Inquiry Now
Leave Your Message
Products Categories
Featured Products
CBRM5E Ultra Compact Intelligent Circuit Breaker (MCCB)

CBRM5E Ultra Compact Intelligent Circ...
CBRM5EKd Electronic Adjustable Circuit Breaker With LCD Display (MCCB)

CBRM5EKd Electronic Adjustable Circui...
CBRM5KdE Electronic Adjustable Circuit Breaker (MCCB)

CBRM5KdE Electronic Adjustable Circui...
CBRM5Kd Compact MCCB Molded Case Circuit Breaker (Dual Cover)

CBRM5Kd Compact MCCB Molded Case Circ...
CBRM5EL Compact Automatic Reclosing Circuit Breaker with Residual Current Protection(MCCB)

CBRM5EL Compact Automatic Reclosing C...
CBRM3EL Automatic Reclosing Circuit Breaker with Residual Current Protection(MCCB)

CBRM3EL Automatic Reclosing Circuit B...
CBRM3EL Automatic Reclosing Circuit Breaker with Residual Current Protection (Metering MCCB)

CBRM3EL Automatic Reclosing Circuit B...
CBRM5K Compact Lockable Molded Case Circuit Breaker (MCCB)

CBRM5K Compact Lockable Molded Case C...
CBRECB Motor Integrated Circuit Breaker For Smart Meter Remote Control (MCCB)

CBRECB Motor Integrated Circuit Break...
CBRM5ENCL Primary-secondary Seperated Circuit Breaker With Auto-reclosing and Residual Current Protection(MCCB)

CBRM5ENCL Primary-secondary Seperated...
0102030405
CBRM3EL Smart Metering Circuit Breaker 0.jpg
CBRM3EL Smart Metering Circuit Breaker 1.jpg
CBRM3EL Smart Metering Circuit Breaker 2.jpg

China CBRM3EL Automatic Reclosing Circuit Breaker Suppliers - Residual Current Protection MCCB Factory with Smart Monitoring

Introducing our advanced metering-type residual current protection circuit breaker, designed with cutting-edge 32-bit ARM processing technology. This reliable device offers adjustable online residual current protection, complete with reclosing functionality, ensuring your electrical systems remain safe and efficient. Our circuit breaker features three-stage electronic trip protection and comprehensive monitoring of electrical parameters to maintain optimal performance, Incorporating essential protection mechanisms such as over/under-voltage and phase loss protection, this breaker also boasts an intuitive LCD interface for easy operation. With DL/T645 and Modbus support, along with HPLC and Bluetooth communication capabilities, communication with other devices is seamless. Its four remote functions enhance functionality, making it a valuable addition for any electrical setup, Manufactured in China, our circuit breaker meets class 1.0 metering accuracy, making it a trusted choice among suppliers and factories across various industries. Additionally, it stores and displays trip events in a user-friendly manner, ensuring you stay informed about your electrical system's performance. Choose our metering-type residual current protection circuit breaker for unmatched quality and reliability
    Contact us
    Product Details

