it will make multiple calls to transmit the complete message.
  • Page 63 Prior to establishing modem communication, the baud rate used by the PC must match the baud rate used by the DGC-2020HD. The baud rate used by the DGC-2020HD can be set directly through the front panel interface or through BESTCOMSPlus via USB (local) or Ethernet (remote) connection. If using the front panel, navigate to Settings >...

  • Page 64: Modbus Setup

    Front Panel Navigation Path: Settings > Communication > Modbus Setup The DGC-2020HD employs the Modbus communication protocol over the Ethernet and RS-485 ports simultaneously. Up to six TCP/IP Modbus masters are supported. A list of Modbus registers can be found in Basler Electric publication 9469300998, Modbus Protocol Instruction Manual.

  • Page 65: Email Setup

    Navigation Path: Settings Explorer, Communications, Email Setup Front Panel Navigation Path: Settings > Communication > Email Setup The DGC-2020HD is capable of sending email alerts when triggered by user-selected events. Setup of email notifications is made on the BESTCOMSPlus Email Setup screen (Settings Explorer, Communications, Email Setup) illustrated in Figure 40.

  • Page 66: Remote Display Panel (Optional)

    † The LED on the Remote Display Panel illuminates when the input that is assigned to this programmable function is closed. ‡ This LED can be reprogrammed in the DGC-2020HD to suit the needs of a particular application. The condition listed above is annunciated by default. See the BESTlogicPlus chapter for information about configuring the RDP Programmable Alarm and Pre-Alarm logic blocks.

  • Page 67: Device Configuration

    MPU and genset frequency. On engines with CAN-compatible ECUs, if MPU or MPU Freq is selected as the Speed Signal Source, the DGC-2020HD uses the CAN interface as the speed source when CAN is enabled. If Gen Freq is set as the Speed Signal Source, the DGC-2020HD uses the generator frequency.
  • Page 68 4 to 20 mA or -10 to 10 Vdc signal is used, select the appropriate analog input. Analog inputs 1 and 2 can always be selected. Analog inputs 3 and 4 are available to DGC-2020HD units with the analog sender inputs option (style number xxxxxxxxA).

  • Page 69: System Units

    A Swap Bus 1 with Bus 2 check box is provided to allow the metering of the bus VTs to be swapped internal to the DGC-2020HD, eliminating the need for physical swapping of the VT connections. Generator, Bus 1, and Bus 2 Labels Each bus can be programmed with a text label describing its use.

  • Page 70: Rated Data

    Settings Explorer, System Parameters, Rated Data, Bus 2 Rated Data (optional) Front Panel Navigation Paths: Settings > System Parameters > Rated Data, Gen Settings > System Parameters > Rated Data, Bus 1 Settings > System Parameters > Rated Data, Bus 2 (optional) Device Configuration DGC-2020HD...

  • Page 71: Voltage Ratings

    The secondary value of the generator CT is dictated by the style number of the controller. A DGC-2020HD with a style number of 1xxxxxxxx uses a nominal CT secondary rating of 1 Aac. A DGC-2020HD with a style number of 5xxxxxxxx uses a nominal CT secondary rating of 5 Aac.

  • Page 72: Power Ratings

    The frequency settings allow selection of the rated frequency of the generator and an alternate frequency. Rated Frequency of the Unit Rated frequency options are 50 and 60 Hz. Alternate Frequency This setting accepts values from 10 to 90, in increments of 0.01. Device Configuration DGC-2020HD...
  • Page 73 9469300995 Rev D Battery Volts Nominal voltage of the starter battery is used by the DGC-2020HD to detect and annunciate high, low, or weak battery voltage. Battery Volts options are 12 V and 24 V. Rated Engine RPM This field accepts values from 25 to 3,600, in increments of 1.
  • Page 74 9469300995 Rev D Figure 43. Settings Explorer, System Parameters, Rated Data, Bus Rated Data Screen (Read Only) Figure 44. Floating Rated Data Screen Device Configuration DGC-2020HD...

  • Page 75: Remote Module Setup

    For optional AEM-2020 setup, select Enable, input the appropriate J1939 address, and input the expected serial number. Expected serial numbers are used by the DGC-2020HD to determine which input/output points belong to a module when multiple modules are present. An AEM-2020 Not Configured pre-alarm occurs if the expected serial number does not match the serial number detected on the General Settings, Device Info screen.

  • Page 76: Crank Settings

    Front Panel Navigation Path: Settings > System Parameters > Crank Settings Crank settings consist of pre-start, restart, cranking, crank disconnect, and cooldown. These settings are described in the paragraphs below. Figure 46 illustrates the BESTCOMSPlus Crank Settings screen. Settings are listed in Table 21. Device Configuration DGC-2020HD...
  • Page 77 Pre-Start output is closed for the duration of the Pre-crank Delay time prior to re-entering the cranking state. If the Pre-crank delay setting is longer than the rest interval, the Pre-Start output is closed for the entire duration of the rest time. DGC-2020HD Device Configuration...

  • Page 78: Automatic Restart Settings

    Cool Down After the load is removed from a genset, the DGC-2020HD implements a smart cool down function. This function ensures that the engine and turbocharger properly cool down by maintaining engine operation for a user-defined duration.

  • Page 79: Exercise Timer Settings

    The Start Hour and Run Period Hours settings accept values from 0 to 23, in increments of 1 hour. The Start Minute and Run Period Minutes settings accept values from 0 to 59, in increments of 1. If Run with Load is enabled, the DGC-2020HD closes the generator breaker during the run time.

  • Page 80: Seven Day Timer

    4 hours, 00 minutes runs into the following Monday ending at 3:00 am. Fifty-six unique status inputs are available in logic that are true when a timer is active. Figure 49 illustrates the Seven Day Timer screen. Device Configuration DGC-2020HD...

  • Page 81: Sensing Transformer Ratings

    1, and optional bus 2 can be configured here. Figure 44 illustrates the floating Rated Data screen. Settings are listed in Table 20. Aux CT Mapping DGC-2020HD controllers with style number xxxxxxxBx have one auxiliary CT and controllers with style number xxxxxxxEx have four. Specify the mappings for each auxiliary CT using these settings. DGC-2020HD...

  • Page 82: Differential Transformer Ratings

    This setting accepts values from 1 to 9,999, in increments of 1. The secondary value of the ground current sensing CT is dictated by the style number of the controller. A DGC-2020HD with a style number of 1xxxxxxxx uses a nominal CT secondary rating of 1 Aac. A DGC-2020HD with a style number of 5xxxxxxxx uses a nominal CT secondary rating of 5 Aac.
  • Page 83 The Gen Differential CT Connection Type setting establishes the CT connection type on the generator side of the protected zone. The 87G Differential CT Connection Type setting establishes the CT connection type on the other side of the protected zone. DGC-2020HD Device Configuration...

  • Page 84: Relay Control Settings

    The default operational setting for the Start, Run, and Pre-start relays is Predefined or standard. Any of these relays can be logic driven by selecting the Programmable setting. Logic driven programmable relays must be set up using BESTlogicPlus Figure 52 illustrates the BESTCOMSPlus Relay Control screen. Device Configuration DGC-2020HD...

  • Page 85: System Configuration Detection Settings

    There is a one-second delay in the detection to prevent the DGC-2020HD from alternating between detected configurations. When the DGC-2020HD is in the Off mode or the engine is not running, the Automatic Configuration Detection function is disabled. The DGC-2020HD is assumed to be in the last valid automatically detected configuration.
  • Page 86 If the difference between the maximum and minimum line-to-line voltage exceeds this threshold, the unit is determined to be in single-phase configuration. If determined to be in single-phase configuration, the Single-phase Override programmable function forces the DGC-2020HD into single-phase mode. The single-phase mode connection is determined by the Single-phase Detect Generator Connection, below.

  • Page 87: Timekeeping

    The NTP (Network Time Protocol) synchronizes the real-time clock to a network time server or another DGC-2020HD on the network when an Ethernet cable is connected. The address of the NTP server must be entered when NTP is selected in the Time Priority Setup, Enabled box.
  • Page 88 Time Zone Minute Offset –59 to 59 minutes Time Format 12 Hour or 24 Hour Date Format YYYY-MM-DD MM-DD-YYYY DD-MM-YYYY DST Configuration Floating Dates or Fixed Dates Month January, February, March, April, May, June, July, August, September, October, November, or December Timekeeping DGC-2020HD...

  • Page 89: Setting The Time And Date

    When the clock rolls over to a new year, the year is automatically incremented in nonvolatile memory. A pre-alarm is annunciated for loss of IRIG signal. The pre-alarm monitors for IRIG signal loss once a valid signal is detected at the IRIG port. DGC-2020HD Timekeeping...
  • Page 90 9469300995 Rev D Timekeeping DGC-2020HD...

  • Page 91: Engine Sender Inputs

    Operation A current is provided to each sender. The developed voltage is measured and scaled for use by the internal circuitry. An open circuit or short circuit across the sender terminals will cause the DGC-2020HD to indicate a failed sender.
  • Page 92 If you want to save newly entered sender data as a sender library file, click Create Fuel Settings File and enter a file name and location to save the file. Click the Send Settings button in BESTCOMSPlus to send the sender settings to the DGC-2020HD. Figure 56. Settings Explorer, Programmable Senders, Fuel Level Screen Table 25.
  • Page 93 If you want to save newly entered sender data as a sender library file, click Create Oil Settings File and enter a file name and location to save the file. Click the Send Settings button in BESTCOMSPlus® to send the sender settings to the DGC-2020HD. Figure 57. Settings Explorer, Programmable Senders, Oil Pressure Screen Table 26.

  • Page 94: Sender Failure Detection

    C Sender Failure Detection The DGC-2020HD can detect a loss of signal at the coolant temperature, oil pressure, or fuel level sender input. Loss of signal is determined differently for resistive senders than for analog senders. When the DGC-2020HD is equipped with resistive senders (style number xxxxxxxxR), an open or short across the input terminals is considered to be a loss of signal.
  • Page 95 An alarm (and shutdown) is triggered if both speed signals are lost. The BESTCOMSPlus Sender Fail screen is illustrated in Figure 59 and is found in the Settings Explorer under Alarm Configuration. DGC-2020HD Engine Sender Inputs...
  • Page 96 0 to 300 ohms Alarm Configuration Status Only, Pre-Alarm, Alarm, Alarm with Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down Activation Delay 0 to 300 seconds Activation Delay 0 to 300 seconds Engine Sender Inputs DGC-2020HD...

  • Page 97: Contact Inputs

    9469300995 Rev D Contact Inputs Contact inputs are available to initiate DGC-2020HD functions. The DGC-2020HD has sixteen programmable contact sensing inputs. Additional contact inputs can be accommodated with up to four optional CEM-2020s (Contact Expansion Module). Contact Basler Electric for availability and ordering information.

  • Page 98: Programmable Functions

    • Automatic Transfer Switch (ATS) - Start and run the generator while the ATS input is true and the DGC-2020HD is in Auto mode. • Grounded Delta Override - Uses Grounded Delta sensing if the generator connection is set for Delta.
  • Page 99 Emergency Stop – When an input is assigned to the Emergency Stop Programmable Function, the input functions in a normally-closed manner. When the input is closed, no alarm is annunciated. When the input is open, the DGC-2020HD will open the Start, Run, and Prestart relays and annunciate an Emergency Stop Alarm.
  • Page 100 Always or While Engine Running Only Recognition Single Phase A-B or A-C Override Sensing Alarm Status Only, Pre-Alarm, Alarm, Alarm with Configuration Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down Activation Delay 0 to 300 seconds Contact Inputs DGC-2020HD...

  • Page 101: Analog Inputs

    DGC-2020HD units with the resistive sender option (style number xxxxxxxxR) are equipped with two analog inputs whereas units with the analog sender option (style number xxxxxxxxA) are equipped with four.

  • Page 102: Thresholds

    Alarm configurations are described in the Alarm Configuration chapter. Operational Settings Analog input protection operational settings are configured on the Analog Input #x (where x = 1 to 4 (3 and 4 optional)) settings screen (Figure 62) in BESTCOMSPlus. Settings are listed in Table 31. Analog Inputs DGC-2020HD...
  • Page 103 Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down Ranges Param Min -999,999 to 999,999 varies Param Max -999,999 to 999,999 varies Min Input Current 4 to 20 milliamps Max Input 4 to 20 milliamps Current DGC-2020HD Analog Inputs...

