Secondary Voltage Calculator

Calculator

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What is Secondary Voltage?

Secondary Voltage (V₂) is the output voltage achieved on the secondary side of a transformer, derived from the specified 

• Primary voltage (V₁), 
• Primary current (I₁) & 
• Secondary current (I₂).

Secondary Voltage (V₂) is the electrical voltage determined in a transformer‘s secondary winding. The output voltage is given to the load connected on secondary side. 

Secondary Voltage (V₂) is a transformer’s useful output voltage that is influenced directly by the 

• Turns ratio, 
• Load conditions & 
• Input power. 

It guarantees that the connected load obtains the voltage necessary for safe & efficient operation.

The value of V₂ is determined by the applied primary voltage (V₁), the turn ratio across the primary & secondary windings & the load current passing through the transformer.

In actual transformers, the secondary voltage depends on:

Higher load currents may result in a minor dip in V₂ because of winding resistance & leakage reactance.

In an ideal application, the primary current (I₁) ensures magnetic balance (N₁I₁=N₂I₂).

Voltage regulation is the process by which voltage is reduced gradually when under load.

Formula

Secondary Voltage V₂ (V) = [V₁ (V) x (I₁ (A)/I₂ (A))]

Where

V₂ – Secondary Voltage (Volts)

V₁ – Primary Voltage (Volts)

I₁ – Primary Current (Amperes)

I₂ – Secondary Current (Amperes)

How to use the Calculator?

Enter the Primary Voltage (V₁) – The voltage applied to the transformer’s primary winding.

Enter the Primary Current (I₁) – Current drawn from the primary side.

Enter Secondary Current (I₂) – Secondary Current (I₂) is the current supplied to the load from the secondary side.

Calculation – Click Calculate. The secondary voltage (V₂) will be displayed instantaneously by the calculator.

Solved Example

A transformer’s primary voltage is 230 volts, its primary current is 10 amps, and its secondary current is 50 amps. Calculate secondary voltage (V₂)?

Given

Primary Voltage V₁=230V

Primary Current I₁=10A

Secondary Current I₂=50A

Formula

V₂ = V₁ x (I₁/I₂)

Solution

V₂ = 230 x (10/50)

V₂ = 230 x 0.2

V₂ = 46 V

Answer

The transformer’s secondary voltage (V₂) is 46 volts.

Applications for Secondary Voltage Calculation

> Design and testing distribution transformers.

> Electrical maintenance and troubleshooting.

> Relay Protection Settings in LT & HT Systems

> Academic learning for the electrical engineering students.

> Ensure proper load voltage supply for panels, motors & industrial equipment.

The Secondary Voltage Calculator is a valuable tool for electrical professionals. It calculates the output secondary voltage instantaneously after entering only three parameters: primary voltage, primary current & secondary current. 

This makes transformer testing, analysis & learning more efficient & dependable.