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China CBRM5E Ultra Compact Intelligent Circuit Breaker (MCCB) - High Quality Suppliers & Factory for Smart Grids

The D&T CBRM5E ultra-compact smart MCCB is designed for optimal performance and reliability in modern power distribution systems. This advanced circuit breaker features fast auto-reclosing within just 2 seconds, ensuring minimal downtime for your operations. With comprehensive protection functions, it includes fault recording, real-time temperature detection, and precision metering capabilities, supporting a rated current of up to 630A, As a leading China-based factory and supplier, we prioritize cutting-edge technology and innovative solutions. Our MCCB is equipped with multi-communication protocols and remote control features, making it an ideal choice for smart grid construction. Additionally, it functions as an externally controlled breaker for smart meters, incorporating islanding safety measures and power generation monitoring to facilitate secure photovoltaic grid connections, Our commitment to quality is reflected in our state-of-the-art SMT production capabilities, ensuring rigorous quality control and outstanding product stability. Choose D&T for reliable and efficient circuit protection solutions tailored for your needs
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    Product Details

    Main Functions and Product Meaning

    Product model and meaning

    Core Features

    ✓Adopt high-performance 32-bit ARM microprocessor for real-time signal processing.
    ✓LCD display in Chinese/English with user-friendly interface.
    ✓Automatic reclosing function with high speed (≤ 2s).
    ✓Three-section protection: Long delay, short delay, and instantaneous electronic tripping.
    ✓Comprehensive Protection: Overvoltage, undervoltage, open phase, and null line loss.
    ✓Communication: HPLC pluggable module and micro-power Bluetooth wireless.
    ✓Accuracy: Current and voltage up to Class 0.5s; Active power up to Class 1.
    ✓Protocols: Support DL/T645 and Modbus protocol with automatic identification.

    Operating Environment

    • Altitude: Not exceeding 2,000m.
    • Ambient temperature: -5℃ to +40℃ (Daily mean ≤ +35℃).
    • Relative humidity: ≤ 50% at +40℃.
    • Site conditions: Free of conductive dust, corrosive gases, and explosive hazards.
    • Ventilation: Good heat dissipation conditions required.

    Classification and Functions

    Functional Classification Conventional Type Metering Type Photovoltaic Type
    Protection Overload / Short Circuit ● ● ●
    Over/Under Voltage ● ● ●
    Islanding Protection ○ ○ ●
    Overtemperature △ △ ●
    Power Quality Monitoring ○ △ ●
    Measurement Voltage/Current ● ● ●
    Active/Reactive Power ○ ● ●
    Imbalance Monitoring ○ ● ●

    * ● Available | △ Optional | ○ Not Available

    Main Technical Parameters

    Specification and Model 125 250 400 630
    Rated Current of Frame Size (A) 125 250 400 630
    Rated Operating Voltage Ue AC 400V / 50Hz
    Rated Insulation Voltage Ui 1000V
    Impulse Withstand Voltage Uimp 8000V
    Breaking Capacity Icu (kA) 25/36/50 36/35/50 35/65/70 50/65/70
    Automatic Closing Time ≤ 2s

    Protection Characteristics

    Overload Long Delay Protection

    The setting range (Ir) is 0.4~1In or OFF. It follows the IEC standard inverse time limit curve.

    Protection Curve
    Action Time Chart

    Voltage & Temperature Protection

    Function Setting Range Default Value Action Time
    Overvoltage 231V ~ 330V 275V 2s
    Undervoltage 88V ~ 209V 145V 2s
    Overtemperature 80℃ ~ 160℃ 90℃ (Alarm) 60s / 0.2s

    Control & Installation

    Communication & External Control

    Communication Wiring

    The product supports Cost Control for energy meters and External Dynamic Protection via passive dry nodes (S1).

    Installation Dimensions (3P/4P)

    3P Dimensions
    4P Dimensions

    Frequently Asked Questions

    What is the automatic reclosing time of the circuit breaker?
    The circuit breaker features a high-speed automatic reclosing function with a closing time of ≤ 2 seconds.
    What communication protocols does this device support?
    It supports DL/T645 and Modbus protocols with automatic identification, and offers HPLC and Bluetooth wireless communication modules.
    Can the protection parameters be modified online?
    Yes, protection functions and parameters such as overvoltage, undervoltage, and phase loss can be set and modified online via the user interface or remote control.
    What are the environmental requirements for installation?
    The site should be below 2,000m altitude, within a temperature range of -5℃ to +40℃, and free from conductive dust or corrosive/explosive gases.
    Does it provide islanding protection for photovoltaic systems?
    Yes, the Photovoltaic type includes passive islanding protection which monitors voltage amplitude, frequency, and phase position to detect islanding states.
    What is the accuracy class for electrical measurements?
    Current and voltage accuracy can reach Class 0.5s, while active and reactive power measurement accuracy reaches Class 1.

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