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I'm attaching a diagram with surge arresters put on each line. Most of the experts in the field say a proper defense against lightnings and switching events has three surge arresters - one between phase and ground, one between neutral and ground, and one between phase and neutral. So what is the proper way of connecting the surge arrester between phase and neutral?

enter image description here

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  • \$\begingroup\$ Why not check the datasheet of the surge arrester? \$\endgroup\$ – vidarlo Aug 27 '19 at 17:03
  • \$\begingroup\$ There is no datasheet showing how to mount it between phase and ground or if it's allowed ... \$\endgroup\$ – 1000Gbps Aug 27 '19 at 17:05
  • \$\begingroup\$ If you have a specific model in mind, include a link to it, and if possible a datasheet. Manufacturers datasheet should be followed. \$\endgroup\$ – vidarlo Aug 27 '19 at 17:05
  • \$\begingroup\$ If you don't have a datasheet, then you don't know what you have purchased. \$\endgroup\$ – rdtsc Aug 27 '19 at 17:16
  • \$\begingroup\$ Do you even need one between line and neutral if you have some going to ground? In an over voltage condition on line or neutral the overvoltage current would be sent to ground, and not be a problem. I would think that if there is an overvoltage on line, you wouldn't want to send it back to neutral. \$\endgroup\$ – Voltage Spike Aug 27 '19 at 17:47

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