I have ordered a cvt to solve the plc problem,should be here in about a week.As far as solving the voltage dip problem, I am having a hard to sell the company on the idea of installing RVS on these 2 300hp motors,their reasoning being that we have been starting them DOL for years.Like I...
I originally had the plc and remote i/o power supply hooked up to an APC 500va surge suppressor,and it was still dropping the processor.I thought the APC unit was also a UPS (it says it has baterries)
About 6 months I had a strange problem with this same 300 hp motor.When the operator tried to start up the motor after alunch break,the size 6 starter for this motor blew up for no apparent reason, and all motors on another MCC that were fed from the same service dropped out.The 300hp motor was...
I am going to install a cvt to eliminate the problem of the PLC dropping out for now,,but I think I need to re-evaluate the complete service. I am sure it is overloaded.It's the same old story,the company thinks that power is like a well that never runs out of water,they keep saying (we only...
I"m not sure if there are 6 leads, I think there may only be three. The motors have been rewound in the past. I like your forums and I look forward to being a member,Thanks again
Tahnks for your input I kind of thought that the load that is on that trans bank is on the high side and starting those 300hp motors,Is definitely causing these dips. I will look into installing soft starts for these motors. In the meantime I need to install some thing to maintain the 120v to...
I amhaving a problem with my 120v power dropping to 98.5v when starting up large (300 HP across the line 480v) motor in a sawmill. The lighting trans is fed from the same 480v distribution as the 300 hp motor. Total connected on the 1500 Kva transformer bank is 3132 H.P. Fla 4055, Any suggestions?