Out Of Step Protection; Fibre Teleprotection Transfer Times; Autoreclose And Check Synychronism; Phase Overcurrent Protection - GE MiCOM P40 Technical Manual

P446SV
3.3

OUT OF STEP PROTECTION

Accuracy of zones and timers
Operating range
3.4

FIBRE TELEPROTECTION TRANSFER TIMES

The table below shows the minimum and maximum transfer time for InterMiCOM64 (IM64). The times are
measured from opto initialization (with no opto filtering) to relay standard output and include a small propagation
delay for back-back test (2.7 ms for 64 kbits/s and 3.2 ms for 56 kbits/s).
IDiff IM64 indicates InterMiCOM64 signals working in conjunction with the differential protection fibre optic
communications channel. IM64 indicates InterMiCOM64 signals working as a standalone feature.
Configuration
IM64 at 64 k
IM64 at 56 k
IDiff IM64 at 64 k
IDiff IM64 at 56 k
3.5

AUTORECLOSE AND CHECK SYNYCHRONISM

Timers
3.6

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
P446SV-TM-EN-1
Accuracy
As per Distance
Up to 7 Hz
Permissive op times (ms)
13 - 18
15 - 20
22 - 24
24 - 26
Accuracy
+/- 20 ms or 2%, whichever is greater
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
Chapter 26 - Technical Specifications
Direct op times (ms)
17 - 20
19 - 22
23 - 25
25 - 27
689