Residual current circuit breaker

The SGM6sm series MCCBs cover frame sizes from 160A to 1600A with 3/4-pole configurations and comply with IEC 60947-2. They operate at 380/400/415V AC, feature a rated insulation voltage of 1000V, and have Icu breaking capacities of up to 85kA (≤250A), 100kA (400-1000A), and 85kA (1600A), ensuring scalable protection across all frame sizes. 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.

The MGW6 series ACB (Air Circuit Breaker) features a rated operational current range from 200A to 7500A, with an ultimate short-circuit breaking capacity up to 150kA and maximum rated operational voltage of 690V. Designed for extreme environments (-45°C to +70°C), this ACB series integrates high-breaking capacity, zero arcing, and multiple intelligent protection functions into one robust solution, delivering superior comprehensive performance to meet diverse application requirements across various scenarios.

To ensure stable operation, perform regular maintenance: Inspect appearance for housing deformation and terminal oxidation; check mechanical components (e.g., operating mechanisms, springs) for wear; test protection devices (overload/short-circuit/undervoltage) accuracy and measure insulation resistance (≥1MΩ); clean residue from arc-extinguishing chambers, measure contact resistance (≤50μΩ) and wear; verify mechanical reliability via no-load operations (≥5 cycles), record key parameters versus historical data; adjust maintenance cycles: annually under normal conditions, shortened post short-circuit interruption.

Mainly used for terminal power distribution circuit of commercial office buildings, residential buildings and general industrial purposes with AC 50Hz and rated voltage up to 240V.Provide overload, short circuit protection and leakage protection for the circuit, and can also perform infrequent switching operations on the circuit under normal conditions.

The circuit breaker should be checked regularly during operation. After the circuit breaker breaks the short-circuit current, the fault should be eliminated first. When the circuit breaker is restored to open and close the circuit, the load should be disconnected first, and then the circuit breaker should be closed/opened: The circuit breaker should select the appropriate current specification, tripping type and copper wire cross-sectional area according to the load power.

The miniature circuit breaker is mainly suitable for terminal power distribution circuit of commercial office buildings, residential buildings and general industrial purposes with AC 50Hz, rated voltage up to 400V, and rated current up to 63A, providing overload and short-circuit protection for the circuit. The circuit breaker adopts modular design, and has the characteristics of exquisite and beautiful appearance, reliable performance and high breaking capacity.

The circuit breaker should be checked regularly during operation. After the circuit breaker breaks the short-circuit current, the fault should be eliminated first. When the circuit breaker is restored to open and close the circuit, the load should be disconnected first, and then the circuit breaker should be closed/opened: The circuit breaker should select the appropriate current specification, tripping type and copper wire cross-sectional area according to the load power.

The SGM6sm series MCCBs cover frame sizes from 160A to 1600A with 3/4-pole configurations and comply with IEC 60947-2. They operate at 380/400/415V AC, feature a rated insulation voltage of 1000V, and have Icu breaking capacities of up to 85kA (≤250A), 100kA (400-1000A), and 85kA (1600A), ensuring scalable protection across all frame sizes. 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.

The MGW6 series ACB (Air Circuit Breaker) features a rated operational current range from 200A to 7500A, with an ultimate short-circuit breaking capacity up to 150kA and maximum rated operational voltage of 690V. Designed for extreme environments (-45°C to +70°C), this ACB series integrates high-breaking capacity, zero arcing, and multiple intelligent protection functions into one robust solution, delivering superior comprehensive performance to meet diverse application requirements across various scenarios.

To ensure stable operation, perform regular maintenance: Inspect appearance for housing deformation and terminal oxidation; check mechanical components (e.g., operating mechanisms, springs) for wear; test protection devices (overload/short-circuit/undervoltage) accuracy and measure insulation resistance (≥1MΩ); clean residue from arc-extinguishing chambers, measure contact resistance (≤50μΩ) and wear; verify mechanical reliability via no-load operations (≥5 cycles), record key parameters versus historical data; adjust maintenance cycles: annually under normal conditions, shortened post short-circuit interruption.

Mainly used for terminal power distribution circuit of commercial office buildings, residential buildings and general industrial purposes with AC 50Hz and rated voltage up to 240V.Provide overload, short circuit protection and leakage protection for the circuit, and can also perform infrequent switching operations on the circuit under normal conditions.

The circuit breaker should be checked regularly during operation. After the circuit breaker breaks the short-circuit current, the fault should be eliminated first. When the circuit breaker is restored to open and close the circuit, the load should be disconnected first, and then the circuit breaker should be closed/opened: The circuit breaker should select the appropriate current specification, tripping type and copper wire cross-sectional area according to the load power.