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Satec System 295 Installation And Operation Manual

Powermeter & harmonic analyzer
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System 295
Powermeter &
Harmonic Analyzer
Installation and
Operation Manual
BG0130 Rev. A2

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Summary of Contents for Satec System 295

  • Page 1 System 295 Powermeter & Harmonic Analyzer Installation and Operation Manual BG0130 Rev. A2...
  • Page 2 SYSTEM 295 POWERMETER & HARMONIC ANALYZER Installation & Operation Manual...
  • Page 3 LIMITED WARRANTY The manufacturer offers the customer an 24-month functional warranty on the instrument for faulty workmanship or parts from date of dispatch from the distributor. In all cases, this warranty is valid for 36 months from the date of production. This warranty is on a return to factory basis.
  • Page 4 The secondary of an external current transformer must never be allowed to be open circuit when the primary is energized. An open circuit can cause high voltages, possibly resulting in equipment damage, fire and even serious or fatal injury. Ensure that the current transformer wiring is made through shorting switches and is secured using an external strain relief to reduce mechanical strain on the screw terminals, if necessary.
  • Page 5 This operating manual contains information required for installation and operation of the PM295. Information concerning the serial communications protocols is found in the documents: "System 295 Powermeter and Harmonic Analyzer - ASCII Communications Protocol - User's Guide" and "System 295 Powermeter and Harmonic Analyzer - Modbus Communications Protocol - User's Guide"...

  • Page 6: Table Of Contents

    Table of Contents 1. Introduction....................1 About The PM295 .................. 1 Instrument Features Summary ............... 1 Measurement Capabilities ..............5 2. Installation....................11 Initial Inspection ................... 11 Mechanical Installation................. 11 Input/Output Terminals................. 14 Power Source Connection ..............15 Voltage Input Connections ..............15 2.5.1 660V Input ....................
  • Page 7 3.3.16 Real Time Clock Setup................51 3.3.17 Date Format Setup ................. 53 3.3.18 Reset Functions..................53 3.3.19 Password Protection Control ..............54 Self-Test Diagnostics ................55 4. Operation Techniques ................56 Sampling Technique ................56 Measurement Modes................56 4.2.1 Real-time RMS Measurements..............56 4.2.2 Averaging ....................
  • Page 8 4.14 User Programmable Events ..............76 4.15 On-Board Data Recording ..............77 4.15.1 Event Logging..................79 4.15.2 Data Logging ..................80 4.15.3 High-speed Waveform Logging ............... 81 4.15.4 High-resolution Waveform Logging ............82 4.16 Monitoring And Recording Disturbances..........82 4.16.1 Disturbance Analysis................

  • Page 9: Introduction

    1. Introduction 1.1 About The PM295 The PM295 is an advanced microprocessor-based digital instrument that incorporates the capabilities of the network analyzer, data recorder and programmable controller allowing for user network monitoring, analysis and control. The instrument provides three-phase measurements of electrical quantities in power distribution systems, monitoring external events, operating external equipment via relay contacts, fast and long-term on-board recording of measured quantities and events, harmonic network analysis and disturbance recording.
  • Page 10 Discrete Inputs • 8 programmable optically isolated digital inputs free programmable for sensing external contacts’ status and pulses. Applications: monitoring external dry contacts sensing an external synchronization pulse for demand interval measurements counting external pulses connecting with external energy-counting meters triggering setpoints from external alarm/event sources selecting output values for internal multiplexed analog output Analog Outputs...
  • Page 11 Setpoints • 16 programmable setpoints for monitoring various events: up to 4 triggering conditions for each setpoint combined by OR/AND logical operations up to 4 actions for each setpoint on setpoint operation programmable hysteresis (dead-band) for analog triggers programmable delay for setpoint operation/release •...
  • Page 12 16 programmable data logging partitions, each for recording from 1 to 16 user programmable parameters per record, providing total storage for up to 114,688 parameters with a 512K memory module (assuming the entire memory allocated for data logging) one partition for high-speed waveform recording (32 samples x 16 cycles x 6 inputs per record) for disturbance analysis, and one partition for high-resolution waveform recording (128 samples x 4 cycles x 6 inputs per record) for harmonic analysis, each providing storage for up...

  • Page 13: Measurement Capabilities

    1.3 Measurement Capabilities Table 1-1 lists quantities and signals measured, calculated and sensed by the PM295. Measurement readings can be accessed via the front panel and communications. These readings can also be transferred through internal analog and relay outputs, and used as triggers for alarm/event setpoint operations. Ranges and full scale values for measurement parameters are summarized in technical specifications (see Chapter 6).
  • Page 14 Table 1-1 Measured Quantities and Sensed Signals Measurement Mode Usage/output Parameter Real- Sliding Demand Min/ Display Commu- Analog Pulse Data Trigger time average nications output logging setpoint • • • • • • • Total power factor lead Auxiliary measurements •...
  • Page 15 Table 1-1 Measured Quantities and Sensed Signals Measurement Mode Usage/output Parameter Real- Sliding Demand Min/ Display Commu- Analog Pulse Data Trigger time average nications output logging setpoint • • • • • High kVA Á • • • • • High power factor lag Á...
  • Page 16 Table 1-1 Measured Quantities and Sensed Signals Measurement Mode Usage/output Parameter Real- Sliding Demand Min/ Display Commu- Analog Pulse Data Trigger time average nications output logging setpoint • • • • • kvarh (import, export, net, total) • • • •...
  • Page 17 Table 1-1 Measured Quantities and Sensed Signals Measurement Mode Usage/output Parameter Real- Sliding Demand Min/ Display Commu- Analog Pulse Data Trigger time average nications output logging setpoint TOU system parameters • • • Active tariff • • • Active profile Pulse counters •...
  • Page 18 NOTES ¬ For all applications/outputs, the voltage parameters can represent line-to-neutral or line-to-line voltages depending on the wiring configuration selected in the Powermeter. (4Ln3/3Ln3 = line-to-neutral voltages; all other configurations = line-to-line voltages). - In 3-wire connection schemes, the individual phase values for power factor, active power, apparent power and reactive power will be zero, because they have no meaning.

  • Page 19: Installation

    2. Installation 2.1 Initial Inspection Upon receipt, the instrument should be free of damage and in perfect order. To confirm this, first inspect the instrument for physical damage incurred in transit. If the instrument is damaged, inform your local distributor immediately. Only after you have determined that the instrument is damage-free, test the electrical performance .
  • Page 20 Figure 2-1 Front Mounting (standard) Installation...
  • Page 21 Step 1 Connect the bracket to the instrument Step 2 Mount the O-ring on the instrument Step 3 Figure 2-2 Rear Mounting Installation...

  • Page 22: Input/Output Terminals

    2.3 Input/Output Terminals Connections to the PM295 are made via terminals located on the back of the instrument as shown in Figure 2-3 and detailed in Figure 2-4. Figure 2-3 Location of Terminal Strips and Communications Connector Figure 2-4 Connection Terminal #1 Installation...

  • Page 23: Power Source Connection

    2.4 Power Source Connection The instrument can be operated from any single phase AC power source supplying 90-264 VAC 50/60 Hz, or from DC power supply 10-290 VDC. Power supply options are available upon order. For the power source wiring, see Figure 2-4. If an AC power supply is used, the live line of the control power should be connected to terminal 1 and the neutral to terminal 3.

  • Page 24: Input

    NOTE When using potential transformers, the input voltage scale is defined in the instrument by the PT RATIO parameter, which is the relation of the PT primary rated voltage to the secondary rated voltage. For example, using a PT with the ratings of 165 kV : 110 V, the PT RATIO would be 165,000/110 = 1500.

  • Page 25: Harmonic Measurement Connections

    2.7 Harmonic Measurement Connections Harmonic measurements can be made only on signals that are present on the instrument inputs . In some of the 3-wire configurations, there may be one of inputs missing, so the user might not get the appropriate readings. 4-wire Configurations In 4-wire configurations, no special considerations are necessary.

  • Page 26: Wiring Configurations

    2.8 Wiring Configurations WIRING MODE must be set in the instrument in accordance with the wiring configuration. The wrong wiring mode may result in incorrect readings. There are seven possible wiring configuration s : Wiring Configuration Wiring Mode 3-wire direct connection using 2 CTs (2-element) 3DIR 3-wire open delta connection using 2 PTs, 2 CTs (2-element) 3OP2...
  • Page 27 1) Three Wire Direct Connection Using 2 CTs (2-element) This connection can be applied to systems with line-to-line voltage up to 660V. The three line voltages are taken at terminals 2, 5 and 8 as shown in Figure 2-5. Figure 2-5 3-wire Direct Connection Using 2 CTs (2-element) WIRING MODE 3DIR Readings represent line-to-line voltages.
  • Page 28 2) Three Wire Open Delta Connection Using 2 PTs, 2 CTs (2-element) This configuration, shown in Figure 2-6, can be used with either 660V or 120V input. Readings represent line-to-line voltages. The two line currents are measured via 2 CTs; the third current [LINE 2(B)] is calculated based on the two measured currents.
  • Page 29 3) Three Wire Open Delta Connection Using 2 PTs, 3 CTs (2½- element) This configuration, shown in Figure 2-7, can be used with either 660V or 120V input. Readings represent line-to-line voltages. All three line currents are measured. The common taps of the PT secondaries are connected to terminal 11. Note the connection between terminals 5 and 11.
  • Page 30 4) Four Wire Wye Direct Connection Using 3 CTs (3-element) The instrument takes the three line-to-neutral voltages and three line currents as shown in Figure 2-8. The system neutral is connected to terminal 11. Figure 2-8 4-Wire Wye Direct Connection Using 3 CTs (3-element) WIRING MODE 4Ln3/4LL3 Installation...
  • Page 31 5) Four Wire Delta Direct Connection Using 3 CTs (3-element) The instrument senses the three line-to-neutral voltages and three line currents as shown in Figure 2-9. The system neutral is connected to terminal 11. Figure 2-9 4-wire Delta Direct Connection Using 3 CTs (3-element) WIRING MODE 4Ln3/4LL3 Installation...
  • Page 32 6) Four Wire Wye Connection Using 3 PTs, 3 CTs (3-element) This configuration can be used with either 660V or 120V input. The instrument senses the three line-to-neutral voltages and three line currents as shown in Figure 2- 10. The common taps of the PT secondaries are connected to terminal 11. Figure 2-10 4-wire Wye Connection Using 3 PTs, 3 CTs (3-element) WIRING MODE 4Ln3/4LL3 Installation...

  • Page 33: Auxiliary Current Input Connections

    7) Four Wire Wye Connection Using 2 PTs, 3 CTs (2½-element) This configuration can be used with either 660V or 120V input. The instrument senses the 2 line-to-neutral voltages and 3 line currents as shown in Figure 2-11. The common taps of the PT secondaries are connected to terminal 11. This configuration will provide accurate power measurements only if the voltages are balanced.

  • Page 34: Analog Output Connections

    L1 (A) L1 (A) L2 (B) L2 (B) LOAD LOAD L3 (C) L3 (C) a) Neutral current b) Ground leakage current 97-04023 Figure 2-12 Auxiliary Current Input Connections 2.10 Analog Output Connections Figure 2-13 shows wiring for an analog output. The analog output is optically isolated and has an internal source +24 VDC to power the current loop.

  • Page 35: Relay Output Connections

    2.11 Relay Output Connections The PM295 is equipped with four electromechanical relays . Relays #1, #2, and #4 are two-contact Form A (SPST) relays, and relay #3 is a three-contact Form C (SPDT) relay. Relay #1 is a reed relay that is intended for a small load, for example, to output pulses.

  • Page 36: Discrete Input Connections

    2.12 Discrete Input Connections The PM295 provides eight optically isolated dry-contact sensing (voltage-free) discrete inputs. Figure 2-19 shows wiring for discrete inputs. PM295 +5 V 1 kOhm Figure 2-19 Discrete Input Connections The dry contacts connected to discrete inputs must be floating relative to the ground with a minimum rating of 5 VDC, 5 mA.
  • Page 37 Table 2-2 RS-422/RS-485 pinout Name Function Common TXD+ + Transmit Data RXD+ + Receive Data TXD - - Transmit Data RXD - - Receive Data For RS-485 communications, connect together pins 6-7 (TXD+ and RXD+), and pins 8-9 (TXD- and RXD-). Receive/Transmit Indicators The PM295 has two LED indicators, showing activity on the serial port lines.

  • Page 38: Operating The Pm295

    3. Operating The PM295 3.1 Instrument Turn On Connect the PM295 to a suitable power source. When power is applied, the PM295 initiates a series of self tests. Upon completion of self tests, all the front panel LEDs light up for one second and indicate a one-digit diagnostic code. An ‘ 8’ represents normal power up.

  • Page 39: Selecting A Display Page

    The instrument keypad consists of four membrane long-life push-buttons allowing the user to perform all of the front panel functions. The following descriptions detail the keys and their functions in operational mode. UP ARROW t Scrolls display pages forward DOWN ARROW u Scrolls display pages backward SELECT Enters programming mode...

  • Page 40: Programming Mode

    by a boldface. Sub-pages are referred to by the corresponding page number followed by the sub-page number. Table A-1 in Appendix A contains a cross reference to display pages and lists all parameters that can be accessed via the front panel display with their respective location and available resolution.
  • Page 41 Menus Manual operation of the instrument in programming mode is performed through menus. The following sections in this chapter specify all of the menus available for the instrument programming via the front panel. Each PM295 menu is listed with a corresponding front panel display .

  • Page 42: General Operations

    3.3.2 General Operations Selecting a Window An active window is selected by scrolling through menu windows until the target window flashes. Pressing SELECT advances you to the next window. To select a desired window: Ä Press SELECT until the window you want to activate flashes. Selecting and Entering Values The value in the active window is selected with the up/down arrow keys.

  • Page 43: Menu Map

    3.3.3 Menu Map Figure 3-2 shows a map illustrating the PM295 menus. Setup groups are accessed via 13 primary menus that are selected by main menu entries. For setup groups, a map shows the abbreviated labels of menu entries accented with boldface. Primary menus can have enclosed secondary menus and sub-menus.
  • Page 44 bASc BASIC SETUP Port SERIAL PORT SETUP dinP DISCRETE INPUT SETUP COUNTER SETUP Aout ANALOG OUTPUT SETUP AEPn ANALOG EXP. SETUP PulS SELECT ACCESS MAIN PASSWORD PULSING RELAY LEVEL MENU SETUP SEtP PASS bASc ALARM/EVENT OOOO SETPOINTS TIMER SETUP RTC SETUP diSP DATE FORMAT RESET/CLEAR...

  • Page 45: Entering The Password

    3.3.5 Entering the Password menu appears when you enter the programming mode at the PASSWORD protected level while password protection enabled. If you enter an incorrect password, you will return to the previous menu. The upper menu window is a static menu label. A password is entered into the second edit-window.

  • Page 46: Basic Setup

    3.3.7 Basic Setup Select the bASc entry from the MAIN menu and press ENTER Basic setup specifies the general operating characteristics of the instrument, such as wiring mode, input scales, the size of the RMS averaging buffer, etc. The BASIC menu uses three windows: the upper window is a menu label, the second SETUP window displays a list of the setup parameters, and the lower window is the edit-...

  • Page 47: Serial Port Setup

    3.3.8 Serial Port Setup Select the Port entry from the MAIN menu and press ENTER Serial port setup specifies communications parameters that the PM295 needs to communicate with a master computer or a printer. The SERIAL PORT SETUP menu operates the same as the menu (see above).
  • Page 48 Each sub-menu uses three windows: the upper window lists sub-menu entries, two others indicate the allocation status of the eight discrete inputs for the selected input group. Discrete inputs are numbered from the left to right: inputs #1 through #4 - in the central window, and inputs #5 through #8 - in the lower window.

  • Page 49: Counter Setup

    3.3.10 Counter Setup Select the entry from the MAIN menu and press ENTER menu consists of eight sub-menus, each meant for one of COUNTER SETUP eight counters. The upper window lists sub-menu entries, the central window lists pulse inputs that can be connected to the counter, and the lower window displays scale factor for the selected counter.
  • Page 50 lower window displays the value for the selected parameter. See Section 4.10 for information on analog output operation. To select an analog channel setup: An 1 Ä From the upper window, select the desired channel with the up/down arrow keys. To view the analog channel parameters: nonE Ä...

  • Page 51: Analog Expander Setup

    Ä In the same way, select the entry and choose the output parameter. After the new group has been selected, a list of output parameters starts from the first parameter in the group. To adjust the scales for the analog output channel: Ä...

  • Page 52: Pulsing Relay Setup

    3.3.13 Pulsing Relay Setup Select the PulS entry from the MAIN menu and press ENTER PULSING RELAY SETUP menu consists of 4 sub-menus, each meant for one of 4 relay outputs. The upper window lists sub-menus for relay outputs, the central window lists available outputs for the selected relay, and the lower window displays the pulsing value in units per hour for the energy pulsing parameter.

  • Page 53: Event/Alarm Setpoints

    3.3.14 Event/Alarm Setpoints Select the SEtP entry from the MAIN menu and press ENTER menu consists of 16 secondary menus that are EVENT SETPOINTS SETUP accessed via the primary menu entry. The primary menu is used to select one of the 16 available setpoints and perform general control over a setpoint operation such as inspecting its current status , disabling a setpoint or setting up the new setpoint configuration.
  • Page 54 TROUBLESHOOTING If the SEt command is not accepted by the instrument, then one of the setpoint actions handles the relay prior allocated to output pulses. Return to the secondary menu and re-assign relay output, then repeat the SEt command, or quit the menu and disable output pulses via the relay you want to re-allocate to a setpoint (see Section 3.3.13), then repeat setup procedure for the setpoint.
  • Page 55 To enter a sub-menu: Ä From the upper window, select the sub-menu entry with the up/down arrow keys. Ä Press SELECT to enter the selected sub-menu . For instructions on operating sub-menus, see the paragraphs below. To quit the secondary menu and return to the primary menu: Ä...
  • Page 56 name within the group. The setpoint trigger parameters are listed in Table B-7 with their applicable limits. Table B-8 shows abbreviated labels used for specifying operate conditions (greater or equal, less or equal, etc.). NOTE When the operate or release limit value exceeds the number of places in the window, the high order digits are expanded to the left window giving a resolution up to 7 digits.
  • Page 57 To quit the sub-menu: Ä From the central window, press to return to the upper window. ENTER Viewing and Changing a Setpoint Action Each action sub-menu displays the action type and action target for one of four setpoint actions. To enter a sub-menu, select in the upper window one of entries with the up/down arrow keys, then press .
  • Page 58 To quit the sub-menu: Ä From the central window, press ENTER to return to the upper window. Viewing and Changing the Setpoint Delays To enter the delay sub-menu , select in the upper window the entry with the up/down arrow keys, then press the key.

  • Page 59: Timer Setup

    3.3.15 Timer Setup Select the entry from the MAIN menu and press ENTER menu is shown in the illustration below. The upper window is TIMER SETUP the menu label. The central window lists entries for four interval timers, and the lower window displays the timer interval in seconds for the selected timer.
  • Page 60 To quit the RTC menu: Ä From the upper window, press ENTER to return to the MAIN menu. Time Indication The time is displayed in the order of where the hour and minute are HH.MM.SS, shown in the central window, and seconds - in the lower window. The user can set hour and minute independently, and reset seconds to zero.

  • Page 61: Date Format Setup

    To update the day of week: Ä Press SELECT to choose the lower window. Ä Select the day of week with the up/down arrow keys. Ä Press to return to the upper window. ENTER 3.3.17 Date Format Setup To enter the setup menu , select the DiSP entry from the MAIN...

  • Page 62: Password Protection Control

    currently active. The following labels are used to specify the data location to be reset/clear: E.rEG Reset total accumulating energy registers d.rEG Reset total extreme demand registers tOU.E Reset the Time-of-Use System energy registers tOU.d Reset the Time-of-Use System extreme demand registers Clear all counters Lo.Hi Clear Min/Max log...

  • Page 63: Self-Test Diagnostics

    To change the user password: AccS Ä Press to choose the lower window. SELECT PASS Ä Adjust the password with the up/down arrow keys. The password is up to four digits long. 1234 Ä Press to return to the central window. ENTER Store your password in a safe place.

  • Page 64: Operation Techniques

    4. Operation Techniques The following overview of the PM295 measurement and operation techniques is intended to provide an understanding of the way the instrument operates. 4.1 Sampling Technique The input signals taken on the input terminals are sampled at two rates, in an alternating fashion, to provide measurements at different frequency ranges.

  • Page 65: Averaging

    4.2.2 Averaging To split peaks, the PM295 offers a number of techniques for averaging real-time quantities. Two main techniques are used: sliding averaging performed over the predefined number of measurements, and time averaging performed within the predefined demand interval. Sliding averaging is applied to all real-time quantities except harmonic spectrum measurements.

  • Page 66: Demand Measurements

    Programmable Min/Max Log For the real-time harmonic quantities, the PM295 provides 16 programmable Min/Max log registers. The user can allocate these registers to any of the 16 harmonic parameters, and the instrument will continuously monitor them allowing the corresponding minimum and maximum values to be logged. Programmable Min/Max registers operate in the same manner as standard registers, and can be accessed and cleared in the same way.

  • Page 67: Sliding Window Demand

    interval demand could represent the value that will be less than the actual peak demand of the load, thus enabling the electricity consumer to manipulate the load for limited periods within the demand interval. 4.3.3 Sliding Window Demand For sliding window demand, calculations are made upon techniques described above for sliding averaging.

  • Page 68: Accumulated And Predicted Demands

    value after billing demand interval expired. The PM295 allows the user to adjust a thermal time constant in intervals of 1 to 3600 seconds with 0.1 second steps to match the power utility requirements. The following formula is used to define a thermal time constant for your application: τ...

  • Page 69: Demand Interval Measurement

    Accumulated demand can be checked for maximum demand allowed to trigger a setpoint at the moment when the actual demand has exceeded the predefined threshold and prior to the end of the demand interval, when only the new maximum demand value will be calculated. Predicted sliding window demand is a predicted value that a sliding window demand will reach at the end of the present demand interval, assuming the instantaneous power load will not change.

  • Page 70: Resetting The Demands

    The start of the demand interval is not synchronized to internal clock or external source. In the event of loss of power, or when any demand parameter is changed by the user, the instrument immediately begins to measure the first normal demand interval.

  • Page 71: Demand Interval Pulse

    This moment is also assumed to be a time base for following volt/ampere demand interval measurements. 2. Starting immediately, the first shorter demand interval is not considered for the demand measurements, and used exclusively for starting synchronization, for either internal or external time base source.

  • Page 72: Resetting The Energies

    • net energy - the sum of imported and exported energy considering their sign. Readings will represent difference between imported and exported energy keeping the sign of the higher absolute value • total energy - the sum of the absolute values of imported and exported energy.

  • Page 73: Harmonic Parameters

    Fourier analysis is performed on four full waveform cycles providing a harmonic spectrum resolution of 1/4 of the fundamental frequency, so harmonic magnitudes are not falsified by adjacent frequencies. Due to simultaneous sampling of voltage and current waveforms on each phase, harmonic voltages and currents are evaluated with their respective phase angles providing calculations of harmonic powers and power factors.

  • Page 74: Real-Time Waveform Capture

    All harmonic parameters, except phase voltage and current harmonics, can be read via the front panel. Either harmonic parameter can be accessed through communications and used as a trigger for setpoint operation. 4.5.3 Real-time Waveform Capture The real-time waveforms sampled at a rate of 128 samples per cycle that is used in the instrument for harmonic measurements can be captured and transmitted via communications to a master PC for more detailed harmonic analysis.

  • Page 75: Calculated Neutral Current

    4.6.2 Calculated Neutral Current For 4-wire connections, the PM295 provides calculation of the neutral current, which comprises the current that returns through the neutral conductor along with the ground leakage. The range of measurement is the same as for phase currents. The parameter is accessible via the front panel and communications, and can trigger a setpoint.

  • Page 76: Phase Rotation

    assuming the last applicable frequency reading to provide sampling on the input terminals, and for most applications, measurement data will therefore be incorrect. As for other parameters, the PM295 provides both real-time frequency indication and a sliding average value over the last eight measurements. The average frequency reading can be viewed via the front panel, and either reading is accessible through communications, and can trigger setpoint operations.

  • Page 77: Tou System Registers

    defines tariff change points per day indicating the beginning of the new tariff. When a tariff becomes active, the TOU system connects its cumulative and demand keeping registers to prescribed inputs , so they will accumulate measured energy and store extreme demands during the entire tariff period. The currently active tariff and profile numbers are accessible via communications, and can be used to trigger a setpoint.

  • Page 78: Tou Calendars

    4.7.3 TOU Calendars The PM295 TOU calendars cover two full years with a one day resolution. For each day, one of the 16 daily tariff profiles can be applied. 4.7.4 Daily Profiles The PM295 provides up to 16 different daily profiles (types of days), each with up to 8 tariff change points per day.

  • Page 79: Relay Output Operation

    below analog output operation). The user should explicitly configure the status inputs to be used as an analog output selector. Pulse Inputs The input pulse is recognized by the instrument at the negative input transition: open ⇒ closed. To be latched by the instrument, the pulse width should not be less than 50 ms.

  • Page 80: Analog Output Operation

    Each relay can be operated through more than one setpoint. In this case, relay is operated using an OR scheme, i.e., the relay is activated when at least one of the setpoints handling the relay is operated, and the relay is released if there is no one of the setpoints operated.
  • Page 81 - up to 16 multiplexed channels. For each channel, the measured quantity is specified by the user. For the available parameters, see Table 1-1. Switching the multiplexed channels takes approximately 200 ms. This does not include the measuring time, which will vary for different parameters. If no status inputs are allocated for the analog multiplexer, the analog output will be non-multiplexed.

  • Page 82: Analog Expander Operation

    For the signed power factor, use the following conversion formulas. For positive (lagging) power factor: I analog = 20 - PFmeasured × (20 - Zero_offset)/2 For negative (leading) power factor: I analog = Zero_offset - PFmeasured × (20 - Zero_offset)/2 When I analog ≥...

  • Page 83: Counter Operation

    4.12 Counter Operation The PM295 provides 8 multi-function counters that can be used for different purposes. The counter readings are represented by a non-negative number in the range of 0 to 999,999,999. After the maximum value, the counter will rollover to zero.

  • Page 84: User Programmable Events

    The setpoint will be operated continuously at specified intervals when the gating conditions are fulfilled, and will be stopped when they are not. For example, the user can perform time-gated data recording each 5 seconds for two hours from 8:00 to 10:00, or generate pulses through relay output each one second with the pulse duration of 0.5 second to flash an alarm signal when high current on any phase exceeds the predefined threshold, etc.

  • Page 85: On-Board Data Recording

    setpoint in the chain must clear the event for the setpoint chain to be operated once more. Any number of setpoints can be bound into a chain. Holding Volatile Events Some events that can trigger setpoint operations may not be continually stored in the Powermeter because of their volatile nature.
  • Page 86 Primarily, the extended memory is divided onto 19 free-programmable memory partitions: - one event logging partition - 16 data logging partitions - one partition for high-speed waveform logging (32 points × 16 cycles) - one partition for high-resolution waveform logging (128 points × 4 cycles) Each partition is dedicated to a specific data format and occupies continuous block of memory space.

  • Page 87: Event Logging

    available record is read. In all cases of subsequent readings, the user will read the newest records logged from the last time the partition was checked. At any time, the user can restore the pointer to the partition’ s origin record and repeat reading from the beginning.

  • Page 88: Data Logging

    Setpoint operations are not automatically recorded in the event log. If you want to have such operations recorded, you should explicitly specify the event logging action when programming the setpoint, and what kind of setpoint operations to be recorded: the setpoint activation, release, or both transitions. When such a setpoint is operated or released, the instrument records the event operation and all subsequent setpoint actions as separate events.

  • Page 89: High-Speed Waveform Logging

    Table 4-2 Total Data Log Ability Number of parameters per record Record size, byte 4.15.3 High-speed Waveform Logging The high-speed waveform logging partition is primarily meant to store disturbed waveforms upon operating the disturbance trigger. With this trigger, waveform capture and recording can be made at one cycle resolution with respect to the event. When using the disturbance trigger, the user can specify the number of cycles to be recorded prior to the event occurrence.

  • Page 90: High-Resolution Waveform Logging

    4.15.4 High-resolution Waveform Logging The high-resolution waveform logging partition is meant to record waveforms sampled at high frequency of 128 samples per cycle allowing to perform Fourier analysis and harmonic distortion measurements with high resolution up to 63rd harmonic. Waveform recording can run on any trigger. Recorded waveforms are not captured at the time the event triggers recording.

  • Page 91: Monitoring Disturbances

    The minimum number of waveform cycles that can be recorded during a disturbance is 16. The PM295 will record a disturbance as it lasts, so the maximum duration of a disturbance the instrument can record is limited by only the amount of memory allocated by the user for waveform recording.

  • Page 92: Setpoint Operation

    4.17 Setpoint Operation 4.17.1 General The event processing capabilities of the PM295 enable the handling of user-defined actions on programmable internal and external events. The setpoint system managed by the event processor module provides easy and flexible programming for different applications.

  • Page 93: Triggering Conditions

    The triggering condition specifies an event that will be recognized by the instrument as a cause for the setpoint to be operated (activated) or released (deactivated). Throughout this manual, an event is treated as a condition that relies on the value of some parameter, or its status.
  • Page 94 For each trigger, two limits are typically defined: the operate limit to assert the event, and the release limit - to release the event when the operate condition reverts. The release condition is the reversed operate condition (see Table 4-4). Table 4-4 Setpoint Conditions Operate condition Release condition...
  • Page 95 The release condition for logical triggers is always the reversed operate condition (see Table 4-4). The numeric limits are not applicable. NOTE Pulse triggers and interval timers may not be shared by different setpoints. The first setpoint that checks such a trigger will clear it, so that following setpoints will never be operated.

  • Page 96: Delaying Setpoint Operations

    4.17.4 Delaying Setpoint Operations The user can specify two optional delays to prolong monitoring setpoint conditions for more time before making a decision on either setpoint operating or release. When delay is set, the setpoint conditions should prove to be true until delay expires, i.e. for a period at least as long as delay time, for the setpoint to be operated or released.
  • Page 97 Table 4-5 Setpoint Actions Action type Action target Description Range No action Set user event flag Flag number #1 - #8 Reset user event flag Flag number #1 - #8 Operate relay Relay number #1 - #4 Increment counter Counter number #1 - #8 Decrement counter Counter number...

  • Page 98: Special Considerations

    setpoints at the same time. Either relay output is operated using OR scheme for all setpoints. The relay will be operated when there is at least one setpoint activating the relay output, and will be released when this is not the case. 4.17.6 Special Considerations Power Loss In the event of loss of power, all relay outputs will be released.

  • Page 99: Setpoint Programming Techniques

    4.17.7 Setpoint Programming Techniques This section describes setpoint programming practice in examples. It is recommended to use a special form provided in Appendix C to plan setpoint parameters prior the user changes them in the instrument. Refer to Appendix B (Tables B-6, B-7) for the entire list of available setpoint triggers and their abbreviations.
  • Page 100 The setpoint remains operated until the parameter that triggered the setpoint reverts to its release limit. While the trigger parameter is in the band between its operate and release limits (dead band), the setpoint will remain operated. When release conditions are fulfilled, i.e., all trigger parameters are behind their release limits (high current ≤...
  • Page 101 Example 4-3 Sample Of Using Pulse Trigger Trigger conditions Conjunction Trigger parameter Condi- Operate Release tion limit limit Condition #1 Pulse input #1 Condition #2 Relay #1 status Setpoint actions Delays Action type Action target Unit Operate Release Action #1 Operate relay Notice that the pulse trigger is ANDed with the reversed relay status to guarantee that the setpoint will be released after a 1-second operation, with no regard to the...
  • Page 102 Action type Action target Unit Operate Release Action #1 Data logging Reset extreme None Action #2 demands The setpoint will be triggered on the first day of each month between 00:00:00 and 00:15:00 by an external pulse that should come via discrete input #1. Because actions are performed in turn in the specified sequence, recording maximum demands will go before the reset of demand keeping registers will be made.
  • Page 103 Example 4-6 Sample Of Limited Data Recording Trigger conditions Conjunction Trigger parameter Condi- Operate Release tion limit limit Condition #1 Timer #4 ≤ Condition #2 Counter #1 Setpoint actions Delays Action type Action target Unit Operate Release Action #1 Data logging 0.1 s Action #2 INC counter...
  • Page 104 Example 4-8 Sample Of Repeated Condition-Gated Operations Trigger conditions Conjunction Trigger parameter Condi- Operate Release tion limit limit Condition #1 Timer #1 ≥ Condition #2 R-T total kW 20200 20000 Condition #3 Relay status Setpoint actions Delays Action type Action target Unit Operate Release Action #1...
  • Page 105 To utilize both forced operate and forced release options, two programmable event flags should be used as operate conditions for the setpoint, being connected: one - with an OR, and the second - with an AND operation. Monitoring and Recording Disturbances Example 4-10 shows how to program a setpoint for monitoring and recording disturbances.
  • Page 106 Here, two problems arise: The first is that a setpoint may not provide more than four actions at once, and we need at least five to record data in five different data log partitions. The second is that the trigger event is a pulse that will be cleared immediately after we check it, and we need a trigger to operate a setpoint for more long time.

  • Page 107: Update Rates And Response Time

    Setpoint #3 Trigger conditions Conjunction Trigger parameter Condi- Operate Release tion limit limit Condition #1 Event flag #5 Condition #2 Timer #1 Setpoint actions Delays Action type Action target Unit Operate Release Action #1 Data logging 0.1 s Setpoint #4 Trigger conditions Conjunction Trigger parameter...
  • Page 108 When the instrument is turned on and when the instrument setup configuration changed, the instrument always waits for the measurements to be fully settled before displaying readings. The settling delay for time averaged measurements (demands) may be as long as the user-defined averaging interval. The following descriptions can help the user estimate the response time for a particular measurement and output: The data processing modules run on periodical basis, typically 200 ms each for base...

  • Page 109: Communications Operation

    Powermeter. Information on the serial communications protocols is found in the documents shipped on diskette with your PM295: "System 295 Powermeter and Harmonic Analyzer - Communications - ASCII Communications Protocol User's Guide"...

  • Page 110: Eia Rs-422 And Eia Rs-485 Standards

    5.2.2 EIA RS-422 and EIA RS-485 Standards Both RS-422 and RS-485 are serial differential interface standards , permitting reliable communications for distances up to 1200 meters. Because of the differential mode used, line noise is nullified. In the RS-422 standard, the interconnection of instruments with a computer is performed via two pairs of lines, one pair for transmission, and one for reception (full duplex).

  • Page 111: Interface

    If you are using a printer instead of a computer, you should select the Prnt entry. For the printout format, see Section 5.5. For the cable connections , refer to Appendix D. 5.3.2 Interface This parameter configures the communications port for EIA RS-232 or RS - 422/485 standards.

  • Page 112: Data Format

    electrically and electromagnetically noisy environment. In these cases, it is recommended to decrease the baud rate . 5.3.5 Data Format The PM295 supports three data formats: 7 data bits with even parity check, 8 data bits with no parity, and 8 data bits with even parity. In the Modbus RTU protocol, the only 8-bit data format with parity or without parity check may be used.

  • Page 113: Dtr/Rts Control Line

    5.3.7 DTR/RTS Control Line This additional outgoing signal operates independently of DSR/CTS operation. It is commonly not used, but it may be necessary with some of modems or signal converters. With the DTR option selected, this signal is permanently asserted high. When the RTS option is chosen, the signal is asserted high during transmission and is low during reception.

  • Page 114: Response Time

    5.4 Response Time To let the master PC switch a communications port, it is guarantied that Powermeter's minimum response time will not be less than 1,75 character time depending on the baud rate used, and not less than 5 ms. When the RTS option is in effect, the response will be delayed at 10 ms after the RTS line is asserted high.
  • Page 115 The following illustration shows the printout format: * MM/DD/YY HH:MM:SS +KWH Chars Chars Chars Chars Chars Chars Chars Chars Chars -kWH FREQ KVAR KVARH MAX_DM A_MD1 A_MD2 Chars Chars Chars Chars Chars Chars Chars Chars Chars A_MD3 I_UB APP_MD THD_U1 THD_ U2 THD_U3 THD_I1...

  • Page 116: Technical Specifications

    6. Technical Specifications Input and Output Ratings Voltage inputs 120 V INPUT USING PT (up to 120+20% V line-to-line voltage) Burden: < 0.015 VA 660 V DIRECT INPUT (up to 660 V line-to-line voltage or up to 550 V line-to-neutral voltage) Burden: <...
  • Page 117 Input and Output Ratings Communications One optically isolated serial port EIA RS-232, RS-422, and RS-485 standards CONNECTOR: a 9-pin female D-type Display High-brightness seven-segment digital LEDs, 11 windows. A total of 55 pages on two page levels with simultaneous display up to 10 parameters.
  • Page 118 Measurement Specifications Resolution @ range Parameter, unit Full scale Accuracy, % Range Conditions Front panel display Comm. × Voltage, V 10% to 120% 0 to 999,000 @ 1 to 999 V 120V For Ln reading ≤ 1% @ 120V and for @ 1,000 to 999,000 V 3OP2/3OP3 ×...
  • Page 119 Measurement Specifications Resolution @ range Parameter, unit Full scale Accuracy, % Range Conditions Front panel display Comm. Voltage 0 to 300 × unbalance,% Vavg Vavg Current unbalance, 0 to 300 × % Iavg Iavg Frequency, Hz 45.0 to 65.0 0.1 Hz 0.1 Hz Volt demand, V As for voltage...
  • Page 120 Measurement Specifications Resolution @ range Parameter, unit Full scale Accuracy, % Range Conditions Front panel display Comm. 1 ≥ 10% FSI Current harmonics, 0 to 100 0.01 0.01 × 1 ≥ 10% Harmonic voltage, As for voltage As for voltage 1 ≥...

  • Page 121: Appendix A Display Formats

    Appendix A Display Formats Page 1 CURRENT L1 PF TOTAL kVA TOTAL V L1/L12 kVA total Total 3 phase parameters CURRENT L2 kW TOTAL V L2/L23 V L3/L31 kvar TOTAL CURRENT L3 Page 1/1 CURRENT L1 PF L1 V L1/L12 kVA L1 kVA total Phase L1...
  • Page 122 Page 2 MAX.VOLT MAX. AMPERE MAX. kVA FREQUENCY kVA total DEMAND 1 DEMAND L1 DEMAND Maximum volt and ampere demands. MAX. kW MAX. AMPERE MAX.VOLT DEMAND L2 DEMAND DEMAND 2 Maximum block interval kW, kvar, kVA demands MAX. AMPERE MAX.VOLT MAX.
  • Page 123 Page 3 NEUTRAL kVAh kVA total CURRENT U L1/L12 I L1 THD, neutral current, low range kWh IMPORT energies I L2 U L2/L23 kvarh NET U L3 I L3 Page 3/1 EnrG kVA total kWh import (extended range: Ac.i windows 3, 6, 9) I M P O R T k W h Page 3/2...
  • Page 124 Page 3/4 EnrG kVA total kWh total (extended range: windows 3, 6, Ac.t k W h T O T A L Page 3/5 EnrG kVA total kvarh import (extended range: windows 3, 6, 9) rE.i k v a r h I M P O R T Page 3/6 EnrG...
  • Page 125 Page 3/8 EnrG kVA total kvarh total (extended range: rE.t windows 3, 6, 9) k v a r h T O T A L Page 3/9 EnrG kVA total kVAh total (extended range: Ap.t windows 3, 6, 9) k V A h T O T A L Page 3/10 EnrG...
  • Page 126 Page 4 V L1/L12 CURRENT L1 PF TOTAL kVA total Harmonic quantities H01 CURRENT L2 kW TOTAL V L2/L23 V L3 kvar TOTAL CURRENT L3 Page 4/1-19 V L1/L12 CURRENT L1 PF TOTAL H03 (...H39) kVA total Harmonic quantities H03 - H39 (odd CURRENT L2 kW TOTAL V L2/L23...
  • Page 127 Page 5/2 STATUS STATUS kVA total INPUT #1 INPUT #4 Status inputs STATUS STATUS STATUS INPUT #5 INPUT #7 INPUT #2 STATUS STATUS STATUS INPUT #3 INPUT #6 INPUT # 8 Page 5/3 RELAY #1 RELAY #4 kVA total STATUS STATUS Relay status RELAY #2...
  • Page 128 Table A-1 Displayed Parameters Parameter À Unit Á Page/ Window Range, sub-page digits Voltage L1/L12 V/kV Voltage L2/L23 V/kV Voltage L3/L31 V/kV Current L1 A/kA Current L2 A/kA Current L3 A/kA Total power factor Total kW kW/MW Total kvar kvar/Mvar Total kVA kVA/MVA Voltage L1...
  • Page 129 Table A-1 Displayed Parameters Parameter À Unit Á Page/ Window Range, sub-page digits Frequency Max. block interval kW demand kW/MW Max. block interval kvar demand kvar/Mvar Max. block interval kVA demand kVA/MVA Max. sliding window kW demand kW/MW Max. sliding window kvar demand kvar/Mvar Max.
  • Page 130 Table A-1 Displayed Parameters Parameter À Unit Á Page/ Window Range, sub-page digits 3, 6, 9 kvarh total (up to 999,999,999) kvarh 3, 6, 9 kVAh total (up to 999,999,999) kVAh Date of the last energy reset à 3/10 2, 5 3/10 3, 6 Time of the last energy reset...
  • Page 131 Table A-1 Displayed Parameters Parameter À Unit Á Page/ Window Range, sub-page digits Status input #6 (0/1) Status input #7 (0/1) Status input #8 (0/1) Relay #1 status (0/1) Relay #2 status (0/1) Relay #3 status (0/1) Relay #4 status (0/1) Phase L1 angle degrees Phase L2 angle...

