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Littelfuse PGR-8800 Manual

Arc-flash relay
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Arc-Flash Relay
PGR-8800
PGR-8800
ARC-FLASH RELAY
REVISION 3-D-052923
Document Number: PM-1400-EN
www.littelfuse.com
• © 2023 Littelfuse •
•
1/98

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Summary of Contents for Littelfuse PGR-8800

  • Page 1 Arc-Flash Relay PGR-8800 PGR-8800 ARC-FLASH RELAY REVISION 3-D-052923 Document Number: PM-1400-EN www.littelfuse.com • © 2023 Littelfuse • • 1/98...
  • Page 2 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 This page intentionally left blank. www.littelfuse.com • © 2023 Littelfuse • • 2/98...

  • Page 3: Table Of Contents

    7 DIGITAL INPUTS ......................23 Inhibit ........................23 Trip .......................... 23 Reset ........................23 Circuit Check ......................23 8 OUTPUTS ........................24 Online ........................24 Service ........................25 Tripped ........................25 Trip Coil ........................27 www.littelfuse.com • © 2023 Littelfuse • • 3/98...
  • Page 4 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 9 LED INDICATION ......................29 10 PGR-8800 BUTTONS ....................29 10.1 Mode ........................32 10.2 Trip .......................... 32 10.3 Reset ........................32 10.4 Mode + Reset ......................32 10.5 Mode + Trip ......................32 11 LINK ..........................33 11.1...
  • Page 5 C.2 Application and Configuration ..................80 C.2.1 Single PGR-8800 Configuration ..............80 C.2.2 Dual PGR-8800 Configuration using Link Interface ........84 C.2.3 Single PGR-8800 Configuration with Current Sensor Input ......85 C.2.4 Dual PGR-8800 Configuration using Link Interface and Current Sensor Input ..................90 C.2.5 Configuration of Multiple Inputs and Outputs ..........
  • Page 6 LED Flash Patterns ..................... 29 C.1 Single PGR-8800 Application ..................81 C.2 Dual PGR-8800 Configuration using Link Interface ............. 84 C.3 Single PGR-8800 Configuration with Current Sensor Input ......... 86 C.4 Dual PGR-8800 Configuration using Link Interface and Current Sensor Input ....................90 C.5 Tripping Common Upstream Circuit Breaker from Several Zones...

  • Page 7: Introduction

    There are inputs for six optical sensors and three current sensors. On the occurrence of an arc fault, the PGR-8800 detects the fault and pulses the trip contact in less than one millisecond. The tripping pulse is typically used to trip the circuit breaker(s) supplying the circuit.

  • Page 8: Usb Interface

    No PC driver or software installation is required. 1.6 Scalable System Up to four PGR-8800 modules can be connected into a single system, allowing a total of 24 optical sensors per system. Each PGR-8800 can be programmed to have up to 4 independent trip zones, providing flexibility to fit various tripping schemes on larger systems.

  • Page 9: Installation

    Rev. 3-D-052923 INSTALLATION The PGR-8800 can be surface mounted using four 5-mm (10-32) screws, or it can be DIN-rail mounted using the optional mounting brackets (PGA-0031). Ensure there is enough clearance around the module to allow the plug-in terminals to be removed and inserted.

  • Page 10: Pgr-8800 Typical Wiring Diagram

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 FIGURE 2. PGR-8800 Typical Wiring Diagram. www.littelfuse.com • © 2023 Littelfuse • • 10/98...

  • Page 11: Pgr-8800 24-Vdc Source Typical Wiring Diagram

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 FIGURE 3. PGR-8800 24-Vdc Source Typical Wiring Diagram. www.littelfuse.com • © 2023 Littelfuse • • 11/98...

  • Page 12: Power Supply

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 POWER SUPPLY The PGR-8800 Arc-Flash Relay can be powered from an ac or dc supply, or both. However, only one source can be connected to terminals 31 and 32. 3.1 AC Supply Connect an ac supply to terminals 31 and 32. The supply voltage must be 100 to 240 Vac.

  • Page 13: Low-Voltage Dc Supply

    Panasonic VRLA LC-R122R2P, should be used and exchanged regularly according to the manufacturer’s recommendations. If the PGR-8800 is supplied by the backup battery and the battery voltage drops below 20 V, the PGR-8800 will shut down to protect the battery.

