FAQs
I am testing the AC trouble on the SLE-ULPS-R Power Supply / Charger. I remove AC power and the trouble light indicates an AC trouble, but the relay did not trip. Is there a delay? If so, how long is the delay? Can its duration be changed?
Yes, there is a 2 hour delay, as required by UL 864 and deemed acceptable by NFPA 72. The delay duration cannot be changed nor set on the SLE-ULPS-R.