Exam Question
1. a) What are safety incorporated in ACB of ship's generator and prime mover?
(10)
b) Explain the procedure to test reverse power relay.(6)
ETO
ETO Exam papers
📅 Mar 2026
Reference Answer
### Part A: Safeties in ACB of Ship's Generator and Prime Mover
#### 1. Safeties Incorporated within the Air Circuit Breaker (ACB)
These are protective devices and features integral to the ACB, designed to protect the generator, distribution system, and personnel.
* **Overcurrent Protection:** This is the primary protection against excess current. It is typically managed by an electronic trip relay (ETU) and has several stages for discrimination:
#### 1. Safeties Incorporated within the Air Circuit Breaker (ACB)
These are protective devices and features integral to the ACB, designed to protect the generator, distribution system, and personnel.
* **Overcurrent Protection:** This is the primary protection against excess current. It is typically managed by an electronic trip relay (ETU) and has several stages for discrimination:
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