  • Page 14: Optical Sensors

    Rev. 3-D-052923 OPTICAL SENSORS The PGR-8800 has one local sensor and six inputs for external optical sensors. The local sensor is primarily used for commissioning and can also be enabled for arc-flash protection. Its light-detection zone is illustrated in the diagram below.

  • Page 15: Pga-Ls10 Photoelectric Point Sensor With Sensor Check

    This sensor has a detection area of a 2-m (7 ft) half-sphere for arcs of 3 kA or more. A built-in LED enables the PGR-8800 to verify the function of the light sensor, wiring, and electronics. If the sensor does not detect the sensor-check LED, a sensor-fail alarm will occur -- the ONLINE output will change state and the ONLINE LED will begin to short flash.

  • Page 16: Pga-Ls10 Connection

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 4.1.1 PGA-LS10 Connection FIGURE 6. PGA-LS10 Connection Diagram. www.littelfuse.com • © 2023 Littelfuse • • 16/98...

  • Page 17: Pga-Ls10 Installation

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 4.1.2 PGA-LS10 Installation The PGA-LS10 point sensor includes an adhesive-backed drill template for easy surface or panel- mount installation. FIGURE 7. PGA-LS10 Mounting Detail. www.littelfuse.com • © 2023 Littelfuse • • 17/98...

  • Page 18: Pga-Ls20 And Pga-Ls30 Fiber-Optic Sensor With Sensor Check

    The PGA-LS20 and PGA-LS30 have a 360° detection zone along the fiber’s length. A built-in LED enables the PGR-8800 to verify the function of the light sensor, wiring, and electronics. If the sensor does not detect the sensor-check LED, a sensor-fail alarm will occur -- the ONLINE output will change state and the ONLINE LED will begin to short flash.

  • Page 19: Pga-Ls20 And Pga-Ls30 Connection

    – a faulty sensor could be falsely detected as continuous. However, if there is no sensor fault, arc- flash detection will function normally in this condition. FIGURE 8. PGA-LS20 and PGA-LS30 Connection Diagram www.littelfuse.com • © 2023 Littelfuse • • 19/98...

  • Page 20: Sensor Placement

    If the LED on the sensor or relay isn’t indicating a trip, cleaning is necessary. Note that in service mode, the PGR-8800 will not trip if an arc flash occurs.

  • Page 21: Current Sensors

    Current detected by a current sensor exceeds the inhibit threshold. The PGR-8800 will trip after the programmed delay time for the light as soon as the absolute value of the current on any phase exceeds the inhibit setting. Thus, the current inhibit does not add any delay to the trip if the arc is drawing current.

  • Page 22: Current Sensor Characteristics

    The PGR-8800 measures instantaneous currents and is insensitive to phasing and polarity. The current-sensor inputs have a burden of less than 0.25 VA at 5 A, will withstand up to 75 A for one second, and are isolated from all other terminals up to 500 Vac.

  • Page 23: Digital Inputs

    There are two INHIBIT inputs: terminals 39 and 40. When inhibit is activated, the PGR-8800 will indicate that an arc fault is being detected, but will not pulse the trip-coil output. If the PGR-8800 detects an arc fault while inhibited, the sensor LED and INHIBIT LED will flash.

  • Page 24: Outputs

    A normally-open status contact, STO (terminal 49) with reference to COM (terminal 45) When the ONLINE output function is set to Indicate Online Operation, the ONLINE output is energized unless the PGR-8800: detects an optical sensor fault, detects a cable fault on a digital input if cable monitoring is activated in the configuration...

  • Page 25: Service

    A normally-open status contact STS (terminal 53) with reference to COM (terminal 45) When the SERVICE output function is set to Indicate Service mode, the SERVICE output signals that the PGR-8800 is being commissioned or set up. The output is energized when the PGR-8800: is in service mode, or...
  • Page 26 When the TRIPPED output function is set to Indicate that the unit tripped, the TRIPPED output will energize if the PGR-8800 detects a fault during regular operation or in service mode. When the TRIPPED output function is set to Trip Zone:...
  • Page 27 NOTE: The TRIP COIL output functions as a momentary switch and is protected against thermal overload. It will gradually lower the time the trip coil is active if the PGR-8800 is tripped repeatedly. By default, when the PGR-8800 is in service mode, the TRIP COIL output will not operate when an arc-flash or overcurrent trip occurs, but it will operate when the TRIP button is pressed for at least one second.

