Micom P341 - Page 15

Update Documentation P341/EN AD/F43
MiCOM P341 (AD) -11
Sensitive/Low Forward/Over Power
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 50ms whichever is
greater
Repeatability: <5%
Disengagement time: <50ms
tRESET: 5%
Instantaneous operating time: <50ms
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 40ms
whichever is greater*
IEEE reset: 5% or 50ms whichever is greater
DT operation: 2% or 50ms 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 60ms whichever is
greater
Disengagement time: <35ms
Directional accuracy (RCA 90):
2 hysteresis <1%
Repeatability (operating times): <10ms
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: 5% 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 40ms
whichever is greater*
IEEE reset: 5% or 40ms whichever is greater
DT operation: 2% or 50ms 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 40ms
whichever is greater*
IEEE reset: 7.5% or 60ms whichever is
greater
DT operation: 2% or 50ms whichever is
greater
DT reset: 5%
Repeatability: 5%
Wattmetric SEF Accuracy
P = 0W Pick-up: ISEF> 5%
P > 0W Pick-up: P> 5%
P = 0W Drop-off: (0.95 x ISEF>) 5%
P > 0W Drop-off: 0.9 x P> 5%
Boundary accuracy: 5% with 1 hysteresis
Repeatability: 5%
Zero Sequence Polarizing Quantities
Accuracy
Operating boundary Pick-up: 2 of RCA 90
Hysteresis: <3
Vnpol Pick-up: Setting 10%
Vnpol Drop-off: 0.9 x Setting or 0.7V
(whichever is greater) 10%