When can the access door be securely closed during generator operation?

The access door to the generator can be securely closed during operation once the voltage and frequency are verified. This is critical because ensuring that the generator is operating within the specified voltage and frequency ranges is essential for the safe and efficient functioning of the unit. If the parameters are not within the required limits, closing the access door could pose risks as it would prevent immediate access for troubleshooting and emergency measures.

This emphasis on verification before securing the door highlights a safety protocol that protects personnel and equipment by ensuring that the generator is stable and functioning correctly. Therefore, confirming the operational parameters is a prerequisite before fully closing the access door.