GE MiCOM P40 Agile Technical Manual page 36

P44x/EN TD/Hb6
(TD) 2-10
DIRECTIONAL AND NON-DIRECTIONAL
EARTH FAULT PROTECTION
(IN>1, IN>2, IN>3 or IN>4)
Accuracy
DT Pick-up:
IDMT Pick-up
Drop-off:
Definite time stages:
±20 ms or ±2%, whichever is greater
DT reset:
Inverse time stages:
40 ms or ±5%, whichever is greater
IDMT reset:
AIDED DIRECTIONAL EARTH FAULT
(D.E.F.) PROTECTION
Accuracy
Zero Sequence Polarisation
pick-up:
with relay characterist angle = ±90°
Negative Sequence Polarisation
pick-up:
THERMAL OVERLOAD
Accuracy
Thermal alarm pick-up:
Calculated trip time ±10% ∗
Thermal overload pick-up:
Calculated trip time ±10% ∗
Cooling time accuracy
Repeatability:
∗ Operating time measured with applied
current of 20% above thermal setting.
NEUTRAL DISPLACEMENT/ RESIDUAL
OVERVOLTAGE
(VN>1, VN>2)
Accuracy
DT Pick-up:
IDMT Pick-up:
Definite time operation:
±20 ms or 2%, whichever is greater
Instantaneous operation:
IDMT characteristic shape:
±40 ms or 2%, whichever is greater
Reset:
Setting ±5%
1.05 ×Setting ±5%
0.95 × setting ±5%
0.95 × Setting ±2%
0.95 × Setting ±5%
Setting ±10%
Setting ±5%
±15% of theoretical
<5%
Setting ±5%
1.05 x setting ±5%
<50 ms
0.95 × Setting ±5%
MiCOM P40 Agile P442, P444
UNDERCURRENT PROTECTION
(I<1,I<2)
Accuracy
Pick-up:
±10% or 0.025 In, whichever is greater
Drop-off:
Timer accuracy:
±40 ms or 2%, whichever is greater
Reset:
UNDERVOLTAGE
(V<1, V<2, V<3 or V<4)
Accuracy
DT Pick-up:
IDMT Pick-up:
Definite time operation:
±20 ms or 2%, whichever is greater
IDMT characteristic shape:
±40 ms or 2%, whichever is greater
Reset:
OVERVOLTAGE
(V>1, V>2, V>3 or V>4)
Accuracy
DT Pick-up:
IDMT Pick-up:
Definite time operation:
±20 ms or 2%, whichever is greater
IDMT characteristic shape:
±40 ms or 2%, whichever is greater
Reset: 0.98 to 0.995 × Setting ±5%
CIRCUIT BREAKER FAIL AND
UNDERCURRENT
Accuracy
Pick-up:
±10% or 0.025 In, whichever is greater
Operating time:
Definite time operation:
±20 ms or 2%, whichever is greater
VOLTAGE TRANSFORMER
SUPERVISION
Accuracy
Fast block operation:
Fast block reset:
Definite time operation:
±20 ms or 2%, whichever is greater
Technical Data
±5%
<15 ms
Setting ±2%
0.95 × Setting ±2%
1.05 × Setting ±5%
Setting ±1%
1.05 x Setting ±2%
<12 ms
<1 cycle
<1.5 cycles