10 cycle zone 2 time delay

[mbrooke]

I know this isn't typically done as the delay is usually set at 25-35 cycles- but in systems where Zone 2 and Zone 3 act also act as breaker failure protection, is there any inherent risk in security of setting Zone 2 down to 10-12 cycles?


Relays are microprocessor and all breakers are rated 3 cycles opening.