    CBRM3EL Residual Current Protection Circuit Breaker (Metering Type)
    Model and Meaning
    CBRM3EL Model and Meaning
    Main Functions and Features
    • Adopt high-performance 32-bit ARM microprocessor, real-time signal processing and intelligent control;
    • LCD display in Chinese/English, user-friendly interface, easy operation;
    • The residual current (leakage) protection can be adjusted online, and the residual current level has the function of reclosing;
    • Real-time monitoring and tracking of the residual current of the line, automatic adjustment of the range, to ensure the operation rate and reliability of the product;
    • Three-stage protection, long delay, short delay and instantaneous, using electronic trip, independent of power supply voltage;
    • It has high breaking capacity and ensures the reliability of line short circuit protection;
    • Over-voltage protection, under-voltage protection, phase loss protection, and zero loss protection, protection functions and parameters can be set and modified online;
    • Real-time display of line residual current, three phase power supply voltage, and load current; real-time measurement of active power, reactive power, apparent power, and power factor;
    • Trip types (residual current, lockout, overload, phase loss, zero-segment break, etc.) can be identified, displayed, stored, queried, and deleted;
    • Supports four remote functions: telemetry, telemetering, remote control, and remote adjustment; features HPLC plug-and-play modules and low-power Bluetooth wireless communication;
    • 0.05In-1.2In metering accuracy up to 1.0 class, real-time temperature monitoring of incoming line terminal blocks (optional).
    • Accumulate three-phase active power, optional time control and fee control modes for better application flexibility;
    • Supports DL/T645 and Modbus protocols with automatic recognition, enables online remote upgrades for easier maintenance;
    • Accuracy class: current and voltage accuracy up to 0.5s class, active and reactive power accuracy up to 1 class, residual current up to 2 class.
    Circuit Breaker Classification and Functions
    Functional classification Conventional type Quantitative Photovoltaic
    Defencive function Overload protection ● ● ●
    Short-circuit protection ● ● ●
    RCD protection ● ● ●
    Autoreclose circuit breaker ● ● ●
    Phase loss protection ○ ● ●
    Over-voltage crowbar ● ● ●
    Under-voltage protection ● ● ●
    Zero-loss protection ● ● ●
    Over/under frequency protection ● ○ ●
    Power-off protection ●   ●
    Phase Sequence Protection ● ● ●
    Island Protection ○ ○ ●
    Over-temperature Protection ○ △ ●
    Power generation quality monitoring and protection ○ △ ●
    Measurements Line residual current ● ● ●
    Three-phase working voltage ● ● ●
    Four-phase working current ● ● ●
    Active power ○ ● ●
    Reactive power ○ ● ●
    Apparent output ○ ● ●
    Voltage imbalance ○ ● ●
    Unbalanced current ○ ● ●
    Performance Settings Rated residual operating current ● ● ●
    Long delay due to overload ● ● ●
    Short circuit delay ● ● ●
    Instantaneous short circuit ● ● ●
    Over-voltage protection value ● ● ●
    Under-voltage protection value ● ● ●
    Time and date ● ● ●
    Protect investment and exit ● ● ●
    Phase loss protection value ● ○ ●
    Over/under frequency protection value ○ ● ●
    Voltage imbalance protection value ○ ● ●
    Unbalanced current protection value ○ ● ●
    Information storage, query, and display Remain current action ● ● ●
    Miscellaneous exercises ● ● ●
    Communication RS-485/DL-T-20 ● ● ●
    Signal carrier ○ △ △
    PDA ○ △ △
    ● Indicates the feature is available, △ indicates the feature is optional, ○ indicates the feature is not available
    Measurement Accuracy Class
    Accuracy Tolerance
    Current accuracy ±0.5%、±1.0%
    Voltage accuracy ±0.5%、±1.0%
    Active power accuracy ±1.0%、±1.5%、2.0%、2.5%
    Reactive power accuracy ±1.0%、±1.5%、2.0%、2.5%
    RMS current accuracy ±1.0%、±2.0%
    Key Technical Specifications
    Specifications and models 125 250 400, 630 630 800
    Rated current of the shell frame class (A) 125 250 400, 630 630 800
    Number of poles 3P+N
    Rated working voltage Ue (V) AC 400/50HZ
    Rated insulation voltage Ui (V) 1000
    Rated impulse withstand voltage Uimp (V) 8000
    Flash-over distance (mm) ≠50 ≠100
    Maximum short-circuit breaking capacity (Icu, kA) 5070 (H-type) 6585 (Type H) 6585 (Type H) 6585 (Type H)
    Operating short-circuit breaking capacity (Ics, kA) 350 (H-type) 4255 (H-type) 5065 (H-type) 4255 (Type H)
    Rated residual short-circuit breaking capacity IΔn (kA) 12.517.5 (H-type) 16.2521.25 (H-type)
    RCD trip characteristics AC mould
    Rated residual operating current IΔn (mA) 30/50/75/100/200/300/500/600/800 Auto 30/50/100/200/300/400/500/600/800/1000/Auto
    Rated short-time current Icw (kA)/s 3 400: 5
    630: 8    		 8 10
    Remaining motion time characteristics Delayed/non-delayed
    Delay-type limit non-drive time (s) 0.06/0.1/0.2 Optional: 2IΔn
    Break-time (s) IΔn≤0.5; 2IΔn≤0.2; 5IΔn≤0.15
    Automatic reclosing time (s) 20-60
    Operation performance (times) Set up an electric circuit 1000 1000 500
    No power 7000 4000 2500
    Total 8000 5000 3000
    Overload and short-circuit characteristics Three-stage protection with electronic adjustment. See "Protection Characteristics" for details.
