Design Engineering

Surge Protectors

By Design Engineering Staff   

General process control surge protector Weidmuller

Weidmuller DIN-rail mountable SPD II and SPD III feature local and remote self-monitoring.

Weidmuller announced its SPD Series, a DIN-rail mountable surge protection family with local and remote self-monitoring. The SPD II is UL 1449 Edition 3 approved to protect AC single and multi-phase distribution circuits with nominal voltages up to 480V, and safely discharge impulse surges up to 40kA (8/20μs) to ground. Weidmuller’s SPD III model, for single-phase devices, provides common-mode protection (between Line, Neutral and Ground), with maximum discharge capacity of 20kA (8/20μs).

Weidmuller’s SPD design is based on high-energy varistors (MOVs) equipped with thermal disconnects and integral failure indicators. A remote signaling contact for disconnection indication is standard on each unit. Varistors are housed in pluggable modules with connections that are mechanically keyed to the base to prevent incorrect arrestor module replacement. Operating temperature range from -50°F to 185°F.


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