It depends how they are connected. If they are connected between line conductors then they are measuring line voltages. If they are connected across phases then they are measuring phase voltages.
You can use a potential transformer (voltage transformer) to measure any voltage you like, phase voltage or line voltage. However, in substations, the line voltage is usually of more interest than the phase voltage.
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This depends on the voltage, and whether it is a three phase or single phase transformer.
The changing magnetic flux in the iron core of the transformer induces a voltage in the windings.
Through the use of the basic transformer voltage equation.
A: Transformer by itself goes not alter the phases the output can be in phase or out of phase depending how you look at it.
transformer is busted; if input voltage is normal you have short circuit or open circuit somewhere
This depends on the voltage, and whether it is a three phase or single phase transformer.
The changing magnetic flux in the iron core of the transformer induces a voltage in the windings.
Through the use of the basic transformer voltage equation.
The voltage phase shift between primary and secondary connections in a transformer is 180 electrical degrees.
A: Transformer by itself goes not alter the phases the output can be in phase or out of phase depending how you look at it.
transformer is busted; if input voltage is normal you have short circuit or open circuit somewhere
A 'polarity test' is conducted on a single-phase transformer, not a three-phase transformer (or transformer bank). The polarity of a single-phase transformer being important if two transformers are to be connected in parallel, or three transformers are going to be connected to form a three-phase transformer bank.'Angular displacement' is, to a three-phase transformer, what 'polarity' is to a single-phase transformer. So you really should be asking about angular displacement, rather than polarity. Angular displacement, or 'phase displacement', is the angle by which the secondary line voltage lags the primary line voltage.Angular displacement can be determined either by drawing a phasor diagram of the three-phase connection and measuring it, or by looking up the connection in a vector-group chart/table -you would nor normally 'calculate' angular displacement.
Maximum load current on a 140KVA, three phase transformer when the output voltage is 115 v phase to phase is: 140kva / sqrt (3) / 115 = 703 Amps. frequency does not matter here.
A single phase 600 to 240 Volt transformer using two phases of the three phase primary.
the necesscity of two three phase transformers operating in parallel are as follows...if the one transformer fails to give supply,then another transformer can be used in parallel and hance,continuity of supply can be maintained.one transformer can be easily take out from the supply for repair & maintanance.if the load on the substation increases beyond the rated values of transformer, then another transformer can be used to share rhe load of the substation.
A grounded neutral will be at earth potential. A floating neutral will be at a voltage dependent upon the voltage imbalance between phases, and the design of the transformer.
If you have a 220v three phase delta system, the phase-to-phase voltage is 220v single phase; hence, no conversion is necessary. Don't worry about 220-240v rating, the voltage rating is nominal. Your 110v single phase has actually already be taken from a center-tapped transformer on your three phase system.