How can you tell if a surge protection device has failed?

Surge protection devices are now commonplace within electrical installations. But how can you tell easily if they are connected and working? In this video, we build a remote SPD indicator which connects to the auxiliary volt free contacts found on most three-phase surge protection devices.

Without this simple SPD indicator users are reliant upon someone checking the tiny indicator flags on the surge protectors.

We build this simple remote indicator using a Contactum three phase distribution board with surge protection and metering extension box.

🕐 TIME STAMPS 🕕
======================
00:00 Three phase surge protection are they working?
00:39 Making a three-phase surge protection indicator
01:01 Surge device volt free auxiliary contacts
01:44 Surge indicator circuit schematic
02:46 Connecting the SPD indicator within a three-phase board
04:48 Gary loves a ferrule BTW
05:14 Testing the indicator circuit
======================

== AD ===========================
🧰 Components used to build the SPD indicator

RS PRO, Panel Mount Green LED Pilot Light, 22mm Cutout, IP65, 230 V ac
https://www.anrdoezrs.net/links/92936...

RS PRO, Panel Mount Red LED Pilot Light, 22mm Cutout, IP65, 230 V ac
https://www.anrdoezrs.net/links/92936...

RS PRO Grey Plastic Push Button Enclosure - 2 Hole 22mm Diameter
https://www.anrdoezrs.net/links/92936...


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Gordon Routledge CEng MIET - technology editor eFIXX

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