Surge Protection

Commercial Distribution Board Wiring Guide This single phase surge protector wiring diagram guide explains how panel builders should connect 1P+N and 2P SPDs, identify L, N and PE terminals, coordinate…

48V / -48V Telecom DC Power Protection Guide Looking for a 48V DC SPD, -48V DC SPD, or telecom DC surge protector for a cabinet, base station, or DC distribution…

SPD Parameter Guide · Up / Residual Voltage When buyers compare surge protective devices, the Up value is often misunderstood. A lower Up usually means better voltage limitation, but it…

TT Earthing System SPD Selection For a TT earthing system, SPD selection should not be based only on pole count. This guide explains when to specify a 3+1 SPD, how…

BESS SPD Selection Guide Not sure where surge protective devices should be installed in a battery energy storage system? This guide explains BESS surge protection for battery cabinets, DC bus,…

Technical guide for PLC control panels A PLC cabinet may already have an AC surge protective device at the power input, but that does not automatically protect the PLC signal…

Telecom Base Station SPD Guide A telecom base station SPD solution is not a single surge protector. It is a coordinated protection structure for AC input, -48V DC power, signal/data…

EV Charging Station SPD Selection Guide EV charging stations should not be protected only at the charger terminal. A complete SPD design should consider the main distribution board, sub-distribution board,…

OEM / Private Label SPD Buying Guide Private Label SPD Manufacturer Checklist for OEM Buyers Before you put your brand on an SPD, confirm more than the logo. LEEYEE supports…