Micom ALSTOM P341, Technical Data Sheet

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P341 Technical Data Sheet
16
P341 Software versions 36 & 71J
Protection functions
Reverse/low forward/overpower
Accuracy
Pick-up: Setting
±
10%
Reverse/Over Power Drop-off:
0.95 of setting
±
10%
Low forward power Drop-off:
1.05 of setting
±
10%
Angle variation Pick-up:
Expected pick-up angle
±
2 degree
Angle variation Drop-off:
Expected drop-off angle
±
2.5 degree
Operating time:
±
2% or 50 ms whichever is
greater
Repeatability: <5%
Disengagement time: <50 ms
tRESET:
±
5%
Instantaneous operating time: <50 ms
Sensitive/low forward/overpower
Accuracy
Pick-up: Setting
±
10%
Reverse/Over power Drop-off:
0.9 of setting
±
10%
Low forward power Drop-off:
1.1 of Setting
±
10%
Angle variation Pick-up:
Expected pick-up angle
±
2 degree
Angle variation Drop-off:
Expected drop-off angle
±
2.5% degree
Operating time:
±
2% or 50 ms whichever is
greater
Repeatability: <5%
Disengagement time: <50 ms
tRESET:
±
5%
Instantaneous operating time: <50 ms
Directional/non-directional
overcurrent
Accuracy
Pick-up: Setting
±
5%
Drop-off: 0.95 x Setting
±
5%
Minimum trip level (IDMT): 1.05 x Setting
±
5%
IDMT characteristic shape:
±
5% or 40 ms
whichever is greater*
IEEE reset:
±
5% or 50 ms whichever is greater
DT operation:
±
2% or 50 ms whichever is
greater
DT Reset:
±
5%
Directional accuracy (RCA
±
90
°
):
±
2
°
hysteresis 2
°
Characteristic UK: IEC 6025-3…1998
Characteristic US: IEEE
C37.112…1996
* Under reference conditions
Negative phase sequence
overcurrent
Accuracy
I2>Pick-up: Setting
±
5%
I2> Drop-off: 0.95 x Setting
±
5%
Vpol Pick-up: Setting
±
5%
Vpol Drop-off: 0.95 x Setting
±
5%
DT operation:
±
2% or 60 ms whichever is
greater
Disengagement time: <35 ms
Directional accuracy (RCA
±
90
°
):
±
2
°
hysteresis <1%
Repeatability (operating times): <10 ms
Thermal overload
Accuracy
Setting accuracy:
±
5%
Reset: 95% of thermal setting
±
5%
Thermal alarm Pick-up:
Calculated trip time
±
5%
Thermal overload Pick-up:
Calculated trip time
±
5%
Cooling time accuracy:
±
6% of theoretical
Repeatability: <2.5%
Directional/non-directional earth
fault
Earth fault accuracy
Pick-up: Setting
±
5%
Drop-off: >0.85 x Setting
±
5%
IDMT trip level elements: 1.05 x Setting
±
5%
IDMT characteristic shape:
±
5% or 40 ms
whichever is greater*
IEEE reset:
±
5% or 40 ms whichever is greater
DT operation:
±
2% or 50 ms whichever is
greater
DT reset:
±
5%
Repeatability: 5%
SEF accuracy
Pick-up: Setting
±
5%
Drop-off: 0.95 x Setting
±
5%
IDMT trip level elements: 1.05 x Setting
±
5%
IDMT characteristic shape:
±
5% or 40 ms
whichever is greater*
IEEE reset:
±
7.5% or 60 ms whichever is
greater
DT operation:
±
2% or 50 ms whichever is
greater
DT reset:
±
5%
Repeatability: 5%