Littelfuse, Inc. SE-701 Series – Ground-Fault Monitor SE-701-03

The SE-701-03 is a microprocessor-based ground-fault monitor for resistance- and solidly-grounded systems, designed for applications with significant harmonic content. It operates on 24 Vac power, features adjustable ground-fault pickup (1-99% of CT primary rating) and time delay (50 ms to 2.5 s), and includes isolated Form A and Form B output contacts. The device has a 0-5 V analog output, CT-loop monitoring, harmonic filtering, and a standard test and reset button. It mounts via DIN rail or surface, measures 75 mm H × 55 mm W × 115 mm D, and is CSA certified, UL Listed (E340889), CE marked, and C-Tick compliant.