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- ADJUSTABLE THERMAL & FIXED MAGNETIC TYPE
- HSN Code : 85362020
- Three Pole MCCB
An adjustable molded case circuit breaker (MCCB) is a circuit breaker with a trip unit that allows you to change its current and/or time settings to suit the specific needs of a load. This provides greater flexibility and precision than a fixed-type MCCB, which has non-adjustable settings. Adjustable MCCBs are used in industrial and commercial applications for protecting equipment with high and variable current draws, such as large motors, generators, and distribution systems.
Adjustable MCCBs are categorized by their trip unit technology, which determines how the trip settings can be modified.
- Mechanism: These MCCBs use both a thermal element (a bimetallic strip) for overload protection and a magnetic element (an electromagnet) for short-circuit protection.
- Adjustability: In a fully adjustable thermal-magnetic MCCB, you can set both the thermal (overload) trip level and the magnetic (short-circuit) trip level.
- Partial adjustability: Some thermal-magnetic MCCBs may offer an adjustable thermal setting for overload protection but have a fixed magnetic setting for short-circuit protection.
- Mechanism: An electronic trip unit uses current transformers and solid-state circuitry to monitor the current. A microprocessor can be integrated to provide an even higher level of accuracy and control.
- Adjustability: These MCCBs offer the most precise and flexible adjustments, with controls for multiple parameters. These may include:
- 𝐼𝑅
(Long-time pick-up): The current level for overload protection.
- 𝑡𝑅
(Long-time delay): The time delay for the overload trip.
- 𝐼𝑠𝑑
(Short-time pick-up): The current level for short-circuit protection with a delay.
- 𝑡𝑠𝑑
(Short-time delay): The time delay for the short-circuit trip.
- 𝐼𝑖
(Instantaneous pick-up): The current level for instantaneous short-circuit protection.
- Benefits: Electronic MCCBs provide better coordination with other protective devices in a system and may store trip history for diagnostics.
𝐼𝑅- Customization: Trip settings can be fine-tuned to match the specific needs of the connected equipment, allowing for optimal protection.
- Versatility: A single MCCB can be reconfigured for different applications or changing system requirements, which reduces the need for multiple fixed-type breakers.
- Selective coordination: By adjusting the time-delay settings, an electronic adjustable MCCB can be configured to trip only the breaker nearest to the fault, minimizing disruptions to the rest of the system.
- Reduced downtime: Since the trip unit can be adjusted rather than replaced, it simplifies maintenance and can reduce downtime. The "molded case" refers to the rigid, insulated housing that encases the breaker's internal components.
An MCCB functions using a thermal-magnetic trip mechanism.
Thermal tripping: Protects against overloads. A bimetallic strip inside the breaker heats and bends as current increases. If the overload continues, the strip will bend enough to trip the circuit and break the current.- Magnetic tripping: Protects against short circuits. A strong electromagnetic field is generated by a current surge, which activates a tripping plunger to instantly interrupt the circuit.
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Our Location :
Westside Controls 7.B.Murli Vihar Behind Canara Bank Sarojini Nagar Lucknow 226008
Factory Westside Controls
Khasra no-174, Amausi Station Road Naderganj Industrial Area Lucknow226008
Direct Line Numbers
9776806777 , 0522-3642558
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