# What is phasor diagram in transformer?

## What is phasor diagram in 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. Io = No-load primary input current.

## How do you draw a phasor diagram for a transformer?

Steps to draw the phasor diagram

1. Take flux ϕ, a reference.
2. Induces emf E1 and E2 lags the flux by 90 degrees.
3. The component of the applied voltage to the primary equal and opposite to induced emf in the primary winding.
4. Current I0 lags the voltage V1′ by 90 degrees.
5. The power factor of the load is lagging.

What happens when transformer is loaded?

Transformer “On-load” When an electrical load is connected to the secondary winding of a transformer and the transformer loading is therefore greater than zero, a current flows in the secondary winding and out to the load.

Why no load current of transformer is not sinusoidal?

Explanation: The no-load current in a transformer is non-sinusoidal. Explanation: The iron core which is used in transformer is subjected to saturation effect. Thus, according to the hysteresis loop, the generation of harmonics at particular saturation level can be identified.

The terminal voltage when full load current is drawn is called full load voltage (VFL). The no load voltage is the terminal voltage when zero current is drawn from the supply, that is, the open circuit terminal voltage. Some portion of voltage drops down due to internal resistance of voltage source.

### How do you draw a vector group of a transformer?

Procedure of Vector Group Test of Transformer

1. Connect neutral point of star connected winding with earth.
2. Join 1U of HV and 2W of LV together.
3. Apply 415 V, three phase supply to HV terminals.
4. Measure voltages between terminals 2U-1N, 2V-1N, 2W-1N, that means voltages between each LV terminal and HV neutral.

What is inductive load in transformer?

Inductive Loads, also called Lagging Loads or Inductive Load Banks or Inductive Reactive Loads or Power Factor Loads, are AC loads that are predominantly inductive in nature so that the alternating current lags behind the alternating voltage when the current flows into the load.

What is practical transformer on load?

ElectronDigital ElectronicsElectronics & Electrical. When a load Impedance is connected across the secondary winding of the practical transformer, then the transformer is said to be loaded and draws a load which flows through the secondary winding and the load.

#### What do you mean by load in transformer?

The load operation of the transformer refers to the working condition when the primary winding is connected to the power supply voltage and the secondary winding is leased to the load. At this time, the secondary side of the transformer also has current flowing.

#### When a sinusoidal exciting current is applied to a transformer What is the mutual flux produced?

If a sinusoidal exciting current is applied to a transformer, the mutual flux produced is Flat top.

What is the phasor of a transformer for inductive load?

PHASOR OF A TRANSFORMER FOR INDUCTIVE LOAD PHASOR OF A TRANSFORMER FOR INDUCTIVE LOAD As load is inductive, secondary current will lag secondary load voltage V2 by some angle. r1 = Primary winding Resistance X1 = Primary winding leakage Reactance r2 = Secondary winding Resistance X2 = Secondary winding leakage Reactance

The phasor or vector diagrams for a transformer on resistive, inductive, and capacitive loads are drawn by taking flux Φ as the reference. Let, V 1 = Primary supply voltage.

What is the transformer on the capacitive load?

The Transformer on the Capacitive load (leading power factor load) is shown below in the phasor diagram. Induces emf E 1 and E 2 lags the flux by 90 degrees. The component of the applied voltage to the primary equal and opposite to induced emf in the primary winding. E 1 is represented by V 1 ’. Current I 0 lags the voltage V 1 ’ by 90 degrees.

## How does the secondary current flow through the transformer?

The current I 2 flows through the secondary winding of the transformer. The magnitude of the secondary current depends on the terminal voltage V 2 and the load impedance. The phase angle between the secondary current and voltage depends on the nature of the load. The Operation of the Transformer on Load Condition is explained below: