CHAPTER 1: OVERVIEW SPECIFICATIONS
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–15
UNDERVOLTAGE MONITORING
REQ’D VOLTAGE: > 20 V applied in all phases
PICKUP: 0.50 to 0.99 in steps of 0.01 × VT
DROPOUT: 103% of pickup
TIME DELAY: 0.5 to 600.0 in steps of 0.5 sec.
PHASES: Any 1 / Any 2 / All 3 (programmable) have to be ≤ pickup to
operate
ACCURACY: Per voltage input
TIMING ACCURACY: –0.5 / +1 sec.
Table 2: Measured Values
1
1. Specified for 0 to 40°C
PARAMETER ACCURACY RANGE
VOLTAGE ±0.2% of full scale 20 to 100% of VT
CURRENT ±0.2% of full scale 1 to 150% of CT
V UNBALANCE ±1% of full scale 0 to 100%
I UNBALANCE ±1% of full scale 0 to 100%
kW ±4% of full scale
0 to ±999,999.99
kW
kvar ±4% of full scale
0 to ±999,999.99
kvar
kVA ±4% of full scale
0 to 999,999.99
kVA
kWh ±4% of full scale
2
32
kWh
kvarh ±4% of full scale
2
32
kvarh
kVAh ±4% of full scale
2
32
kVAh
PF ±1.0% of full scale ±0.00 to 1.00
FREQUENCY ±0.02Hz 20.00 to 70.00 Hz
kW DEMAND ±0.4% of full scale
0 to ±999 999.99
kW
kvar DEMAND ±0.4% of full scale
0 to ±999 999.99
kvar
kVA DEMAND ±0.4% of full scale
0 to 999 999.99
kVA
AMP DEMAND ±0.2% of full scale 0 to 7500 A
AMPS THD ±2.0% of full scale 0.0 to 100.0%
VOLTS THD ±2.0% of full scale 0.0 to 100.0%
CREST FACTOR ±0.4% of full scale 1 to 9.99
Courtesy of NationalSwitchgear.com
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