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CBRM5EKd Electronic Adjustable Circuit Breaker With LCD Display (MCCB)

D&T CBRM5KD MCCB features an ultra-compact size and high breaking capacity, complying with IEC 60947-2 standards and holding DEKRA certification for verified safety and performance.

Its dual-cover design ensures live-part isolation, enabling safe and easy accessory installation.

Our production line is equipped with automatic screw fastening, precision laser marking and fully automated testing systems. Every unit undergoes 100% automated testing on trip force, overtravel, contact gap, loop resistance, final contact pressure, power-frequency withstand voltage and tripping characteristics, ensuring consistent and reliable operation.

    Product Model&Description

    model explan.png

    Four-Pole Product Codes

    Type A: N pole without overcurrent release element, and the N pole remains closed at all times and does not open or close with the other three poles.

    Type B: N pole without overcurrent release element, and the N pole opens and closes with the other three poles (the N pole closes first and opens later).

    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

    ScreenShot_2026-07-29_111122_922.pngScreenShot_2026-07-29_111304_650.png

    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)

    10、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

    36

    25

    36

    50

    36

    50

    70

    50

    70

    100

    50

    70

    100

    Service Short-Circuit Breaking Capacity Ics(kA)AC380VAC400V/AC415V

    10

    18

    36

    25

    36

    50

    36

    50

    70

    50

    70

    100

    50

    70

    100

    Ultimate Short-Circuit Breaking Capacity Icu(kA)AC660W/AC690V

    -

    -

    -

    8

    10

    10

    10

    10

    10

    10

    15

    20

    15

    20

    25

    Service Short-Circuit Breaking Capacity Ics(kA)AC660V/AC690V

    -

    -

    -

    8

    10

    10

    10

    10

    10

    10

    15

    20

    13

    15

    20

    Number of operating cycles

    With current

    4000

    4000

    4000

    1000

    500

    Without current

    10000

    10000

    10000

    4000

    2500

    Total

    14000

    14000

    14000

    5000

    3000

    Protection Characteristics

    For Distribution Applications

    Rated Current (A)

    Thermal Trip Unit (Ambient Temp +40)

    Magnetic Trip Unit Operating Current (A)

    1.05ln(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)

    Magnetic Trip Unit Operating Current (A)

    1.0In(Cold State)Non-Tripping Time (h)

    1.2ln(Hot State) Tripping Time (h)

    1.5ln(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" )

    Circuit Breaker Accessories(Dual-Cover Type)

    Rated Control Power Supply Voltage Us (V)

    AC230V、AC400V;DC24V

    Rated Operating Voltage (V)

    (0.7-1.1)Us

    Shunt Release

     4.Shunt Release.2.jpg

    Note: K The micros witch inside the shunt release,connected in series with the coil, is normally closed After the breaker trips,the contact opens automatically;it closes when the breaker is switched on, The dashed box indicates the internal accessory wiring diagram of the circuit breaker.

     4.Shunt Release.1.jpg

    Rated Control Power Supply Voltage Us (V)

    AC230V、AC400V

    Operating Voltage (V)

    The circuit breaker reliably trips when the voltage is 35%-70% of the rated operational voltage.The breaker closes reliably when the voltage is 85%- 110% of the rated operational voltage.
    Closing is prevented when the voltage is below 35%.

    Under voltage Release

     4.Under voltage Release.2.jpg

    Note: P1, P2, UC2, and UC1 are terminal designations.

     4.Under voltage Release.1.jpg

    Conventional Thermal Current Ith(A)

    3A

    Rated Operating Current Ie(A)

    0.26A when In≤250A; 0.3A when In≥400A

    Auxiliary Contact

     4.Auxiliary Contact.2.jpg

     4.Auxiliary Contact.1.jpg

    Conventional Thermal Current Ith(A)

    3A

    Rated Operating Current Ie(A)

    0.26A when In≤250A;0.3A when In ≥ 400A

    Alarm Contact

     4.Alarm Contact.2.jpg

     4.Alarm Contact.1.jpg

    Conventional Thermal Current Ith(A)

    3A

    Rated Operating Current Ie(A)

    0.26A when In≤250A;0.3A when In ≥ 400A

    Auxiliary Contact, Alarm Contact

     4.Auxiliary Contact, Alarm Contact.2.jpg

     4.Auxiliary Contact, Alarm Contact.3.jpg

     4.Auxiliary Contact, Alarm Contact.1.jpg

    Wiring Diagram

    Input Voltage (V)

    AC230V、AC400V;DC110V、DC230V、DC24V

    Motor Operator Mechanism

     4.Motor Operator Mechanism.2.jpg

    Description:                                  

    P1-P2: External power supply inputSB1,SB2: Operating buttons (provided by the user)Note: The dashed box indicates the internal wiring diagram of the circuit breaker accessories.

