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Molded Case Circuit Breakers (MCCB)
An MCCB, or Molded Case Circuit Breaker, is an electrical safety device that automatically disconnects electrical power when it identifies an overload, short circuit, or ground fault. Its purpose is to safeguard an electrical circuit from harm due to excessive current caused by an overload or short circuit.
part#
description
manufacturer
GHB3030
Eaton Series C complete molded case circuit breaker, G-frame, GHB, Complete breaker, Fixed thermal, Fixed magnetic trip type, Three-pole, 30 A, 480Y/277 Vac, 125/250 Vdc, 50/60 Hz
Eaton
STOCK: 34
Fast shippingLV432876
Schneider Electric LV432876 is a Moulded Case Circuit Breaker (MCCB) within the NSX630F sub-range, designed for lug connection and featuring 3 poles. It offers protection functions including L (Long-time protection), S0 (Short-time protection with fixed time delay), and I (Instantaneous protection). The rated current is 630A, with a rated insulation voltage (Ui) of 800 V. Protection settings are adjustable for L (Long-time protection) from 0.4 to 1 x In and S0 (Short-time protection with fixed time delay) from 1.5 to 10 x Ir, while I (Instantaneous protection) is fixed at 6900A. The rated impulse voltage (Uimp) stands at 8 kV, with a trip current rating of 630 AT and a frame current rating of 630 AF. Mechanical durability is rated at 15,000 operations at no load, and electrical durability at 8,000 operations (440Vac; In/2) and 4,000 operations (440Vac; In) with load. The rated voltage (AC) phase-to-phase is 690 V, with all 3 poles protected. It features a Micrologic 2.3 (LI) interchangeable electronic trip unit and falls under utilisation category A.
Schneider Electric
STOCK: 15
Fast shippingNV100-CVFU3P100A30
Moulded case circuit breaker, earth leakage, 3P, 100 Amps, 30mA leakage current.
Mitsubishi Electric
STOCK: 10
Fast shippingFD3080
Eaton Series C complete molded case circuit breaker, F-frame, FD, Complete breaker, Fixed thermal, Fixed magnetic trip type, Three-pole, 80 A, 600 Vac, 250 Vdc, Load side, 50/60 Hz
Eaton
STOCK: 10
Fast shippingLV432676
Schneider Electric LV432676 is a Moulded Case Circuit Breaker (MCCB) within the NSX400F sub-range, designed for lug connection and featuring 3 poles. It offers protection functions including L (Long-time protection), S0 (Short-time protection with fixed time delay), and I (Instantaneous protection). The rated current is 400A, with a rated insulation voltage (Ui) of 800V. Protection settings are adjustable for L (Long-time protection) from 0.4 to 1 x In and S0 (Short-time protection with fixed time delay) from 1.5 to 10 x Ir, while I (Instantaneous protection) is fixed at 4800A. The rated impulse voltage (Uimp) stands at 8 kV, with a trip current rating of 400 AT and a frame current rating of 400 AF. Mechanical durability is rated at 15,000 operations at no load, and electrical durability at 12,000 operations (440Vac; In/2) and 6,000 operations (440Vac; In) with load. The rated voltage (AC) phase-to-phase is 690 V, with all 3 poles protected. It features a Micrologic 2.3 (LI) interchangeable electronic trip unit and falls under utilisation category A.
Schneider Electric
STOCK: 9
Fast shippingLV431630
Schneider Electric LV431630 is a Moulded Case Circuit Breaker (MCCB) within the NSX250F sub-range. This 3-pole MCCB features lug connection type and offers thermal protection (overload) and magnetic protection (short-circuit). It has a rated current of 250A, with a rated insulation voltage (Ui) of 800 V. The protection settings are adjustable, with over-current adjustable from 0.7 - 1.0 x In and short-circuit pickup current adjustable from 5-10xIn. The rated impulse voltage (Uimp) is 8 kV, and it has a trip current rating of 250 AT with a frame current rating of 250 AF. The mechanical durability is rated at 20,000 operations at no load, and electrical durability is rated at 20,000 operations at 440Vac with half the rated current (In/2) and 10,000 operations at 440Vac with the rated current (In). The rated voltage (AC) phase-to-phase is 690 V, with all three poles protected. The trip unit type is a TMD Interchangeable Thermal-Magnetic (adjustable), and it falls under utilisation category A.
