**Contents**show

## What is the secondary voltage on a transformer?

Secondary voltage is **the coil winding supplying the output voltage**. The output voltage of a transformer varies some with varying load resistances, even with a constant voltage input.

## What is the range of secondary voltage?

Common secondary line voltages are **120, 208, 240, 277 and 480 volts**.

## How do you find the secondary voltage of a transformer?

Solve the equation **Vs/Vp = Ns/Np** where Vs is the secondary voltage, Vp is the primary voltage, Ns is the number of secondary windings and Np is the number of primary windings. Divide the number of secondary windings by the number of primary windings, and multiply the source voltage by this ratio.

## What is secondary transformer?

A secondary winding is **the winding of a transformer that receives its energy by electromagnetic induction from the primary winding**. The secondary winding is facilitated with larger-gauge wire because of the increase in current, whereas the primary winding is made up of smaller-gauge wire due to less current conduction.

## How much voltage is in a transformer?

Electric power leaves the distribution substation with voltage ranging typically **between 4,000 and 36,000 volts**.

## How do you calculate peak secondary voltage?

If the RMS voltage is known then the peak voltage can be found using this formula where V_{RMS} is the RMS voltage. Thus, peak voltage is equal to the square root of two times the RMS voltage. For example, find the peak voltage if the RMS voltage is 85 V.

## How do you find the maximum current of a transformer?

Calculate the current from the voltage/amperage (VA) specification or the power rating designated in watts. Both figures mean basically the same thing. **Divide** either the VA or wattage rating of the transformer by the voltage. This will give you the current rating.

## Why CT secondary is earthed?

Because the primary depends on the secondary, when the secondary connection gets grounded or shorted, then **it takes little voltage for the primary to operate**. … If the secondary is not connected to a load, then it tries to maintain the counter magnetic field, and voltage levels may skyrocket.

## Why CT secondary is never kept open?

If **the primary circuit has current flowing the secondary circuit** should never be opened. This can cause very high voltages to occur due to the Ampere-Turns of the primary that start magnetizing the core. This results in the core being saturated through a large portion of the cycle.