SCB thermal stress test

Q.

(Lot 2)
Concerning § 7.2.2 of the Technical Specification (Factory Type Test on SCB):
"2 Test to verify the ?2? capacity of the SCB: The Static CB shall be supplied with a direct current of 53kA dc for a time at least longer than the BPS opening time multiplied by 1.25 without performing current interruption. The test shall be repeated 10 times with a delay of 30 minutes between two consecutive tests."

Question: the delay of 30 minutes might bring to unwanted thermal build up, in a structure designed to operate every 60 minutes. Could you please comment?

A. 

(Lotto 2)
A time of 30min was a quite reasonable time, seen that the test shall be repeated 10 times. Your proposal means that the duration of test is 10 hours instead of 5 hours. I think we can discuss this point in a deeper way during DDP.
For the purpose of submitting the technical proposal it is almost irrelevant.

 

 

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