Schneider Electric
STOCK: 4
Fast shippingHFD2150
Eaton Series C complete molded case circuit breaker, F-frame, HFD, Complete breaker, Fixed thermal, Fixed magnetic trip type, Two-pole, 150 A, 600 Vac, 250 Vdc, 100 kAIC at 240 Vac, 65 kAIC at 480 Vac, Load side, 50/60 Hz
Eaton
STOCK: 4
Fast shippingLV429036
Schneider Electric LV429036 is a trip unit designed for thermal and magnetic protection. It belongs to the TMD sub-range and functions as a trip unit alone. This part is suitable for systems requiring 3 poles and offers thermal protection against overload and magnetic protection against short-circuits. It has a rated current of 25A, with over-current protection settings adjustable from 0.7 to 1.0 times the rated current (In) and a fixed short-circuit pickup current of 300A. The trip current rating is 25 AT, and it protects all 3 poles. The LV429036 features an interchangeable thermal-magnetic (adjustable) trip unit type, ensuring targeted protection for electrical circuits.
Schneider Electric
STOCK: 3
Fast shippingLV429091
Schneider Electric LV429091 is a trip unit designed for use in electrical circuit protection. It belongs to the Micrologic 5.2A (LSI) sub-range and is characterized by its 3 Pole configuration. This unit is equipped with L (Long-time), S0 (Short-time with fixed time delay), and I (Instantaneous) protection functions. It has a rated current of 40A and offers adjustable protection settings including long-time protection adjustable from 0.4 to 1 x In, short-time protection with an adjustable time delay from 1.5 to 15 x Ir and a time delay range from 0.1 to 0.4s, and instantaneous protection adjustable from 1.5 to 15 x In. The trip current rating is 40 AT, and it protects 3 poles. The LV429091 is an interchangeable electronic trip unit type and features measurement functions for I1, I2, I3, IN, Imax, Iground, and percentage unbalance.
Schneider Electric
STOCK: 3
Fast shippingLV432106
Schneider Electric LV432106 is a trip unit designed for use in electrical circuit protection. It belongs to the Micrologic 6.3A (LSIG) sub-range and is characterized by its 4-pole configuration. This trip unit is equipped with multiple protection functions including Long-time (L), Short-time with fixed time delay (S0), Instantaneous (I), and Ground fault (G) protection. It has a rated current of 400A and offers adjustable protection settings: Long-time protection adjustable from 0.4 to 1 x In, Short-time protection with adjustable time delay from 1.5 to 15 x Ir and a time delay range from 0.1 to 0.4s, Instantaneous protection adjustable from 1.5 to 12 x In, and Ground fault protection adjustable from 0.2 to 1 x In with a time delay of 0.1 to 0.4s. The trip current rating is 400 AT, and it protects all 4 poles. This interchangeable electronic trip unit also features measurement functions for current (I1, I2, I3, IN, Imax) and ground imbalance (% unbalance%).
Schneider Electric
STOCK: 2
Fast shippingLV429100
Schneider Electric LV429100 is a trip unit designed for use in electrical circuit protection. It belongs to the Micrologic 5.2A (LSI) sub-range and functions solely as a trip unit. This model is equipped with four poles and offers three main protection functions: L (Long-time protection), S0 (Short-time protection with fixed time delay), and I (Instantaneous protection). The rated current for this unit is 100A. Protection settings include long-time protection adjustable from 0.4 to 1 times the rated current, short-time protection with an adjustable time delay ranging from 1.5 to 15 times the rated current and a time delay from 0.1 to 0.4 seconds, and instantaneous protection adjustable from 1.5 to 15 times the rated current. The trip current rating stands at 100 AT, and it protects all four poles. The LV429100 features an interchangeable electronic Micrologic 5.2A (LSI) trip unit type and includes measurement functions for I1, I2, I3, IN, Imax, Iground, and percentage of unbalance.
Schneider Electric
STOCK: 2
Fast shippingLV429111
Schneider Electric LV429111 is a trip unit designed for use in electrical circuit protection. It belongs to the Micrologic 6.2A (LSIG) sub-range and functions solely as a trip unit. This model is equipped with three poles and offers a variety of protection functions including Long-time protection (L), Short-time protection with fixed time delay (S0), Instantaneous protection (I), and Ground fault protection (G). The rated current for this unit is 40A. Its protection settings are adjustable, with Long-time protection ranging from 0.4 to 1 times the rated current (In), Short-time protection offering an adjustable time delay from 1.5 to 15 times the Ir with a delay range of 0.1 to 0.4 seconds, Instantaneous protection adjustable from 1.5 to 15 times the rated current, and Ground fault protection adjustable from 0.4 to 1 times the rated current with a time delay of 0.1 to 0.4 seconds. The trip current rating stands at 40 AT, and it protects all three poles. The LV429111 features an interchangeable electronic trip unit type, Micrologic 6.2A (LSIG), and includes measurement functions for I1, I2, I3, IN, Imax, Iground, and percentage unbalance.
Schneider Electric
STOCK: 2
Fast shippingLV429003
Schneider Electric LV429003 is a frame designed for use within the NSX100F range, characterized by its function as a circuit breaker frame without a trip unit. It features a lug connection type and is built for 3 poles. The rated current for this part is 100A, with a rated insulation voltage (Ui) of 800V and a rated impulse voltage (Uimp) of 8kV. The frame's current rating stands at 100 AF. It boasts a mechanical durability of 50,000 operations at no load and an electrical durability of 50,000 operations at 440Vac with half the rated current (In/2), and 30,000 operations at 440Vac with the rated current (In). The rated voltage (AC) phase-to-phase is 690V, and it protects 3 poles. The trip unit type is interchangeable, and it falls under utilisation category A.
Schneider Electric
STOCK: 2
Fast shippingT5N300TWARHU8
Circuit Breaker T5N 300A 3P T/M UL AUX RH UV
ABB Control
STOCK: 2
Fast shippingLV430410
Schneider Electric LV430410 is a frame designed for use within the NSX160L sub-range, functioning as a circuit breaker frame without a trip unit. It features a lug connection type and supports 4 poles. The rated current for this part is 160A, with a rated insulation voltage (Ui) of 800V and a rated impulse voltage (Uimp) of 8kV. The frame's current rating stands at 160 AF. It boasts a mechanical durability of 40,000 operations at no load and an electrical durability of 40,000 operations at 440Vac with half the rated current (In/2), and 20,000 operations at 440Vac with the rated current (In). The rated voltage (AC) phase-to-phase is 690V, and all four poles are protected. The trip unit type is interchangeable, and it falls under utilisation category A.
Schneider Electric
STOCK: 2
Fast shippingLV430490
Schneider Electric LV430490 is a trip unit designed for use in electrical circuit protection. It belongs to the Micrologic 5.2A (LSI) sub-range and functions solely as a trip unit. This model is equipped with three poles and offers protection functions including Long-time protection (L), Short-time protection with fixed time delay (S0), and Instantaneous protection (I). The rated current for this unit is 160A. Its protection settings are adjustable, with Long-time protection (L) ranging from 0.4 to 1 times the rated current (In), Short-time protection (S) with an adjustable time delay ranging from 1.5 to 15 times the rated current (Ir) and a time delay from 0.1 to 0.4 seconds, and Instantaneous protection (I) adjustable from 1.5 to 15 times the rated current (In). The trip current rating stands at 160 AT, and it protects all three poles. The LV430490 features an interchangeable electronic Micrologic 5.2A (LSI) trip unit type and includes measurement functions for current (I1, I2, I3, IN, Imax) and ground unbalance percentage.
