In modern electrical installation safety systems,Rccb Circuit Breaker plays an irreplaceable protective role different from conventional MCB breakers. Many users often confuse Mcb Rccb functional differences: MCB focuses on overload and short-circuit protection for circuits, while Rccb specializes in residual current leakage detection and electric shock prevention. Together with RCBO and other protective devices classified as Rcd Rcbo Rccb series products, they build a complete electrical safety protection system for residential, commercial and new energy equipment.
Circuit breakers handle the circuit protection, while RCDs ensure that current imbalances don’t put lives at risk. It’s like a dynamic duo working together to keep both circuits connected and people safe.
With the rapid popularity of inverter heat pumps, frequency conversion equipment and new energy electrical systems, ordinary AC-type RCCBs cannot detect smooth DC leakage and high-frequency current faults, easily causing protection failure or blind trip risks. To solve the pain points of modern high-frequency equipment power consumption, Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) launches the CJL1-125-HP series Type B HP RCCB, a professional high-frequency heat pump special residual current circuit breaker that complies with international standards and British BS 7671 specifications.
Basic Introduction to RCCB
RCCB (Residual Current Circuit Breaker) is a core leakage protection device in low-voltage electrical systems. Unlike Mcb Rccb matching applications, MCB protects circuit overload and short circuit faults, while Rccb Circuit Breaker monitors unbalanced residual current of the circuit in real time. Once leakage current causes current imbalance, it will automatically cut off the power supply to avoid personal electric shock and electrical fire hazards.
Conventional RCCBs are only applicable to ordinary AC leakage scenarios. However, modern heat pumps, frequency converters and inverter equipment will produce smooth DC residual current and high-frequency leakage above 1kHz. Ordinary protective devices are prone to failure. As an upgraded high-performance model in theRcd Rcbo Rccb product line, C&J Electrical CJL1-125-HP Type B HP RCCB perfectly adapts to high-frequency and DC leakage protection scenarios of new energy equipment, filling the protection gap of traditional RCCBs.
CJL1-125-HP Series RCCB Product Overview
CJL1-125-HP series high-frequency heat pump special RCCB developed by C&J Electrical is a Type B HP professional residual current circuit breaker complying with IEC61008-1 and IEC62423 international standards and BS 7671 British electrical specifications. It adopts electronic type with auxiliary electromagnetic structure design, featuring stable detection performance and strong anti-interference ability.
This Rccb product covers 1P+N and 3P+N pole specifications, with rated current of 25A, 40A and 63A, and supports three mainstream residual current specifications of 30mA, 100mA and 300mA. Different from ordinary Type B RCCBs limited to 1kHz frequency detection, CJL1-125-HP can operate stably in high-frequency scenarios above 20kHz, with a minimum tripping threshold of 150mA for frequency signals above 1kHz. It is specially customized for heat pump inverter equipment and is the preferred safety protection device for modern high-frequency electrical systems.
Core Structural Characteristics & Functional Features
CJL1-125-HP series Rccb Circuit Breaker has innovative structural design and comprehensive protective functions, fully adapting to the complex current characteristics of heat pumps and frequency conversion equipment:
- Full DC Fault Detection Capability: It can accurately detect and protect smooth DC residual current faults that cannot be identified by ordinary RCCBs, completely solving the leakage protection blind spot of inverter electrical equipment.
- High-Frequency Adaptive Operation: Effectively operates at high frequencies above 20kHz, perfectly matching the high-frequency leakage characteristics of heat pump compressor inverter operation, avoiding protection failure and nuisance tripping.
- Strict Standard Compliance: Fully compliant with BS 7671 electrical installation standards, meeting the mandatory protection requirements of modern building electrical and heat pump engineering.
- Professional Heat Pump Customization: As a dedicated Type B HP RCD for heat pump systems, it supports stable tripping protection for multiple complex residual currents such as AC, pulsating DC and smooth DC, with accurate 150mA threshold for high-frequency current above 1kHz.
- Ergonomic Appearance Design: Adopts cambered cover and handle structure, comfortable to operate and beautiful in appearance. Equipped with transparent flip cover and label window, as well as independent contact position indication window, facilitating real-time status observation and equipment management.
- Accurate Overload Fault Protection: When circuit overload occurs, the handle automatically trips and stays in the middle position, which is convenient for staff to quickly judge fault points and repair circuits; manual operation cannot stay in the middle position, avoiding misoperation risks.
- Multi-Dimensional Safety Protection: Integrates earth fault protection, electric leakage protection and circuit isolation functions, with high short-circuit current tolerance to resist instantaneous short-circuit current impact.
- Anti-Error Touch Structure: Equipped with finger-protection wiring terminals to prevent electric shock accidents caused by accidental touch during wiring and maintenance.
- High-Strength Flame Retardant Shell: The shell and internal components are made of high-temperature resistant, impact resistant and high flame retardant engineering plastics, with strong environmental adaptability and long service life.
- Stable Anti-Interference Performance: Dynamic and wire pressure structures are independent, free from external interference and grid voltage fluctuation, ensuring stable and accurate tripping action in complex power environments.
