Schneider Electric S33681 PowerPacT Time Delay Switch

The Schneider Electric S33681 Time Delay Unit is an external time-delay accessory for undervoltage release that fits MasterPact NT/NW, ComPacT NS, and PowerPact frames, including PowerPact J, H, M, P, R, and L. It accepts control voltages of 100–130 V AC or DC at 50/60 Hz and delivers an adjustable delay of 0.5 to 3 seconds, allowing precise sequencing of UVR events in protection schemes. As a spare-part module, it extends UVR functionality across Schneider Electric’s PowerPact and MasterPact families, enabling technicians to tailor undervoltage response to specific system coordination requirements. The unit is designed to be installed into the UVR circuit to introduce a configurable delay before tripping, helping to coordinate UVR with upstream relays and other protection devices. Typical industrial applications include large power-distribution assemblies and manufacturing facilities where UVR timing is part of a broader protection strategy.