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When you read the volts on a 3 phase linethat should be 230 volts you get 142 volts at each line?
Wiki User
∙ 15y ago
It's hard to understand what you're trying to ask. There could be multiple reasons why you aren't getting the correct voltage, ranging from testing for DC when you should be testing for AC to accidentally measuring the RMS value. Most likely, however, is that you're not measuring with a balanced, three phase load. Tri-phasic power works by splitting the voltage into three separate sin waves that are phase shifted by 120 degrees in relation to each other. Therefore one stays a normal sin wave, one becomes a sin wave phase shifted to 120 degrees, and the other phase shifts to -120 degrees. This means that at any given instantaneous time the average voltage between them is approximately the value of the DC offset. This is only true if you're measuring them with a balanced three phase load, however. If you measure one line at a time, you're going to get erroneous answers. You need to measure tri-phasic power with a balanced three phase load.
Wiki User
∙ 15y ago
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What is the Formula of volte convert into amp?
V/R = I meaning, Voltage (in volts) divided by Resistance (in Ohms) equals Current (in Amperes, a.k.a. Amps
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Each phase supplies 15 kVA. The primary has a line-to-neutral voltage of 277 v so the line current is 15,000 / 277 or 54 amps. The secondary has a line-to-neutral voltage of 120v so the current is 15,000/120 or 125 amps.
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DNA is replicated.
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In an electromagnetic wave, the electric and magnetic fields are perpendicular to each other and are in phase.
Should 2 legs of 480 volt 3 phase each have 480 volts?
Across a 480 volt three phase system, 480 volts should appear across L1 and L2, L2 and L3 and L3 and L1.
Why 380 volts line to line if connect line to neutral is 220 volts?
A voltage of 380 volts is a three phase voltage. On a three phase four wire system, each phase leg to neutral (grounded) will give you 220 volts. This voltage is obtained by dividing the phase voltage by 1.73, as the phase legs are generated 120 degrees from each other. Square root of three is 1.73 divided into 380 equals 220 volts.
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 many amps does 30KW strip heater draw at 208 volts 3PH?
Assuming it is a 208-volt line voltage (as normal in 3-phase) the phase voltage is that divided by sqrt(3), or 120 volts. Each phase has to supply 10 kW so the current on each phase is 83.3 amps.
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.
How many amps does a 2000 watt heater draw at 240 volts on each line?
For a single phase circuit, the equation you are looking for is I = W/E. Amps = Watts/Volts.
When trouble shooting a single pahse 208 volt hid ballast with your voltmeter you read 120 volts to ground on each phase wire but 0 volts across the phase wires what is wrong?
Sounds like both phase wires are connected to the same phase.
How many volts come into your house?
For the USA its 240V (120V on each line/phase).
How does 120 volts come from 208 volts?
208 is a three phase wye connection voltage. To obtain the each individual coil voltage the 208 is divided by 1.73 which equals to 120 volts. Hence you have 3 phase 208 voltage on the phase legs and 120 volts to the wye point which is grounded. This same formula is used on any 3 phase system. 600/347, 480/277, 208/120.
What are the averag volts used in a US Home?
US homes use a 240 volt single phase 'Edison' system. It is a 3-wire (4 with the ground) system. Phase to phase measures 240v, while each phase to neutral measures 120v.
How many volt each phase in three phase?
600 volts between any two wires. The phase has nothing to do with voltages, only current relationship.
If a light bulb is connected between 2 wires and both wires have 300 volts of electrical energy is the light bulb lit?
A light bulb connected between to wires, each having 300 volts to ground that are in phase, will not light, because there is no differential voltage available to do any work. If each wire has 300 volts to ground and are out of phase (600 volts between them) the light bulb will be lit, if it is rated at least for 600 volts, otherwise it will burn out.