Schneider Electric
STOCK: 2
Fast shippingLV429213
Schneider Electric LV429213 is an earth leakage module belonging to the Vigi MH sub-range, designed to provide earth leakage protection. This module operates with a fixed residual current sensitivity of 300mA (0.3A) and is suitable for systems with a rated voltage (AC) phase-to-phase of 440V. It features a 4-pole configuration, ensuring that all poles are protected. The rated insulation voltage (Ui) for this device is 800V, and it can withstand rated impulse voltages (Uimp) up to 8kV, highlighting its capability to handle significant voltage spikes.
Schneider Electric
STOCK: 2
Fast shippingLV431500
Schneider Electric LV431500 is a trip unit categorized under the Trip unit (MA) sub-range, designed to function solely as a trip unit. It is a 3-pole device equipped with magnetic protection to safeguard against short-circuits. The rated current for this unit is 220A, and it features protection settings for short-circuit pickup current that are adjustable from 9 to 14 times the nominal current (In). The trip current rating stands at 220 AT, and all three poles are protected. This MA interchangeable magnetic-only trip unit is specifically engineered to offer magnetic protection.
Schneider Electric
STOCK: 2
Fast shippingLV432094
Schneider Electric LV432094 is a trip unit designed for use in electrical protection systems. It belongs to the Micrologic 5.3A (LSI) sub-range and is characterized by its 4-pole configuration. This unit is equipped with long-time (L), short-time with fixed time delay (S0), and instantaneous (I) protection functions. The rated current for this device is 400A, with protection settings including long-time protection adjustable from 0.4 to 1 times the rated current (In), short-time protection with an adjustable time delay from 1.5 to 12 times the rated current (Ir) and a time delay range from 0.1 to 0.4 seconds, and instantaneous protection adjustable from 1.5 to 12 times the rated current (In). The trip current rating stands at 400 AT, and it protects all 4 poles. The LV432094 features an interchangeable electronic trip unit type, Micrologic 5.3A (LSI), and offers measurement functions for current (I1, I2, I3, IN, Imax) and ground unbalance percentage.
Schneider Electric
STOCK: 2
Fast shippingLV430403
Schneider Electric LV430403 is a frame designed for use within the NSX160F range, functioning as a circuit breaker frame without a trip unit. It features a lug connection type and is built for 3 poles. The frame is rated for a current of 160A, with an insulation voltage rating of 800V and an impulse voltage rating of 8kV. The frame's current rating stands at 160 AF. It boasts a mechanical durability of 40,000 operations at no load and an electrical durability of 40,000 operations at 440Vac with half the rated current, and 20,000 operations at 440Vac with the rated current. The rated voltage for phase-to-phase connections is 690V, and it is designed to protect 3 poles. The trip unit type is interchangeable, and it falls under utilisation category A.
Schneider Electric
STOCK: 2
Fast shipping
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Molded Case Circuit Breakers (MCCB)
General Guide & Overview
Understanding the dynamics of electrical safety necessitates a thorough knowledge of molded case circuit breakers, commonly known as MCCBs. They play a crucial role in the protection against electrical hazards, including fires and shocks. But, what is a molded case circuit breaker? This protective device is meticulously crafted to interrupt current flow in the event of excessive loads, ensuring the sanctity of the electrical systems it safeguards. The significance of MCCBs can't be understated, considering they follow stringent guidelines set by the National Electrical Code® (NEC®) and align with the requirements of UL 489 standards.
Diving into what is an MCCB reveals a versatile range of products. From ground fault to arc-fault circuit interrupters and from devices catered to photovoltaic systems to robust surge-protective devices, the MCCB's adaptability is as extensive as its utility. But how does a molded case circuit breaker work? Whether utilizing classic thermal magnetic trip mechanisms or sporting advanced electronic units, MCCBs are engineered to detect and respond to thermal overloads, short circuits, and ground faults with precision. Their distinct features, prescribed by UL standards, ensure that these indispensable components fulfill their protective role in diverse applications with efficacy and reliability.
