Pad-mounted transformers are equipped with a _____________ for energizing and de-energizing the transformer

• A. Bayonet Fuse
• B. Switch
• C. Circuit Breaker
• D. Grounding Link

Answer: (A)

When you need to energize or de-energize a pad-mounted transformer, the device that does the switching is the switch on the primary side. This switch (often a load-break or isolating type) lets you connect or disconnect the transformer from the feeder for normal operation or maintenance.

Bayonet fuses are protective elements that interrupt current if a fault occurs; they don’t provide a controlled on/off in regular operation. They may be part of a switch-fuse assembly, but the actual energize/de-energize action relies on the switch. Grounding links are for grounding, and a circuit breaker, while a switching device, is not the standard control element in typical pad-mounted configurations.