  • Page 132: Appendix B Programmable Parameters

    Appendix B Programmable Parameters Table B-1 Setup Parameters Access Parameter Description Options Front Commu- panel nications • • Basic setup See Table B-2 • Communications setup See Table B-3 • • Discrete input setup Allocation group Selects one of the four input Status inputs groups Pulse inputs...
  • Page 133 Table B-1 Setup Parameters Access Parameter Description Options Front Commu- panel nications Analog channel Selects one of the 14 analog 1 to 14 number channels Output parameter Specifies the group for the output see Table B-4a group parameter Output parameter Specifies the measurement see Table B-4b parameter for the channel...
  • Page 134 Table B-1 Setup Parameters Access Parameter Description Options Front Commu- panel nications Action number Selects one of the four setpoint 1 to 4 actions Action type Specifies the action to be made see Table B-9 on setpoint operation Action target Specifies the target to which the see Table B-9 action is intended...
  • Page 135 Table B-1 Setup Parameters Access Parameter Description Options Front Commu- panel nications • Extended memory setup Memory partition Selects the memory partition to be 1-19 setup Number of records Specifies the number of records see Section 2.15 for the partition 0 = delete partition Number of...
  • Page 136 Table B-1 Setup Parameters Access Parameter Description Options Front Commu- panel nications TOU register input Specifies the input for the register identifier Unit-hours per Specifies the number of unit- 1 to 9999 pulse hours per pulse when the register is connected to an external energy-counting meter Daily profiles setup Daily profile...
  • Page 137 Table B-2 Basic Setup Parameters Parameter Range/ Description Code Name options ConF Wiring mode 3OP2 3-wire Open delta via 2 CTs (2 element) 4Ln3 4-wire WYE via 3 PTs (3 element), line to neutral voltage readings 3dir 3-wire direct connection via 2 CTs (2 element) 4LL3 4-wire WYE via 3 PTs (3 element), line to line voltage readings...
  • Page 138 Table B-3 Communications Setup Parameters Parameter Range/ Description Code Name options Prot Communica- ASCII ASCII protocol tions protocol Modbus RTU protocol (mode) tElE ASCII protocol via a modem Prnt Printer output Interface RS-232 interface standard RS-422 interface RS-485 interface Addr Address 0-247 Powermeter address...
  • Page 139 Table B-4a Analog Output Groups Code Description nonE Analog output channel disabled rt.Ph Real-time per phase measurements rt.to Real-time three-phase total measurements rt.Au Real-time auxiliary measurements Ar.Ph Average per phase measurements Ar.to Average three-phase total values Ar.Au Average auxiliary measurements Present demands hr.U1 L1/L12 phase harmonic voltages (odd harmonics)
  • Page 140 Table B-4b Analog Output Parameters Range/scale À Parameter Unit Á Group Code Name Zero Full rE.P1 kvar L1 kvar -Pmax Pmax rE.P2 kvar L2 kvar -Pmax Pmax rE.P3 kvar L3 kvar -Pmax Pmax AP.P1 kVA L1 Pmax AP.P2 kVA L2 Pmax AP.P3 kVA L3...
  • Page 141 Table B-4b Analog Output Parameters Range/scale À Parameter Unit Á Group Code Name Zero Full Voltage L2/L23 Vmax Voltage L3/L31 Vmax cur1 Current L1 Imax cur2 Current L2 Imax cur3 Current L3 Imax Ac.P1 kW L1 -Pmax Pmax Ac.P2 kW L2 -Pmax Pmax Ac.P3...
  • Page 142 Table B-4b Analog Output Parameters Range/scale À Parameter Unit Á Group Code Name Zero Full PF.Ld Total PF Lead 1.00 Ar.Au Average auxiliary measurements Au.C Auxiliary current mA/A Iaux max nEU.C Neutral current Imax Frequency  FrEq 100.0 U.Unb Voltage unbalance C.Unb Current unbalance Present demands...
  • Page 143 Table B-4b Analog Output Parameters Range/scale À Parameter Unit Á Group Code Name Zero Full H01-H39 Harmonic H01-H39 Vmax hr.U2 L2/L23 phase harmonic voltages (odd harmonics) H01-H39 Harmonic H01-H39 Vmax hr.U3 L3 phase harmonic voltages (odd harmonics) H01-H39 Harmonic H01-H39 Vmax hr.C1 L1 phase harmonic currents (odd harmonics)
  • Page 144 Table B-5 Pulsing Relay Outputs Output Description label nonE Relay pulses disabled Ac.Ei kWh imported Ac.EE kWh exported Ac.Et kWh total rE.Ei kvarh imported rE.EE kvarh exported rE.Et kvarh total AP.Et kVAh total dint Demand interval pulse tArF Tariff interval pulse Table B-6 Setpoint Trigger Groups Group label Description...
  • Page 145 Table B-6 Setpoint Trigger Groups Group label Description Present demands hd.U1 L1/L12 phase voltage harmonics hd.U2 L2/L23 phase voltage harmonics hd.U3 L3 phase voltage harmonics hd.C1 L1 phase current harmonics hd.C2 L2 phase current harmonics hd.C3 L3 phase current harmonics hr.U1 L1/L12 phase harmonic voltages (odd harmonics) hr.U2...
  • Page 146 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label nonE nonE No trigger nonE Special inputs Å SPEC GE/LE/Eq/nE 0 -100 Æ U.dtb Voltage disturbance Ph.ro Phase rotation Err/PoS/nEG uSr.E On/OFF User event flags/manual control FLG.1- Event flag #1 - #8 FLG.8...
  • Page 147 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Π Time 00.00.00 to 23.59.59 dAY.U Day of week YEAr Year 0 to 99 Π Month 1 to 12 Π Day of month 1 to 31 dAY.
  • Page 148 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label th.C3 Current THD L3 0 to 100.0 HFc.1 K-Factor L1 1.0 to 999.9 HFc.2 K-Factor L2 1.0 to 999.9 HFc.3 K-Factor L3 1.0 to 999.9 rt.Lo GE/LE/Eq/nE Real-time low values on any phase...
  • Page 149 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Au.C Auxiliary current mA/A 0 to Iaux max nEU.C Neutral current 0 to Imax Frequency  FrEq 0 to 100.0 U.Unb Voltage unbalance 0 to 300 C.Unb Current unbalance 0 to 300...
  • Page 150 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Ar.Lo GE/LE/Eq/nE Average low values on any phase Low voltage 0 to Vmax Low current 0 to Imax Ac.P Low kW -Pmax to Pmax rE.P Low kvar kvar...
  • Page 151 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label U.Unb Voltage unbalance 0 to 300 C.Unb Current unbalance 0 to 300 GE/LE/Eq/nE Present demands Ud. 1 Volt demand L1 0 to Vmax Ud. 2 Volt demand L2 0 to Vmax Ud.
  • Page 152 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label hd.C2 GE/LE/Eq/nE L2 phase current harmonics H01-H40 Harmonic H01-H40 0 to 100.00 hd.C3 GE/LE/Eq/nE L3 phase current harmonics H01-H40 Harmonic H01-H40 0 to 100.00 hr.U1 GE/LE/Eq/nE L1/L12 phase harmonic voltages (odd harmonics)
  • Page 153 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label rE.P2 kvar L2 rE.P3 kvar L3 AP.P1 kVA L1 AP.P2 kVA L2 AP.P3 kVA L3 Power factor L1 Ä Power factor L2 Ä Power factor L3 Ä th.U1 Voltage THD L1/L12 th.U2...
  • Page 154 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Ud. 3 Volt demand L3 Ad. 1 Ampere demand L1 Ad. 2 Ampere demand L2 Ad. 3 Ampere demand L3 Ac.bd Block kW demand rE.bd Block kvar demand AP.bd...
  • Page 155 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Power factor L3 Ä th.U1 Voltage THD L1/L12 th.U2 Voltage THD L2/L23 th.U3 Voltage THD L3 th.C1 Current THD L1 th.C2 Current THD L2 th.C3 Current THD L3 HFc.1...
  • Page 156 Table B-7 Setpoint Trigger Parameters Range À Group Parameter Unit Condition Á label Label Name label Ac.Sd Sliding window kW demand rE.Sd Sliding window kvar demand AP.Sd Sliding window kVA demand Ac.td Thermal kW demand rE.td Thermal kvar demand AP.td Thermal kVA demand Hi.PG Programmable Min/Max maximum registers...
  • Page 157 × Iaux max = 1.2 Auxiliary CT primary current [mA/A] × × Pmax = (Imax Vmax 3)/1000 [kW] @ Wiring mode 4Ln3 or 3Ln3 × × Pmax = (Imax Vmax 2)/1000 [kW] @ Wiring mode 4LL3, 3OP2, 3dir, 3OP3, or 3LL3 Á...
  • Page 158 Table B-9 Setpoint Actions Action type Action target Label Description Range Description rES.C Clear counter Cnt1 - Cnt8 Counter number Clr.E Reset energy registers nonE Clr.d Reset extreme demands nonE Cl.tE Reset TOU energy nonE Cl.td Reset TOU demands nonE Clr.C Clear counters nonE...
  • Page 159 Table B-10 Reset/clear Functions Access Function Description Front- Commu- panel nications • Clear high-speed (32/16) Clears high-speed waveform log waveform log partition • Clear high-resolution (128/4) Clears the high-resolution waveform waveform log log partition • Restore event log Restores the event log queue •...

