Major Substation Equipment - Learn the Purpose, Cost, and Lead Time to Procure

Need a quick introduction to the major equipment inside the substation? Use this resource to learn about them.

Start with the power transformer image below.

Think you have this covered? Test your knowledge – attempt the quiz at the end of this post.

Power Transformer

Circuit Breaker

Disconnect Switch

Circuit Switcher

Capacitor Voltage Transformer

Current Transformer

Capacitor Bank

Gas Insulated Switchgear

Inductor

Surge Arrester

Wave Trap

Insulator

Major Substation Equipment - Learn the Purpose, Cost, and Lead Time to Procure 1

Substation Major Equipment

It’s only stupid-simple, let’s begin.

An industrial facility is plagued with voltage flicker (due to harmonics) and poor power factor at the service entrance. Which device would you install to fix both issues?

Install capacitor bank

Voltage regulator

Harmonic filter bank

In a distribution substation, the available ground-fault current on the low side of the step-down transformer is excessive, over-dutying the switching equipment. What is your cost-effective solution to reducing the fault current?

Add series inductors

Buy new transformer with higher impedance (%Z)

Add current limiting fuses in series on the switchgear

Add inductor in the transformer neutral

Which combination of devices would you use to implement power line carrier?

Wave trap and line tuner

Wavetrap, capacitor coupled voltage transformer, and line tuner

Wave trap, capacitor voltage transformer and line tuner

You are building an interconnect station, tying wind farm generation to the power grid. At the substation, the sources are tied through a tie-breaker. Which device would you install to make sure the sources are synchronized?

Voltage transformer

Current transformer

Power transformer

Ideal transformer

A transformer develops an internal fault. Which device would you install on the transformer high-side to interrupt fault current?

Circuit breaker

Disconnect switch

Circuit switcher

Either a breaker or a circuit switcher

For which event should a surge arrester operate? Check all that apply.

Temporary overvoltage

Lightning strike

Phase-to-ground short-circuit

Switching surge

What’s the purpose of a conventional power transformer?

Transform voltage only

Transform voltage and current

Transform power, voltage, and current

Your score is

The average score is 45%

Major Substation Equipment – Learn the Purpose, Cost, and Lead Time to Procure

Power Transformer

Circuit Breaker

Disconnect Switch

Circuit Switcher

Capacitor Voltage Transformer

Current Transformer

Capacitor Bank

Gas Insulated Switchgear

Inductor

Surge Arrester

Wave Trap

Insulator

An industrial facility is plagued with voltage flicker (due to harmonics) and poor power factor at the service entrance. Which device would you install to fix both issues?

In a distribution substation, the available ground-fault current on the low side of the step-down transformer is excessive, over-dutying the switching equipment. What is your cost-effective solution to reducing the fault current?

Which combination of devices would you use to implement power line carrier?

You are building an interconnect station, tying wind farm generation to the power grid. At the substation, the sources are tied through a tie-breaker. Which device would you install to make sure the sources are synchronized?

A transformer develops an internal fault. Which device would you install on the transformer high-side to interrupt fault current?

For which event should a surge arrester operate? Check all that apply.

What’s the purpose of a conventional power transformer?

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Aleen Mohammed

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