Molded Case Circuit Breaker - MCCB

CM3L mccb molded-case-circuit-breaker transparent

CM3LE (M3L) Earth Leakage MCCB Molded-Case-Circuit-Breaker 63A-800A with transparent case

The CM3L series molded case circuit breakers are mainly applicable to AC 50Hz circuits with a rated working voltage up to 400V and a rated working current up to 800A.

CM3L series is an earth leakage protection type based on CM3 circuit breaker. It provides overload, short circuit AND earth leakage protection, effectively preventing electric shock and fire risk.

It is widely used in places requiring high safety, such as construction sites, hospitals, schools, commercial complexes and residential areas.

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CM3L (M3L) Earth Leakage Circuit Breaker – Description

CM3L series is an earth leakage protection type based on CM3 circuit breaker. It provides overload, short circuit AND earth leakage protection, effectively preventing electric shock and fire risk.

It is widely used in places requiring high safety, such as construction sites, hospitals, schools, commercial complexes and residential areas.

CM3L (M3L) Series Earth Leakage MCCB – Overview

Model Current Leakage Protection
CM3L-100100A30mA / 100mA / 300mA
CM3L-225225A30mA / 100mA / 300mA
CM3L-400400A30mA / 100mA / 500mA
CM3L-630630A100mA / 500mA

Main Technical Parameters

CM3L (M3L) Series Earth Leakage MCCB – Detailed Technical Parameters

Item CM3L-100 CM3L-225 CM3L-400 CM3L-630
Frame Current Inm (A) 100 225 400 630
Rated Current In (A) 10,16,20,32,40,50,63,80,100 100,125,160,180,200,225 225,250,315,350,400 400,500,630
Rated Insulation Voltage Ui (V) 690 800 690 690
Rated Operating Voltage Ue (V) 400 230/400 400 400
Rated Impulse Withstand Voltage Uimp (kV) 6 8 6 6
No. of Poles 3P+N / 4P 3P+N / 4P 3P+N / 4P 3P+N / 4P
Breaking Class L/M L/M/H L/M L/M
Ultimate Breaking Capacity Icu (kA) AC400V 35/50 35/50/65 45/65 45/65
Service Breaking Capacity Ics (kA) AC400V 25/30 25/30/50 22.5/32.5 22.5/32.5
Leakage Current (mA) 30/100/300 30/100/300 30/100/500 100/500
Arc Flash Distance (mm) ≤50 ≤50 ≤100 ≤100
Operating Cycles / Hour 120 120 60 60
Mechanical Life With Load 3000 3000 1500 1500
Mechanical Life No Load 7000 7000 6500 6500
Tripping Type Thermal-magnetic + Leakage Thermal-magnetic + Leakage Thermal-magnetic + Leakage Thermal-magnetic + Leakage
Protection Class IP30 IP30 IP30 IP30
Standards GB14048.2, IEC60947-2 GB14048.2, IEC60947-2 GB14048.2, IEC60947-2 GB14048.2, IEC60947-2

CM3L (M3L) Series – Core Features

  • Integrated earth leakage protection
  • Adjustable leakage current (30mA/100mA/300mA/500mA)
  • Overload, short circuit and leakage triple protection
  • High safety and anti-fire performance
  • Stable zero-sequence current detection
  • Easy installation and maintenance

CM3L (M3L) – Typical Applications

Hospitals & Medical Facilities
Schools & Public Buildings
Construction Site Power
Commercial Complexes
Residential Power Distribution
High Safety Industrial Sites