For the EIT Exam afternoon session, should I take the general test or discipline specific (EE)?
I'm an EE who has been out of school for 5 years. I'm taking the EIT in April. I've been studying using the Exam review book by Lindeburg. I am thinking that the general test in the afternoon would...
As I understand it, the electronic breaker has short-time delay & long time-delay feature where you set the breaker to hold the fault current for a period of time (for ex. 0.05 to 0.5 seconds) before the breaker trips. This allows for selective coordination because the breaker upstream will...
I have a 6600 to 380 VAC, 250 KVA transformer supplying a motor control center with a 600A breaker on the secondary side. If a bolted short circuit occurs at one of the motor terminals, will the breaker in the MCC bucket trip before the breaker at the transformer? Do I assume 9500A applied to...
When are you supposed to use a suppression device on a relay DC doil? Are there any general guidelines that anyone knows about? In my application, I am using 125 VDC relays with a coil burden of 16 W max. We have placed diodes across these relays in the past, but I am wondering if if its...