     4.Motor Operator Mechanism.1.jpg

    Overall Dimensions and Mounting Dimensions of the Motor Operator Mechanism

    4.Overall Dimensions and Mounting Dimensions of the Motor Operator Mechanism.jpg

    Model

    Overall Dimensions(mm)

    Mounting Dimensions (mm)

    L1

    B

    H

    H1

    a

    b

    125i

    102

    73

    92

    14

    25

    117

    160

    116

    90

    97

    16

    30

    129

    250

    116

    90

    95

    16

    35

    126

    400、630i

    176

    130

    151

    34.5

    44

    194

    800

    176

    130

    146

    31

    70

    243

    Overall Dimensions and Mounting Dimensions of Rear-Connected Circuit Breaker (125i)

    4.Overall Dimensions and Mounting Dimensions of Rear-Connected Circuit Breaker ( 125i.jpg

    Overall Dimensions and Mounting Dimensions of Rear-Connected Circuit Breaker ( 160-800 )

    4.Overall Dimensions and Mounting Dimensions of Rear-Connected Circuit Breaker ( 160-800 ).jpg

    Model

    Overall Dimensions(mm)

    Mounting Dimensions (mm)

    L2

    H1

    H2

    A1

    A2

    b2

    D

    d

    160

    132

    42

    75

    60

    90

    132

    Φ24

    Φ8.5

    250

    144

    39

    73

    70

    105

    144

    Φ24

    Φ8.5

    400、630i

    226

    34

    69

    87

    130.5

    226

    Φ32

    Φ12.5

    800

    243

    62

    84

    140

    210

    234

    Φ48

    Φ14

    Overall Dimensions and Mounting Dimensions of Plug-in Rear-Connected Circuit Breaker

    4.Overall Dimensions and Mounting Dimensions of Plug-in Rear-Connected Circuit Breaker.jpg

    Model

    A

    B1

    B2

    C1

    C2

    E

    F

    G

    K

    H

    H1

    H2

    N

    S

    Q

    B3

    B4

    AM

    BM

    4-d

    125i

    145

    75

    100

    50

    75

    60

    121

    92

    27

    27

    16

    15

    142

    87

    26

    80

    110

    M5

    M5

    Φ6.5

    160

    169

    91

    125

    60

    90

    56

    132

    92

    38

    50

    33

    28

    179

    83

    48

    101

    135

    M6

    M8

    Φ6.5

    250

    186

    107

    145

    70

    105

    54

    145

    94

    46

    50

    33

    37

    196

    84

    56

    117

    155

    M6

    M8

    Φ6.5

    400、630i

    280

    144

    188

    88

    132

    145

    224

    180

    50

    60

    38

    46

    290

    170

    60

    154

    198

    M8

    M12

    Φ8.5

    800

    300

    210

    280

    90

    160

    142

    243

    174

    63

    87

    61

    21

    315

    170

    73

    220

    290

    M10

    M14

    Φ10

    Overall Dimensions and Mounting Dimensions of Plug-in Front-Connected Circuit Breaker

    4.Overall Dimensions and Mounting Dimensions of Plug-in Front-Connected Circuit Breaker.jpg

    Model

    Overall Dimensions(mm)

    A

    B

    E

    F

    G(3P)

    H

    L(3P)

    L1

    L2

    M

    N

    K

    d

    A1(3P)

    B1

    D

    125i

    91

    48

    121

    55

    50

    150

    78

    25

    25

    193

    176

    23

    Φ6

    25

    112

    Φ3.5

    4.Overall Dimensions and Mounting Dimensions of Plug-in Front-Connected Circuit Breaker.2.jpg

    Model

    Overall Dimensions(mm)

    A

    B

    C

    D

    E

    F

    H

    H1

    K1

    K2

    d1

    d2

    A1

    A2

    A3

    A4

    A5

    A6

    A7

    160

    172

    96

    216

    50

    61

    66

    15

    35

    38

    38

    Φ6.5

    M8

    18

    3

    19

    10.5

    30

    10.5

    196

    250

    183

    110

    261

    51.5

    64

    70

    42.5

    35

    44

    44

    Φ6.5

    M8

    49

    3

    22

    13.5

    35

    22

    227

    400、630i

    282

    144

    362

    362

    146

    88

    20

    59

    50

    50

    Φ8.5

    Φ11

    26

    6

    30

    14.5

    44

    25

    331

    800

    305

    210

    409

    409

    144

    90

    16

    61

    62

    62

    Φ11

    Φ13

    24

    8

    35

    35

    70

    36

    377

    Overall Dimensions and Mounting Dimensions of Rotary Handle Operating Mechanism

    4.Overall Dimensions and Mounting Dimensions of Rotary Handle Operating Mechanism.jpg

    Model

    125i

    160

    250

    400、630i

    800

    Mounting Dimensions H(mm)

    54

    60

    60

    97

    90

    A

    25

    30

    35

    44

    70

    B

    95

    120

    142

    195

    243

    Note: The standard rod length provided at delivery is 150mm.

