GE M60 Instruction Manual page 26

SPECIFICATIONS
Standard overload curve, cutoff effect:
t = -------------------------------------------------------------------------------------------------------------------------------- -
trip


0.02530337

Standard overload curve, shift effect:
t = -----------------------------------------------------------------------------------------------------------------------------------------------
trip


0.02530337

2
Motor rated voltage:
Thermal model biasing:
Thermal model update rate:
Stopped/running time cool constants:
Stopped/running time cool constants decay: exponential
Hot/cold safe stall ratio:
Current accuracy:
Current source:
Timer accuracy:
Timer accuracy for voltage dependent overload:
STATOR DIFFERENTIAL
Pickup:
Slope 1 and 2:
Break 1:
Break 2:
Operate time:
GROUND TOC
Current:
Pickup level:
Dropout level:
Level accuracy:
for 0.1 to 2.0  CT:
for > 2.0  CT:
Curve shapes:
Curve multiplier:
Reset type:
Curve timing accuracy at 1.03 to 20 x pickup:
Voltage restraint:
PHASE/NEUTRAL/GROUND IOC
Current:
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0  CT rating:
> 2.0  CT rating:
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timer accuracy:
2-16
TD  2.2116623
I 2 I
 
motor motor

------------ - 1 + 0.05054758 ------------ - 1
–
 
FLA FLA

TD 2.2116623
I 2 I
 
motor

------------------- - 1 + 0.05054758 ------------------- - 1
–
 

OF FLA OF
1 to 50000 V in steps of 1
current unbalance, RTDs
1 power cycle
1 to 65000 min. in steps of 1
0.01 to 1.00 in steps of 0.01
per phase current inputs
true RMS
±100 ms or ±2%, whichever is greater
±100 ms or ±4%, whichever is greater
0.050 to 1.00 pu in steps of 0.01
1 to 100% in steps of 1
1.00 to 1.50 pu in steps of 0.01
1.50 to 30.00 pu in steps of 0.01
<¾ cycle at I
Phasor or RMS
0.000 to 30.000 pu in steps of 0.001
97% to 98% of pickup
±0.5% of reading or ±0.4% of rated (whichever is greater)
±1.5% of reading > 2.0  CT rating
IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse,
Short/Very/ Extremely Inverse; I
curve)
Time Dial = 0.00 to 600.00 in steps of 0.01
Instantaneous/Timed (per IEEE)
±3.5% of operate time or ±½ cycle (whichever is greater) from pickup to operate
Modifies pickup current for voltage in the range of 0.1 < V < 0.9 VT Nominal in a fixed linear rela-
tionship
Phasor only
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading or ±0.4% of rated (whichever is greater)
±1.5% of reading
<2%
0.00 to 600.00 s in steps of 0.01
0.00 to 600.00 s in steps of 0.01
<16 ms at 3  pickup at 60 Hz (Phase/Ground IOC)
<20 ms at 3  pickup at 60 Hz (Neutral IOC)
±3% of operate time or ±1/4 cycle (whichever is greater)

–


motor
–


FLA
> 5 × pickup
diff
2
t; FlexCurves™ (programmable); Definite Time (0.01 s base
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION