Question

Bus bar protection is usually not provided for which type of system?

• A. Extra high voltage systems
• B. Small distribution substation
• C. Power house bus bars
• D. \(132\ \text{kV}\) substations

Hint:

Bus bar protection is mainly used in important high-voltage substations and power stations, not usually in small distribution substations.

Answer 1

The Correct Option is B

Concept: Bus bar protection is used to protect bus bars from internal faults. It is important in large and high-voltage substations where bus bar faults can cause serious interruption.

Step 1: In extra high voltage systems, bus bar faults are very serious.

Step 2: Power house bus bars also require fast and selective protection.

Step 3: \(132\ \text{kV}\) substations usually have important bus bars, so bus bar protection is generally provided.

Step 4: Small distribution substations have simpler and less costly arrangements.

Step 5: Due to cost and lower system importance, separate bus bar protection is usually not provided in small distribution substations. Therefore: \[ \boxed{\text{Small distribution substation}} \]