  • Page 28: Led Flash Patterns

    INHIBIT input is active or current sensing is inhibiting trips (current not above setting) Fast red flashing The PGR-8800 detects an arc (light), but the INHIBIT input or current sensing is preventing a trip Short red flashing Digital-input circuit check failed; check the wiring of the inputs, or use the...

  • Page 29: Trip Coil

    PGR-8800 is off or in service mode SERVICE On, red PGR-8800 is in service mode. Please note it will switch to and stay in service mode if a USB cable and PC are connected. In service mode, the TRIP COIL output can be activated from the front-panel TRIP button but not by an arc fault, overcurrent, or TRIP input, unless configured to trip in service mode.
  • Page 30 Online mode. The front-panel sensor is configured for use as a trip sensor The LED may also indicate that the PGR-8800 is powering up if it is the only lit LED. If this condition remains for an extended period, it indicates unit error Slow green flashing If the SERVICE LED is also flashing, the PGR-8800 is awaiting manual confirmation of the connected sensors.

  • Page 31: Pgr-8800 Buttons

    Rev. 3-D-052923 PGR-8800 BUTTONS 10.1 Mode The MODE button switches the PGR-8800 between online and service mode. 10.2 Trip In service mode, when the TRIP button is pressed for more than one second, the TRIP COIL output is activated. In online mode, the TRIP button is disabled.

  • Page 32: Link

    When a PGR-8800 is configured for the Link function, the front buttons can be shared with all modules in the system or set to apply only to the local module. For example, if one PGR-8800 is set to service mode and Link user interface is enabled, all the linked modules will be placed in service mode.

  • Page 33: Modbus Communication

    RTU protocol is implemented in the PGR-8800, and allows up to four modules to be connected using a 2-wire TIA-485 bus. The PGR-8800 can also be connected to a local HMI or SCADA system. This will provide status information for sensors, analog inputs, digital inputs, digital outputs, and numerous event and error flags.

  • Page 34: Usb Interface

    12.1 Connecting to a PC The PGR-8800 requires supply voltage before connecting the USB cable. Although some LED’s may light when connecting a USB cable to an unpowered PGR-8800, the USB interface does not supply adequate power to allow proper operation.

  • Page 35: Configuration Software

    Rev. 3-D-052923 12.2 Configuration Software The configuration software for the PGR-8800 is located on the Configuration drive (the wrench icon). To run the software, open the Configuration drive in the PC file manager and double-click on the config.hta file. The program will open in Internet Explorer regardless of the default browser. The features of the software are outlined in subsequent sections of this manual.

  • Page 36: Configuration Software Buttons

    12.2.3 Default Configuration It is possible to use the basic protection features of the PGR-8800 without using the configuration software. Any connected optical sensors with circuit-check will be automatically detected and cause the relay to report an error if subsequently disconnected.

  • Page 37: General Settings

    Rev. 3-D-052923 12.2.4 General Settings System Name The system name can help identify the PGR-8800 (up to 25 characters) e.g. name and number of the switchboard section in which the unit is mounted. Date and Time This section will show the current date and time on the PGR-8800 and provides the option to synchronize with the connected PC.
  • Page 38 RESET button. Local Sensor The local sensor is located on the front of the PGR-8800 and is primarily intended for commissioning of sensors. The configuration software allows a 25-character description. The local sensor can also be used to trip the circuit breaker if the checkbox is marked.

  • Page 39: Current-Sensor Settings

    The current sensor ratio must also be defined. The PGR-8800 only accepts current sensors with a 5-A-secondary current. The accuracy of the reading is 1 A (current-sensors-secondary current). Due to the fast reaction time of the PGR-8800 to an arc flash, it is important to set all levels and time delays with this in mind.
  • Page 40 If light is detected by the optical sensors but the current is below the Trip Inhibit setting, the PGR-8800 will not trip. This value is adjustable from 10 to 1,000% of the rated nominal load current. This feature is disabled by default. See Section 6.
  • Page 41 Inhibit Inputs function selection. When the PGR-8800 sends a trip signal to the local circuit breaker, the status of the circuit breaker can be monitored using the Trip input. In the case of a local circuit breaker failure, the PGR-8800 can be configured to trip an upstream circuit breaker.

