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How do you calculate low phase voltage of a three phase four wire system without using voltmeter?
Wiki User
∙ 13y ago
The formula you are looking for is - phase voltage/1.73 = phase to neutral voltage.
Wiki User
∙ 13y ago
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What is a voltage transformer and mention its function?
A voltage transformer (known as a 'potential transformer' in North America) is classed as an instrument transformer. It is used to reduce the voltage across a high-voltage load to a value that can be read (usually remotely) by an ordinary a.c. voltmeter, while electrically isolating that voltmeter from the high-voltage system for the purpose of safety. It can also be used to supply an input to a protection relay.
What is the purpose of voltage transformer?
A 'voltage transformer' (called a 'potential transformer' in North America) is classified as an 'instrument transformer', and is used to reduce the voltage of an electrical system to a lower, safe, level for the purposes of either operating a voltmeter or supplying a protection relay. At the same time, it electrically-isolates the meter or relay from the high-voltage system.
What size wire is needed for carrying 100 amps under ground?
To calculate the wire size, a system voltage is needed.
Why a DC voltmeter and DC ammeter cannot read AC?
Obviously, it's a voltmeter that measures a.c. voltages. The most common types are a 'moving iron' type or a 'moving coil' type. The latter requires a rectifier circuit. Both scales are calibrated to indicate root-mean-square values. Moving-iron scales are non-linear, whereas moving-coil scales are linear. Moving-iron types are less accurate than moving-coil types.
What happens what the battery light come on while driving your car?
It usually means that your alternator (or generator) is not charging the battery. At this point you need to check system voltage with a voltmeter when the engine is running. You should see at least 13.5 to 14.5 volts. If it is less than that, it is not charging. You can also have the charging checked at a repair shop if you don't have a voltmeter.
Why is the decimal system important?
bescause without the demimal system we wouldn't be able to calculate money or procentige
How do you know if a wire is carring current for the speakers in a vechiles?
With the system powered on and playing sounds measure the voltage at the speaker terminals with an AC voltmeter. If you measure voltage turn off the system and disconnect one of the speaker terminals and measure across the speaker with an ohm meter. If there is any significant conductance the wire is probably carrying current when the system is playing. Better yet take it to a competent technician.
How you calculate voltage drops in a cable knowing resistance or impedance and line current in a 3phase system?
Ohm's Law - V = IR.
Could the problem be the alternator or voltage regulator if a battery won't hold a charge in a Mazda miata?
Could be a bad battery Check the chatging system with a voltmeter--a fully charged battery should read approx. 12.8 volts without engine running With engine running reading should be approx. 13.8-14.2 volts
What is the main advantages of potential transformer?
'Potential transformers' (US terminology) or 'voltage transformers' (UK terminology) are, together with 'current transformers', collectively called 'instrument transformers', and are used to safely measure/monitor voltages and currents in high-voltage systems.Potential transformers are used to reduce the voltage-level of a high-voltage circuit to a lower voltage which can then be read using an ordinary voltmeter; at the same time, it electrically-isolates the high-voltage system for the purpose of safety. Potential transformers, together with current transformers, can also be used to operate wattmeters, or to supply protective relays.
Is there something wrong with your charging system if your alternator gauge reads that it's charging all the time?
Check with a voltmeter A fully charged battery should read approx. 12.8 volts without engine running Should read approx. 13.8-142. volts with engine running if higher than this probably a bad voltage regulator
What is the measured Voltage between L1 and Earth on 3 phase system?
Wouldn't this depend on the voltage of the system? Like if it is a 460 or 208v system it would be 208 or 460v. There should be 3 lines L1 L2 and L3 all measure the input voltage. The wye or star point voltage on a three phase system is the square root of three. This number (1.73) is divided into the three phase voltage to get the voltage to neutral (ground). 208/1.73 = 120 volts, 415/1.73 = 240 volts, 480/1.73 = 277 volts, 600/1.73 = 347 volts.
