最近搜索

    MCCBs

    Moulded Case Circuit Breakers (MCCBs) are protective devices used to interrupt and protect electrical circuits from overcurrent and short-circuits. MCCBs are electrical devices that can be used to protect a wide range of electrical systems and equipment.

    They are commonly used in low and medium-voltage applications and can handle higher levels of current than Miniature Circuit Breakers (MCBs). MCCBs typically have a rated current of 10 amps to 2,500 amps, and a breaking capacity of up to 200 kA.

    Types of Moulded Case Circuit Breakers

    Moulded case circuit breakers are available in various configurations to suit diverse electrical protection needs, often categorised by their current handling capabilities and specific functionalities.

    MCCB Switch vs. Standard Moulded Circuit Breakers

    While both have a similar moulded case breaker design, their functions differ. A standard moulded circuit breaker, for instance, automatically interrupts circuits during faults, providing overcurrent and short-circuit protection. An MCCB switch, however, mainly serves as a manual isolator without automatic tripping.

    Based on Current Rating: 100A MCCB, 400A MCCB

    The current rating of a moulded case circuit breaker is a critical factor. For lower current circuits, a 100A MCCB may be suitable. For higher demands, like industrial machinery, a 400A MCCB offers the necessary protection against overcurrents and short circuits.

    100A MCCB

    100A MCCBs are typically used in residential and light commercial settings to provide robust protection for circuits with moderate current demands. These moulded case circuit breakers offer reliable overcurrent and short-circuit protection for distribution boards, lighting circuits, and smaller machinery. Additionally, their key features often include adjustable trip settings, allowing for customisation based on the specific application. Their compact design also makes them suitable for installations where space may be limited, ensuring safety and preventing electrical faults within the specified current capacity.

    400A MCCB

    400A MCCBs are essential for industrial and high-load commercial environments, providing critical protection for substantial electrical systems and equipment. These moulded case circuit breakers are designed to handle significant current, offering features such as adjustable trip settings to fine-tune protection parameters. Also, their high breaking capacity ensures they can safely interrupt large fault currents, while their robust construction guarantees reliable performance in demanding applications like protecting large motors, transformers, and main distribution boards.

    Benefits of Using MCCBs

    Moulded case circuit breakers offer numerous advantages for electrical systems, ensuring both safety and operational efficiency.

    Reliable Overcurrent Protection

    MCCBs provide dependable protection against overcurrents and short circuits, safeguarding equipment and preventing potential electrical hazards. This automatic interruption capability is crucial for maintaining the integrity of electrical installations.

    High Durability and Robustness

    Designed for demanding applications, moulded case breakers boast high durability and a robust construction, ensuring a long operational lifespan and reliable performance even in challenging environments.

    Wide Application Range

    From residential and commercial buildings to industrial plants and data centres, MCCBs offer a versatile solution for protecting a broad spectrum of electrical systems and equipment, including motors and transformers.

    Adjustable Protection Settings

    Many MCCBs feature adjustable trip settings, allowing for customisation of the protection characteristics to match the specific requirements of the application, enhancing both safety and operational flexibility.

    Enhanced Safety and Compliance

    Utilising moulded case circuit breakers ensures compliance with safety standards, contributing to a safer electrical environment and providing peace of mind regarding the protection of personnel and equipment.

    Difference Between an MCB and an MCCB

    MCBs are miniature circuit breakers designed to protect low-current circuits up to 125 amps. They typically have a breaking capacity of up to 10 kA and are designed to trip quickly in the event of a short circuit or overload. MCBs are commonly used in residential and commercial buildings to protect individual circuits, such as lighting and power circuits.

    MCCBs, on the other hand, are designed to handle higher levels of current (depending on which current rating you buy) and can protect larger electrical systems and equipment. They also have a higher breaking capacity than MCBs.

