I have a few details 480volt, 3phase, 9 lead motor with all nine leads terminating at 3 contactors.
DOL line starting energizes 2 contactors
they time out/drop out and 2 contactors accelerate motor after motor reaches speed 2 contactors close running motor at speed.
I have been told motor...
I have inherited a motor with a nameplate marked
Y/YY
460v
30/93A
I am not familiar with Y/YY on nameplate and also not sure why different amperage ratings with only one voltage rating any insight would be appreciated.
Thanks in advance for any replies. If...
If I have a motor 150' away from the contactor controlling it and I measure current at the peckerhead and then take a second measurement at the contactor assuming no change in load and regardless of wiring methods should the measurements be identical?
Is it relevant where you measure current in...
Hello,
I have (2) vfd's controlling 2 motors(conveyors) with a input voltage of 460 volts in real life I measure 494 volts at the input. The drive manufacturer says voltage input in good for +10%. 460*1.10=506
But over the past 2 weeks both drive's have faulted on a overvoltage fault numerous...
I need a sensor that is capable of sensing a lift that moves from 1-6 feet from where the sensor is mounted.It also is being used in a washdown area with complete submersion of sensor in water on a daily basis for approximately 2 minutes.The ideal sensor would be 24v d.c. with 4-20ma output.Any...
A machine has a 3 phase 460 volt feed at the disconnect I measure from phase A-B 460volt, phase A-C 460volt,and phase B-C 460volt.So far so good but when I measure from A phase to ground 70 volts,B phase to ground 450volt and C phase to ground 450 volt.When I measure to ground I am referring to...
A customer had a 5hp 480v 3 phase motor in a class 1 division 1 area that was being relocated.It is controlled by a
xp manual starter.While disconnecting from original location I found 2 wires for thermostat in motor junction box that were wirenutted together.The question is do I need to use...
A customer has a 480 3 phase radio frequency sonic weld machine used to join belts.When machine is in heat cycle multiple problems occur.Problem#1 different machine with dc motor variable speed control goes haywire speeds up and down uncontrollably.Problem#2 sonic weld machine has 2 timers that...
When installing drive cable with insulated green ground wire in addition to bare conducter and shield. What is the correct thing to do with bare conductor and shield?Prior experience with instrumentation says to isolate bare conductor at one end to eliminate ground loop.Thanks in advance for help.
