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.

Knowledge Check

Substation Major Equipment

It's only stupid-simple, let's begin.

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 inductor in the transformer neutral

Add current limiting fuses in series on the switchgear

Buy new transformer with higher impedance (%Z)

Add series inductors

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

Disconnect switch

Circuit switcher

Circuit breaker

Either a breaker or a circuit switcher

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

Wave trap, capacitor voltage transformer and line tuner

Wave trap and line tuner

Wavetrap, capacitor coupled voltage transformer, and line tuner

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

Switching surge

Lightning strike

Phase-to-ground short-circuit

Temporary overvoltage

What's the purpose of a conventional power transformer?

Transform voltage and current

Transform voltage only

Transform power, voltage, and current

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

Power transformer

Current transformer

Ideal transformer

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

Voltage regulator

Install capacitor bank

Harmonic filter bank

Your score is

The average score is 41%

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

Knowledge Check

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?

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

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

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

What's the purpose of a conventional power transformer?

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?

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

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