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Ultra-Compact CBRM5 MCCB - High Breaking Capacity from China Suppliers and Factory, IEC 60947-2 Certified

Introducing the D&T CBRM5 MCCB, an ultra-compact circuit breaker designed for exceptional performance and safety. Manufactured in China, our circuit breaker complies with IEC 60947-2 standards and holds DEKRA certification, ensuring the highest quality assurance for our customers, At our factory, we utilize advanced technology including automatic screw fastening, precision laser marking, and fully automated testing systems. Each unit of the D&T CBRM5 MCCB undergoes rigorous 100% automated testing for vital parameters such as trip force, overtravel, contact gap, loop resistance, final contact pressure, power-frequency withstand voltage, and tripping characteristics. This comprehensive testing process guarantees consistent and reliable operation, making us a trusted supplier in the industry. Choose D&T for innovative solutions and unmatched reliability in circuit protection
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    Product Details

    Product Model & Description

    CBRM5-1.jpg

    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

    3.Trip Unit Types & Accessory Codes.jpg3.Trip Unit Types & Accessory Codes.2.jpg

    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 < In ≤ 800 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 ≤ 2min 0.5s < Tp ≤ 5s 5 12In ± 20%
    160 Frame, 16-32A: 400A ± 20%
    25 < In ≤ 250 ≤ 4min 4s < Tp ≤ 10s 10
    250 < In ≤ 800 ≤ 8min 6s < Tp ≤ 20s 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 are the ambient temperature limits for operating this circuit breaker?

    The ambient air temperature must not exceed +40°C, and the lower limit must not fall below -5°C. The average temperature over a 24-hour period should not exceed +35°C.

    What is the maximum installation altitude allowed?

    The installation altitude for these circuit breakers must not exceed 2000 meters.

    What options are available for the number of poles?

    The circuit breakers are classified and available in both Three-Pole and Four-Pole configurations.

    What operating methods can be used with these circuit breakers?

    They support three operating methods: Direct Handle Operation, Electric Operation (indicated by "p"), and Rotary Handle Operation for Switchgear (indicated by "Z").

    What are the main application classifications for the circuit breakers?

    They are classified by application into two types: For Distribution and For Motor Protection.

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