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China CBRM5EKd Adjustable Circuit Breaker with LCD Display - Reliable MCCB from Top Suppliers and Factory

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D&T CBRM5KD MCCB is a highly reliable electrical component originating from China, designed with an ultra-compact size and exceptional breaking capacity. This product meets the stringent IEC 60947-2 standards and is certified by DEKRA, ensuring superior safety and performance.

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Featuring a dual-cover design, the MCCB guarantees live-part isolation, allowing for safe and straightforward accessory installation.

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Our factory employs advanced technology, including automatic screw fastening, precision laser marking, and fully automated testing systems. Each unit undergoes a rigorous 100% automated testing process, which evaluates trip force, overtravel, contact gap, loop resistance, final contact pressure, power-frequency withstand voltage, and tripping characteristics. This ensures that our products, made by reliable suppliers, deliver consistent and dependable operation for all your electrical needs.

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    Product Details

    Product Model & Description

    Product Model & Description

    Four-Pole Product Codes

    • Type A: The N pole is not equipped with an overcurrent release and remains permanently connected; it does not open or close together with the other three poles.
    • Type B: The N pole is not equipped with an overcurrent release but opens and closes together with the other three poles (N pole closes first and opens last).

    Operating Environment

    Normal Operating Conditions

    • The upper limit of ambient air temperature shall not exceed +40°C, the lower limit shall not be lower than -5°C, and the average temperature within 24 hours shall not exceed +35°C. (Note: When the ambient air temperature exceeds +40°C or falls below -5°C, the use of the circuit breaker should be subject to agreement with the manufacturer).
    • Installation altitude shall not exceed 2000 m.
    • The relative humidity of the atmosphere shall not exceed 50% at the maximum ambient temperature of +40°C. Higher relative humidity is allowed at lower temperatures (e.g., 90% at 20°C), with consideration given to condensation that may occur due to temperature changes on the product surface.

    Normal Installation Conditions

    • Installation category: Category Ⅲ for the main circuit, Category Ⅱ for the control and auxiliary circuits.
    • Installation orientation: Generally installed vertically (upright), but horizontal (flat-mounted) installation is also permissible.
    • Pollution degree: Degree 3.
    • External magnetic field: The external magnetic field in the installation location shall not exceed 5 times the geomagnetic field in any direction.

    Trip Unit Types & Accessory Codes

    Trip Unit Types & Accessory Codes
    Trip Unit Types & Accessory Codes Details

    Main Technical Parameters

    Model CBRM5Kd-125i CBRM5Kd-160 CBRM5Kd-250 CBRM5Kd-400 / CBRM5Kd-630i CBRM5Kd-800
    Frame Size Current Inm(A) 125 160 250 400, 630 800
    Rated Current In(A) 16, 20, 25, 30, 32, 40, 50, 63, 70, 75, 80, 90, 100, 125 16, 20, 25, 30, 32, 40, 50, 63, 70, 75, 80, 90, 100, 125, 140, 150, 160 100, 125, 140, 150, 160, 175, 180, 200, 225, 250 225, 250, 280, 300, 315, 350, 400, 500, 550, 630 630, 700, 800
    Number of Poles 3 4 3 4 3 4 3 4 3 4
    Rated Insulation Voltage Ui(V) 1000
    Rated Operation Voltage Ue(V) AC380, AC400, AC415 AC380, AC400, AC415, AC660, AC690
    Rated Impulse Withstand Voltage Uimp(kV) 8 12
    Arc Distance(mm) 50 100
    Breaking Capacity Level L M H L M H L M H L M H L M H
    Ultimate Short-Circuit Breaking Capacity Icu(kA) AC380V/AC400V/AC415V 10 18 25 25 36 50 36 50 70 50 70 100 50 70 100
    Service Short-Circuit Breaking Capacity Ics(kA) AC380V/AC400V/AC415V 10 18 25 25 36 50 36 50 70 50 70 100 50 70 100
    Ultimate Short-Circuit Breaking Capacity Icu(kA) AC660V/AC690V - - - 8 10 10 10 10 10 10 15 20 15 20 20
    Service Short-Circuit Breaking Capacity Ics(kA) AC660V/AC690V - - - 4 5 5 5 5 5 10 15 15 13 15 15
    Operating Performance (operations) Energized 1500 1500 1000 1000 500
    De-energized 8500 8500 7000 4000 2500
    Total 10000 10000 8000 5000 3000

    Protection Characteristics

    For Distribution Applications

    Rated Current (A) Thermal Trip Unit (Ambient Temp +40°C) Magnetic Trip Unit Operating Current (A)
    1.05In (Cold State) Non-Tripping Time (h) 1.3In (Hot State) Tripping Time (h)
    10 ≤ In ≤ 63 No Tripping Within 1 hour ≤ 1 10In ± 20%
    160 Frame, 16-32A: 400A ± 20%
    63 No Tripping Within 2 hours ≤ 2

    For Motor Protection

    Rated Current (A) Thermal Trip Unit (Ambient Temp +40°C) Magnetic Trip Unit Operating Current (A)
    1.0In (Cold State) Non-Tripping Time (h) 1.2In (Hot State) Tripping Time (h) 1.5In (Hot State) Tripping Time (h) 7.2In (Cold State) Tripping Time (h) Trip Level
    10 ≤ In ≤ 25 No Tripping Within 2 hours ≤ 2 ≤ 2 min 0.5s 5 12In ± 20%
    160 Frame, 16-32A: 400A ± 20%
    25 ≤ 4 min 4s 10
    250 ≤ 8 min 6s 20

    Circuit Breaker Classification

    • By Number of Poles: Three-Pole, Four-Pole.
    • By Application: For Distribution, For Motor Protection.
    • By Operating Method: Direct Handle Operation, Electric Operation (indicated by "p"), Rotary Handle Operation for Switchgear (indicated by "Z").

    Frequently Asked Questions

    What is the difference between Type A and Type B Four-Pole circuit breakers?
    Type A has an N pole that is not equipped with an overcurrent release, remains permanently connected, and does not open or close together with the other three poles. Type B also lacks an overcurrent release on the N pole but opens and closes together with the other three poles (closing first and opening last).
    What are the ambient temperature limits for normal operation?
    The ambient air temperature must not exceed +40°C, and the lower limit must not be lower than -5°C. Additionally, the average temperature over a 24-hour period should not exceed +35°C. For operation outside these limits, user agreement with the manufacturer is required.
    What is the maximum installation altitude for these circuit breakers?
    The standard installation altitude for the circuit breakers should not exceed 2000 meters.
    What are the relative humidity requirements for installation?
    At the maximum temperature of +40°C, the relative humidity must not exceed 50%. Higher humidity levels are permitted at lower temperatures (e.g., 90% at 20°C), provided consideration is given to condensation on the product surface caused by temperature shifts.
    What options are available for operating the circuit breakers?
    They can be operated using a Direct Handle, via Electric Operation (indicated by "p"), or using a Rotary Handle Operation designed for switchgear (indicated by "Z").
    What is the rated insulation voltage (Ui) of the CBRM5Kd series?
    The rated insulation voltage (Ui) for the CBRM5Kd series circuit breakers is 1000V.

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