Thanks to all for the response...I did say that I used a clamp on, but in fact I was reading from the display.
Skogsgurra - So if I am reading your response correctly the output @ 0 Hz is in fact a PWM DC signal across each phase?? The output is in fact regulated (via the control paramters) to...
I have question for someone more familiar with AC Motors/VFDs than I. We are using a VFD to drive an AC motor for a Rotary UPS...I noticed if the drive loses the 0mA reference signal (0-20mA control loop) while the drive is running, it automatically "brakes" the motor...I am assuming this is a...
All,
Due to previous bearing incidents on some rotating machinery we have installed, our customer has requested we monitor harmonics on the LOAD side of the VFD that feeds our equipment (in addition to temperature and vibration analysis which we already do). They have been completely convinced...
Thanks for all the help guys!
I doubt there is actually 100kAIC available, but certainly b/w 65&100kAIC, and I think UL 891 makes you rate the switchboard at the lowest kA rating of any device upstream of a PT (i.e. branch circuit protectors). Like you say, I don't think putting these in...
Guys,
I have a question for anyone with UL expertise. I am modifying a IEC based switchboard design to pass UL891 here in the States. The IEC design allows multiple Mini-Circuit Breakers (UL 1077 "supplementary protective devices") to be tapped downstream of our incoming Utlity/Genset breakers...
