The SE-601 is a microprocessor-based ground-fault relay for ungrounded dc systems. It provides sensitive ground-fault protection without the problems associated with nuisance tripping. Ground-fault current is sensed using an SE-GRM Series Ground-Reference Module—a resistor network that limits ground-fault current to 25 mA. The SE-601 is used on ungrounded dc systems ranging from industrial 24-Vdc control circuits to 1000-Vdc solar and transportation systems. IEEE Device Numbers DC Overcurrent Relay (76G) Input Voltage See ordering information Dimensions H 75 mm (3.0”); W 55 mm (2.2”); D 115 mm (4.5”) Trip Level Settings 1-20 mA Trip Time Settings 0.05 -2.5 s Output Contacts Isolated Form A and Form B Contact Operating Mode Selectable fail-safe or non-fail-safe Test Button Local Reset Button Local and remote Analog Output 0-5 V Approvals CSA certified, UL Listed (E340889),CE (European Union), C-Tick (Australian) Warranty 5 years Mounting DIN, Surface (standard)Panel (with PMA-55 or PMA-60 adapter