GE Pqm 2 Manual

							PQMII POWER QUALITY METER  – INSTRUCTION MANUAL6–1
PQMII Power Quality Meter
Chapter 6: Monitoring
Digital Energy
Monit oring
6.1 Actual Values Viewing
6.1.1 Description
Any measured value can be displayed on demand using the MENU and MESSAGE keys. 
Press the 
MENU key to select the actual values, then the MESSAGE RIGHT key to select the 
beginning of a new page of monitored values. These are grouped as follows: A1 Metering, 
A2 Status, A3 Power Analysis, and A4 Product Info. Use the 
MESSAGE keys to move 
between actual value messages. A detailed description of each displayed message in 
these groups is given in the sections that follow. 
						

							6–2PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 6: MONITORING
6.1.2 Actual Values Menu
 ACTUAL VALUES []
A1 METERING CURRENT []See page 6–4.
MESSAGE
 VOLTAGE []See page 6–6.
MESSAGE
 PHASORS []See page 6–8.
MESSAGE
 POWER []See page 6–8.
MESSAGE
 ENERGY []See page 6–12.
MESSAGE
 DEMAND []See page 6–14.
MESSAGE
 FREQUENCY []See page 6–15.
MESSAGE
 PULSE INPUT []
COUNTERSSee page 6–16.
MESSAGE
 ANALOG INPUT []See page 6–17.
MESSAGE
 END OF PAGE A1 []
MESSAGE

 ACTUAL VALUES []
A2 STATUS ALARMS []See page 6–18.
MESSAGE
 SWITCHES []See page 6–20.
MESSAGE
 CLOCK []See page 6–21.
MESSAGE
 PROGRAMMABLE []
MESSAGESee page 6–21.
MESSAGE
 END OF PAGE A2 []
MESSAGE

 ACTUAL VALUES []
A3 POWER ANALYSIS POWER QUALITY []
VALUESSee page 6–22.
MESSAGE
 TOTAL HARMONIC []
DISTORTIONSee page 6–22.
MESSAGE
 DATA LOGGER []See page 6–24. 
						

							CHAPTER 6: MONITORING
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL6–3 MESSAGE
 EVENT RECORDER []See page 6–24.
MESSAGE
 VOLTAGE DIST. []
RECORDERSee page 6–28.
MESSAGE
 END OF PAGE A3 []
MESSAGE

 ACTUAL VALUES []
A4 PRODUCT INFO SOFTWARE []
VERSIONSSee page 6–30.

 MODEL []
INFORMATIONSee page 6–30.
MESSAGE
 END OF PAGE A4 [] 
						

							6–4PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 6: MONITORING
6.2 A1 Metering
6.2.1 Current Metering
PATH: ACTUAL VALUES  A1 METERING  CURRENT
•A, B, C CURRENT: Displays the current in each phase corresponding to the A, B, and C 
phase inputs. Current will be measured correctly only if the 
CT PRIMARY is entered to 
match the installed CT primary and the CT secondary is wired to match the 1 or 5 A 
input . If the displayed current does not match the actual current , check this setpoint 
and wiring.
•Iavg/Vavg: Displays the average of the three phase currents and three voltages. This 
line is not visible if the 
VT WIRING setpoint is set to “Single Phase Direct”. L-N is displayed 
when 
VT WIRING is set to “4 Wire Wye /3 VTs”, “4 Wire Wye Direct”, “4 Wire Wye / 2 VTs”, 
or “3 Wire Direct”. L-L is displayed when 
VT WIRING is set to “3 Wire Delta / 2 VTs”.
 CURRENT [] A = 100 B = 100
C = 100 AMPS
MESSAGEIavg = 100 AMPS
Vavg = 120 V L-N
MESSAGENEUTRAL CURRENT =
0 AMPS
MESSAGECURRENT UNBALANCE =
0.0%
MESSAGEIa MIN =  100 AMPS
12:00:00am 01/01/95
MESSAGEIb MIN =  100 AMPS
12:00:00am 01/01/95
MESSAGEIc MIN =  100 AMPS
12:00:00am 01/01/95
MESSAGEIn MIN =  100 AMPS
12:00:00am 01/01/95
MESSAGEI U/B MIN =  0.0%
12:00:00am 01/01/95
MESSAGEIa MAX =  100 AMPS
12:00:00am 01/01/95
MESSAGEIb MAX =  100 AMPS
12:00:00am 01/01/95
MESSAGEIc MAX =  100 AMPS
12:00:00am 01/01/95
MESSAGEIn MAX =  100 AMPS
12:00:00am 01/01/95
MESSAGEI U/B MAX =  0.0%
12:00:00am 01/01/95 
						

