Littelfuse, Inc. SE-701 Series – Ground-Fault Monitor SE-701-0D

The SE-701 is a microprocessor-based ground-fault monitor for resistance- and solidly-grounded systems, suitable for applications with significant harmonic content. It features adjustable ground-fault pickup from 1% to 99% of the CT primary rating, selectable time delays from 50 ms to 2.5 s, isolated Form A and Form B output contacts, and a 0-5 V analog output. The SE-701-OD variant operates on 12-24 Vdc, complies with IEEE 50G/N and 51G/N device numbers, and is mounted on DIN rail or surface with optional panel adapters. It includes CT-loop monitoring, harmonic filtering, non-volatile trip memory, and standard test and reset buttons. The unit is CSA certified, UL listed (E340889), CE marked, and C-Tick compliant, with a five-year warranty. Dimensions are 75 mm high, 55 mm wide, and 115 mm deep.