    Dimensions of the Circuit Breaker with Protective Cover

    4.Note The standard rod length provided at delivery is 150mm.Dimensions of the Circuit Breaker with Protective Cover.jpg

    Model

    125i

    160

    250L、M

    250H

    400

    630i

    800

    Number of Poles

    3P

    3P

    3P

    3P

    3P

    3P

    3P

    L4

    170

    195

    208

    208

    292

    505

    436

    W3

    78

    92.5

    107

    107

    140

    186.5

    234

    H5

    67.5

    67.5

    74

    100

    101.5

    101.5

    111

    Overall Dimensions &Mounting Dimensions(Dual-Cover Type)

    5.Overall Dimensions &Mounting Dimensions(Dual-Cover Type).jpg

    Model

    Overall Dimensions(mm)

    Mounting Dimensions (mm)

    L

    L1

    L2

    L3

    W1

    W2

    H

    H1

    H2

    H3

    H4

    W

    B

    d

    A

    CBRM5Kd-125iL、M、H

    135

    86

    49

    24.5

    78

    103

    63.5

    21

    69.5

    95

    21

    25

    117

    Φ4.2

    25

    CBRM5Kd-160L、M、H

    150

    95

    51

    29

    92.5

    122.5

    65.5

    25.5

    75

    100

    23

    30

    130

    Φ4.5

    30

    CBRM5Kd-250L、M

    165

    102

    56.5

    31

    107

    142

    72

    21.5

    79

    105

    21.5

    35

    126

    Φ5

    35

    CBRM5Kd-250H

    165

    102

    56.5

    31

    107

    142

    97

    21.5

    105

    132

    21.5

    35

    126

    Φ5

    35

    CBRM5Kd-400L、M、H

    257

    150

    87.5

    58

    140

    184

    99

    35

    108

    163

    37

    44

    194

    Φ7

    44

    CBRM5Kd-630iL、M、H

    257

    150

    87.5

    58

    140

    184

    99

    36.5

    108

    163

    38.5

    44

    194

    Φ7

    44

    CBRM5Kd-800L、M、H

    280

    180

    86.9

    64

    210

    280

    109

    38

    117

    170

    41.5

    70

    243

    Φ7.5

    70

    Operation &Maintenance

    ◆Before installation, carefully review the relevant dimensional drawings and mounting instructions, and verify that the nameplate technical specifications meet the requirements.

    ◆For circuit breakers with a motor operator mechanism, do not remove the motor operator during installation, as it may affect tripping characteristics, After tripping, the motor operator automatically resets the breaker. Closing requires a closing command from the upper- level controller, tripping similarly requires a tripping command. For manual closing opening, set the motor operator switch to "Manual" . If the breaker is in the free trip position, it must be manually reset before performing closing or opening operations.

    ◆Internal and external accessories of the circuit breaker are preset at the factory. Users should not attempt to adjust or disassemble them.Installation can be done directly.

    ◆The phase line must be properly connected. Otherwise, internal electronic circuits may not function properly.affecting the protection capability.

    ◆For breakers equipped with an under voltage release, the release must be supplied with its rated operating voltage before closing is possible.

     

    Transportation& Storage

    Transportation

    Protect against harmful liquids (such as water, rain, snow, chemical solvents, corrosive liquids, etc.) and avoid mixing with incompatible items; prevent strong impact and compression. Stack according to the packaging orientation instructions; the number of layers must comply with the label on the outer carton.

     

    Storage

    ◆Ambient Temperature:-10℃to +45℃.

    ◆Relative Humidity: 90% (at +20℃ambient temperature).

    ◆The storage location shall be free of dust and conductive particles.

    ◆No corrosive, flammable, or explosive gases; protected from rain and snow.

    ◆It shall be dry and well ventilated.

    ◆Stack according to packaging orientation; the number of layers must not exceed the limit indicated on the outer carton.

     

    Precautions

    ◆The company is not responsible for warranty claims if terminal damage is caused by improper installation, improper use(non-quality issues),or incorrect wiring.

    ◆If any issues arise during product use, please contact your local distributor or the company's customer service center.

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