Medium Voltage Circuit Breakers

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).

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Best Regards
 
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