Posts Tagged ‘inspect test’

LV and MV Switchgears – How to inspect, test and measure?

May 21st, 2015 | 4 Comments | Posted in Electrical Safety
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Eric S., one of the readers of the blog sent us an article in which he gives information on how to inspect, test and measure low and medium voltage switchgears. But first, he starts with few words on the importance of these checks and maintenance.

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Importance of routine checks and regular maintenance

If switchgears are installed in well ventilated, air-conditioned and clean environmental conditions, they do not require much maintenance.

LV-MV-Switchgears-maintenance

Major inspections are needed and are done only during plant shut downs. These inspections include contact wear identification, checking on interlock operations, observing overload settings, size of the fuses employed, overheating and finally, checking if there is any dirt or corrosion in the switchgear components.

In case of medium voltage switchgears, more concentration should be placed on checking the protective devices, oil levels in the circuit breaker and contact distances of the vacuum bottles and see if they are as per the manufacturer’s specifications.
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