  • Page 42: Output Settings

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 12.2.8 Output Settings 12.2.8.1 Online Output The Online output function can be configured in several ways. The default setting is Indicate Online Operation. See Section 8.1 for more details. www.littelfuse.com • © 2023 Littelfuse • • 42/98...

  • Page 43: Service Output

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 12.2.8.2 Service Output www.littelfuse.com • © 2023 Littelfuse • • 43/98...
  • Page 44 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 The Service output function can be configured in several ways. See Section 8.2 for more details. www.littelfuse.com • © 2023 Littelfuse • • 44/98...

  • Page 45: Tripped Output

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 12.2.8.3 Tripped Output The Tripped output function can be configured in several ways. See Section 8.3 for more details. www.littelfuse.com • © 2023 Littelfuse • • 45/98...
  • Page 46 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 www.littelfuse.com • © 2023 Littelfuse • • 46/98...

  • Page 47: Trip Coil Output

    For more information on trip-coil operation, see Section 8.4. By default, the PGR-8800 does not send a trip signal when in service mode because this mode can be used for verifying sensor operation. Service-mode tripping can be selected by the Trip in service www.littelfuse.com...
  • Page 48 When the Trip Coil output function is set to Trip Zone, only the selected Light Sensors will trip this zone. The Trip Coil Output Type can be set to Pulsed or Continuous. The Output Operating Mode can be set to Fail-safe or Non-fail-safe mode. www.littelfuse.com • © 2023 Littelfuse • • 48/98...
  • Page 49 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 www.littelfuse.com • © 2023 Littelfuse • • 49/98...

  • Page 50: Communications Settings

    Rev. 3-D-052923 12.2.9 Communications Settings Link Interface The Link input on the PGR-8800 (terminals 37, 38) is a multi-function communications port. The port is disabled by default and can be configured as follows through the Link Interface drop-down list: Nothing Disable communications port.
  • Page 51 Rev. 3-D-052923 Link Configuration Up to four PGR-8800’s can be linked in this mode, but each must be given a unique Unit address and the total Number of linked units in the system must be configured in all linked units.
  • Page 52 Allow writes via MODBUS is disabled by default. Network Termination Since the PGR-8800 Modbus interface shares the Link interface, the network is already terminated internally. This limits the number of units which can be connected, and the maximum length of the connection.

  • Page 53: Advanced Settings

    The data logging feature is enabled by default (v1.03.16 or newer). Waveform capture can also be enabled. If the PGR-8800 will be connected in an application where tripping results in a loss of supply power, use of a backup battery supply is recommended but not required when using data logging.

  • Page 54: About Tab

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 12.2.11 About Tab The About tab displays general information about the PGR-8800 such as the last time the configuration was saved, the firmware revision number, hardware revision number, and serial number. 12.3 Data Log Drive The PGR-8800 can log all significant events including trips, errors and button presses.
  • Page 55 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 www.littelfuse.com • © 2023 Littelfuse • • 55/98...

  • Page 56: Firmware Upgrade

    Rev. 3-D-052923 12.4 Firmware Upgrade NOTE: The PGR-8800 will restart during the firmware upgrade process. Ensure the equipment is in a safe state prior to starting the upgrade process. Do not interrupt the firmware upgrade process. Product information, including hardware and firmware details, can be reviewed in the About tab as shown in Section 12.2.11.

  • Page 57: Commissioning

    The PGR-8800 will detect sensors on power up and report if they disappear, but in most installations it is advantageous to store the sensor configuration permanently. This is easily done by configuring the installed sensors either via USB as shown above or with the method described below.

  • Page 58: Testing The Trip Coil

    2. If necessary, press MODE to switch to online mode (ONLINE LED will be solid green). 3. Confirm that there is a solid PGR-8800 green LED for each connected optical sensor. This confirms that sensors are connected and healthy.

  • Page 59: Light Sensitivity Adjustment

    In some cases, a photo flash with a guide number of 15 m (49 ft) or larger can be used. Use the following procedure to calibrate the sensor: 1. Switch the PGR-8800 to service mode by pressing the MODE button. The red SERVICE LED will light.