  • Page 104: Remote System Manager Input

    AEM1 In 1 to 8, AEM2 In 1 to 8, AEM3 In 1 to 8, or AEM4 In 1 to 8 Type Voltage or Current Min/Max Input Current 4 to 20 milliamps Min/Max Input Voltage -10 to 10 volts Analog Inputs DGC-2020HD...

  • Page 105: Logic Connections

    Analog input protection logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The Analog Input 1, Threshold 1 logic block is illustrated in Figure 64. The output is true during a trip condition. The alarm and pre-alarm logic blocks are similar. Figure 64. Analog Input Protection Logic Block DGC-2020HD Analog Inputs...
  • Page 106 9469300995 Rev D Analog Inputs DGC-2020HD...

  • Page 107: Contact Outputs

    Additional output contacts can be accommodated with up to four optional CEM-2020s (Contact Expansion Modules). Output contact operation is controlled by the operating mode of the DGC-2020HD. The state of the Emergency Stop contact input also affects output contact operation. When the Emergency Stop contact input is open (emergency stop condition), the Prestart, Start, and Run outputs open and an emergency stop alarm is annunciated.

  • Page 108: Programmable Contact Outputs

    Figure 66. Example Logic Scheme of Programmable Relays Programmable Contact Outputs DGC-2020HD controllers have 12 programmable output contacts (OUT 1 through 12). An additional 24 contact outputs are provided with an optional CEM-2020 (Contact Expansion Module). An optional CEM- 2020H (Contact Expansion Module - High Current) provides 18 contact outputs. Up to four CEM-2020s or CEM-2020Hs, in any combination, are supported by the DGC-2020HD.

  • Page 109: Configurable Elements

    If used for an alarm or pre-alarm, the user-assigned name appears in the alarm or pre-alarm annunciation and in the DGC-2020HD event log. Elements can be recognized always or only while the engine is running.
  • Page 110 Status Only, Pre-Alarm, Alarm, Alarm with Configuration Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down Activation 0 to 300 seconds Delay Label Text Up to 64 alphanumeric characters Contact Always or While Engine Running Only Recognition Contact Outputs DGC-2020HD...

  • Page 111: Breaker Management

    The following paragraphs describe how to properly configure DGC-2020HD system breaker control. Initial System Setup Connect the DGC-2020HD according to the appropriate figure in the Typical Applications chapter in the Installation manual for the type of generator connection desired (wye, delta, etc.). Set up the basic system parameters that will govern engine operation and alarm and pre-alarm annunciation.
  • Page 112 A system breaker configuration of Generator Breaker Control consists of a single generator breaker controlled by the DGC-2020HD. Figure 70 illustrates the Generator Breaker Control system breaker configuration. Figure 71 shows the Generator Breaker Control system breaker configuration with a mains bus and externally controlled mains breaker.
  • Page 113 Generator and Mains Breaker Control system breaker configurations consist of two breakers controlled by the DGC-2020HD. Figure 73 illustrates a Generator and Mains Breaker Control system breaker configuration without optional load bus metering. Figure 74 illustrates the one-line diagram of the Generator and Mains Breaker Control system breaker configuration as it appears in the BESTCOMSPlus System Settings screen.
  • Page 114 Generator and Group Breaker Control system breaker configurations consist of two breakers controlled by the DGC-2020HD. Figure 77 illustrates a Generator and Group Breaker Control system breaker configuration without optional load bus metering. Figure 78 illustrates the one-line diagram of the Generator and Group Breaker Control system breaker configuration as it appears in the BESTCOMSPlus System Settings screen.
  • Page 115 Metering Bus Metering Control Output Control Output Bus 1 DGC-2020HD P0076-45 Figure 77. System Breaker Configuration: Generator and Group Breaker Control Figure 78. System Breaker Configuration: Generator and Group Breaker Control as Displayed in BESTCOMSPlus System Settings Figure 79 illustrates a Generator and Group Breaker Control with Load Bus system breaker configuration.
  • Page 116 The Generator, Group, and Mains Breaker Control system breaker configuration consists of three breakers controlled by the DGC-2020HD. Figure 81 illustrates a Generator, Group, and Mains Breaker Control system breaker configuration. Figure 82 illustrates the one-line diagram of the Generator, Group, and Mains Breaker Control system breaker configuration as it appears in the BESTCOMSPlus System Settings screen.
  • Page 117 The Generator and Group Breakers to Segmented System breaker configuration consists of two breakers controlled by the DGC-2020HD. Figure 85 illustrates a Generator and Group Breakers to Segmented System breaker configuration. Figure 86 illustrates the one-line diagram of the Generator and Group Breakers to Segmented System breaker configuration as it appears in the BESTCOMSPlus System Settings screen.
  • Page 118 Settings Generator and Tie Breaker Control The Generator and Tie Breaker configuration consists of two breakers controlled by the DGC-2020HD. Figure 89 illustrates a Generator and Tie Breaker Control breaker configuration. Figure 90 illustrates the one-line diagram of the Generator and Tie Breaker Control breaker configuration as it appears in the BESTCOMSPlus System Settings screen.
  • Page 119 The Tie Breaker and Tie Breaker Control breaker configuration consists of two breakers controlled by the DGC-2020HD. Figure 91 illustrates a Tie Breaker and Tie Breaker Control breaker configuration. Figure 92 illustrates the one-line diagram of the Tie Breaker and Tie Breaker Control breaker configuration as it appears in the BESTCOMSPlus System Settings screen.

  • Page 120: Generator Breaker Settings

    Dead Bus Close Enable Enabling the Dead Bus Close Enable setting allows the DGC-2020HD to close the generator breaker onto a dead bus. This can be used to ensure that only one machine closes onto a dead bus at a time, thus preventing multiple machines simultaneously closing to the dead bus out of phase with each other.
  • Page 121 Open Attempts, Close Attempts, and Retry Delay After a breaker open or close failure occurs, the DGC-2020HD can attempt to reopen or reclose the breaker a pre-defined number of times. The number of attempts to open or close the breaker and the duration of time between each attempt are user-programmable.
  • Page 122 % of rated bus power Breaker Open Setpoint Delay 0 to 60 seconds Transition Delay 0 to 10 0.01 seconds Open Attempts 1 to 20 attempts Close Attempts 1 to 20 attempts Retry Delay 0 to 1,200 seconds Breaker Management DGC-2020HD...

  • Page 123: Mains Breaker Settings

    Auto mode. When the DGC-2020HD is following external breaker state changes, it issues outputs that correspond to the change in breaker state. If an external source opens the breaker, the DGC-2020HD issues a breaker open output.
  • Page 124 Open Attempts, Close Attempts, and Retry Delay After a breaker open or close failure occurs, the DGC-2020HD can attempt to reopen or reclose the breaker a pre-defined number of times. The number of attempts to open or close the breaker and the duration of time between each attempt are user-programmable.

  • Page 125: Group Breaker Settings

    Auto mode. When the DGC-2020HD is following external breaker state changes, it issues outputs that correspond to the change in breaker state. If an external source opens the breaker, the DGC-2020HD issues a breaker open output.
  • Page 126 Open Attempts, Close Attempts, and Retry Delay After a breaker open or close failure occurs, the DGC-2020HD can attempt to reopen or reclose the breaker a pre-defined number of times. The number of attempts to open or close the breaker and the duration of time between each attempt are user-programmable.

  • Page 127: Tie Breaker Settings

    Dead A to Dead B Close Enable Enabling this setting allows the breaker to close when Bus A and Bus B are both dead. DGC-2020HD Breaker Management...
  • Page 128 Auto mode. When the DGC-2020HD is following external breaker state changes, it issues outputs that correspond to the change in breaker state. If an external source opens the breaker, the DGC-2020HD issues a breaker open output.
  • Page 129 Open Attempts, Close Attempts, and Retry Delay After a breaker open or close failure occurs, the DGC-2020HD can attempt to reopen or reclose the breaker a pre-defined number of times. The number of attempts to open or close the breaker and the duration of time between each attempt are user-programmable.

  • Page 130: Tie Breaker 2 Settings

    Navigation Path: Settings Explorer, Breaker Management, Breaker Hardware, Tie Breaker 2 Front Panel Navigation Path: Settings Explorer > Breaker Management > Breaker Hardware > Tie Breaker 2 The Tie Breaker 2 Settings are identical to the Tie Breaker settings listed above, except for the following: Breaker Management DGC-2020HD...

  • Page 131: Start Up Synchronization

    For system breaker configurations which include a mains breaker, the DGC-2020HD can automatically transfer load power from the mains to a single genset or a group of gensets during a mains failure. This feature also enables the DGC-2020HD to transfer the load back to the mains once mains power is restored.
  • Page 132 If the In Phase Monitor setting is enabled and the Mains Fail Return Delay time has expired, the DGC-2020HD waits until it detects that the phases are aligned between the generators and the mains before performing the open transition from the generators back to the utility.
  • Page 133 9469300995 Rev D Mains Fail Transfer Process The steps taken by the DGC-2020HD during mains fail transfer and load takeover are listed below. Single Generator with Two Breaker Control Mains Fail Transfer Mains provides power. Detect Mains Fail or Mains Fail Test logic element asserted.
  • Page 134 (tie breaker controller or genset controller sensing mains power). iii. Open mains breaker at Mains Breaker Open Setpoint or after max parallel time. Generators provide power. Load Takeover removed. Transition to mains as in mains fail step 4, above. Back to 1. Breaker Management DGC-2020HD...
  • Page 135 The ramp stop level is determined by the mains fail controller (tie breaker controller or genset controller sensing mains power). iii. Open mains breaker at Mains Breaker Open Setpoint or after max parallel time. DGC-2020HD Breaker Management...
  • Page 136 Sync and close group breaker to load bus. Soft load based on ramp rate. iii. Open mains breaker at Mains Breaker Open Setpoint (if mains CT is configured), when baseload level is reached, or after max parallel time. Generator provides power. Breaker Management DGC-2020HD...

  • Page 137: Logic Elements

    Mains Fail Transfer Type setting. Mains Fail Test When true, the Mains Fail Test logic element causes the DGC-2020HD to react exactly as if the mains has failed. The following sequence of events occurs: Mains Fail Transfer Delay time expires...
  • Page 138 Transfer Fail Alarm is annunciated and the generators are shut down. If the Alarm State Transfer to Mains setting is enabled, the DGC-2020HD can transfer the load to a stable utility when in the alarm state. If this setting is disabled, the DGC-2020HD will not perform any transitions of the load to or from the utility when in the alarm state.
  • Page 139 Start Mode Single Generator or Group Start Max Parallel Time 0.1 to 10,000 Seconds Mains Fail Return Delay 0 o 1,800 Seconds Max Return Time 10 to 3,700 Seconds Mains Fail Transfer Delay 0 to 300 Seconds DGC-2020HD Breaker Management...

  • Page 140: Breaker Setup In Bestlogic™Plus

    Status input of the breaker element. This is the only way to indicate breaker status to the DGC-2020HD. If it is desired to have physical inputs that can request breaker open and close commands, connect the desired inputs to the open and close command inputs of the breaker element.

  • Page 141: Bus Condition Detection Settings

    "stable". Otherwise, it is deemed "failed". A “dead” bus is also considered to be “failed”. Caution The bus condition parameters are critical. They determine when a breaker can be closed. DGC-2020HD Breaker Management...
  • Page 142 Dead Gen Activation Delay 0.1 to 600 seconds Gen Failed Activation Delay 0.1 to 600 seconds 3 Phase and 1 Phase Overvoltage and Undervoltage Settings Pickup (V L-L) Volts 10 to 99,999 volts Breaker Management DGC-2020HD...

  • Page 143: Breaker Power Summing

    Figure 100. Settings Explorer, Breaker Management, Breaker Power Sum Breaker Operation The DGC-2020HD attempts to close a breaker only after verifying that it can be closed. If the breaker cannot be closed, the close request is ignored. Only one breaker can be closed at a time.
  • Page 144 • Logic Request - initiated from BESTlogicPlus. The type of response given for a local request depends on the operating mode of the DGC-2020HD. RUN Mode When in RUN mode, breakers can be closed manually using contact inputs or the breaker buttons on the BESTCOMSPlus Control screen.
  • Page 145 Dead Gen Close Enable Close If the generator breaker is already closed, the DGC-2020HD still attempts to close the breaker. It is assumed that since the breaker is already closed, the closure conditions have already been met. Mains Breaker Closure Conditions The conditions under which the DGC-2020HD will close the mains breaker are described in the following paragraphs.
  • Page 146 Gen or Mains. A Stable Load Bus is currently powered, but the source is unknown to the DGC-2020HD network. This could mean that a breaker is missing from the network.
  • Page 147 Gen or Mains. A Stable Load Bus is currently powered, but the source is unknown to the DGC-2020HD network. This could mean that a breaker is missing from the network.
  • Page 148 Now that the bus segment is no longer dead, any other segment must synchronize to this bus segment before the breaker tying these two segments can be closed. Breaker Management DGC-2020HD...
  • Page 149 The dead bus breaker close arbitration process occurs via inter-genset communication among all DGC-2020HD controllers on the network. All controllers on the network must be configured as the same System Type: Multiple Generator or Segmented Bus System. The System Type setting is found in Settings >...
  • Page 150 9469300995 Rev D Breaker Management DGC-2020HD...

