Q68.

With reference to the circuit breaker for an a.c. generator A. Describe the preventive maintenance carried out on the circuit breaker for an A.C Generator. B. Explain the sequence of events that might occur if the breaker opens on a short circuit and state the check you would require following such event. C. Give a safe procedure to follow should a main circuit breaker fail to open under fault condition.

2009/SR7

2009/SR3

2008/SR6

£ 2007/SR5

2006/SR9

2006/SR01

2011/SR2

2010/SR6

2012/SR7

2012/SR8

2013/SR8

2013/SR11

2014/SR01

2014/SR12

2016/SR02

2016/SR06

2017/SR12

2018/SR01

2018/SR06