    How MCCBs Work

    An MCCB consists of a current-carrying bimetallic strip, a magnetic trip element, and a mechanical latching mechanism. When the current flowing through the MCCB exceeds the set limit, the bimetallic strip heats up and bends, causing the latch to release and trip the breaker. The magnetic trip element senses the magnetic field produced by a high fault current and trips the breaker.

    Applications of MCCBs

    MCCBs are commonly used in a wide range of applications, including:

    • Industrial pPlants: MCCBs are used to protect motors, transformers, and other equipment in industrial plants.
    • Data Ccentres: MCCBs are used to protect power distribution systems in data centres.
    • Commercial Bbuildings: MCCBs are used to protect lighting and power circuits in commercial buildings.
    • Hospitals: MCCBs are used to protect critical equipment in hospitals, such as MRI machines and X-ray machines.

    How to Choose the Right MCCB

    Selecting the appropriate moulded case circuit breaker involves careful consideration of your specific electrical system requirements. Key factors to consider include:

    • Load Requirements: Accurately assess the current demands of the circuit to ensure the MCCB's current rating is suitable.
    • Trip Characteristics: Understand the required trip characteristics (e.g., thermal-magnetic) for effective protection against both overloads and short circuits.
    • Voltage Rating: Verify that the moulded case circuit breaker's voltage rating meets or exceeds the system's voltage.
    • Breaking Capacity: Determine the necessary breaking capacity—the maximum fault current the MCCB can safely interrupt—to ensure adequate protection against potential high-fault conditions.

    How to Order MCCBs from RS Australia

    Looking for a trusted source for moulded case circuit breakers? RS Hong Kong offers a wide selection of high-performance MCCBs from leading brands such as Siemens, Schneider Electric, and ABB.

    Whether you require thermal circuit breakers, distribution boards, circuit terminal blocks, or high-capacity MCCBs, RS Hong Kong makes the ordering process straightforward. You can easily purchase the moulded circuit breaker you need online through our website. Simply explore our extensive range of MCCBs and other circuit protection devices, complete your order, and have it delivered to your location. You can also pick up your order from a local branch.

    Alternatively, our dedicated team is available to assist you with your moulded case breaker requirements. You can place your order or discuss your needs by calling us directly at 852 2421 9898.

    How Delivery Works at RS Hong Kong

    At RS Hong Kong, we understand the importance of receiving your moulded case circuit breakers promptly. We offer efficient delivery services for our extensive range of MCCBs, including various current ratings and types of moulded circuit breakers. For detailed information on our delivery options, timelines, and any applicable charges, please review our dedicated Delivery page.

