We intended to replace two old oil circuit breakers for our gas turbine generators (12 KV-2000 A),The breakers timing are as follow:
-Opening time: 50 ms.
-Arcing time: 15 ms.
-Total breaking time is 65 ms.
-closing time: 75 ms.
We got an offer with two new vacuum circuit breakers but the timing ch\s is as follow:
-Opening Time: 33 ... 60 ms.
-Arcing time: 10 ... 15 ms.
-Total Breaking Time: 43 ...75 ms.
-Closing time: 60 ... 80 ms.
The Question is: Are the offered breakers with their different times will be compatible with our purpose and will not affect the protection coordination?
Notes:
The generators are connected to isolated loads (Not connected to National Grid).
Waiting for your soonest reply
Best Regards
-Opening time: 50 ms.
-Arcing time: 15 ms.
-Total breaking time is 65 ms.
-closing time: 75 ms.
We got an offer with two new vacuum circuit breakers but the timing ch\s is as follow:
-Opening Time: 33 ... 60 ms.
-Arcing time: 10 ... 15 ms.
-Total Breaking Time: 43 ...75 ms.
-Closing time: 60 ... 80 ms.
The Question is: Are the offered breakers with their different times will be compatible with our purpose and will not affect the protection coordination?
Notes:
The generators are connected to isolated loads (Not connected to National Grid).
Waiting for your soonest reply
Best Regards