Performance Of Current Protection Functions; Transient Overreach And Overshoot; Phase Overcurrent Protection; Phase Overcurrent Directional Parameters - GE MiCOM P40 Agile Technical Manual

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Chapter 23 - Technical Specifications
3

PERFORMANCE OF CURRENT PROTECTION FUNCTIONS

3.1

TRANSIENT OVERREACH AND OVERSHOOT

Additional tolerance due to increasing X/R ratios
Overshoot of overcurrent elements
3.2

PHASE OVERCURRENT PROTECTION

IDMT pick-up
DT pick-up
Drop-off (IDMT and DT)
IDMT operate
IEEE reset
DT operate
DT reset
Repeatability
Characteristic UK
Characteristic US
Note:
*Reference conditions: TMS = 1, TD = 7, I> = 1A, operating range = 2-20In
3.2.1

PHASE OVERCURRENT DIRECTIONAL PARAMETERS

Directional boundary pickup (RCA +/-90%)
Directional boundary hysteresis
Directional boundary repeatability
3.3

VOLTAGE DEPENDENT OVERCURRENT PROTECTION

Voltage threshold pick-up
Voltage threshold drop-off
Current threshold pick-up
Current threshold drop-off
Note:
These specifications apply to both VCO and VRO
536
+/-5% over the X/R ratio of 1 to 90
< 30 ms
Accuracy
1.05 x Setting +/-5%
Setting +/-5%
0.98 x setting +/-5%
+/-5% of expected operating time or 40 ms, whichever is greater*
+/-5% or 40 ms, whichever is greater
+/-2% of setting or 40 ms, whichever is greater
Setting +/-5%
<5%
IEC 60255-3 1998
IEEE C37.112 1996
Accuracy
+/-2°
< 2°
<2%
Accuracy
Setting +/- 5%
1.05 x setting +/- 5%
Formula +/- 5%
0.95 x formula +/- 5%
P14x
P14xEd1-TM-EN-1

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