  • Page 151: Synchronizer

    In Sync Only mode, the DGC-2020HD does not issue a breaker close pulse. It attempts to control the bias outputs to stay in sync until an open request is issued or a sync fail occurs.
  • Page 152 AB L-L voltages on the generator side of the breaker must be wired to the GEN VA and GEN VB terminals on the DGC-2020HD. The phase AB L-L voltages on the bus side of the breaker (the bus to which the generator will be connected when the breaker is closed) must be wired to the BUS VA and BUS VB terminals on the DGC-2020HD.
  • Page 153 Voltage Window 2 to 15 Breaker Closing Angle 3 to 20 degrees Fgen > Fbus Disable or Enable Vgen > Vbus Disable or Enable Sync Activation Delay 0.1 to 0.8 seconds Sync Fail Activation Delay 0.1 to 600 seconds DGC-2020HD Synchronizer...

  • Page 154: Configuration

    Group Voltage Gain 0.001 to 1,000 0.001 Configuration The following steps describe how to configure the DGC-2020HD automatic synchronizer using BESTCOMSPlus: Open the Style Number screen in the Settings Explorer, under General Settings. Verify the connected unit has the Automatic Synchronizer option.
  • Page 155 "Generator Breaker Open" for Output #5 and "Generator Breaker Close" for Output #6. If using contact outputs to control the governor and voltage regulator, label Output #9 as "GOV Raise", Output #10 as "GOV Lower", Output #11 as "AVR Raise", and Output #12 as "AVR Lower". See Figure 103. DGC-2020HD Synchronizer...
  • Page 156 Breaker Fail Wait Time is the time interval in which it is expected that the breaker will transition from open to closed or closed to open. If it does not change state within the specified time, a breaker failure is annunciated. Synchronizer DGC-2020HD...
  • Page 157 If pulsed contacts are used, set Contact Type to Pulsed and set appropriate open and close pulse times. Set Breaker Closing Time. This is the time used by the anticipatory synchronizer to calculate the advance angle before 0 degrees slip angle at which to issue the breaker close command. DGC-2020HD Synchronizer...
  • Page 158 When the voltage and frequency are outside the stable ranges for the duration of the Gen Failed Activation Delay, the generator is deemed “failed”. When the generator voltage is below the Dead Gen Threshold for the duration of the Dead Gen Activation Delay, the generator bus is deemed “Dead”. Synchronizer DGC-2020HD...
  • Page 159 Open the Synchronizer screen in the Settings Explorer, under Breaker Management. See Figure 101. Sync Type - Select either Anticipatory or Phase Lock Loop as the synchronizer type. Slip Frequency - The slip frequency setting is the maximum slip frequency that is in effect for a breaker close to occur. DGC-2020HD Synchronizer...
  • Page 160 Analog bias control output type. If this is chosen, it is also required to enter gains and loop gains of the voltage PID controller. These settings may have to be adjusted to achieve the desired response from the voltage regulator. Controller tuning procedures may be found in the Tuning PID Settings chapter. Synchronizer DGC-2020HD...
  • Page 161 Min Output Voltage (V) and Max Output Voltage (V) - If the Output Type is Voltage, these parameters must be configured. Set the minimum and maximum voltage to a range equal to the voltage bias input range for the voltage regulator. The range on these parameters is −10 V to +10 V. DGC-2020HD Synchronizer...
  • Page 162 Explorer, under Multigen Management. These parameters are identical to those of the AVR output. Set up programmable logic to allow the DGC-2020HD to synchronize the generator and close the generator breaker. In BESTlogicPlus Programmable Logic, click on the Elements tab and drag the GENBRK (Generator Breaker) element into the main logic screen.
  • Page 163 If using analog outputs to bias the voltage regulator and governor, no further setup is necessary. If using output contacts, they must be set up to drive these functions. In BESTlogicPlus programmable logic, click on the Elements tab. Drag the GOVR and AVR logic blocks into the main logic screen. See Figure 111. DGC-2020HD Synchronizer...
  • Page 164 Figure 111. Synchronizer Setup in BESTlogicPlus Step 27 Click on the I/O tab and drag the outputs assigned in step 4 into the main logic screen. Connect the GOVR and AVR blocks to the appropriate output contacts. See Figure 112. Synchronizer DGC-2020HD...
  • Page 165 9469300995 Rev D Figure 112. Synchronizer Setup in BESTlogicPlus Step 28 This concludes the implementation of the automatic synchronizer. DGC-2020HD Synchronizer...
  • Page 166 9469300995 Rev D Synchronizer DGC-2020HD...

  • Page 167: Bias Control

    Voltage biasing signals can be applied to an automatic voltage regulator using the analog output or contact outputs of the DGC-2020HD. Analog outputs provide a variable voltage from -10 to +10 Vdc or a variable current from 4 to 20 mAdc to the bias inputs of the AVR. Contact outputs provide raise and lower commands to the bias inputs of the AVR.

  • Page 168: Voltage Control

    The setting range of each pre-position setpoint is identical to that of the corresponding control mode setpoint. The Voltage Trim setpoint can be biased externally by an analog input of the DGC-2020HD, the optional AEM-2020, or the System Manager. The System Manager, which is the DGC-2020HD in the network with the lowest nonzero sequencing ID, can be set up to broadcast a bias signal for var, PF, or kW control.
  • Page 169 Kg Loop Gain 0 to 1,000 0.001 Trim Enable Disabled, Enabled When Gen Breaker is Closed, or Enabled Always Trim Deadband 0 to 2 % of rated volts Voltage Trim Setpoint Source Rated Voltage or Trim Voltage Setting DGC-2020HD Bias Control...

  • Page 170: Var/Pf Control

    When the Bias Control Output Type (on the Output Configuration screen) is set to analog, a PID controller controls the var/PF bias from the DGC-2020HD to the voltage regulator. The controller adjusts the bias output to drive the error between desired generator var/PF and measured generator var/PF to zero.

  • Page 171: Var Control

    The DGC-2020HD calculates an operating kvar setpoint based on the Setpoint Source setting. When the Setpoint Source setting is set to a DGC-2020HD analog input or an AEM-2020 input, the operating kvar setpoint is equal to the value calculated from the analog input. Parameters are available for kvar analog max and kvar analog min.
  • Page 172 30 seconds after a change in value. The saved setpoint is retained even after power is cycled to the DGC-2020HD. When Auto Save is disabled, adjustments to setpoints by raise/lower and pre-position commands are retained only for the duration of the current run session.

  • Page 173: Power Factor Control

    The DGC-2020HD calculates an operating power factor setpoint based on the Setpoint Source setting. When the Setpoint Source setting is set to a DGC-2020HD analog input or an AEM-2020 input, the operating power factor setpoint is equal to the value calculated from the analog input. Parameters are available for PF analog max and PF analog min.
  • Page 174 0.6 to -0.6 0.01 per unit Analog Bias Source None, Analog Input 1 to 4, AEM1 Input 1 to 8, AEM2 Input 1 to 8, AEM3 Input 1 to 8, AEM4 Input 1 to 8, or System Manager Bias Control DGC-2020HD...
  • Page 175 The BESTCOMSPlus Voltage Droop screen is illustrated in Figure 118. Settings are listed in Table 52. Figure 118. Settings Explorer, Bias Control Settings, AVR Bias Control Settings, Voltage Droop Table 52. Settings for Voltage Droop Locator Setting Range Increment Unit Droop Percentage 0 or 0.5 to 10 0.001 DGC-2020HD Bias Control...

  • Page 176: Governor Bias Control Settings

    Speed biasing signals can be applied to a governor using the analog output or contact outputs of the DGC-2020HD. Analog outputs provide a variable voltage from -10 to +10 Vdc or a variable current from 4 to 20 mAdc to the bias inputs of the governor. Contact outputs provide raise and lower commands to the bias inputs of the governor.

  • Page 177: Speed Control

    The DGC-2020HD returns to the configured Speed Trim value when a new run session is started or when power is cycled to the DGC-2020HD.
  • Page 178 None, Analog Input 1 to 4, AEM1 Input 1 to 8, AEM2 Input 1 to 8, AEM3 Input 1 to 8, AEM4 Input 1 to 8, or System Manager Remote Speed Bias (%) 0 to 100 0.001 Bias Control DGC-2020HD...

  • Page 179: Speed Droop

    Figure 121. Settings Explorer, Bias Control Settings, Governor Bias Control Settings, Speed Droop Table 55. Settings for Speed Droop Locator Setting Range Increment Unit Droop Percentage 0 or 0.5 to 10 0.001 Droop Gain 0 to 1,000 0.001 DGC-2020HD Bias Control...
  • Page 180 However, the change in engine speed due to load application is much slower than the change in real power. The DGC-2020HD senses the real power changes in load well before the engine speed is affected. Thus, a feed-forward signal, proportional to the real power change, is sent to the speed governor to make throttle adjustments in advance of the engine speed actually decreasing.
  • Page 181 Tld Lead Filter Constant 0 to 10 0.001 Tlg Lag Filter Constant 0 to 10 0.001 Power Deadband 0 to 1 0.001 Kla Gain 0 to 1,000 0.001 Max Limit 0 to 10 0.001 Min Limit -10 to 0 0.001 DGC-2020HD Bias Control...

  • Page 182: Load Control Settings

    KW control is accomplished with a PID controller that controls the speed bias signal from the DGC-2020HD to the speed governor. The controller adjusts the bias output to drive the error between desired kW generation and measured kW generation to zero. Settings are provided for proportional gain, integral gain, derivative gain, derivative filter constant, loop gain, Sync Gain and Parallel to Mains Gain of the PID controller.
  • Page 183 30 seconds after a change in value. The saved setpoint is retained even after power is cycled to the DGC-2020HD. When Auto Save is disabled, adjustments to setpoints by raise/lower and pre-position commands are retained only for the duration of the current run session.
  • Page 184 System Manager Baseload Analog Min 0 to 100 Baseload Analog Max 0 to 100 Auto Save Disabled or Enabled Baseload Level 0 to 100 Setpoint Min 50 to 200 0.01 Setpoint Max 50 to 200 0.01 Bias Control DGC-2020HD...
  • Page 185 30 seconds after a change in value. The saved setpoint is retained even after power is cycled to the DGC-2020HD. When Auto Save is disabled, adjustments to setpoints by raise/lower and pre-position commands are retained only for the duration of the current run session.
  • Page 186 Base Load Analog Max 0 to 100 Base Load Analog Min 0 to 100 Auto Save Disabled or Enabled Base Load Level 0 to 100 Setpoint Min 50 to 200 0.01 Setpoint Max 50 to 200 0.01 Bias Control DGC-2020HD...

  • Page 187: Contact Output Bias Control Setup In Bestlogic™Plus

    % per second Contact Output Bias Control Setup in BESTlogic™Plus The following steps describe how to configure DGC-2020HD contact outputs to control the voltage regulator and/or governor: Ensure proper wiring connections are made between the DGC-2020HD and the AVR and/or governor.
  • Page 188 Click on the I/O tab and drag the outputs assigned in step 1 into the main logic screen and connect them to the appropriate outputs of the AVR and GOVR blocks. See Figure 130. Upload settings and logic to the DGC-2020HD. Bias Control...

  • Page 189: Analog Output Bias Control Setup

    DGC-2020HD. Analog AVR Bias Control Setup Ensure proper wiring connections are made between the DGC-2020HD and the AVR. Use terminals AVR+ (64) and AVR- (65). Refer to the Terminals and Connectors and Typical Applications chapters in the Installation manual for more information.
  • Page 190 Figure 131. Settings Explorer, Multigen Management, AVR Output Analog Governor Bias Control Setup Ensure proper wiring connections are made between the DGC-2020HD and the governor. Use terminals GOV+ (66) and GOV- (67). Refer to the Terminals and Connectors and Typical Applications chapters in the Installation manual for more information.

  • Page 191: Mains Power Controller

    This is especially effective when used in conjunction with generators providing base load. In each of these modes, the generators are driven to a common setpoint. The DGC-2020HD in the group which controls the breaker currently tied to a mains-powered bus is chosen to broadcast the setpoint to all participating generators.
  • Page 192 The total real power output depends on the number of generators online and the base load setpoint. The setpoint is adjusted on the DGC-2020HD designated as the mains power controller and all paralleled generators are driven to that setpoint.
  • Page 193 30 seconds after a change in value. The saved setpoint is retained even after power is cycled to the DGC-2020HD. When Auto Save is disabled, adjustments to setpoints by raise/lower and pre-position commands are retained only for the duration of the current operating session.
  • Page 194 Start Level When system load exceeds this level, participating generators are started after the Start Time Delay expires. End Level When system load drops below this level, participating generators are stopped after the End Time Delay expires. Bias Control DGC-2020HD...
  • Page 195 This setting provides selections for Single Generator and Group Start. If Single Generator is selected, the DGC-2020HD sensing mains power starts the local generator to perform peak shaving even if there are other generators in the group. With Group Start selected, generators in a group are started as needed.
  • Page 196 In situations where there are multiple tie breakers or multiple mains ties, it is possible for more than one DGC-2020HD to be eligible for Mains Power Control. When there is more than one eligible Mains Power Controller, meaning that there is more than one breaker which is tied directly to a mains-powered bus, any one of them could become the DGC-2020HD which broadcasts the setpoint.
  • Page 197 Analog Input Source None, Analog Input 1 to 4, AEM1 Input 1 to 8, AEM2 Input 1 to 8, AEM3 Input 1 to 8, AEM4 Input 1 to 8, Bias Min -100 to 100 Bias Max -100 to 100 DGC-2020HD Bias Control...
  • Page 198 AEM4 Input 1 to 8, Bias Min -999,999 to 999,999 Bias Max -999,999 to 999,999 Adjust Rate 1 to 1,000 kW per second Pre-position, Setpoint 1 to 999,999 Pre-position, Adjust Rate 0 to 1,000 kW per second Bias Control DGC-2020HD...

  • Page 199: Multiple Generator Management

    AVR Output The AVR output of the DGC-2020HD is used to change the voltage setpoint of the generator. If the response is set for increasing, an increased bias will raise the voltage. If the response is set for decreasing, an increased bias will lower the voltage.

  • Page 200: Governor Output

    ∗ See Parameter Selection, below. Governor Output The governor output of the DGC-2020HD is used to change the speed setpoint of the generator. If the response is set for increasing, an increased bias will increase the speed. If the response is set for decreasing, an increased bias will decrease the speed.

  • Page 201: Load Share Output

    Parameter Selection When it is not necessary for the DGC-2020HD to communicate with the AVR or GOV, these outputs may be utilized for other purposes. Selectable parameters are listed in the Configurable Protection chapter. Param Min corresponds to the minimum output voltage or current setting. Param Max corresponds to the maximum output voltage or current setting.

  • Page 202: Demand Start/Stop

    The demand start/stop function operates in one of two modes: Per Unit Load or Spinning Reserve. When Per Unit Load mode is selected, the DGC-2020HD issues start and stop requests based on per unitized system load. When Spinning Reserve mode is selected, the DGC-2020HD provides extra generating capacity by starting an additional generator that is already connected to the system.

  • Page 203: Generator Sequencing

    If a mode mismatch occurs, verify that all machines on the network are configured for the same generator sequencing mode. Each DGC-2020HD maintains its own start/stop status with respect to sequencing. When there is a change to generator sequencing mode on any one unit, this change propagates to all connected units that are not in the disabled mode.

  • Page 204: Staggered Service Time

    The sequencing order is re-assessed every 24 hours in a system that is running for long periods of time. Multiple Generator Management DGC-2020HD...

  • Page 205: Network Configuration

    ID Repeat pre-alarm is enabled on the Pre-Alarms settings screen, an ID Repeat pre-alarm appears on the front panel and the BESTCOMSPlus metering screen. The BESTCOMSPlus Network Configuration screen is illustrated in Figure 140. DGC-2020HD Multiple Generator Management...

  • Page 206: Load Shedding

    Up to 16 Add Reserve Bias values can be added cumulatively to the default Add Reserve value by enabling the corresponding load shed bias enable (LDSHEDBIASENABLE1-16) logic elements. Figure 141. Priority 1 Load Enabled Logic Input Figure 142. Load Shed Bias Enable 1 Logic Element Multiple Generator Management DGC-2020HD...
  • Page 207 Load # Priority 0 to 255 Load # Shed Delay 0 to 60 seconds Load # Shed Fast Delay 0 to 60 seconds Load # Add Delay 0 to 3,600 seconds Load # Load kW 0 to 999,999 DGC-2020HD Multiple Generator Management...

  • Page 208: Group Start Settings

    Note In order for a generator to respond to Group Start requests, the DGC-2020HD must be in AUTO mode, the System Type must be configured as Segmented Bus System, and Sequencing and Demand Start/Stop must both be enabled.

  • Page 209: Group Segment Settings

    Input the number of all DGC-2020HDs configured as tie breaker controllers in the same network. This allows the DGC-2020HD to detect when a tie breaker controller is available or offline. If an expected tie breaker is not detected, the Missing System Component pre-alarm is annunciated.
  • Page 210 This selection labels the bus in the system for the system side of the group breaker. Figure 146. Settings Explorer, System Parameters, Group Segment Settings (Segmented System) Table 69 Settings for Group Segment Settings (Segmented System) Locator Setting Range Increment Unit System Breaker Configuration Disabled or Enabled Detection Multiple Generator Management DGC-2020HD...
  • Page 211 If one side of the tie breaker (A or B) is tied directly to mains power, this can be specified in the Tie Breaker settings under the Breaker Management branch. Figure 147. Settings Explorer, System Parameters, Group Settings (Tie Breaker Control Configuration) DGC-2020HD Multiple Generator Management...
  • Page 212 If one side of the tie breaker (B or C) is tied directly to mains power, this can be specified in the Tie Breaker 2 settings under the Breaker Management branch. Figure 148. Settings Explorer, System Parameters, Group Settings (Generator and Tie Breaker Control Configuration) Multiple Generator Management DGC-2020HD...
  • Page 213 This selection labels the bus in the system for the side of the tie breaker opposite side B, but not A. If one side of the tie breaker (B or C) is tied directly to mains power, this can be specified in the Tie Breaker 2 settings under the Breaker Management branch. DGC-2020HD Multiple Generator Management...

  • Page 214: Block Load Level Settings

    When the BLKLOADLEVEL1OVRD logic element (Figure 150) receives a true input, the kW value associated with the level 1 override becomes the active block load level. Only one block load level override is active at one time, even if multiple elements are true. Multiple Generator Management DGC-2020HD...
  • Page 215 Figure 151. Block Load Level 1 Offset Element The BESTCOMSPlus Block Load Level screen is illustrated in Figure 152. Figure 152. Settings Explorer, System Parameters, Group Settings, Block Load Level DGC-2020HD Multiple Generator Management...

  • Page 216: Group Configuration

    DGC-2020HDs, split into two generator groups. A group tie breaker joins the two generator groups and the two loads. Table 74 lists the pertinent System and Group Segment settings needed to support this topology. Figure 153. Example Network Topology Multiple Generator Management DGC-2020HD...
  • Page 217 Breaker 4 DGC1 Settings DGC-2020HD #1 is set up as a Tie Breaker controller connected to Mains on the A side. The System Type is set to Segmented Bus System because all DGC-2020HDs in the network (segmented bus system) must have this setting.
  • Page 218 DGC2 Settings DGC-2020HD #2 is set up as a Tie Breaker controller. The System Type is set to Segmented Bus System because all DGC-2020HDs in the network (segmented bus system) must have this setting.
  • Page 219 (segmented bus system) must have this setting. Generator Group Number is set to 2 because all of the components controlled by this DGC-2020HD are in Generator Group 2. Group Segment B is set to Load Bus. Side B of the group breaker should always be facing the system with controlled generators on side A.
  • Page 220 9469300995 Rev D Multiple Generator Management DGC-2020HD...

  • Page 221: Alarm Configuration

    9469300995 Rev D Alarm Configuration Configuration of DGC-2020HD alarms, pre-alarms, sender failure alarms, user programmable alarms, and the audible horn is described in the following paragraphs. Alarms ® BESTCOMSPlus Navigation Path: Settings Explorer, Alarm Configuration, Alarms Front Panel Navigation Path: Settings > Alarm Configuration > Alarms To configure alarms using BESTCOMSPlus, open the Alarm screen (Figure 154).
  • Page 222 Threshold 100 to 280 degrees F 38 to 138 degrees C Arming Delay 0 to 150 seconds Low Oil Pressure Settings Threshold 2.9 to 150 0.2 to 10.3 20 to 1034.5 Arming Delay 5 to 60 seconds Alarm Configuration DGC-2020HD...

  • Page 223: Pre-Alarms

    CAN and DTC support are both enabled, an Active DTC pre-alarm can be enabled to announce the presence of a condition that is causing a DTC to be sent from the ECU to the DGC-2020HD. AEM1 through AEM4 Comms Failure AEM-2020 communication failure pre-alarm settings consist of a single enable/disable setting.
  • Page 224 Ethernet 1 and Ethernet 2 link lost pre-alarm settings consist of a single enable/disable setting. If enabled, an Ethernet 1 or Ethernet 2 pre-alarm is annunciated if the Ethernet link between the DGC-2020HD and the network is lost. If Redundant Ethernet is enabled and the Redundant Mode setting is configured as ARP Ping, the pre-alarm will also be annunciated if a configured Ping IP target is not reachable from the Ethernet port.
  • Page 225 ID Missing ID missing pre-alarm settings consist of a single enable/disable setting. If enabled, an ID Missing pre- alarm is annunciated when an expected sequence ID of a DGC-2020HD is not detected on the network. ID Repeat ID repeat pre-alarm settings consist of a single enable/disable setting. If enabled, an ID Repeat pre-alarm is annunciated when two or more DGC-2020HDs report the same expected sequence ID.
  • Page 226 Synchronizer Failure pre-alarm is annunciated if the DGC-2020HD is running the auto-synchronizer to align the generator voltage and bus voltage to close a breaker, and the DGC-2020HD does not receive feedback from the breaker status indicating it is closed before the Sync Fail Activation delay time has expired.
  • Page 227 VRM-2020 communication failure pre-alarm settings consist of a single enable/disable setting. If enabled, a VRM-2020 Communication Failure pre-alarm is annunciated when communication between an optional VRM-2020 and DGC-2020HD is lost. Figure 155. Settings Explorer, Alarm Configuration, Pre-Alarms Table 76. Settings for Pre-Alarms...

  • Page 228: Horn Configuration

    If enabled, the contact output is closed when an alarm condition exists. The contact output is toggled between open and closed when a pre-alarm condition exists. If the Not in Auto setting is enabled, the horn is disabled when the DGC-2020HD is not operating in Auto mode. Alarm Configuration...

  • Page 229: Sender Fail Settings

    Selectable alarm configurations are described under the Annunciation heading, above. The selected alarm type is triggered when a sender failure exists for the duration of the activation time delay. Figure 157. Settings Explorer, Alarm Configuration, Sender Fail DGC-2020HD Alarm Configuration...

  • Page 230: User Programmable Alarms

    Alarm Configuration. When active, the label of a user alarm is displayed on the Alarms screen on the front-panel display and in the sequence of events report. Figure 158. Settings Explorer, Alarm Configuration, User Programmable Alarms Alarm Configuration DGC-2020HD...

  • Page 231: Protection

    9469300995 Rev D Protection Three tiers of protection are offered. DGC-2020HD controllers with style number xxSxxxxxx offer standard protection consisting of undervoltage (27), overvoltage (59), overfrequency (81O), underfrequency (81U), power (32), and loss of excitation (40Q) elements. Controllers with style number xxExxxxxx offer...
  • Page 232 DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).

  • Page 233: Overvoltage (59)

    Figure 160. Settings Explorer, Protection, Voltage, Undervoltage Overvoltage (59) Six overvoltage protection (59) elements monitor the sensing voltage applied to the DGC-2020HD. An element can be configured to protect against overvoltage when the phase voltage increases above a defined level.
  • Page 234 DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).

  • Page 235: Phase Voltage Imbalance (47)

    2020HD. An element can be configured to protect against voltage imbalances between any of the three phases. This element is available only in styles xxExxxxxx of the DGC-2020HD. The six, identical phase voltage imbalance protection elements are designated 47-1, 47-2, 47-3, 47-4, 47-5, and 47-6.
  • Page 236 DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).

  • Page 237: Vector Shift (78)

    This prevents the generator from remaining tied to the mains if the mains returns due to an external reclose device. Vector Shift elements are available only in styles xxExxxxxx of the DGC-2020HD. The two, identical vector shift protection elements are designated 78-1 and 78-2. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus®...
  • Page 238 Open Mains Breaker, Group Breaker, or Gen Breaker on Trip When Open Mains Breaker on Trip is enabled, the DGC-2020HD will request the mains breaker to open when a 78 trip is annunciated. When Open Gen Breaker on Trip is enabled, the DGC-2020HD will request the generator breaker to open when a 78 trip is annunciated.

  • Page 239: Frequency (81)

    For all sensing connections, the frequency is measured through the DGC-2020HD A- and B-phase sensing voltage connections. To measure frequency, the voltage sensed by the DGC-2020HD must be greater than 10 Vac. The measured frequency is the average of two cycles of voltage measurement.
  • Page 240 BESTlogicPlus programmable logic. When the Alternate Frequency Override is true, the scale factor setting serves as a multiplier for the pickup settings. For example, if a scale factor contact input is received by the DGC-2020HD and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).

  • Page 241: Frequency Rate-Of-Change

    Open Mains Breaker, Group Breaker, or Gen Breaker on Trip When Open Mains Breaker on Trip is enabled, the DGC-2020HD will request the mains breaker to open when an 81 trip is annunciated. When Open Gen Breaker on Trip is enabled, the DGC-2020HD will request the generator breaker to open when an 81 trip is annunciated.
  • Page 242 Figure 167. Frequency Element Logic Block Operational Settings Frequency element operational settings are configured on the Frequency settings screen (Figure 168) in BESTCOMSPlus. Setting ranges are defined in the Specifications chapter in the Installation manual. Figure 168. Settings Explorer, Protection, Frequency Protection DGC-2020HD...

  • Page 243: Current Imbalance (46)

    The phase-to-phase fault is made up of both positive and negative-sequence components as shown in total phase current. When these two factors ( √ 3/2 and 1/ √ 3) are combined, the √ 3 factors cancel which leaves the one-half factor. DGC-2020HD Protection...

  • Page 244: Coordination Settings

    Current Imbalance element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The Current Imbalance element logic block is illustrated in Figure 171. When the Block input is true, the 46 element is disabled. The Trip output is true when the 46 element is in a trip condition. Protection DGC-2020HD...

  • Page 245: Overcurrent (51)

    Figure 172. Settings Explorer, Protection, Current, Current Imbalance Overcurrent (51) Six overcurrent protection (51) elements monitor the current applied to the DGC-2020HD. An element can be configured to protect against overcurrent by monitoring a single- or three-phase system, neutral current, positive-sequence current, negative-sequence current, or ground current. This element is available only in styles xxExxxxxx of the DGC-2020HD.
  • Page 246 If the pickup condition subsides before the calculated time expires, the timer is reset, no corrective action is taken, and the element is rearmed for any other occurrences of overcurrent. Protection DGC-2020HD...
  • Page 247 DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).
  • Page 248 Curve to select T1, T2, T3, or T4. Table curves can be entered regardless of the curve chosen for the protection element. However, the table curve will not be enabled until T1, T2, T3, or T4 is selected as the curve for the protective element. Protection DGC-2020HD...
  • Page 249 A Voltage Restraint threshold of zero (0) disables voltage restraint/control and allows the 51 element to operate normally. Source A Source setting configures an overcurrent element to monitor the voltage at the generator sensing input terminals or the bus sensing input terminals when voltage restraint is enabled. DGC-2020HD Protection...
  • Page 250 Equation 17. Restraint Pickup Level Phase VT Configuration The 51/27R function monitors Vpp. Table 81 shows which voltage measurements are used by each 51 element for each possible phase VT connection. Table 81. Phase VT Connection Cross Reference Phase VT Connection Protection DGC-2020HD...

  • Page 251: Phase Current Differential (87G)

    This element is available only in style xxDxxxxEx. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus® and element operational settings are configured on the Phase Current Differential (87G) settings screen in BESTCOMSPlus. DGC-2020HD Protection...
  • Page 252 In some applications, the zone of protection may include only the generator. In other applications, a power transformer may be included in the generator zone of protection. If a fault is detected, the DGC-2020HD initiates a trip signal to isolate the protected zone. This action limits equipment damage and minimizes impact on the power system.
  • Page 253 9469300995 Rev D Figure 177. 87G Phase Differential Protection Functional Block Diagram DGC-2020HD Protection...
  • Page 254 In many cases, the second harmonic content of the inrush current may show up primarily in only one or two phases, which can cause one or two phases to not be inhibited. The DGC-2020HD allows the second harmonic currents to be shared between the three phases. When second harmonic sharing is enabled,...
  • Page 255 Equation 18. Or, the user can enter the MVA and kV base parameters (Equation 19) and the DGC-2020HD will calculate the tap-adjust factors using the CT Ratio (CTR) and Compensation Factor (COMP) parameters from the current measurement input function settings. For a transformer application, the mismatch will be at a minimum if the actual transformer voltage ratings are used.
  • Page 256 10, it will be necessary to adjust the CT ratios to bring the tap factors closer together. When the auto-tap calculation feature is used, the DGC-2020HD will give an error message if the spread ratio is greater than 10.
  • Page 257 (87G) settings screen (Figure 180) in BESTCOMSPlus. A legend for the chart (Figure 181) is shown by clicking the Help button on this screen. Setting ranges are defined in the Specifications chapter in the Installation manual. Figure 180. Settings Explorer, Protection, Current Figure 181. Phase Current Differential Operation Chart DGC-2020HD Protection...

  • Page 258: Neutral Current Differential (87N)

    Pickup Calculations The differential value is calculated as shown in Equation 22 and Equation 23 and displayed in BESTCOMSPlus metering and on the front-panel display. Protection DGC-2020HD...
  • Page 259 DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).

  • Page 260: Power (32)

    The Pickup setting entered is based on the CT secondary side (DGC-2020HD). When a single-phase override contact input is received, the DGC- 2020HD automatically switches from the three-phase power settings to the single-phase power settings.
  • Page 261 In addition to exceeding the threshold established by the Pickup setting, direction of power flow (forward or reverse) must match the Direction setting for the 32 element to operate. In the DGC-2020HD, the forward and reverse directions are defined by the polarity voltage and current connections to the controller as shown in Figure 184.

  • Page 262: Loss Of Excitation (40Q)

    Loss of Excitation screen in BESTCOMSPlus. BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Power, Loss of Excitation (40Q) Front Panel Navigation Path: Settings Explorer > Protection > Settings Group x (where x = 0 to 3) > Power Protection > Loss of Excitation (40Q) Protection DGC-2020HD...
  • Page 263 Rated kvar on the Rated Data screen. When a single-phase override contact input is received, the DGC-2020HD automatically switches from the three-phase loss of excitation settings to the single- phase loss of excitation settings. A 40Q element monitors three-phase reactive power when three-phase sensing is active or single-phase reactive power if single-phase sensing is active.

  • Page 264: Field Overvoltage

    DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is determined to be in a low-line configuration and the scale factor setting is 2.000, the pickup setting will be doubled (2.000 x PU).
  • Page 265 Figure 190. Field Overvoltage Logic Block Operational Settings Field overvoltage element operational settings are configured on the Field Overvoltage settings screen (Figure 191) in BESTCOMSPlus. Setting ranges are defined in the Specifications chapter in the Installation manual. DGC-2020HD Protection...

  • Page 266: Loss Of Sensing

    The scale factor setting is implemented when the DGC-2020HD is determined to be in a low-line configuration. The value of the scale factor setting serves as a multiplier for the pickup settings. For example, if the DGC-2020HD is Protection...

  • Page 267: Exciter Diode Monitor

    Low-Line Override function is assigned to a contact input via the Programmable Functions screen. If either method indicates a low-line configuration is in effect, then the DGC-2020HD is configured for low-line operation. Alarm Configuration An LOS trip can be user selected to trigger a different action depending on the alarm configuration setting.
  • Page 268 Exciter Diode Monitor element operational settings are configured on the Exciter Diode Monitor settings screen (Figure 193) in BESTCOMSPlus. Setting ranges are defined in the Specifications chapter in the Installation manual. Figure 195. Settings Explorer, Protection, Field Protection, Exciter Diode Monitor Protection DGC-2020HD...

  • Page 269: Setting Groups

    Changing Setting Groups When the DGC-2020HD switches to a new setting group, all functions are reset and initialized with the new operating parameters. The settings change occurs instantaneously so at no time is the DGC- 2020HD off line.
  • Page 270 9469300995 Rev D Protection DGC-2020HD...

  • Page 271: Time Curve Characteristics

    9469300995 Rev D Time Curve Characteristics The inverse time overcurrent characteristic curves provided by the DGC-2020HD (style xxExxxxxx only) closely emulate most of the common electromechanical, induction-disk, overcurrent relays sold in North America. To further improve proper relay coordination, a selection of integrated reset or instantaneous reset characteristics are also provided.

  • Page 272: Time Overcurrent Characteristic Curve Graphs

    § The programmable curve allows for four significant digits after the decimal place for every variable. Time Overcurrent Characteristic Curve Graphs The figures after the tables illustrate the characteristic curves of the DGC-2020HD. Table 85 cross- references each curve to existing electromechanical relay characteristics. Equivalent time dial settings were calculated at a value of five times pickup.

  • Page 273: Time Dial Setting Cross-Reference

    User Programmable Time Dial Setting Cross-Reference While the time characteristic curve shapes have been optimized for each relay, time dial settings of Basler Electric relays are not identical to the settings of electromechanical induction disk overcurrent relays. Table 86 helps you convert the time dial settings of induction disk relays to the equivalent setting for Basler Electric relays.
  • Page 274 In applications where the time coordination between curves is extremely close, we recommend that you choose the optimal time dial setting by inspection of the coordination study. In applications where coordination is tight, it is recommended that you retrofit your circuits with Basler Electric electronic relays to ensure high timing accuracy.
  • Page 275 46 �������� ���� ������������ ������������ ���� ���� ���� ���� Equation 29 ���� which, when M > 1, reduces to: ���� = 46 �������� ���� ���� �������� ���� ���� � � ������������ �������������������� ���� ���� ���� �������������������������������� ���� Equation 30 DGC-2020HD Time Curve Characteristics...
  • Page 276 9469300995 Rev D Figure 197. Time Characteristic Curve S1, Short Inverse (Similar to ABB CO-2) Time Curve Characteristics DGC-2020HD...
  • Page 277 9469300995 Rev D Figure 198. Time Characteristic Curve S2, Short Inverse (Similar To GE IAC-55) DGC-2020HD Time Curve Characteristics...
  • Page 278 9469300995 Rev D Figure 199. Time Characteristic Curve L1, Long Inverse (Similar to ABB CO-5) Time Curve Characteristics DGC-2020HD...
  • Page 279 9469300995 Rev D Figure 200. Time Characteristic Curve L2, Long Inverse (Similar To GE IAC-66) DGC-2020HD Time Curve Characteristics...
  • Page 280 9469300995 Rev D Figure 201. Time Characteristic Curve D, Definite Time (Similar To ABB CO-6) Time Curve Characteristics DGC-2020HD...
  • Page 281 9469300995 Rev D Figure 202. Time Characteristic Curve M, Moderately Inverse (Similar to ABB CO-7) DGC-2020HD Time Curve Characteristics...
  • Page 282 9469300995 Rev D Figure 203. Time Characteristic Curve I1, Inverse Time (Similar to ABB CO-8) Time Curve Characteristics DGC-2020HD...
  • Page 283 9469300995 Rev D Figure 204. Time Characteristic Curve I2, Inverse Time (Similar to GE IAC-51) DGC-2020HD Time Curve Characteristics...
  • Page 284 9469300995 Rev D Figure 205. Time Characteristic Curve V1, Very Inverse (Similar to ABB CO-9) Time Curve Characteristics DGC-2020HD...
  • Page 285 9469300995 Rev D Figure 206. Time Characteristic Curve V2, Very Inverse (Similar to GE IAC-53) DGC-2020HD Time Curve Characteristics...
  • Page 286 9469300995 Rev D Figure 207. Time Characteristic Curve E1, Extremely Inverse (Similar to ABB CO-11) Time Curve Characteristics DGC-2020HD...
  • Page 287 9469300995 Rev D Figure 208. Time Characteristic Curve E2, Extremely Inverse (Similar to GE IAC-77) DGC-2020HD Time Curve Characteristics...
  • Page 288 9469300995 Rev D Figure 209. Time Characteristic Curve A, Standard Inverse (BS 142) Time Curve Characteristics DGC-2020HD...
  • Page 289 9469300995 Rev D Figure 210. Time Characteristic Curve B, Very Inverse (BS 142) DGC-2020HD Time Curve Characteristics...
  • Page 290 9469300995 Rev D Figure 211. Time Characteristic Curve C, Extremely Inverse (BS 142) Time Curve Characteristics DGC-2020HD...
  • Page 291 9469300995 Rev D Figure 212. Time Characteristic Curve G, Long Time Inverse (BS 142) DGC-2020HD Time Curve Characteristics...
  • Page 292 Curves stop at pickup level. For example, if the user selects 5A FLC with a pickup setting of 0.5 A, the per-unit pickup is 0.1 A. The relay will not pick up at less than 0.1 pu I2 for these settings. Time Curve Characteristics DGC-2020HD...