    Over-voltage protection value (V) Set the value (231~330) with the default value of 275V
    Under-voltage protection value (V) Set the value (88~209). The default value is 145V.
    Hour loss protection value (V) Set value (10~130) / default value 30V
    Control delay time (ms) ≤40ms
    Communication delay (ms) ≤200ms
    Protection Feature Description
    ◆ Overload and long delay protection
    Action value range
    Table 1: Overload long delay parameter settings
    Parameter Shroud current Set value Factory set value
    Action Set-point Ir1 125 40A, 50A, 63A, 80A, 100A, 125A 125A
    250 63A, 80A, 100A, 125A, 140A, 160A, 180A, 200A, 225A, 250A 250A
    400, 630 160A, 180A, 200A, 225A, 250A, 315A, 350A, 400A, 450A, 500A, 560A, 630A 400A / 630A
    630 250A, 300A, 315A, 350A, 400A, 500A, 560A, 630A 630A
    800 315A, 350A, 400A, 450A, 500A, 560A, 630A, 700A, 800A 800A
    Delay time setting value tL 3s, 4s, 6s, 8s, 10s, 12s, 16s, 18s, OFF 3s
    ◆ Performance characteristic
    Table 2: Protection action characteristics
    Ambient temperature Current name Set current multiplier Appointed time
    +40℃ Conventional non tripping current 1.05Ir1 ≥2h
    Conventional tripping current 1.3Ir1 <2h
    ◆ Time-delay characteristics
    The overload protection is based on the inverse time characteristic:
    The delay time T is calculated as (6Ir1/I)² * tL, with a tolerance of ±10%. Here, T represents the action time, Ir1 is the long delay protection setting, I denotes the fault current, and tL is the long delay time setting.
    ◆ Short circuit short delay protection
    Short delay protection prevents impedance short circuit in the power distribution system, and the trip delay is to achieve selective protection.
    Short-circuit short delay protection parameter settings
    Table 3: Short-circuit delay parameter setting
    Ambient temperature Current name Set current multiplier Appointed time
    +40℃ Conventional non tripping current 1.05Ir1 ≥2h
    Conventional tripping current 1.3Ir1 <2h
    Short-circuit short delay protection action characteristics
    Table 4: Short delay action characteristics of short circuit
    Characteristic Fault current multiple Trip characteristics Delay error
    No action feature ≤0.85 Ir2 Failure to actuate /
    Performance characteristic >1.15 Ir2 Deferred action ±40ms
    ◆ Instant Protection
    Set parameters for instantaneous short-circuit protection
    Table 5: Instantaneous parameter setting
    Parameter setting Set value Factory set value
    Instantaneous action current setting Ir3 4 Ir1, 6 Ir1, 7 Ir1, 8 Ir1, 9 Ir1, 10 Ir1, 11 Ir1, 12 Ir1, 13 Ir1, 14 Ir1, OFF 10 Ir1
    Short-circuit instantaneous protection action characteristics
    Table 6: Instantaneous motion characteristics
    Characteristic Current multiplier (I/Ir3) Trip characteristics Trip time
    No action feature <0.85 Failure to actuate ≥200ms
    Performance characteristic >1.15 Movement <200ms
    ◆ Setting range for residual current protection characteristics
    Table 7
    Parameter Set value (125, 250) Set value (400, 630, 800)
    Remaining motion current IΔn 30, 50, 75, 100, 200, 300, 500, 600, 800 automatic 30, 50, 100, 200, 300, 400, 500, 600, 800, 1000 automatic
    ◆ Performance characteristic
    Table 8: Protection Action Characteristics
    Parameter Characteristic
    Rated no-load current 0.5 IΔn
    Rated operating current ≥0.8 IΔn
    Time-delay characteristics 2IΔn Limit Time (Δt) Break-time
    IΔn 2IΔn 5IΔn
    Non-delay   ≤0.3s ≤0.15s ≤0.04s
    0.06 ≥0.06s ≤0.5s ≤0.2s ≤0.15s
    0.1 ≥0.10s ≤0.8s ≤0.3s ≤0.3s
    0.2 ≥0.20s ≤1.0s ≤0.4s ≤0.4s
    ◆ Auto mode
    In automatic gear mode, the gear values and floating values are:
    Gauge reading (mA) Floating value (mA)
    30 15
    50 25
    75 37.5
    100 50
    200 100
    300 150
    400 200
    500 250
    600 300
    800 400
    1000 -
    When the residual current exceeds the floating threshold of a setting without reaching its activation level and remains stable for 60 seconds, the setting is raised by one level. This process continues until reaching the maximum setting. Conversely, when the residual current falls below the floating threshold of the next lower setting and remains stable for 120 seconds, the setting is lowered by one level. This sequence repeats until reaching the minimum setting. Taking the 'Automatic 2" setting with an initial residual current of 100mA as an example: When the circuit breaker is energized, the setting automatically resets to 300mA. If the residual current increases to over 150mA and remains stable for 60 seconds, the setting changes to 500mA. When the residual current decreases below 150mA and stays stable for 120 seconds, the setting adjusts to 200mA.
    ◆ Autoreclose circuit breaker
    When residual current exceeds the set trip current threshold, the circuit breaker will trip. After 20-60 seconds, it can automatically reclose, though manual reclosing is unrestricted. If the fault current disappears within 5 seconds after reclosing, the operation is successful and the breaker resumes normal operation. If the fault persists, the breaker will trip again and remain locked, preventing automatic reclosing. In such cases, manual reclosing must be performed.
    ◆ Over-voltage protection