  • Page 60: Sensor Adjustment In Small Compartments

    3. Set the TRIP LEVEL to 9 on the PGR-8800. 4. Place the lamp facing the local sensor on the PGR-8800 at the same distance as measured in step 2.

  • Page 61: Specifications

    4.0 V at 10 A, 25˚C (77˚F) Output Relays: Main Relays: Online, Service, Tripped Contact Configuration: Change-over (Form C) UL Contact Rating: 5 A Resistive, 250 Vac 5 A Resistive, 30 Vdc www.littelfuse.com • © 2023 Littelfuse • • 61/98...
  • Page 62 100 mA secondary Isolation: 500 Vac Local Interface: USB 1.1 Communications Interface: Protocol: Modbus ® Configuration: TIA-485 Isolated, 2-wire multi-drop Bus Length: 10 m (32.8 ft) Cable: Shielded twisted pair, Belden 3105A or equivalent www.littelfuse.com • © 2023 Littelfuse • • 62/98...
  • Page 63 Below 2,000 m (6,500 ft): Normal Operation Above 2,000 m (6,500 ft): 24 Vdc supply only, shunt trip only Above 4,000 m (13,000 ft): Contact Littelfuse for further information. EMC Tests: Verification tested in accordance with EN60255-26:2009. 1 MHz Burst: IEC 60255-22-1 ±...
  • Page 64 100% Interrupts 3 x for 5 ms, 10 ms, 20 ms, 50 ms, 100 ms, 200 ms Vibration: IEC 60255-21-1 (Vibration, shock, and seismic) Safety: IEC 61010-1: 2010 3 Edition Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part I www.littelfuse.com • © 2023 Littelfuse • • 64/98...

  • Page 65: Sensors

    32 x 56 x 19 mm (1.3 x 2.2 x 0.7 in) Enclosure: IP 30 IP 30 PGR-8800 uses the open source components FreeRTOS and FreeMODBUS internally. For license, version, and source-code information please contact opensource@littelfuse.com. www.littelfuse.com • © 2023 Littelfuse • •...

  • Page 66: Ordering Information

    Littelfuse will (at Littelfuse option) repair, replace, or refund the original purchase price of a PGR- 8800 that is determined by Littelfuse to be defective if it is returned to the factory, freight prepaid, within the warranty period. This warranty does not apply to repairs required as a result of misuse, negligence, an accident, improper installation, tampering, or insufficient care.

  • Page 67: Appendix A Pgr-8800 Modbus Rtu Protocol

    APPENDIX A PGR-8800 MODBUS RTU PROTOCOL A.1 PROTOCOL The MODBUS RTU protocol is implemented in the PGR-8800, and allows up to four modules to be connected using a 2-wire TIA-485 bus. The MODBUS interface will provide status information for sensors, analog inputs, digital inputs, digital outputs, and numerous event and error flags. It also provides the ability to remotely reset the PGR-8800.

  • Page 68: Function Codes Supported

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 A.4 FUNCTION CODES SUPPORTED The PGR-8800 Modbus Protocol supports the following function codes: Read Holding registers (Function code 3) Read Input registers (Function code 4) Write Single register* (Function code 6) Read Slave ID (Function code 11)

  • Page 69: Write Multiple Registers (Code 16)

    The slave will reply with the slave address, function code, register address, and the quantity followed by the CRC code for a total of eight bytes. A.4.3 Exception Responses The PGR-8800 will return appropriate error codes as per the standard for malformed or out-of-range requests. A.5 PGR-8800 DATABASE Appendix B contains the Modbus Registers in the Communications Database Table.