    10197 產品顯示為 MCCBs

    • RS庫存編號 831-9163
    • 製造零件編號 1SDA067414R1 XT1N 160 TMD 63-630 3p F F
    HK$2,390.10
    ABB
    Protecta
    XT1N
    3
    63A
    36 kA
    690V
    500V
    DIN Rail Mount
    76.2mm
    130mm
    70mm
    -
    -
    -
    Better World
    • RS庫存編號 236-6619
    • 製造零件編號 1SDA068155R1 XT4N 160 Ekip LSI 100A FF
    HK$14,616.20
    ABB
    XT4N
    1SDA06
    4
    100A
    -
    -
    -
    Fixed
    -
    -
    -
    Designed for disassembly
    Yes
    -
    • RS庫存編號 192-0839
    • 製造零件編號 1SDA067057R1
    HK$5,885.89
    ABB
    -
    -
    3
    100A
    65 kA
    690V
    -
    -
    90mm
    82.5mm
    130mm
    -
    -
    -
    Better World
    • RS庫存編號 232-0268
    • 製造零件編號 1SDA068069R1 XT3N 250 TMD 200A FF
    HK$7,727.50
    ABB
    SACE Tmax XT
    XT3N
    4
    200A
    -
    -
    -
    Fixed
    -
    -
    -
    Designed for disassembly
    Yes
    -
    Better World
    • RS庫存編號 254-6360
    • 製造零件編號 C25N3TM200
    HK$14,710.10
    Schneider Electric
    ComPacT NSX
    C25N
    3
    200A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    Better World
    • RS庫存編號 211-6037
    • 製造零件編號 3VA1180-4EE46-0AA0
    HK$4,527.20
    Siemens
    0AA0
    3VA11
    4
    80A
    36 kA
    690V
    500V
    Fixed
    -
    -
    -
    Extended product life, Saves energy
    Yes
    -
    Better World
    • RS庫存編號 219-8427
    • 製造零件編號 NLJF36600U31XTW
    HK$60,644.53
    Schneider Electric
    PowerPact
    NH
    3
    600A
    100 kA
    750V
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    • RS庫存編號 254-6269
    • 製造零件編號 C1032D100
    HK$3,979.40
    Schneider Electric
    ComPacT NSX
    C103
    3
    100A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    • RS庫存編號 260-8124
    • 製造零件編號 C40N32D250
    HK$31,969.37
    Schneider Electric
    ComPacT
    NSX
    3
    250A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    • RS庫存編號 237-5970
    • 製造零件編號 1SDA054477R1 T5N400 FF TMA 320A
    HK$13,837.98
    ABB
    T5N
    1SDA
    4
    320A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Better World
    • RS庫存編號 219-8426
    • 製造零件編號 NLJF36250U31XTW
    HK$46,629.57
    Schneider Electric
    PowerPact
    NH
    3
    250A
    100 kA
    750V
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    Better World
    • RS庫存編號 221-1029
    • 製造零件編號 LV432658
    HK$9,775.57
    Schneider Electric
    ComPact
    LV43
    4
    400A
    -
    -
    -
    -
    -
    -
    -
    -
    Yes
    Green Premium
    • RS庫存編號 231-9343
    • 製造零件編號 1SDA100459R1 XT5S630 TMA630-6300 4pFF N
    HK$21,116.10
    ABB
    SACE Tmax XT
    XT5S
    4
    630A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Better World
    • RS庫存編號 209-5075
    • 製造零件編號 3VA1220-4EF32-0AA0
    HK$6,746.20
    Siemens
    SENTRON
    3VA
    3
    200A
    36 kA
    690V
    500V
    Fixed
    158mm
    105mm
    70mm
    Extended product life, Saves energy
    Yes
    -
    • RS庫存編號 831-9175
    • 製造零件編號 1SDA067418R1 XT1N 160 TMD 160-1600 3p F F
    HK$3,024.30
    ABB
    Protecta
    XT1N
    3
    160A
    36 kA
    690V
    500V
    DIN Rail Mount
    76.2mm
    130mm
    70mm
    -
    -
    -
    • RS庫存編號 628-8048
    • 製造零件編號 259140 PN1-63
    毎盒:1 个
    HK$2,047.70
    Eaton
    -
    -
    3
    63A
    80 kA
    690V
    -
    Fixed
    90mm
    145mm
    84.5mm
    -
    -
    -
    • RS庫存編號 270-4807
    • 製造零件編號 3VA2563-5KQ32-0AA0
    HK$26,543.70
    Siemens
    SENTRON
    3VA2
    3
    630A
    25 kA
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Better World
    HK$5,818.50
    Schneider Electric
    PowerPact
    BD 100
    3
    100A
    14 kA
    525V
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    • RS庫存編號 260-7931
    • 製造零件編號 C25N3
    HK$10,385.81
    Schneider Electric
    ComPacT
    NSX
    3
    250A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Better World
    • RS庫存編號 236-7472
    • 製造零件編號 1SDA067742R1 XT2S 160 TMG 40A FF
    HK$3,460.53
    ABB
    XT2S
    1SDA06
    3
    40A
    -
    -
    -
    Fixed
    -
    -
    -
    Designed for disassembly
    Yes
    -
    每頁顯示的結果