Inhibit Conditions Before Synchronising Mains Breaker - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK

7.9 Inhibit conditions before synchronising mains breaker

This function is used to inhibit the synchronising of the mains breaker after blackout. After blackout, the timer
in menu 2291 ("Delay activate recovery 2") will start to run, and if the mains voltage and frequency are inside
the limits (2281/2282/2283/2284) before the timer runs out, the short interruption timer (menu 2292 "Recovery
del. 1") will be started. When the timer has run out, the synchronising of the MB will start.
Mains failure
Delay act. rec2
2291
Mains condition
Ok 2281-2284
No
Delay act. rec2
Expires 2291
Mains condition
Ok 2281-2284
Yes
Recovery del.2 Recovery del.1
2294
Close Mains
breaker
If the "Delay activate recovery 2" timer runs out, the long interruption timer (menu 2294 "Recovery del. 2") will
start to run.
Examples:
Recovery timer 1 (short interruption timer)
Menu 2291 = 3 s
Menu 2292 = 5 s
That means: if the short interruption timer is set to < 3 s, and the grid is back and voltage and frequency are
inside the acceptable range stated above, then after 5 s the MB can be closed.
DEIF A/S
Yes
2292
Synchronisation
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