Metering; Inputs - GE M60 Instruction Manual

CHAPTER 2: PRODUCT DESCRIPTION
MOTOR LEARNED DATA
Learned acceleration time accuracy:
Learned starting current accuracy:
Average motor load learned accuracy: 1%

2.4.4 Metering

RMS CURRENT: PHASE, NEUTRAL, AND GROUND
Accuracy at
0.1 to 2.0  CT rating:
2.0  CT rating:
RMS VOLTAGE
Accuracy:
REAL POWER (WATTS)
Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:
REACTIVE POWER (VARS)
Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:
APPARENT POWER (VA)
Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:
WATT-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
Range:
Parameters:
Update rate:
VAR-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
Range:
Parameters:
Update rate:
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu:
I = 0.1 to 0.25 pu:
I > 0.25 pu:

2.4.5 Inputs

AC CURRENT
CT rated primary:
CT rated secondary:
Relay burden:
Conversion range:
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL

60-minute rate:
01 channel for NN days
16 channels for NN days
1%
1%
±0.25% of reading or ±0.1% of rated (whichever is greater)
±1.0% of reading
±0.5% of reading from 10 to 208 V
±1.0% of reading at –1.0  PF < –0.8 and 0.8 < PF 10
±1.0% of reading at –0.2  PF  0.2
±1.0% of reading
±2.0% of reading
6
±0 to 1  10
MWh
three-phase only
50 ms
±2.0% of reading
6
±0 to 1  10
Mvarh
three-phase only
50 ms
±0.01 Hz (when voltage signal is used for frequency measurement)
±0.05 Hz
±0.02 Hz (when current signal is used for frequency measurement)
1 to 50000 A
1 A or 5 A by connection
< 0.2 VA at rated secondary
SPECIFICATIONS
2
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