• CH3 series modular terminal electrical devices are newly launched series products by Changshu Switch Manufacturing Co., Ltd., following their independently developed CN3/CN5 molded case circuit breakers and CN3 air circuit breakers. Serving as upgraded replacements for the original CH1/CH2 series, they feature the following enhancements:
• CH3N and CH3LN 1P+N models maintain original dimensions but increase rated current to 40A and breaking capacity to 6kA.
• CH3N and CH3LN 1P+N models support optional accessories for industrial multifunctional requirements.
• CH3N and CH3H MCBs allow reversible line connection.
• CH3N-63 extends rated current down to 1A with 1P+N configuration and Type D tripping characteristic.
• 63A-frame RCBOs offer selectable residual operating currents (30mA/100mA/300mA), enriching earth leakage protection.
• Full series standardization with universal accessories.
• Optimized unified human-machine interface and ergonomic design.
Product Series
• GB/T 10963.1 Compliant:
• CH3N-40/63, CH3H-63 MCBs
• Rated voltage: AC 50/60Hz 400V
• Rated current: 1A–63A
• GB/T 14048.2 Compliant:
• CH3H-125 MCBs
• Rated voltage: AC 50/60Hz 400V
• Rated current: 63A–125A
• GB/T 16917.1 Compliant:
• CH3LNN-32, CH3LN-40/63, CH3LH-63 RCBOs
• Rated voltage: AC 50/60Hz 400V
• Rated current: 6A–63A
• Residual operating current: 30mA–300mA
• GB/T 14048.2 Compliant:
• CH3LH-125 RCBOs
• Rated voltage: AC 50/60Hz 400V
• Rated current: 63A–125A
• Residual operating current: 30mA–300mA
• GB/T 14048.2 Compliant:
• CH3Z-63 DC MCBs
• Rated voltage: DC up to 500V
• Rated current: 1A–63A
• GB/T 14048.3 Compliant:
• CH3G-125 modular isolating switches
• Rated voltage: AC 50/60Hz 400V
• Rated current: 32A–125A
All series feature isolation function (symbol: ).
Operating and Installation Conditions
• Ambient Temperature: -5℃ to +40℃
• Altitude: ≤2,000m
• Relative Humidity:
• ≤50% at +40℃; higher humidity permitted at lower temperatures (e.g., ≤90% at 20℃).
• Special measures required for occasional condensation.
• Pollution Degree: Level 2
• Installation Category: Classes II and III
• Extended Operating Conditions: Ambient temperature as low as -25℃ and as high as +70℃ (refer to temperature-current derating table).