We currently have a issue with a motor driving a fan heater. these heaters are used for temporary hoardings, building etc. the problem is the motor on the fan is not rated for the area, Class I Div II Group B, C, D.
We are finding it very difficault to find a motor to replace this one with the...
I need some information on installing either the infrared windows (HawkIR) or the Mikron Spyglass lens in existing switchgear or MCC's (13.8KV - 600V). Alot of the articles I have read refer to the device being good for Nema 3 and 4 installations.
What we need to know is:
1)What approvals do...
If a motor has 6 RTD's, is there any standard, other than 2 per phase, that says how they are to be distributed? EG Phase 1 having RTD's 1 and 4, Phase 2 RTD's 5 and 2 and Phase 3 RTD's 6 and 3?
Also, how much of a temperature difference would you see in a stator assuming you had a problem in...
When starting a large motor (14000 HP Synchronous), with a 600/5 zero sequence ground CT around all 3 phases on the feeders leaving the starter, will you see any ground current on start-up?
We are having a discussion here with regarding the load on a 800 1786 RPM 4000 volt motor.
We did an online test on this motor and it indicated that it was running at 94.1% FLA and at a speed of 1789.46. The nameplate (RPM 1786 105 FLA) matched up pretty close to indicating that in fact this...
We Have a vertical motor where the stator and the rotor both are totally immersed in dielectric oil. This morted shorted to ground. When the motor was removed and opened up we noticed that the bushings had picked up and alot of metal filings were in the oil. The centre lead, at its weak spot...
Would it be safe to assume that if the nameplate data on 2 squirrel cage induction motors are the same as far as FLA, voltage, HP, SF, frame and design that the torque curves and thermal curves will be the same?
We are presently in thew middle of a big expansion and the question has come up about a recommendation not do a 4 hour run in on our motors. Any thoughts on this?