    When the line phase voltage exceeds the over-voltage protection setting, the circuit breaker trips. Once the voltage returns to normal, the circuit breaker automatically recloses and resumes operation. The over-voltage protection range is 231V to 330V, with a factory default of 275V. Users can adjust or disable the protection as needed.
    ◆ Under-voltage protection
    The circuit breaker trips when the phase voltage falls below the under-voltage protection setting. Once the voltage returns to normal, the breaker automatically recloses. The under-voltage protection range is 88V to 209V, with a factory default of 145V. Users can adjust or disable the protection as needed.
    ◆ Phase loss protection
    When a phase is missing at the power supply end of the line, the circuit breaker protection trips. After the line recovers to normal voltage, it can be automatically closed and put into operation. The setting range of phase loss protection is 10V~130V, and the factory setting is 30V. Users can set or disable the protection themselves.
    ◆ Linked Protection
    The linkage interface can be used to coordinate with other firefighting equipment for protection as follows:
    DI input settings Function declaration Priority Delay time
    Input control Short the public port to the closed port Trip the circuit breaker LOW ≤40ms
    Short the public port to the switch port Trip the circuit breaker Gao ≤40ms
    Note: Prolonged short-circuiting will keep the circuit breaker in the open state.
    ◆ Cost control protection
    This product can be connected to a fee-controlled meter as an external circuit breaker, compatible with both pulse-type and level-type fee-controlled meters. To activate this feature, the switch must be configured in fee-controlled mode and the interlock permission must be enabled. When operating in fee-controlled mode, the interlock protection function automatically deactivates. Manual or automatic closing cannot be performed without a fee-controlled signal from the meter. Forced closing will trigger an automatic disconnection.
    ◆ Time control protection
    This product is designed for scenarios requiring timed operation, such as smart street lighting systems and campus energy management solutions. When operating in time-controlled mode, users can configure start and end times for circuit closure. The device supports four preset time windows. During these periods, it automatically closes the circuit if no faults are detected. In case of safety issues (e.g., over-voltage, under-voltage, or leakage current), the system activates protective measures and reopens automatically after conditions improve. Outside these windows, the device automatically locks out. For emergency power supply during such periods, users must switch to normal operation mode before closing the circuit. Failure to do so will trigger automatic disconnection.
    Characteristic Curve
    CBRM3EL Characteristic Curve
    Outline Overall and Installing Dimensions
    Outline Overall and Installing Dimensions 3Outline Overall and Installing Dimensions 4Outline Overall and Installing Dimensions 5Outline Overall and Installing Dimensions 1Outline Overall and Installing Dimensions 2
    Reclosing plug-in type shape and installation dimensions
    Reclosing plug-in type shape and installation dimensions
    Installation dimensions
    Applicable circuit breakers External mounting dimensions (mm)
    A B2 C2 E F G K H H1 H2 H3 N S Q B4 AM BM 4-d
    CRM3EL-250 257 145 107 129 216 167 45 45 34 35.5 12 267 157 55 155 M6 M8 Ф6
    CRM3EL-400 358 197 110 209 303 248 55 60.5 40.5 43.5 22.5 369 236 65 207 M8 M12 Ф8
    CRM3EL-630 300 242 158 123 234 170 65 60 39 50 32 310 160 75 252 M8 M12 Ф8.5
    CRM3EL-630 (Capacity Upgrade)V 358 197 110 209 303 248 55 60.5 40.5 43.5 22.5 369 236 65 207 M8 M12 Ф8
    CRM3EL-800 305 280 162 146 243 181 62 87 60 22 / 315 171 72 290 M10 M14(T) Ф11
    Frequently Asked Questions (FAQ)

    What are the primary functions of the CBRM3EL Residual Current Circuit Breaker?

    The CBRM3EL provides comprehensive circuit protection including overload, short-circuit, residual current (leakage), over-voltage, under-voltage, phase loss, and zero-loss protection. It also features real-time metering of active/reactive power, voltage, current, and power factor.

    Does the circuit breaker support automatic reclosing?

    Yes, the device features automatic reclosing. If a residual current fault triggers a trip, the breaker automatically attempts to reclose after 20-60 seconds. If the fault persists, it trips again and remains locked for safety until manually reset.

    What communication protocols and wireless features are supported?

    It supports DL/T645 and Modbus protocols with automatic recognition. For wireless connectivity, it includes low-power Bluetooth and HPLC plug-and-play modules, enabling remote telemetry, control, adjustment, and online upgrades.

    How accurate is the built-in metering system?

    The CBRM3EL offers high-precision measurement: current and voltage accuracy up to class 0.5s, active and reactive power accuracy up to class 1, and residual current accuracy up to class 2.

    What are the time control and fee control modes?

    The time control mode allows scheduling up to four preset time windows for operations like street lighting. The fee control mode integrates with external prepaid utility meters to automatically disconnect or connect power based on fee signals.

    Leave Your Message