  • Page 160: Appendix C Setpoint Programming Form

    Appendix C Setpoint Programming Form Setpoint # Trigger conditions Conjunction Trigger parameter Condi- Operate Release tion limit limit Condition #1 Condition #2 Condition #3 Condition #4 Setpoint actions Delays Action type Action target Unit Operate Release Action #1 Action #2 Action #3 Action #4 Setpoint #...

  • Page 161: Appendix D Cable Drawings - Computer Connection

    Appendix D Cable Drawings - Computer Connection RS-232 Cable Connections Simple 3-wire Connection Set the handshaking mode and DTR/RTS control line to NONE (see Section 3.3.8). At the PC cable end, make a short between DSR & DTR pins, and between RTS &...
  • Page 162 Connection Using Hardware Handshaking Set the handshaking mode to hardware mode, and the DTR/RTS control line to DTR mode (see Section 3.3.8). At the PC cable end, make a short between RTS & CTS pins. 25-pin Computer Connector 9-pin DB9 male connector 25-pin DB25 female connector Powermeter IBM PC/Compatible...
  • Page 163 RS-422 Multidrop Cable Connections 1. Install the 120 ohm 1/4 watt terminating resistors externally at the end points of the cable on the last instrument in the chain and on the master computer. 2. The shield of each segment of the cable must be connected to the ground at one end only.
  • Page 164 9-pin Computer Connector Powermeters IBM PC/compatible 9-pin DB9 male connectors A 9-pin DB9 female connector Shield Ω RxD- TxD- TxD- RxD- Shield RTS- CTS- TxD- RxD- Shield Ω TxD- RxD- ATechnical Specificationsppendix D Cable Drawings - Computer Connection...
  • Page 165 RS-485 Multidrop Cable Connections 1. Install the 120 ohm 1/4 watt terminating resistors externally at the end points of the cable, on the last instrument in the chain and on the master computer. 2. The shield of each segment of the cable must be connected to the ground at one end only.
  • Page 166 9-pin Computer Connector Powermeters IBM PC/compatible 9-pin DB9 male connectors A 9-pin DB9 female connector Shield RxD- Ω TxD- TxD- RxD- Shield RTS- CTS- TxD- RxD- Shield Ω TxD- RxD- ATechnical Specificationsppendix D Cable Drawings - Computer Connection...

  • Page 167: Appendix E Cable Drawings - Serial Printer Connection

    Appendix E Cable Drawings - Serial Printer Connection Simple 3-wire Connection Set the handshaking mode and the DTR/RTS control line to NONE (see Section 3.3.8). Do not use this connection if your printer has less than 256 bytes of input buffer.
  • Page 168 25-pin DCE Printer Connector A 9-pin DB9 male connector A 25-pin DB25 male connector Powermeter Printer DTR/RTS DSR/CTS In some printers, an additional short may be needed between DSR and RTS pins (dashed line). 9-pin DCE Printer Connector A 9-pin DB9 male connector A 9-pin DB9 male connector Powermeter Printer...
  • Page 169 Connection Using Hardware Handshaking Set handshaking mode to 'hardware mode', and the DTR/RTS control line to DTR mode (see Section 3.3.8). In some printers, a short between DSR and CTS pins may be needed (dashed line). 25-pin DTE Printer Connector A 9-pin DB9 male connector A 25-pin DB25 female connector Powermeter...
  • Page 170 25-pin DCE Printer Connector A 9-pin DB9 male connector A 25-pin DB25 male connector Powermeter Printer DTR/RTS DSR/CTS 9-pin DCE Printer Connector A 9-pin DB9 male connector A 9-pin DB9 male connector Powermeter Printer DTR/RTS DSR/CTS Appendix E Cable Drawings - Printer Connection...

  • Page 171: Appendix F Cable Drawings - Modem Connection

    Appendix F Cable Drawings - Modem Connection Set the handshaking mode to NONE, and communications mode to tELE mode. Configure the remote modem to answer incoming calls automatically and ignore the DTR signal; disable the flow control option. Refer to your modem manual for appropriate commands.

  • Page 172: Index

    INDEX accuracy, 59, 64, 68, 75 harmonic, 1, 3, 4, 8, 10, 17, 56, 57, 58, 65, active power, 10, 95, 131, 135, 137 66, 82, 100, 111, 112, 122, 123, 131, 134, ampere demand, 57, 58, 61, 63, 107, 120, 129 135, 137, 144 analog outputs, 2, 74 ASCII, 102, 103...
  • Page 173 reset, 3, 32, 52, 53, 54, 55, 58, 61, 62, 64, 75, 93, 94, 122 terminals, ii, 14, 15, 16, 19, 20, 21, 56, 68, RS-232, 28, 101 RS-422, 28, 101, 102, 103 RS-485, 102, 103 voltage inputs, 1, 11, 67 setpoints, 2, 3, 45, 72, 76, 77, 87, 89, 90, 97, 98, 125 sliding demand, 61...

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