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

Are you fascinated by the equipment inside the substation? Use this resource to learn about major substation equipment.

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.

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?

Current transformer

Voltage transformer

Ideal transformer

Power transformer

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

Wavetrap, capacitor coupled voltage transformer, and line tuner

Wave trap, capacitor voltage transformer and line tuner

Wave trap and line tuner

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?

Harmonic filter bank

Install capacitor bank

Voltage regulator

What’s the purpose of a conventional power transformer?

Transform voltage only

Transform power, voltage, and current

Transform voltage and current

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

Disconnect switch

Circuit breaker

Either a breaker or a circuit switcher

Circuit switcher

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

Temporary overvoltage

Switching surge

Phase-to-ground short-circuit

Lightning strike

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

Add current limiting fuses in series on the switchgear

Buy new transformer with higher impedance (%Z)

Add inductor in the transformer neutral

Your score is

The average score is 46%

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

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?

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

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?

What’s the purpose of a conventional power transformer?

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.

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?

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Aleen Mohammed

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