- Automatic Fault Tripping: When earth fault or leakage current exceeds the rated threshold, the circuit will be automatically cut off instantly to eliminate potential safety hazards in the first time.
Complete Technical Data
CJL1-125-HP series Rcd Rcbo Rccb has standardized and precise technical parameters, fully meeting international industrial standards and heat pump engineering application requirements:
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Technical Items
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Specifications
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Executive Standard
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IEC61008-1, IEC62423
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Product Type
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Electronic type (Auxiliary Electromagnetic type)
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Residual Current Characteristic
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Type B
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Pole Number
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1P+N, 3P+N
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Rated Current
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25A, 40A, 63A
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Rated Voltage
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AC 240/415V
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Rated Frequency
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50/60Hz
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Rated Residual Operating Current
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0.03A, 0.1A, 0.3A
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Rated Limited Short Circuit Current
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10kA
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Mechanical & Electrical Life
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4000 cycles
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Max Wiring Section
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25mm² conductor
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Installation Method
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35.5mm guide rail / vertical installation
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Protection Class
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IP20
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Tightening Torque
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2.0Nm
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Professional Tripping Performance of Type B HP
On the basis of Type A standard specifications, CJL1-125-HP Type B HP Rccb has upgraded comprehensive tripping capabilities for complex residual currents such as high-frequency AC, pulsating DC and smooth DC, ensuring full-scenario fault protection:
- High-Frequency AC Protection: For sinusoidal AC residual current below 1000Hz, the tripping current strictly complies with standard table requirements, with a maximum breaking time ≤0.3s for sudden residual current; S-type products ensure stable delayed tripping performance.
- Superimposed Smooth DC Protection: It can effectively trip for rated frequency AC current superimposed with 0.4In or 10mA smooth DC current, with AC tripping current not exceeding the rated residual current value.
- Pulsating DC Superimposed Protection: For pulse DC current superimposed with smooth DC fault current, the tripping current is accurately controlled within the standard range to avoid protection failure.
- Rectifier Circuit Current Adaptation: It can stably detect and trip for rising pulsating DC current generated by two-phase and three-phase rectifier circuits, with a protection range covering 0.5In to 22In.
- Pure Smooth DC Protection: It supports stable tripping for continuously rising smooth DC residual current, filling the protection gap of ordinary RCCBs for DC faults.
- Composite Wave Fast Tripping: For standard composite wave residual current, the breaking time is less than 0.04s (0.15s for S-type), realizing ultra-fast fault cut-off.
Application Scenarios
Benefiting from high-frequency resistance, full-type current detection and high safety performance, CJL1-125-HP series Rccb Circuit Breaker is specially tailored for modern new energy and frequency conversion equipment, widely used in professional scenarios that ordinary Mcb Rccb combinations cannot adapt to:
- Residential Heat Pump Systems: The core matching protection device for household air source and ground source heat pumps, solving high-frequency and DC leakage protection problems of inverter heat pumps.
- Commercial HVAC Equipment: Suitable for central air conditioning, frequency conversion HVAC systems in shopping malls, hotels and office buildings to ensure safe and stable operation of frequency conversion equipment.
- New Energy Supporting Scenarios: Adaptable to low-voltage distribution protection of photovoltaic matching equipment, small inverter power supplies and other new energy devices.
- Industrial Frequency Conversion Equipment: Used for leakage protection of industrial frequency converters, variable speed motors and rectifier equipment to avoid equipment damage and electric shock risks caused by complex current faults.
Product Advantages
Compared with ordinary conventional Rcd Rcbo Rccb products on the market, C&J Electrical CJL1-125-HP Type B HP special RCCB has prominent professional advantages in new energy and heat pump protection fields:
- Full-Current Fault Detection: It uniquely supports smooth DC, pulsating DC and high-frequency AC residual current detection, realizing no blind spot protection for heat pump inverter equipment.
- Ultra-High Frequency Adaptation: Stable operation above 20kHz frequency, solving the problems of false tripping and protection failure of ordinary RCCBs in heat pump high-frequency scenarios.
- Strict Standard Certification: Dual compliance with IEC international standards and BS 7671 British specifications, fully meeting the safety and compliance requirements of high-standard electrical engineering.
- High Safety & Durability: High flame retardant and impact resistant shell, 10kA high short-circuit resistance, 4000 times mechanical and electrical life, stable long-term operation.
- Humanized Structural Design: Comfortable operating handle, transparent display window and fault middle position prompt, convenient for daily operation and maintenance.
- Customization Support: Provide professional OEM/ODM brand customization services with complete product specifications, adapting to diverse engineering and market demands.
Contact Us
CJL1-125-HP series Type B HP professional Rccb launched by C&J Electrical is a high-end protective device tailored for modern heat pumps and high-frequency frequency conversion equipment. It makes up for the functional defects of ordinary Mcb Rccb products, and provides compliant, accurate and stable leakage safety protection for new energy electrical systems.
If you have any questions about product selection, parameter matching, engineering installation and standard adaptation, or need customized OEM/ODM services, please feel free to contact us. C&J Electrical will provide you with professional technical support and full-cycle after-sales service.
Post time: Jun-03-2026