How do you calculate current in a 3 phase transformer?
the following figure presents a nameplate of a three phase transformer….Using the aforementioned formula, let’s confirm this rating:
- Primary Voltages or High Voltages (H.V) is 11000 volts.
- Primary Current (current on High Voltage side) is 5.25 amps.
- KVA = (√3. V x I) /1000= (1.732 × 11000 × 5.25)/1000=100 KVA.
What is the significance of vector relationship in 3 phase transformer?
The vector group indicates the phase difference between the primary and secondary sides, introduced due to that particular configuration of transformer windings connection. The Determination of vector group of transformers is very important before connecting two or more transformers in parallel.
What is vector diagram in electrical?
A vector diagram is a diagram on which one or more vectors can be represented. On a vector diagram, alternating quantities are represented by an arrow. The length of the arrow represents the rms value of the alternating quantity.
What is vector diagram?
Vector diagrams are diagrams that depict the direction and relative magnitude of a vector quantity by a vector arrow. Vector diagrams can be used to describe the velocity of a moving object during its motion. In a vector diagram, the magnitude of a vector quantity is represented by the size of the vector arrow.
How do you find the vector group of a transformer?
Based on the windings’ connection, the vector group of the transformer is determined. The transformer vector group is indicated on the Name Plate of transformer by the manufacturer.
How do you select a vector group for a transformer?
The first criterion to consider in choosing a vector group for a distribution transformer for a facility is to know whether we want a delta-star or star-star. Utilities often prefer star-star transformers, but these require 4-wire input feeders and 4-wire output feeders (i.e. incoming and outgoing neutral conductors).
What is the diagram of transformer?
The phasor or vector diagrams for a transformer on resistive, inductive, and capacitive loads are drawn by taking flux Φ as the reference. Let, V1 = Primary supply voltage. E1 & E2 = Primary and secondary induced emf’s.
How do you find the current in a transformer?
If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps). For a 240-volt, 3000-watt transformer, the current is 12.5 amps.
How do you calculate current per phase?
Phase current I(P) in Amps is equal to line current I(L) in Amps divided by root 3. Example: Calculate the phase current of the delta connected alternator output line current of 1500 Amps. I(P) = 1500 / 1.732 = 866 Amps.
What is a 3 phase vector diagram?
Three-phase vector diagrams are commonly used to represent 3 phase transformers are known as transformer vector diagrams. The voltages of a three phase system is shown in the figure below:
What is the connection of a three phase transformer?
The three phase transformer can be connected in various ways and the transformer’s is connection is determined using its vector group. The transformer’s vector group is depending on the following factor:
How many phases are there in a voltage transformer?
Three Phase Transformers. Thus far we have looked at the construction and operation of the single-phase, two winding voltage transformer which can be used increase or decrease its secondary voltage with respect to the primary supply voltage. But voltage transformers can also be constructed for connection to not only one single phase,…
What does the Transformer Vector Group show?
Actually, The transformer vector group shows the phase difference between the primary and secondary sides of the transformer. What is the use of transformer vector group? Basically transformer vector group is used to find the high voltage and low voltage windings arrangement of three phase transformers.