Protection Elements - GE M60 Instruction Manual

2.2 SPECIFICATIONS
2.2SPECIFICATIONSSPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
The operating times below include the activation time of a trip rated form-A output contact unless otherwise indi-
cated. FlexLogic™ operands of a given element are 4 ms faster. This should be taken into account when using
NOTE
FlexLogic™ to interconnect with other protection or control elements of the relay, building FlexLogic™ equations, or
2
interfacing with other IEDs or power system devices via communications or different output contacts.
THERMAL MODEL
Thermal overload curves: standard curve (Motor), FlexCurve™,
Standard curve (motor) time multiplier: 0.00 to 16.00 in steps of
FlexCurve™ and IEC curve time multiplier: 0.00 to 600.00 in steps
Thermal overload pickup: pu = overload factor × FLA
Overload factor (OF):
Motor full load current (FLA): 0.050 to 1.000 pu in steps of 0.001
Standard overload curve, cutoff effect:
t ------------------------------------------------------------------------------------------------------------------------------------------------
=
trip
I

motor
------------- - 1
0.02530337 ×

FLA
Standard overload curve, shift effect:
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
t
=
trip
I

motor
× ------------------------ - 1
0.02530337

×
OF
Motor rated voltage:
Thermal model biasing: current unbalance, RTDs
Thermal model update rate: 2 power cycles
Thermal capacity level accuracy: ±1%
Stopped/running time cool constants: 1 to 65000 min. in steps of 1
Stopped/running time cool constants decay: exponential
Hot/cold safe stall ratio: 0.01 to 1.00 in steps of 0.01
Current accuracy:
Current source:
Timing accuracy:
Timing accuracy for voltage dependent overload:
STATOR DIFFERENTIAL
Pickup:
Slope 1 and 2:
Break 1:
Break 2:
Operate time:
2-10
standard curve (Motor) with voltage
dependent function, IEC curve
0.01
of 0.01
1.00 to 1.50 in steps of 0.01
TD × 2.2116623
2 I
 
motor
-------------- 1
0.05054758 ×
– + –
 
FLA
×
TD 2.2116623
2
I
 
motor
× ------------------------ - 1
0.05054758
– +
 
FLA OF
1 to 50000 V in steps of 1
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 > 5 × pickup
diff
M60 Motor Protection System
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:
Timing accuracy:

–

×
FLA
PHASE/NEUTRAL/GROUND IOC
Current:
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading or ±0.4% of rated
> 2.0 × CT rating
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timing accuracy:
2 PRODUCT DESCRIPTION

2.2.1 PROTECTION ELEMENTS

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/
2
Extremely Inverse; I t; FlexCurves™
(programmable); Definite Time (0.01 s
base curve)
Time Dial = 0.00 to 600.00 in steps of
0.01
Instantaneous/Timed (per IEEE)
Operate at > 1.03 × actual pickup
±3.5% of operate time or ±½ cycle
(whichever is greater)
Phasor only
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
(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)
Operate at 1.5 × pickup
±3% or ±4 ms (whichever is greater)
GE Multilin