							CHAPTER 6: MONITORING
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL6–5
•NEUTRAL CURRENT: Neutral current can be determined by two methods. One method 
measures the current via the neutral CT input . The second calculates the neutral 
current based on the three phase currents; using the instantaneous samples, 
Ia + Ib + 
Ic = In. If the sum of the phase currents does not equal 0, the result is the neutral 
current . When using the CT input , the neutral current reading will be correct only if the 
CT is wired correctly and the correct neutral CT primary value is entered. Verify neutral 
current by connecting a clamp-on ammeter around all 3 phases. If the neutral current 
appears incorrect , check the settings in 
S2 SYSTEM SETUP  CURRENT/VOLTAGE 
CONFIGURATION
 and verify the CT wiring.
•CURRENT UNBALANCE: Displays the percentage of current unbalance. Current 
unbalance is calculated as:
(EQ 0.1)
where:Iav = average phase current = (Ia + Ib + Ic) / 3
I
m = current in phase with maximum deviation from Iav,
Even though it is possible to achieve unbalance greater than 100% with the above 
formula, the PQMII limits unbalance readings to 100%.
If the average current is below 10% of the 
CT PRIMARY setpoint , the unbalance reading 
is forced to 0%. This avoids nuisance alarms when the system is lightly loaded. If the 
simulation currents are being used, the unbalance is never forced to 0%.
•Ia, Ib, Ic, In MIN: Displays the minimum current magnitudes and the time and date of 
their occurrence. This information is stored in non-volatile memory and is retained 
during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA  CLEAR MIN/MAX CURRENT 
VALUE S
 setpoint clears these values.
•I U/B MIN: Displays the minimum current unbalance and the time and date of its 
measurement . This information is stored in non-volatile memory and is retained 
during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA  CLEAR MIN/MAX CURRENT 
VALUE S
 setpoint clears this value.
•Ia, Ib, Ic, In MAX: Displays the maximum current magnitudes and the time and date of 
their occurrence. This information is stored in non-volatile memory and is retained 
during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA  CLEAR MIN/MAX CURRENT 
VALUE S
 setpoint clears these values.
•I U/B MAX: Displays the maximum current unbalance and the time and date of its 
measurement . This information is stored in non-volatile memory and is retained 
during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA  CLEAR MIN/MAX CURRENT 
VALUE S
 setpoint command clears this value.
Current UnbalanceImIav–
I
av
---------------------
100 % × = 
						

							6–6PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 6: MONITORING
6.2.2 Voltage Metering
PATH: ACTUAL VALUES  A1 METERING  VOLTAGE
 VOLTAGE [] Van = 120 Vbn = 120
Vcn = 120 V
MESSAGEIavg = 100 AMPS
Vavg = 120 V L-N
MESSAGEVab= 0 Vbc= 0
Vca= 0 V
MESSAGEAVERAGE LINE
VOLTAGE =  208 V
MESSAGEVOLTAGE UNBALANCE =
0.0%
MESSAGEVan MIN =  100 V
12:00:00am 01/01/95
MESSAGEVbn MIN =  100 V
12:00:00am 01/01/95
MESSAGEVcn MIN =  100 V
12:00:00am 01/01/95
MESSAGEVab MIN =  173 V
12:00:00am 01/01/95
MESSAGEVbc MIN =  173 V
12:00:00am 01/01/95
MESSAGEVca MIN =  173 V
12:00:00am 01/01/95
MESSAGEV U/B MIN =  0.0%
12:00:00am 01/01/95
MESSAGEVan MAX =  140 V
12:00:00am 01/01/95
MESSAGEVbn MAX =  140 V
12:00:00am 01/01/95
MESSAGEVcn MAX =  140 V
12:00:00am 01/01/95
MESSAGEVab MAX =  242 V
12:00:00am 01/01/95
MESSAGEVbc MAX =  242 V
12:00:00am 01/01/95
MESSAGEVca MAX =  242 V
12:00:00am 01/01/95
MESSAGEV U/B MAX =  5.1%
12:00:00am 01/01/95 
						

							CHAPTER 6: MONITORING
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL6–7
•Van, Vbn, Vcn: Displays phase voltages corresponding to the A, B, and C voltage 
inputs. This voltage will be measured correctly only if the 
VT RATIO, VT NOMINAL 
SECONDARY
, and VOLTAGE WIRING setpoints match the installed VTs. If the displayed 
voltage does not match the actual voltage, check the setpoints and wiring. This 
message appears only if the 
VT WIRING is conf igured for a wye input .
•Iavg/Vavg: Displays the average of the three phase currents/voltages. This value is 
not visible if the 
VT WIRING setpoint is set to “Single Phase Direct”. L-N is displayed when 
VT WIRING is set to “4 Wire Wye / 3 VTs”, “4 Wire Wye Direct”, “4 Wire Wye / 2 VTs”, or “3 
Wire Direct” and L-L is displayed when 
VT WIRING is set to “3 Wire Delta / 2 VTs”.
•Vab, Vbc, Vca: Displays line voltages corresponding to the A, B, and C voltage inputs. 
The measured voltage is correct only if the 
VT RATIO, VT NOMINAL SECONDARY, and VOLTAGE 
WIRING
 setpoints match the installed VTs. If the displayed voltage does not match the 
actual voltage, check the setpoints and wiring.
•AVERAGE LINE VOLTAGE: Displays the average of the three line voltages. This value is 
not visible if the 
VT WIRING setpoint is set to “Single Phase Direct”.
•VOLTAGE UNBALANCE: Displays the percentage voltage unbalance. Voltage 
unbalance is calculated as shown below. If the 
VOLTAGE WIRING is conf igured for a wye 
input , voltage unbalance is calculated using phase quantities. If the 
VT WIRING is 
conf igured as a delta input , voltage unbalance is calculated using line voltages.
(EQ 0.2)
where:Vavg= average phase voltage = (Van + Vbn + Vcn) / 3 for “Wye” and “3 
Wire Direct” connections;
= average line voltage = (
Vab + Vbc + Vca) / 3 for “3 Wire Delta / 2 VTs” 
connection
Vm = voltage in a phase (or line) with maximum deviation from Vavg.
NoteEven though it is possible to achieve unbalance greater than 100% with the above 
formula, the PQMII will limit unbalance readings to 100%.
If the average voltage is below 10% of 
VT RATIO×VT NOMINAL SECONDARY VOLTAGE for “3 
Wire Delta / 2 VTs”, “4 Wire Wye / 3 VTs”, and “4 Wire Wye / 2 VTs” connections, or 
below 10% of 
VT RATIO×NOMINAL DIRECT INPUT VOLTAGE for “4 Wire Wye/Direct” and “3 
Wire Direct” connections, the unbalance reading is forced to 0%. This is implemented 
to avoid nuisance alarms when the system is lightly loaded. If the simulation voltages 
are being used, the unbalance is never forced to 0%. 
•Van, Vbn, Vcn MIN/MAX: Displays the minimum/maximum phase voltage magnitudes 
and the time and date of their occurrence. This information is stored in non-volatile 
memory and is retained during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA 
 CLEAR MIN/MAX VOLTAGE VALUES setpoint clears these values.
•Vab, Vbc, Vca MIN/MAX: Displays the minimum/maximum line voltage magnitudes 
and the time and date of their occurrence. This information is stored in non-volatile 
memory and is retained during loss of control power. The 
S1 PQMII SETUP  CLEAR DATA 
 CLEAR MIN/MAX VOLTAGE VALUES setpoint clears these values.
•V U/B MIN/MAX: Displays minimum/maximum voltage unbalance and the time and 
date of its measurement . This information is stored in non-volatile memory and is 
retained during loss of control power. This value is cleared with the 
S1 PQMII SETUP  
CLEAR DATA 
 CLEAR MIN/MAX VOLTAGE VALUES setpoint .
Voltage UnbalanceVmVavg–
V
avg---------------------------
100 % × = 
						

							6–8PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 6: MONITORING
6.2.3 Phasors
PATH: ACTUAL VALUES  A1 METERING  PHASORS
•Va PHASOR: Displays a phasor representation for the magnitude and angle of Va. Va is 
used as a reference for all other phasor angles. If there is no voltage present at the 
PQMII voltage inputs, then Ia will be used as the reference for all other angles. Va is 
also used as the reference when in Simulation Mode.
•Vb/Vc PHASOR: Displays a phasor representation for the magnitude and angle of Vb/
Vc. Both 
VB and VC PHASOR values use the angle of VA PHASOR as a reference point . If 
there is no voltage at the PQMII voltage inputs, 
IA PHASOR is used as the reference. 
These setpoints are not displayed when the PQMII is conf igured for the “3 Wire Delta/2 
VTs”, “4 Wire Wye/2 VTs”, or “Single Phase Direct” connections.
•Ia PHASOR: A phasor representation for the magnitude and angle of Ia is displayed 
here. Ia is used as a reference for all other Phasor angles only when there is no voltage 
present at the PQMII voltage inputs, otherwise, Va is used as the reference.
•Ib/Ic PHASOR: A phasor representation for the magnitude and angle of Ib/Ic is 
displayed here. The Ib and Ic currents use the angle of Va as a reference point . If there 
is no voltage at the PQMII voltage inputs, Ia is used as the reference. These setpoints 
are is not displayed when the PQMII is configured for “Single Phase Direct” connection.
6.2.4 Power Metering
PATH: ACTUAL VALUES  A1 METERING  POWER
 PHASORS [] Va PHASOR:
0V at  0° Lag
MESSAGEVb PHASOR:
0V at  0° Lag
MESSAGEVc PHASOR:
0V at  0° Lag
MESSAGEIa PHASOR:
0A at  0° Lag
MESSAGEIb PHASOR:
0A at  0° Lag
MESSAGEIc PHASOR:
0A at  0° Lag
 POWER [] THREE PHASE REAL
POWER = 1000 kW
MESSAGETHREE PHASE REACTIVE
POWER = 120 kvar
MESSAGETHREE PHASE APPARENT
POWER = 1007 kVA
MESSAGETHREE PHASE POWER
FACTOR = 0.99 Lag 
						

							CHAPTER 6: MONITORING
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL6–9 MESSAGE
PHASE A REAL
POWER =  1000 kW
MESSAGEPHASE A REACTIVE
POWER =  120 kvar
MESSAGEPHASE A APPARENT
POWER =  1007 kVA
MESSAGEPHASE A POWER FACTOR
= 0.99 Lag
MESSAGEPHASE B REAL
POWER =  1000 kW
MESSAGEPHASE B REACTIVE
POWER =  120 kvar
MESSAGEPHASE B APPARENT
POWER =  1007 kVA
MESSAGEPHASE B POWER FACTOR
= 0.99 Lag
MESSAGEPHASE C REAL
POWER =  1000 kW
MESSAGEPHASE C REACTIVE
POWER =  120 kvar
MESSAGEPHASE C APPARENT
POWER =  1007 kVA
MESSAGEPHASE C POWER FACTOR
= 0.99 Lag
MESSAGETHREE PHASE REAL
POWER =  10.00 MW
MESSAGETHREE PHASE REACTIVE
POWER =  1.20 Mvar
MESSAGETHREE PHASE APPARENT
POWER =  10.07 MVA
MESSAGE3Φ kW MIN =  1000
12:00:00am 01/01/95
MESSAGE3Φ kvar MIN =  120
12:00:00am 01/01/95
MESSAGE3Φ kVA MIN =  1007
12:00:00am 01/01/95
MESSAGE3Φ PF MIN = 0.99 Lag
12:00:00am 01/01/95
MESSAGE3Φ kW MAX =  1000
12:00:00am 01/01/95
MESSAGE3Φ kvar MAX =  120
12:00:00am 01/01/95 
						

							6–10PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 6: MONITORING
MESSAGE3Φ kVA MAX =  1007
12:00:00am 01/01/95
MESSAGE3Φ PF MAX = 0.99 Lag
12:00:00am 01/01/95
MESSAGEAΦ kW MIN =  1000
12:00:00am 01/01/95
MESSAGEAΦ kvar MIN =  120
12:00:00am 01/01/95
MESSAGEAΦ kVA MIN =  1007
12:00:00am 01/01/95
MESSAGEAΦ PF MIN = 0.99 Lag
12:00:00am 01/01/95
MESSAGEAΦ kW MAX =  1000
12:00:00am 01/01/95
MESSAGEAΦ kvar MAX =  120
12:00:00am 01/01/95
MESSAGEAΦ kVA MAX =  1007
12:00:00am 01/01/95
MESSAGEAΦ PF MAX = 0.99 Lag
12:00:00am 01/01/95
MESSAGEBΦ kW MIN =  1000
12:00:00am 01/01/95
MESSAGEBΦ kvar MIN =  120
12:00:00am 01/01/95
MESSAGEBΦ kVA MIN =  1007
12:00:00am 01/01/95
MESSAGEBΦ PF MIN = 0.99 Lag
12:00:00am 01/01/95
MESSAGEBΦ kW MAX =  1000
12:00:00am 01/01/95
MESSAGEBΦ kvar MAX =  120
12:00:00am 01/01/95
MESSAGEBΦ kVA MAX =  1007
12:00:00am 01/01/95
MESSAGEBΦ PF MAX = 0.99 Lag
12:00:00am 01/01/95
MESSAGECΦ kW MIN =  1000
12:00:00am 01/01/95
MESSAGECΦ kvar MIN =  120
12:00:00am 01/01/95