SOPD Switching Operations 2

Question 1

When performing a switching operation to isolate a faulted line section, what is the FIRST action a system operator should take?

Accepted Answer

Obtain authorization from the Energy Control Center and verify tag-out requirements

Answer

Authorization and tag-out verification must precede any switching action to ensure safety and coordination.

Question 2

A normally-open tie switch between two substations is closed to pick up load from a de-energized feeder. This action is an example of:

Accepted Answer

A transfer switching operation

Answer

Closing a tie switch to transfer load from one source to another is classified as a transfer switching operation.

Question 3

During parallel switching, two sources are momentarily connected together. Which condition MUST be verified before paralleling?

Accepted Answer

Voltage magnitude, phase angle, and frequency must be within acceptable tolerances

Answer

Paralleling without matching voltage, phase angle, and frequency can cause large fault currents and equipment damage.

Question 4

What does the term 'hot-line order' (or 'clearance') mean in switching operations?

Accepted Answer

A written authorization granting a work crew control of a specific circuit or equipment

Answer

A clearance (hot-line order) is a formal authorization that transfers control of equipment to a work crew, ensuring the operator does not re-energize it.

Question 5

Which switching device is designed to interrupt load current but NOT interrupt fault current?

Accepted Answer

Air-break disconnect switch

Answer

Air-break disconnect switches can open and close under no-load or light conditions but lack fault interrupting capability.

(SOPD) System Operator/Power Dispatching Practice Test

(SOPD) System Operator/Power Dispatching Practice Test

SOPD Switching Operations 2