ETO ETO Exam papers 📅 Nov 2021

Exam Question

With respect to Generators and Main Circuit Breakers and their protection devices:

(a) Explain the safeties incorporated in Air Circuit Breaker (ACB) of ship's generator and prime mover? (10)

(b) Write short notes on Negative Phase Sequence Relay. (6)

Reference Answer

(a) The followings are the ACB safeties incorporated in ship’s generator:
Under voltage trip (set 50% of rated voltage).
Over current trip. (Long time delay, short time delay and Instantaneous trip).
(i) Long time delay – 105% - 120% of FLC, 20 – 120 sec.

Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.

View plans Browse library

← Browse more questions

Prepare on Android — MeoMock on Google Play