PowerLogic PM-620 - Alternate VAR Sign Convention

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Power Meter Bulletin No. 3020IM9503R6/98

Chapter 8—Metering Capabilities December 1998

WATTS POSITIVE (+)

VARS POSITIVE (+)

P.F. LAGGING (–)

REAL

POWER

REACTIVE

POWER

Quadrant

WATTS NEGATIVE (–)

VARS POSITIVE (+)

P.F. LEADING (+)

Reverse Power Flow

Normal Power Flow

WATTS NEGATIVE (–)

VARS NEGATIVE (–)

P.F. LAGGING (–)

WATTS POSITIVE (+)

VARS NEGATIVE (–)

P.F. LEADING (+)

Figure 8-3: Alternate VAR sign convention

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Default Chapter2
- Technical Support2
- Table of Contents5
Chapter 1-Introduction9
- What Is the Power Meter9
- Summary of Power Meter Instrumentation10
  - Using this Bulletin11
    - Not Covered in this Bulletin11
    - Notational Conventions11
Chapter 2-Safety Precautions13
Chapter 3-Hardware Description15
- Display15
- 3-1: Power Meter Display Components16
- 3-2: Power Meter Display, Front and Back17
  - Power Meter Connections18
- 3-3: Front of Power Meter and Terminal Shield Label18
Chapter 4-Installation19
- Power Meter/Display Mounting Options19
- Mounting the Display20
  - In Existing 1% Ammeter/Voltmeter Cutout20
  - On Panel Without Existing 1% Ammeter/Voltmeter Cutout21
- Mounting the Power Meter22
  - Directly Behind the Display22
- Existing Ammeter/Voltmeter Cutout23
  - Remote Mounting24
- 4-2: Mounting Power Meter on Panel with no Existing Cutout25
- 4-3: Panel Mount for the Power Meter Display25
  - DIN Rail Mounting26
- 4-4: Mounting Power Meter on 35 MM DIN Rail27
Chapter 5-Wiring29
- Wiring Cts, Pts, and Control Power29
- 5-1: Clamp-On Ferrite and Disconnect Breaker for CE Compliance31
- 5-2: Opening the Clamp-On Ferrite31
- 5-3: 3-Phase, 3-Wire Delta Direct Voltage Connection with 2 Cts32
- 5-4: 3-Phase, 3-Wire Delta with 2 Pts and 2 Cts33
- 5-5: 3-Phase, 3-Wire Delta with 2 Pts and 3 Cts34
- 5-6: 3-Phase, 4-Wire Wye, Ground and Direct Voltage Connection, with 3 Cts35
- 5-7: 3-Phase, 4-Wire Wye, Ground Connection, with 3 Pts and 3 Cts36
- 5-8: DC Control Power Wiring37
- 5-9: Power Meter Wire Routing38
- 5-10: KYZ Pulse Output41
- 5-11: Typical KYZ Pulse Output Connection for Use as an Alarm Contact42
Chapter 6-Communications43
- Protocols43
- POWERLOGIC Protocol Communications Wiring43
  - Connecting to a Personal Computer Via POWERLOGIC Communications44
- 6-1: Power Meters Connected to a Personal Computer Via SY/LINK Card44
  - Connecting to a POWERLOGIC Network Interface Module (PNIM) Using POWERLOGIC Communications45
- 6-2: Power Meters Connected to a PNIM45
  - Connecting to a SY/MAX Programmable Controller Using POWERLOGIC Communications46
- 6-3: Power Meters Connected to a SY/MAX Programmable Controller46
- Labeling the CAB-107 Leads51
  - Terminating the Communications Link (POWERLOGIC, Modbus, or Jbus)52
- Terminating Power Meter with Terminal Block and MCT-48553
Chapter 7-Display Operation55
- Introduction55
- Modes55
- Setting up the Power Meter60
- Power Meter Setup Flowchart61
Chapter 8-Metering Capabilities65
- Real-Time Readings65
- Min/Max Values (PM-650 Only)65
- Power Factor Min/Max Conventions66
- Power Factor Min/Max Example67
- Alternate VAR Sign Convention68
Chapter 9-Onboard Alarming (PM-650 Only)74
- Setpoint-Driven Alarms74
- Setpoint-Controlled Relay Functions75
Chapter 10-Logging (PM-650 Only)77
- Alarm Log77
- Event Log77
- Data Log77
- Alarm-Driven Data Log Entries77
- Storage Considerations77
Appendix A-Specifications78
Appendix B-Dimensions80
Appendix C-Communication Cable Pinouts81
Appendix D-Additional Wiring Diagrams82
- D-1: Power Meter System Wiring Connections83
- D-1: 240/120 V 1-Phase, 3-Wire Direct Voltage Connection with 2 Cts84
- D-2: 3-Phase, 4-Wire Delta with 3 Pts and 3 Cts85
- D-3: 3-Phase, 4-Wire Wye, 3-Wire Load with 3 Pts and 2 Cts86
Appendix E-Using the Command Interface87
Appendix F-Register List89
Appendix G-Modbus and Jbus Functions Supported109
Appendix H-2-Wire Modbus or Jbus111
Appendix I-Alarm Setup (PM-650 Only)112
Appendix J-Calculating Log File Size (PM-650 Only)116

PowerLogic PM-620 - Alternate VAR Sign Convention

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