  • Page 293: Configurable Protection

    9469300995 Rev D Configurable Protection Configurable protection can be used when the standard protection available with the DGC-2020HD does not meet the needs of the application. Thirty-two configurable protection elements are provided. Element Setup Parameter Selection The following parameters can be selected: •...
  • Page 294 Ramped Watt Demand per unit **AEM3_Labels.AnalogInputLabel5** • • Watt Demand per unit **AEM3_Labels.AnalogInputLabel6** • • Ramped var Demand per unit **AEM3_Labels.AnalogInputLabel7** • • var Demand per unit **AEM3_Labels.AnalogInputLabel8** • • Speed error **AEM3_Labels.RTDInputLabel1** • • Volt error **AEM3_Labels.RTDInputLabel2** Configurable Protection DGC-2020HD...
  • Page 295 Configurable Protection Output 7 Battery 2 Temperature • • Configurable Protection Output 8 Crankcase Pressure • • Configurable Protection Output 9 Fuel Filter Differential Pressure • • Configurable Protection Output 10 Oil Filter Differential Pressure • Configurable Protection Output 11 DGC-2020HD Configurable Protection...

  • Page 296: Thresholds

    Current low line scale factor is used when the parameter selection for configurable protection is set for any Generator, Bus 1, or Bus 2 current parameter. Thresholds There are four programmable thresholds for each configurable protection element. Each threshold has a mode setting, threshold setting, activation delay setting, and an alarm configuration setting. Configurable Protection DGC-2020HD...

  • Page 297: Logic Connections

    Front Panel Navigation Path: Settings > Protection > Configurable Protection > Configurable Protection # Configurable protection operational settings are configured on the Configurable Protection settings screen (Figure 215) in BESTCOMSPlus or through the front panel. Settings are listed in Table 87. DGC-2020HD Configurable Protection...
  • Page 298 0.001 to 100 0.001 Factor Voltage Low Line Scale Factor 0.001 to 3 0.001 Current Low Line Scale Factor 0.001 to 3 0.001 Mode Disabled, Over, or Under Threshold –999,999 to 999,999 0.01 Activation Delay 0 to 300 seconds Configurable Protection DGC-2020HD...
  • Page 299 Locator Setting Range Increment Unit Alarm Configuration Status Only, Pre- Alarm, Alarm, Alarm with Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down ∗See Parameter Selection, above, for a complete listing of selectable parameters. DGC-2020HD Configurable Protection...
  • Page 300 9469300995 Rev D Configurable Protection DGC-2020HD...

  • Page 301: Configurable J1939 Diagnostic Trouble Code (Dtc) Detection

    Code (DTC) Detection Configurable DTC detection can be used for handling of proprietary DTCs that may not be stored in the DGC-2020HD. Sixteen configurable DTC detection elements are provided. Element Setup and Operation Each configurable DTC has an alarm configuration, contact recognition type, and an activation delay. The detection is active when the chosen SPN and FMI in the configurable DTC object match with one of the received DTCs.
  • Page 302 Alarm, Alarm, Alarm with Unload, Alarm with Cool Down, or Alarm with Unload then Cool Down Activation Delay 0 to 300 seconds Suspect Parameter Number 0 to 524,287 Failure Mode Indicator 0 to 31 Configurable J1939 Diagnostic Trouble Code (DTC) Detection DGC-2020HD...

  • Page 303: Bestlogic™Plus

    BESTlogicPlus equations entered and saved in the DGC-2020HD system's nonvolatile memory integrate (electronically wire) the selected or enabled protection and control blocks with control inputs and hardware outputs. A group of logic equations defining the logic of the DGC-2020HD is called a logic scheme.

