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How do you wire a roman weld transformer 120 kva 1 phase 440 volt from a 3 phase 480 delta-wye connection?
In a 480 volt wye connection you obtain two voltages, 277/480 volts. Any leg to grounded wye point will give you 277 volts. Between any of the legs to each other you will receive 480 volts. Any two legs of a three phase system is classified as single phase supply. From a 480 volt central distribution panel install a two pole breaker sized to the amperage shown on the welding machine. Be sure to use the input current and not the output current to find the correct feeder for the unit.
1 ton of cooling at 480 Volts equals how many amps?
Convert tons to watts, divide by volts. P = I x E. Current = power / volts. 1 ton cooling = 3516.852842067 watts 3517 / 480 = 7.33 amps
Can you single phase 220VAC in place of three phase 220VAC?
Yes, just use L1 and L2 ( just 2 of the 3 legs), or one of the legs to a neutral wire if equipped. Just make sure the voltage is the same as the 220 volts you wish to have with single phase service.
How do you convert 1 phase 240 volt power to 3 phase 480 volt power?
Any two legs of the 480V will give you 240 V Single phase. I apologize for the wrong information here. A friendly member reminded me of the correct answer. I stand corrected. Any two legs would be at 480 single phase. One leg to neutral will give you 277volts not 240 (408/1.73). You would need to install a step down transformer on the 277v line to achieve 240v.
How does a 3-phase 115 volt power supply measure 200 volts in-between each phase?
You should have about 230 volts between any pair of 3-phase service legs: L1-L2, L2-L3, L3-L1. If the voltage measured between any one pair results in low or no voltage, then you have a fuse or circuit problem.
How do I check to make sure a three phase transformer is still in working condition?
Using a properly rated voltmeter and following all safety precautions, check from phase to phase on each phase on the secondary side. phase 1-2 then 2-3 then 1-3 and they should all be within a few volts of each other.
Can you power a 3 phase 240 volts 20 ton air condition unit using the voltage settings 1 phase 127 volts 2 phase 127 volts and 3 phase 127 volts where between any two phases the voltage is 240 v?
If you have a voltage of 127 volts to neutral (ground) then your wye connected three phase leg voltages will have to be 127 x 1.73 = 220 volts. This voltage is within the 10% allowance for voltages as should operate the compressor. As the voltage is lower that specified, the amperage rating when a reading is taken will be higher than that of the equipments nameplate.
On trace heating 415 Volts if you lose a phase on a 3 phase system what percent of heating have you losed?
1/3 rd lost
120 volts 1 phase 30 amps load what wire size?
10 AWG.
How many volts does it take to make 1 horsepower?
Volts don't make power. Watts do. Watts = (volts) x (amps) 1 horsepower = 746 watts
How many amps are in 40 watts?
That depends on circuit voltage. 1 watt is equal to 1 volt times 1 amp.
How much voltage is induce in choke while starting 1 phase fluroscent tube?
11000 volts
