Outline
• CH series modular terminal electrical devices primarily include: CH1/CH2 series Miniature Circuit Breakers (MCBs), CH2Z series DC MCBs, CH1L/CH2L series Residual Current Circuit Breakers (RCCBs), CH1G series Isolating Switches, and accessories. They are widely used in industrial, commercial, and residential applications.
Overcurrent Protection Devices
• CH1/CH2 series MCBs comply with GB 10963 / IEC 60898-1. Available in 1P+N, 1P, 2P, 3P, and 4P configurations. Current range: 1A–63A. Maximum short-circuit breaking capacity: 10kA. Suitable for short-circuit/overload protection and infrequent switching in AC distribution circuits.
• CH2Z series DC MCBs comply with GB 14048.2 / IEC 60947-2. Available in 1P and 2P configurations. Rated current range: 1A–63A. Maximum short-circuit breaking capacity: 10kA. Suitable for short-circuit/overload protection and infrequent switching in DC distribution circuits.
Overcurrent and Residual Current Protection Devices
• CH1L/CH2L series RCCBs comply with GB 16917.1 / IEC 61009-1. Available in 1P+N, 2P, 3P, 3P+N, and 4P configurations. Rated current range: 1A–100A. Maximum short-circuit breaking capacity: 10kA. Provides short-circuit/overload protection while safeguarding against direct/indirect human contact and earth leakage faults in circuits/loads.
Operating and Installation Conditions
• Ambient Temperature
• Upper limit: +40℃; Lower limit: -5℃; Daily average ≤ +35℃.
• Relative Humidity
• ≤50% at +40℃; Higher humidity permitted at lower temperatures. Maximum monthly average relative humidity ≤90% (monthly average minimum temperature ≤ +25℃), accounting for surface condensation.
• Pollution Degree
• Degree 2.
• Installation Category
• Classes II and III.
• Altitude
• ≤2,000m.
CH Series MCB Features
• Modern appearance with ergonomic design.
• Advanced current-limiting structure – rated short-circuit capacity up to 10kA.
• Comprehensive overload and short-circuit protection.
• "Cage-type" terminal structure – ensures secure and reliable wiring.
• Compatible with multiple accessories: auxiliary contacts, alarm contacts, shunt releases, under/over-voltage releases, busbars – enabling functional expansion.
• Modular and standardized design – supports flexible combinations.
• TH35mm standard rail mounting – quick and easy installation.
• All CH series MCBs feature isolation function (symbol: ).