  • Page 304: Bestlogic™Plus Composition

    True when Remote Contact Input x is active, the Alarm Configuration is set to Status Only, and the activation delay has expired. Input x True when Virtual Input x is active. Input x True when Modbus Switch x is active. BESTlogic™Plus DGC-2020HD...
  • Page 305 ATS logic element is true. Audible Horn True when the Audible Horn is active. Auto Mode True when the DGC-2020HD is in Auto Mode or the Auto Mode logic element is true. Auto Restart True when the Automatic Restart function is active.
  • Page 306 One breaker may be controlled by multiple DGC-2020HDs, however only one unit is granted control over the breaker at a time. This input is true on the DGC-2020HD which is currently granted control over the breaker. Breaker Status, Generator Breaker, State True when the local generator breaker is closed.
  • Page 307 True when Bus x is within the appropriate stable bus conditions. Bus Status, Gen, Dead True when the Gen voltage is below the dead gen threshold. Bus Status, Gen, Fail True when the Gen is outside the appropriate stable gen conditions. DGC-2020HD BESTlogic™Plus...
  • Page 308 Timer is true under two circumstances: The unit is in Auto mode and ATS is removed, causing the DGC-2020HD to go into a cool down state. The engine is running (in Run or Auto mode with ATS applied) and the load has been removed (i.e. the EPSSUPLOAD status input is false due to small load).
  • Page 309 True when the 81-x element is tripped. Generator Protection, Loss of MAINS Protection, Vector Shift Trip (78-x) True when the 78-x element is tripped. Generator Protection, Power, Loss of Excitation Trip (40Q-x) True when the 40Q-x element is tripped. DGC-2020HD BESTlogic™Plus...
  • Page 310 Generator Protection, Voltage, Undervoltage Trip (27-x) True when the 27-x element is tripped. Generator States, In Alarm State True when the DGC-2020HD is in the alarm state. Generator States, In Connecting State True when the DGC-2020HD is in the connecting state.
  • Page 311 It remains true until the utility power is deemed good and the DGC-2020HD transfers the load back to utility power. Mains Fail Transfer, Disabled True when the DGC-2020HD is operating in the OFF or RUN modes or in the alarm state. Mains Fail Transfer, Timer Active True when the mains fail transfer delay timer is actively counting.
  • Page 312 True when mains fail transfer function detects the load is powered from the mains bus. Off Mode True when the DGC-2020HD is in Off Mode or the Off Mode logic element is true. Off Mode Cool Down True when the DGC-2020HD is in Off Mode and cooling down.
  • Page 313 Restart Delay Active True when the Restart Delay timer is timing out. Run Mode True when the DGC-2020HD is in Run Mode or the Run Mode logic element is true. Run Relay Status True when the DGC-2020HD is indicating that the Run relay should be closed.
  • Page 314 True when the group bus rotation of the segmented system matches the Phase Rotation setting. System Bus Status, Group Bus, Reverse Rotation True when the group bus rotation of the segmented system is opposite of the Phase Rotation setting. BESTlogic™Plus DGC-2020HD...
  • Page 315 Engine ECU to the DGC via J1939 CAN Bus communications. Using Trim Voltage Setting True when voltage trim is active. var Mode Active True when var mode is active. VRM, Connected True when an optional VRM-2020 is connected to the DGC- 2020HD. DGC-2020HD BESTlogic™Plus...
  • Page 316 VRM, Soft Start Active True when the soft start function is active. VRM, Regulator Started True when the DGC-2020HD is regulating with the VRM-2020. VRM, Gen Below 10 Hz True when the measured generator frequency is less than 10 VRM, Null Balance True when the setpoint of the inactive operating modes match the setpoint of the active mode.
  • Page 317 A service tool may be required to restart the engine. Diagnostic Trouble Alarm This alarm is annunciated when Diagnostic Trouble Codes (DTCs) have been received by the DGC-2020HD, the ECU Red Lamp Status in the DTC is active, and the engine has stopped running. ECU Comm Loss True when communication to the ECU has been lost.
  • Page 318 High Coolant Temp True when the High Coolant Temp Alarm settings have been exceeded. Isuzu DEF Low Refill DEF True when an Isuzu Engine ECU has communicated the DEF Low status and the No Power status to the DGC-2020HD. BESTlogic™Plus DGC-2020HD...
  • Page 319 Mains Fail Transfer Failed True when a mains fail transfer fail alarm occurs. The alarm occurs when the DGC-2020HD is configured for mains fail transfers, but has not transferred to the generator from the utility before the Mains Fail Max Transfer Time has expired. It remains true until the alarm is cleared by pressing the Reset button on the front panel.
  • Page 320 True when the Loss of Sensing element is configured as an alarm and has tripped. VRM, OEL Alarm True when the overexcitation limiter is configured as an alarm and has activated. VRM, UEL Alarm True when the underexcitation limiter is configured as an alarm and has activated. BESTlogic™Plus DGC-2020HD...
  • Page 321 Battery Charger 1 and 2, Thermal Limit Pre-alarm indicating the battery charger temperature is beyond the thermal limit. Battery Charger Fail True when the Battery Charger Fail function is configured as a pre- alarm and the activation delay has expired. DGC-2020HD BESTlogic™Plus...
  • Page 322 Breaker Status, Group Breaker, Close Failure True when a group breaker close fail pre-alarm occurs. The pre- alarm occurs when the DGC-2020HD has issued a group breaker close output but does not receive a group breaker status input that indicates the breaker has closed before the breaker fail wait time has expired.
  • Page 323 Breaker Status, Tie Breaker 2, Close Failure True when a Tie Breaker 2 close fail pre-alarm occurs. The pre- alarm occurs when the DGC-2020HD has issued a tie breaker close output but does not receive a Tie Breaker 2 status input that indicates the breaker has closed before the breaker fail wait time has expired.
  • Page 324 True when expected critical breakers are not detected on the network. Dead Bus Control Grant Fail True when the DGC-2020HD is denied permission to close a breaker onto a dead bus after a fixed 10-second delay. The dead bus breaker close request is then canceled for this unit.
  • Page 325 True when the engine ECU reports via CAN Bus that Diesel Particulate Filter (DPF) soot level is high. DPF Soot Level Moderately High True when Diesel Particulate Filter (DPF) lamp status (yellow warning) broadcast over CAN Bus indicates that the soot level is moderately high. DGC-2020HD BESTlogic™Plus...
  • Page 326 Low indication, Purge in Progress, Exhaust System Error, Exhaust System Inducement Indications, etc. This is derived based on ECU Lamp conditions communicated from the Engine ECU to the DGC-2020HD via J1939 CAN Bus communications. Exhaust System Escape Mode This pre-alarm indicates a temporary override of inducement not to operate the engine.
  • Page 327 True when the High Fuel Level Pre-Alarm settings have been exceeded. Intergenerator Comm Fail True when the DGC-2020HD detects that an individual generator previously connected to a generator network has lost connection. IRIG Sync Lost True when the IRIG signal is lost. The pre-alarm monitors for IRIG signal loss once a valid signal is detected at the IRIG port.
  • Page 328 True when the Alarm Configuration is set to Pre-Alarm and the threshold has been exceeded. Programmable Inputs, Remote Contact Inputs, CEM1, Input x True when Remote Contact Input x is active, the Alarm Configuration is set to Pre-Alarm, and the activation delay has expired. BESTlogic™Plus DGC-2020HD...
  • Page 329 True when the Voltage Sensing Fail is configured as a pre-alarm and the activation delay has expired. System Segments Unreachable True when the DGC-2020HD has detected all bus segments are not reachable by the DGC-2020HD making the annunciation via the available statuses from other tie breaker controllers in the system.
  • Page 330 Place an LCR output on the end of the partial logic network and then use the corresponding LCR input to build more logic than was previously possible. Output 1-64 See description above. BESTlogic™Plus DGC-2020HD...
  • Page 331 The latch is set when the Set input is true and the Reset input is false. The latch is cleared when the Reset input is true. Set Priority Latch The latch is set when the Set input is true. The latch is cleared when the Set input is false and the Reset input is true. DGC-2020HD BESTlogic™Plus...
  • Page 332 XNOR Input Output When an XNOR gate has more than 2 inputs, the output is true whenever an even number of inputs are true. The output is also true if no inputs are true. BESTlogic™Plus DGC-2020HD...
  • Page 333 Pickup and dropout logic timer logic blocks are shown in Figure 219. Timing accuracy is ±15 milliseconds. Initiate Initiate Output Pickup Timer Pickup Time Output P0048-03 Initiate Initiate Dropout Output Dropout Time Timer Output Figure 219. Pickup and Dropout Timer Logic Blocks DGC-2020HD BESTlogic™Plus...
  • Page 334 78-x vector shift element is in a trip condition. Connect to another logic block input. 81-x When the Block input is true, the 81-x element is disabled. The Trip output is true when the 81-x frequency element is in a trip condition. Connect to another logic block input. BESTlogic™Plus DGC-2020HD...
  • Page 335 Automatic breaker operation is inhibited when the Set input is true. Auto Mode When the Set input is true, and the DGC-2020HD is in OFF mode, the DGC- 2020HD will switch to AUTO mode. This is a pulsed input. It does not need to be held after the desired mode switch has occurred.
  • Page 336 Negative error integration is allowed. This is especially useful when the OEL is active. Base Load Setpoint Raise/lower: When true, the raise and lower inputs adjust the operating setpoint. Pre-position x: When true, the associated pre-position becomes the active base load setpoint. BESTlogic™Plus DGC-2020HD...
  • Page 337 One breaker may be controlled by multiple DGC-2020HDs, however only one unit is granted control over the breaker at a time. When true, this element prevents the DGC-2020HD from being granted control of a breaker. Block Load Level x Offset When true, the value associated with this offset is added to the currently active block load level.
  • Page 338 • Synchronization is in progress • The machine is operating with the generator breaker closed • The Cylinder Cutout Disable setting is true • The Cylinder Cutout Disable logic element is true BESTlogic™Plus DGC-2020HD...
  • Page 339 Data Log Trigger A data log is triggered when the Trigger input is pulsed true. Dead Bus Close Inhibit When true, the DGC-2020HD is prevented from closing a breaker onto a dead bus. Differential Report Trigger A differential report is triggered when the Trigger input is pulsed true.
  • Page 340 AUTO mode and the ATS contact has been removed. External Start Delay If the Set input is true while the DGC-2020HD is in the Pre Start state, the DGC- 2020HD will remain in the Pre Start state until the Set input is false.
  • Page 341 Open: This output is pulsed true (closes the output contact it is mapped to) when the DGC-2020HD is providing a signal to the breaker to open. It will be a pulse if the Breaker Output Contact Type is set to Pulse on the Breaker Hardware screen under Breaker Management in the Settings Explorer, and the length is determined by the Open Pulse Time.
  • Page 342 Open: This output is pulsed true (closes the output contact it is mapped to) when the DGC-2020HD is providing a signal to the breaker to open. It will be a pulse if the Breaker Output Contact Type is set to Pulse on the Group Breaker screen, and the length is determined by the Open Pulse Time.
  • Page 343 Symbol Idle Request When the Set input is true, the DGC-2020HD sends an idle request to the ECU on J1939 engines that are equipped to receive such a request. The request consists of an enable bit command and an idle RPM setting. At this time, only Volvo and Cummins are implemented.
  • Page 344 When true, the kW control PID Controller that affects speed bias is disabled. KW Mains Parallel Setpoint Adjust Raise/lower: When true, the raise and lower inputs adjust the KW Mains Parallel setpoint. Pre-position X Enable: When true, the associated pre-position becomes the active KW Mains Parallel setpoint. BESTlogic™Plus DGC-2020HD...
  • Page 345 Line Drop Disable (VRM-2020) When true, line drop compensation is disabled. Live Bus Close Inhibit When true, the DGC-2020HD is prevented from closing a breaker onto a live bus. Load Anticipation Inhibit When true, the load anticipation function is disabled.
  • Page 346 Fast, and Trip All inputs have priority over this input to allow the load shed function to operate. Note that loads with priority of 0 are disabled, thus they are not enabled when Add All is true. Logic Alarm When the Set input is true, the DGC-2020HD goes into an alarm condition. BESTlogic™Plus DGC-2020HD...
  • Page 347 See Logic Input Counter Threshold Settings, below, for more information on threshold settings. Logic Pre-Alarm When the Set input is true, the DGC-2020HD goes into a Pre-alarm condition. Loss of Sensing (VRM-2020) When the Block input is true, the Loss of Sensing element is disabled. The Trip output is true when the Loss of Sensing element is in a trip condition.
  • Page 348 Open: This output is pulsed true (closes the output contact it is mapped to) when the DGC-2020HD is providing a signal to the breaker to open. It will be a pulse if the Contact Type is set to Pulse on the Mains Breaker screen, and the length is determined by the Open Pulse Time.
  • Page 349 Symbol Mains Fail Test When the Set input is true, the DGC-2020HD will exercise its mains fail transfer function exactly as it would if the mains were to fail on a mains fail machine. This can be used as a test of the mains fail transfer capability of the unit without having to cause a true mains failure.
  • Page 350 When true, this element enables the use of OEL when the unit is considered to be online. Off Mode When the Set input is true, the DGC-2020HD will switch to OFF mode. This is a pulsed input. It does not need to be held after the desired mode switch has occurred.
  • Page 351 Name/Description Symbol Paralleled to Mains Setting the Paralleled input to true indicates to the DGC-2020HD that it is paralleled to a utility. When paralleled to the utility, the kW controller will regulate the machine’s kW output at the Base Load Level (%) that is set on the Governor Bias Control Settings screen, where the Base Load Level is in percent of the machine’s rated...
  • Page 352 When the Prestart Output Relay configuration is set to “Predefined”, the prestart relay is closed according to the predefined prestart functionality of the DGC-2020HD. When the “Predefined” functionality is selected, the relay will not respond to this element.
  • Page 353 Run Mode When the Set input is true, and the DGC-2020HD is in OFF mode, the DGC- 2020HD will switch to RUN mode. This is a pulsed input. It does not need to be held after the desired mode switch has occurred.
  • Page 354 Speed Lower This element lowers the speed setting of the DGC-2020HD by up to 2 rpm per second. After the speed has not been lowered for 30 seconds, the modified speed is saved to nonvolatile memory.
  • Page 355 Regulator Start Stop (VRM-2020) Start: When the Start input is true, the DGC-2020HD starts regulation with the VRM-2020. Stop: When the Stop input is true, the DGC-2020HD stops regulation with the VRM-2020.
  • Page 356 If the TESTINHIBIT logic function is false during an exercise period, or transitions from true to false at any time during an exercise period, the DGC- 2020HD will start and run the generator for the duration of the exercise period. BESTlogic™Plus DGC-2020HD...
  • Page 357 Open: This output is pulsed true (closes the output contact it is mapped to) when the DGC-2020HD is providing a signal to the breaker to open. It will be a pulse if the Contact Type is set to Pulse on the Mains Breaker screen, and the length is determined by the Open Pulse Time.
  • Page 358 Alarms screen on the front-panel display and in sequence of events report after the activation delay expires. Voltage Droop Override When true, this element causes the DGC-2020HD to switch from kvar sharing over Ethernet to voltage droop mode. Voltage Trim Droop Enable When true, this element enables droop mode for the voltage trim function.

  • Page 359: Logic Input Counter Threshold Settings

    A logic scheme is a group of logic variables written in equation form that defines the operation of a DGC-2020HD Digital Genset Controller. Each logic scheme is given a unique name. This gives you the ability to select a specific scheme and be confident that the selected scheme is in operation. The default active logic scheme is configured for typical control applications.

  • Page 360: The Active Logic Scheme

    DGC-2020HD in service. Sending a Logic Scheme to the DGC-2020HD To send logic to the DGC-2020HD, it must be connected to a computer through a communications port. Once the necessary connections are made, logic can be uploaded to the DGC-2020HD by selecting Upload Settings and Logic to Device or Upload Logic to Device on the Communication pull-down menu.

  • Page 361: Offline Logic Simulator

    An example of the offline logic simulator is shown in Figure 221. Output 1 is Logic 0 (red) when Virtual Switch 1 is Logic 0 (red) and Fixed 1 is Logic 1 (green). Figure 221. Offline Logic Simulator Example DGC-2020HD BESTlogic™Plus...

  • Page 362: Bestlogic™Plus File Management

    After programming BESTlogicPlus settings, click on the Save button to save the settings to memory. Before the new BESTlogicPlus settings can be uploaded to the DGC-2020HD, you must select Save from the File pull-down menu located at the top of the BESTCOMSPlus main shell. This step will save both the BESTlogicPlus settings and the operating settings to a file.

  • Page 363: Bestlogic™Plus Examples

    Output 3 becomes true when the 27TRIP is true. Output 1 becomes true when the High Coolant Temp is true. Output 2 becomes true when the DGC-2020HD is in RUN mode (RUN Mode true). Refer to Figure 225.
  • Page 364 9469300995 Rev D Figure 225. Example 3 – Multiple Logic Connections BESTlogic™Plus DGC-2020HD...

  • Page 365: Tuning Pid Settings

    Voltage and Speed Controllers The voltage and speed controllers are in effect when the DGC-2020HD is synchronizing the generator to a bus. When synchronizing, these controllers adjust the speed and voltage output of the generator to match that of the bus.

  • Page 366: Tuning Procedures

    0. Set the K values to 0.1. The voltage controller is active during synchronization when the DGC-2020HD is trying to close the generator breaker, and also when the generator breaker is closed and the generator is not paralleled to utility power and the voltage trim function is enabled.
  • Page 367 If it is not possible to obtain stable voltage operation, it may be necessary to reduce the control gains in the voltage regulator which has its analog bias input driven by the DGC-2020HD. - Integral Gain Set the initial value of K to be a tenth of the value set for K .
  • Page 368 If it is not possible to obtain stable speed operation, it may be necessary to reduce the control gains in the governor which has its analog bias input driven by the DGC-2020HD. - Integral Gain Set the initial value of K to be a tenth of the value set for K .
  • Page 369 If it is not possible to obtain stable var controller operation, it may be necessary to reduce the control gains in the voltage regulator which has its bias input driven by the DGC-2020HD. - Integral Gain...
  • Page 370 If it is not possible to obtain stable kvar sharing, it may be necessary to reduce the control gains in the AVR which has its analog bias input driven by the DGC-2020HD. - Integral Gain...
  • Page 371 If it is not possible to obtain stable kW controller operation, it may be necessary to reduce the control gains in the engine governor which has its bias input driven by the DGC-2020HD. - Integral Gain...

  • Page 372: Generic Gains For Multiple Machine Types

    DGC-2020HD. Test at various levels of kW load if a means of varying kW load is available. - Integral Gain...

  • Page 373: Load Anticipation Tuning Procedure

    When properly tuned, the load anticipation function improves speed recovery of a diesel genset during load application. The DGC-2020HD senses real power change in load well before the engine speed is affected. A feed-forward signal, proportional to the real power change, is sent to the speed governor to make throttle adjustments in advance.
  • Page 374 See Figure 228. Verify washout output has mostly decayed before the speed first returns to nominal value. Load anticipation assists the governor during the first portion of the transient before the speed dip is measured. After this, normal governor action compensates for changes. Tuning PID Settings DGC-2020HD...
  • Page 375 Load Anticipation Output signal. Increase Max and Min Limits. Figure 232 illustrates the plot with a good response with less than 0.5 Hz deviation on load application with minimum overshoot. Figure 229. Kla Too Low – Frequency Recovery Improved with ~2 Hz Deviation DGC-2020HD Tuning PID Settings...
  • Page 376 9469300995 Rev D Figure 230. Kla Gain Too High, GOV Output Saturated, Frequency Overshoots on Recovery. Figure 231. Load Anticipation Output Clipped. Tuning PID Settings DGC-2020HD...
  • Page 377 Set the Power Deadband to the highest magnitude seen on the lead-lag output during steady state operation. Increase the Power Deadband to prevent Load anticipation from responding to small load applications if desired. If load anticipation does not seem to operate properly, refer to the Troubleshooting chapter. DGC-2020HD Tuning PID Settings...
  • Page 378 9469300995 Rev D Tuning PID Settings DGC-2020HD...