  • Page 70: Appendix B Modbus Communications Database Table

    Status of Sensor 2 Read Only 40503 Status of Sensor 3 Read Only 40504 Status of Sensor 4 Read Only 40505 Status of Sensor 5 Read Only 40506 Status of Sensor 6 Read Only www.littelfuse.com • © 2023 Littelfuse • • 70/98...
  • Page 71 Trip button long press Read Only 1519 41519 Reset button Read Only 1519 41520 Reset button long press Read Only 1520 41521 Link trip Read Only 1521 41522 Link command inhibit Read Only www.littelfuse.com • © 2023 Littelfuse • • 71/98...
  • Page 72 Read Only 1603 41604 Sensor 3 Read Only 1604 41605 Sensor 4 Read Only 1605 41606 Sensor 5 Read Only 1606 41607 Sensor 6 Read Only 1607 41608 Sensor front Read Only www.littelfuse.com • © 2023 Littelfuse • • 72/98...
  • Page 73 Read Only relay 1653 41654 Local CB tripped via Service relay Read Only 1654 41655 Local CB tripped via Tripped relay Read Only 1655 41656 Link alarm sent due to Light Read Only www.littelfuse.com • © 2023 Littelfuse • • 73/98...
  • Page 74 Read Only 1739 41740 Error IGBT missing voltage Read Only 1740 41741 Error sensor power failure Read Only 1741 41742 Link command error Read Only 1742 41743 Link command setup Read Only www.littelfuse.com • © 2023 Littelfuse • • 74/98...
  • Page 75 T12: Reading: 0=Inactive; 1=Active; 2=Cable Broken. T13: Reading: 0=Inactive; 1=Active; 2=Cable Broken; Writing: 1=Reset trip (self-resets), writing only allowed if explicitly enabled in configuration. T14: Reading: 0=Open; 1=Closed. T15: Reading: 0=Inactive; 1=Active. www.littelfuse.com • © 2023 Littelfuse • • 75/98...

  • Page 76: Appendix C Coordinated Tripping Of Upstream Breakers

    C.1.2 Current Sensor Detection The PGR-8800 current sensors can also be used to detect phase currents to verify if the local circuit breaker has operated as expected. See Section C.2.3 for a programming and wiring example. C.1.3 Total Clearing Time Several parameters are needed to estimate the total clearing time of a local and upstream circuit breaker.

  • Page 77: Circuit Breaker Operating Time

    Section C.2.1 for a programming and wiring example. C.1.5 Link Output The Link feature can be configured to trip an upstream PGR-8800. This uses the solid state high- speed trip coil output, which eliminates the delay from the mechanical relay. See Section C.2.2 for a programming and wiring example.

  • Page 78: Pga-1100 Diode Logic Unit

    Rev. 3-D-052923 C.1.6 PGA-1100 Diode Logic Unit When several PGR-8800 protected zones are used and a common upstream circuit breaker should be tripped if any of the downstream zones experience a local clearing failure, the upstream circuit breaker may run out of inputs. The PGA-1100 Diode Logic Unit makes it possible to combine several trip outputs to the common circuit breaker.
  • Page 79 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 FIGURE C.1. Single PGR-8800 Configuration. In this application, a circuit breaker with an auxiliary contact provides a trip input signal. The configuration software displays two warnings to configure a digital input as a feedback signal from the circuit breaker auxiliary contact and to configure a relay output to trip an upstream circuit breaker.
  • Page 80 Select CB is closed when low (switch closed). When Trip Input T1 or T2 (terminal 41 and 42 respectively) is connected to Common (terminal 45), the monitored circuit breaker is determined to be closed. This will remove the warning message and the configuration can be saved. www.littelfuse.com • © 2023 Littelfuse • • 80/98...
  • Page 81 Ensure the delay time for the local circuit breaker is set correctly for the circuit breaker type. The default is a 2-cycle circuit breaker delay. See Section C.1.3.2 for instructions on how to determine the circuit breaker operating time. www.littelfuse.com • © 2023 Littelfuse • • 81/98...

  • Page 82: Dual Pgr-8800 Configuration Using Link Interface

    The local circuit breaker auxiliary contact feedback is configured as in Section C.2.1. Configure the local PGR-8800 to use the Link Interface. The unit address must be unique, and the number of linked units in the system must be configured.

  • Page 83: Single Pgr-8800 Configuration With Current Sensor Input

    The unit controlling the upstream circuit breaker is configured to receive a link alarm. The upstream PGR-8800 is configured to send a Link alarm signal, but in the current configuration, this has no effect as the local PGR-8800 is not configured to receive the Link alarm.

