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How to connect surge arrester with equipment?
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Answer Posted / razif matsaat
Depending on the configuration, the surge protection device (SPD) may be connected in shunt mode or in series. usually, the latter has a set of surge diverting components and a set of high frequency filter to further attenuate high frequency component of lightning surge current. The simpler one;the shunt type; usually has simpler surge diverting component such as Metal Oxide Varistor (MOV) and/or Zener Diode and/or Gas Discharge Tube (GDT).
You will now how to connect by looking of the cables poking out of the SPD. If you have (for single phase) only a set of L,N,G, it's usually shunt type. If you see 2 sets, well of curse it's the series one. Hint: look at the diagram of connection supplied with the device.
Be extra cautious when you do termination of the grounding cable though. From my experience, the grounding termination (cable length, bending,size and route) is very important regardless of how good your SPD you choose.
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