  • Page 379: Exhaust Treatment

    DPF Control DPF control information is sent from the DGC-2020HD to the Engine ECU through PGN Number 57244 (0xE000). A manual regeneration request is sent using SPN 3696, Diesel Particulate Filter Regeneration Force Switch. Regeneration can be inhibited by SPN 3695, Diesel Particulate Filter Regeneration Inhibit Switch.
  • Page 380 9469300995 Rev D DPF Status and Pre-Alarms The DGC-2020HD receives DPF status information which is broadcast from the engine ECU in various Parameter Group Numbers (PGN) and Suspect Parameter Numbers (SPN). This information is displayed on the front panel and in BESTCOMSPlus, via DPF related pre-alarms. The J1939 parameters and the resulting DGC-2020HD pre-alarms are summarized in the following paragraphs.

  • Page 381: Exhaust After-Treatment Systems (Eats)

    Reagent Tank 2 Information. Tank levels are in units of percent. Pre-Alarms Diesel Exhaust Fluid Level diagnostics are sent to the DGC-2020HD from the ECU as SPNs 5245 and 5246 in PGN 65110 (the AT1TI PGN). Suspect Parameter Number 5245 communicates DEF level diagnostics, whereas SPN 5246 communicates DEF Inducement Level status.
  • Page 382 With Service Tool Clearing: Invoke 0% torque reduction with service tool clearing until proper DEF level and quality evaluation. If low level or poor DEF quality is detected during the next monitoring cycle, the severe inducement will be active after the next restart. Exhaust Treatment DGC-2020HD...

  • Page 383: Troubleshooting

    9469300995 Rev D Troubleshooting If you do not get the results that you expect from the DGC-2020HD, first check the programmable settings for the appropriate function. Use the following troubleshooting procedures when difficulties are encountered in the operation of your genset control system.
  • Page 384 Figure 234. Device Manager Step 3. In the Properties windows, select the Driver tab and click Update Driver. See Figure 235. Figure 235. DGC-2020HD Properties Step 4. Select Browse My Computer for Driver Software as shown in Figure 236. Troubleshooting...
  • Page 385 9469300995 Rev D Figure 236. Update Driver Software - DGC-2020HD Step 5. Click Browse and navigate to C:\Program Files\Basler Electric\USB Device Drivers\USBIO. Click Next. See Figure 237. Figure 237. Update Driver Software - DGC-2020HD Step 6. If a Windows Security window (Figure 238) appears, click Install.
  • Page 386 Check to determine if there are multiple ECUs on the engine. If so, consult the engine manufacturer’s documentation to determine the CAN Bus 2 address of the ECU that will respond to rpm requests. Set the Engine ECU Address setting under the CAN Bus 2 (ECU) Troubleshooting DGC-2020HD...

  • Page 387: Inputs And Outputs

    Use a voltmeter connected between the BATT– terminal (P4-49) and the sender negative terminals on the DGC-2020HD to verify that there is no voltage difference at any time. Any voltage differences may manifest themselves as erratic sender readings. Wiring should be corrected so that no differences exist.

  • Page 388: Ground Faults Detected In Ungrounded System Applications

    Verify that all wiring is properly connected. Refer to the Typical Applications chapter in the Installation manual. Step 2. Ensure that the proper current is present at the DGC-2020HD current sensing inputs 1, 2, 3, 4, 5, and 6. Step 3.

  • Page 389: Generator Breaker Does Not Open When It Should

    • The DGC-2020HD itself when the automatic mains fail transfer (ATS) feature is enabled. • The DGC-2020HD itself when the Run with Load logic element receives a Start pulse in the programmable logic. • The DGC-2020HD itself when started from the Exercise Timer and the Run with Load box is checked in the Generator Exerciser settings.

  • Page 390: Mains Breaker Does Not Open When Mains Fails

    Metering Explorer in BESTCOMSPlus and verify that the Mains Failed status LED is lit when the power on the DGC-2020HD bus voltage input is either out of voltage or frequency range. If necessary, modify the settings on the Settings, Breaker Management, Bus Condition screen to achieve correct detection.

  • Page 391: Synchronizer

    Initiate a breaker close request by one of the methods listed in the Breaker Management chapter. Step 3: Check for raise and/or lower pulses coming from the DGC-2020HD if the governor or AVR bias control output type is contact. Step 4: Check the governor and/or AVR bias analog outputs on the DGC-2020HD with a volt meter if the governor or AVR bias control output type is analog.

  • Page 392: Speed Bias

    Load Anticipation Large Frequency Overshoot on Recovery Kla Gain may be too high and GOV output may be saturated. See Figure 240. Navigate to Settings, Bias Control Settings, Governor Bias Control Settings and decrease Load Anticipation, Kla Gain. Troubleshooting DGC-2020HD...
  • Page 393 Control Settings, Governor Bias Control Settings and decrease Load Anticipation, Tla Washout Filter Constant. Figure 241. Tla Too High Causing Recovery Overshoot Poor Recovery Kla Gain may be too low. See Figure 242. Navigate to Settings, Bias Control Settings, Governor Bias Control Settings and increase Load Anticipation, Kla Gain. DGC-2020HD Troubleshooting...

  • Page 394: Voltage Bias

    Generator Voltage Does Not Change When Voltage Bias Changes As a test, you can force a fixed voltage on the AVR bias output by setting the Min Output Voltage and Max Output Voltage to the same value by navigating to Settings, Programmable Outputs, Analog Output Troubleshooting DGC-2020HD...

  • Page 395: Load Sharing

    If the input status is correct, but the Gen Breaker status under Metering, Status, Bus Condition, Gen is not, check the PLC logic, and verify that the Gen Breaker fed into the DGC-2020HD is tied in logic to the Status input on the Gen Breaker logic element.
  • Page 396 Step 2: Verify generator breaker status is being correctly received as described in Generator Breaker Status is not being received by the DGC-2020HD. If the status is correct, proceed to Step 3. Step 3: Check the Load Share Line operating voltage range by examining the Min. and Max. Voltage parameters found in BESTCOMSPlus®...

  • Page 397: Group Start And Group Stop Requests

    Step 10: If it appears that something is driving the load share line but it is not the DGC-2020HD on one of the non-running units, search for an external device that is driving or loading down the load share lines.

  • Page 398: Dgc-2020Hd Front Panel Diagnostics Screens

    DGC-2020HD Front Panel Diagnostics Screens There are several diagnostic screens in the DGC-2020HD that can be useful for debugging load sharing issues and I/O module related issues. The following debug screens are available: Load Share Line, Control, AEM-2020, CEM-2020, VRM, Mains Power and VRM Control.
  • Page 399 To Mains logic element is true, the Watt Demand will be equal to the base load set point. When the generator breaker is open or the kW controller is disabled, the Watt Demand will always be equal to the value calculated from the voltage that the DGC-2020HD sees on its load share line. •...
  • Page 400 Ramp Status: This indicates the current kvar ramp direction as None, Up, or Down. • var Ramp Demand: This is the normalized var demand that is ramped from the initial var loading upon generator breaker closure to the desired var output. The rate at which the ramp occurs is Troubleshooting DGC-2020HD...
  • Page 401 Volt Error: This is the normalized difference between the measured generator voltage and the voltage to which the DGC-2020HD is trying to synchronize. It will be 0.00 at all times except when the DGC-2020HD is trying to synchronize its generator inputs to its bus input. When synchronizing, this will typically be 0.000 or some relatively small number and move a small...

  • Page 402: Mains Power

    9469300995 Rev D • DGC To AEM BP: DGC-2020HD to AEM-2020 Binary Points. This is a 32-bit, bit packed number representing the binary points transmitted from the DGC-2020HD to the AEM-2020. Debug at this level is not necessary. • AEM To DGC BP: AEM-2020 to DGC-2020HD Binary Points. This is a 32-bit, bit packed number representing the binary points transmitted from the AEM-2020 to the DGC-2020HD.
  • Page 403 This screen is useful for debugging VRM-2020 control related issues. It gives visibility into the states of the VRM-2020 regulation modes and limiters in the DGC-2020HD. The VRM Control diagnostics screen is located on the front panel at Metering > Diagnostics > VRM Control.
  • Page 404 9469300995 Rev D Troubleshooting DGC-2020HD...

  • Page 405: Bestcomsplus Settings Loader Tool

    When BESTCOMSPlus installation is complete, a Basler Electric folder is added to the Windows programs menu. This folder is accessed by clicking the Windows Start button and then accessing the Basler Electric folder in the Programs menu. The Basler Electric folder contains an icon that starts the BESTCOMSPlus Settings Loader Tool.

  • Page 406: Bestcomsplus Settings Loader Tool Settings

    One entry, or row, in the Loader Grid contains all of the necessary data to associate a product settings file with a bar code. New entries can be added. Existing entries can be edited, deleted, and uploaded to a Basler product. Figure 244. Loader Grid Scanning Bar Codes Place the cursor in the text field, found at the top of the Loader Grid screen, and scan a bar code.

  • Page 407: Configuration Settings

    Select an entry and click Upload. A dialog appears which provides connection options for the appropriate type of device. Refer to the Basler product instruction manual for detailed connection information. Once a connection is established, the product settings associated with the entry are uploaded.
  • Page 408 Figure 246. Configuration, Settings Files Tab Connection Options Connection options consist of the three selections described below. Refer to the Basler product instruction manual for detailed connection information. Always Prompt for Connection: When enabled, a dialog appears which provides connection options for the appropriate type of device each time a connection attempt is made.

  • Page 409: General Operation

    Scan bar code. Settings file is automatically highlighted and isolated in the grid. Click Upload. BESTCOMSPlus Settings Loader Tool automatically connects to device and uploads settings. Device connection is automatic unless “Always prompt for connection” is enabled. DGC-2020HD BESTCOMSPlus Settings Loader Tool...
  • Page 410 9469300995 Rev D BESTCOMSPlus Settings Loader Tool DGC-2020HD...

  • Page 411: Revision History

    9469300995 Rev D Revision History Table 102 provides a historical summary of the changes made to the DGC-2020HD hardware. Application firmware changes are listed in Table 103 and BESTCOMSPlus® changes are listed in Table 104. The corresponding revisions made to this instruction manual are summarized in Table 105. Revisions are listed in chronological order.
  • Page 412 Added Engine ECU Address setting to specify which ECU to correspond with when multiple ECUs are detected on the network • Added support for Volvo EMS2.3 Tier 4 SCR Exhaust System parameter annunciation via proprietary J1939 PGN • Added configurable math functions Revision History DGC-2020HD...
  • Page 413 Display, and Pre-Alarm annunciation Display on the Overview Screen • Added a setting to allow user to modify the domain name used in emails from Basler products • Added more setpoint adjustment capability to volt trim, speed trim, kW, var, and PF controllers •...
  • Page 414 • 3.08.02, Mar-15 Minor regional settings improvement • 3.09.00, Apr-15 Added support for firmware version 1.01.00 (see firmware revision history above) • Analysis view updated with support for 6 plots • 3.10.00, Oct-15 Maintenance release (DECS-150 launch) Revision History DGC-2020HD...
  • Page 415 • Corrected descriptions for Mains fail status inputs: Power from Gens, Transferring to Mains, and Power from Mains. • Removed “LCD is blank and all LEDs are flashing…” from Troubleshooting chapter. DGC-2020HD Revision History...
  • Page 416 9469300995 Rev D Revision History DGC-2020HD...
  • Page 418 Highland IL 62249-1074 USA Suzhou Industrial Park 15-06 Peninsula Plaza Tel: +1 618.654.2341 215122 Suzhou Singapore 179098 Fax: +1 618.654.2351 P.R. CHINA Tel: +65 68.44.6445 email: info@basler.com Tel: +86 512.8227.2888 Fax: +65 68.44.8902 Fax: +86 512.8227.2887 email: singaporeinfo@basler.com email: chinainfo@basler.com...

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