Hello everyone,
So... yeah, for the first time in my life I did something really stupid allow me to say.
I was trying to take some measurements when I accidentally
shorted live wire to ground for a split second by touching a metallic object between these two wires coming straight from the UPS line (APC SMART SMC)
UPS was NOT in battery mode at that time.
The fuse in the circuit breaker for that room (25A 240v) popped, nothing else actually tripped. (there is a 10A A/C unit on the same line)
UPS switched to battery mode and all equipment kept working like normal.
Now I'm wondering,
1. Why the RCD didn't trip. Is the breaker really faster than the RCD on short circuit situations?
2. Why the overload breaker on the UPS didn't trip ether
3. There is no short circuit protection on APC UPS? Shouldn't the UPS switch off to protect its self?
4. Is the UPS ok now or there is a hidden damage somewhere?
I have already contacted APC about the incident and they told me if the UPS is working fine and there are no errors then it's fine but you know, something tells me it isn't right.
Any thoughts would be appreciated.