Overview
• CH3 series modular terminal electrical devices are a new product line launched by Changshu Switch Manufacturing Co., Ltd. following their independently developed CM3/CM5 molded case circuit breakers and CM3 air circuit breakers. They serve as upgraded replacements for the original CH1/CH2 terminal devices, featuring:
• CH3N and CH3LN 1N models maintain original dimensions but increase rated current to 40A and breaking capacity to 6kA
• CH3N and CH3LN 1N models support various accessories for industrial multifunctional requirements
• CH3N and CH3H miniature circuit breakers allow reverse feed connection
• CH3N-63 covers rated currents down to 1A with 1N configuration and D-curve tripping
• 63A-frame residual current circuit breakers offer 30mA/100mA/300mA residual operating currents
• Full-range standardized design with universal accessories
• Consistent human-machine interface and ergonomic housing
Product Categories
• CH3N/CH3H miniature circuit breakers (GB/T 10963.1-2005):
Rated voltage AC50/60Hz 400V, rated current 1A–63A
• CH3LN/CH3LH residual current circuit breakers (GB/T 16917.1-2014):
Rated voltage AC50/60Hz 400V, rated current 6A–63A, residual current 30mA–300mA
• CH32 miniature DC circuit breakers (GB/T 14048.2-2008):
Rated voltage DC250V, rated current 1A–63A
• CH3G-125 modular isolating switches (GB/T 14048.3-2008):
Rated voltage AC50/60Hz 400V, rated current 32A–125A
Operating and Installation Conditions
• Ambient temperature: -5℃ to +40℃
• Altitude ≤2000m
• Relative humidity ≤50% at +40℃; ≤90% at +20℃ (special measures required for condensation)
• Pollution Degree 2
• Installation Category II or III
• Extended operating range: -25℃ to +70℃