Metering; Inputs - GE M60 Instruction Manual

SPECIFICATIONS
MOTOR LEARNED DATA
Learned acceleration time accuracy:
Learned starting current accuracy:
Average motor load learned accuracy: 1%

2.5.4 Metering

2
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:

2.5.5 Inputs

AC CURRENT
CT rated primary:
CT rated secondary:
Relay burden:
Conversion range:
Standard CT:
Sensitive Ground CT module:
2-28
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
±0.001 Hz (when voltage signal is used for frequency measurement)
±0.005 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
0.02 to 46 × CT rating RMS symmetrical
0.002 to 4.6 × CT rating RMS symmetrical
CHAPTER 2: PRODUCT DESCRIPTION
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL