I have a question with regards to LED's. I have a power supply that supplies 3, 41/2, 6, 71/2, 9 and 12VDC (nominal). Materials I'm using:
Aforementioned power supply
Circuit board
~80 Red LED's, "high" intensity (...
Hello all -
I've got a 40 kW resistive load (heating elements) powered by 480V, 3ph. So FLA = 40kW / (480*sqrt(3)) = 48amps.
I require a contactor for this heating load (ie size 1, 2, 3 etc).
Can someone provide a table or chart that shows contactor sizing based on the resistive load?? I...
Hello all
I've got a 208V power source single-phase. Turns out the light fixtures I have are 240V. Any harm in powering the 240V light fixtures from a 208V power source?
Let me know if I can clarify anything.
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Hello all, I've got a 200 HP Motor powered by a 400 kVA transformer with 3.68% impedance. This motor is full-line starting. This motor is the only load on this transformer other than a small lighting panel ~20 kVA.
Having said this, the customer who owns this transformer is telling me the...
Hello all
I am producing a One-Line and am asked to find the "Maximum Phase Current" based on all the loads on the circuit. In my case loads consist of some Transformer Rectifiers, several motors (all less than 10 HP), & some heaters.
I know HOW to find the Maximum Phase Current. My question...
Hello all,
I'm looking to size a transformer to power the following loads. The power source is 460 VAC, 3ph, 60 Hz.
Loads:
Four (4) 1-phase 59.8 kVA Trans-Rectifiers
40.0 HP total of 3-phase motors
72.0 KW total of 3-phase heaters
The Maximum (460 V) Phase-Current I calculated at 470.18...
