SGM6-630HU

High Voltage AC Moulded Case Circuit Breakers are mainly used for providing indirect contact protection against fatal electric shocks, distributing electric energy, and protecting circuits and power supply equipment from faults such as overload, short circuit, and under-voltage. They are also applicable to the infrequent starting of motors and provide overload, short circuit, and under-voltage protection for motors.

Cambered projecting panel
Anti-touch transparent cover
Anti-flame&insulated enclosure
Ergonomic handle
Tripping button
Heat dissipation pattern on sides

Product
Description

The SGM6 HU-250 and SGM6 HU-630 MCCBs cover frame sizes of 250A and 630A respectively, and with IEC60947-2 compliance. They feature a rated insulation voltage of 1000V and Icu breaking capacities of 25kA (250A) and 36.5kA (630A), ensuring precise protection tailored to each frame size.The series also supports standard accessories (auxiliary contacts, shunt trips) and delivers reliable protection for industrial power systems.

To ensure long-term reliable operation of Molded Case Circuit Breakers (MCCBs), follow strict maintenance protocols: Before work, disconnect power and verify de-energization while wearing insulated gear. Inspect housing for cracks/discoloration in dry conditions; tighten terminals to manufacturer specs with torque wrench. Operate handle 5+ times to verify smooth switching/trip reset. Test insulation (≥1MΩ dry/≥0.5MΩ damp) and contact resistance (≤50μΩ; replace if exceeded), calibrate protection settings. Clean arc chambers and test shunt trip. Maintain annually (normal) or every 6 months (humid/dusty areas), with immediate post-fault checks. Record all data vs historical benchmarks.