  • Page 84: Single Pgr-8800 Configuration With Current Sensor Input

    PGR-8800 Arc-Flash Relay Rev. 3-D-052923 FIGURE C.3. Single PGR-8800 Configuration with Current Sensor Input. NOTE: In this application, it is important that the current sensors are placed so that they only monitor current flowing through the local circuit breaker section. Otherwise, the upstream circuit breaker could trip even though the local circuit breaker cleared the fault.
  • Page 85 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 The warning message refers to the output method, which has not yet been configured. Select the Detect clearing failure by current checkbox. www.littelfuse.com • © 2023 Littelfuse • • 85/98...
  • Page 86 Rated nominal load current and CT transformation ratio should be set correctly. The rest of the setup does not influence the clearing failure function. The relay output is configured as described in Section C.2.1. The warning message will disappear after selecting an output. www.littelfuse.com • © 2023 Littelfuse • • 86/98...

  • Page 87: Dual Pgr-8800 Configuration Using Link Interface And Current Sensor Input

    The single line diagram in Fig. C.4 shows an incoming feeder with a circuit breaker, a bus bar, and a zone protected with an upstream PGR-8800. The upstream circuit breaker can be tripped in the event of a local circuit breaker failure.
  • Page 88 The Rated Nominal load current and CT transformation ratio should be set correctly. The rest of the setup does not influence the clearing failure function. Configure the local PGR-8800 to use the Link Interface. The unit address must be unique, and the number of linked units in the system must be configured.
  • Page 89 PGR-8800 Arc-Flash Relay Rev. 3-D-052923 The Received Link alarm signal trips this unit is not selected. This makes it possible to have several downstream units trip a common upstream unit without tripping each other. www.littelfuse.com • © 2023 Littelfuse • • 89/98...

  • Page 90: Configuration Of Multiple Inputs And Outputs

    The unit controlling the upstream circuit breaker is configured to Receive Link alarm signal trips this unit. The upstream PGR-8800 is configured to send a Link alarm signal, but in the current configuration, this has no effect as the other downstream units are not configured to receive the Link alarm.

  • Page 91: Tripping Common Upstream Circuit Breaker From Several Zones Using

    PGR-8800 through a PGA-1100 Diode Logic Unit. The tie breaker trip coil is also connected to the trip coil of each PGR-8800 through a separate PGA-1100. If a trip occurs at either PGR-8800, both the tie circuit breaker and the corresponding circuit breaker will trip.

  • Page 92: Appendix D System Parameters And Setup Record

     No sensor expected  Sensor expected Sensor 6 Sensor description Sensor 6 Ignore sensor check errors Disabled  Enabled Disabled  No change Change configuration No change  No sensor expected  Sensor expected www.littelfuse.com • © 2023 Littelfuse • • 92/98...
  • Page 93  Enabled Disabled Reset Inputs  Reset when low (switch closed)  Reset when low with circuit Reset when low (switch Function check closed)  Reset when not low (switch open)  Disabled www.littelfuse.com • © 2023 Littelfuse • • 93/98...
  • Page 94 Zone only)  Sensor 5  Sensor 6 Trip Input trips this zone (Trip Zone Enabled  Enabled Disabled only) Link Trip trips this zone (Trip Zone Enabled  Enabled Disabled only) www.littelfuse.com • © 2023 Littelfuse • • 94/98...
  • Page 95 Return to ONLINE mode when Disabled  Enabled Disabled USB is unplugged Trip in Service mode Disabled  Enabled Disabled Logging Enable data logging Enabled  Enabled Disabled Enabled waveform capture Disabled  Enabled Disabled www.littelfuse.com • © 2023 Littelfuse • • 95/98...
  • Page 96 Reset configuration drive to factory Disabled  Enabled Disabled default Reset log drive to factory default Disabled  Enabled Disabled Configuration Reset configuration to factory Disabled  Enabled Disabled defaults NOTES: Firmware reference 1.03.16. www.littelfuse.com • © 2023 Littelfuse • • 96/98...
  • Page 97 Updated ordering information. Removed PGA-LS25 sensor. Revision 3-A-112913 Section 3 Updated power supply information. Section 4 Updated Figs. 6 and 8. Section 14 Added EMC test specifications. Section 15 Updated ordering information. www.littelfuse.com • © 2023 Littelfuse • • 97/98...
  • Page 98 Added optical sensor sensitivity mode. Firmware Revision 1.03.13 Added additional Tripped Output functions. Firmware Revision 1.03.10 Added Internet Explorer support in event viewer. Firmware Revision 1.03.09 Removed trip terminal from Link Sharing. www.littelfuse.com • © 2023 Littelfuse • • 98/98...

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