Understanding Molded Case Circuit Breakers (MCCB)
Exploring the intricate realm of electrical safety, it's essential to address a common inquiry: what is the difference between MCB and MCCB circuit breakers? Minature Circuit Breakers (MCBs) are suitable for domestic applications, offering protection to individual circuits. In contrast, Molded Case Circuit Breakers (MCCBs) serve a more robust purpose in industrial environments. This distinction is pivotal in electrical engineering, impacting how we safeguard our systems from overloads and faults.
The function of an MCCB within electrical frameworks is profound. Its core responsibility lies in integrating a temperature-sensitive element with an electromagnetic component. Together, these create a robust defense mechanism against excessive current flows. Such integration is precisely executed to promptly interrupt the circuit when potential dangers like thermal overloads, short circuits, and ground faults emerge.
Evaluating MCCB vs MCB, one can recognize the vast capabilities of MCCBs to handle higher power systems and a broader range of current ratings. The MCCB's construction is a matrix of precision-engineered mechanisms designed to detect abnormal currents. A bimetallic strip within the breaker warms up under excessive current flow, bending to instigate a trip action - a fundamental aspect of what is the MCCB function.
Imagine a scenario where high currents surge through a system due to an insulation failure. Here, the MCCB's electromagnet responds instantaneously, actuating a trip and consequently mitigating the risk of damage. The difference between MCB and MCCB becomes apparent in their response to these events, emphasizing the latter's suitability for comprehensive protection in more demanding electrical infrastructures.
The evolution of MCCBs embraces the incorporation of ground fault protection directly into the trip unit, highlighting their advanced capabilities. Embracing such advancements ensures that MCCBs remain at the forefront of circuit protection technology. Fully grasping the mccb in electrical systems means recognizing its essential role in maintaining the integrity and safety of today's complex power networks.
Molded Case Circuit Breakers (MCCB) in Electrical Systems
The protection and management of electrical systems are pivotal, and when dissecting the intricacies of these systems, one frequently encounters the comparison of mcb vs mccb. The distinction between the two is substantial, with MCCBs bearing a design for higher capacity and adaptability, a clear choice for comprehensive system protection. A crucial feature, the mccb function, resides in its ability to safeguard against various fault conditions while supporting multiple applications, from residential complexes to grand scale industrial layouts. In essence, understanding what is molded case circuit breaker invites recognition of a device formed to interrupt excessive currents swiftly, thereby preserving the integrity of the electrical circuit it serves.
At the core of their operation, MCCBs are engineered to be resilient. They exhibit a multitude of trip characteristics suitable for unique environments and load profiles. Whether it be a surge within a domestic dwelling or an industrious leap in an assembly line, the MCCB interrupts these irregular currents promptly to avert probable mishaps. This dynamic performance, teamed with their adaptability, underscores the importance of mccb application in diverse electrical systems, affirming their role as indispensable components in modern power management and safety frameworks.
Advancements in technology have ensured that MCCBs are not left behind. Their proficiency now extends to safeguarding systems integrative of renewable energies, such as photovoltaic setups, and those reliant on novel power storage solutions. Given their inherent modular structure, these circuit breakers provide flexibility and reliability, reflecting their readiness to evolve in step with electrical advancements. The divergent milieu of electrical environments finds a common sentinel in MCCBs, echoing their universal presence and paramount significance in electrical safety.
FAQ
What is a Molded Case Circuit Breaker (MCCB)?
An MCCB is a type of electrical protection device that can automatically cut off electrical power when it detects an overload, short circuit, or ground fault. It's designed to protect an electrical circuit from damage caused by excess current resulting from an overload or a short circuit.
How does a Molded Case Circuit Breaker work?
An MCCB functions by combining thermal and magnetic trip elements. The thermal component, usually a bimetal strip, responds to prolonged overload conditions by bending and triggering the trip mechanism, while the magnetic element activates almost instantly in severe short-circuit conditions to protect the circuitry.
What is the difference between MCB and MCCB?
The key difference lies in their capacity and applications. MCBs, or Miniature Circuit Breakers, are designed for lower power applications and typically offer lower interrupting current ratings. MCCBs, on the other hand, are suitable for higher power applications and can handle higher current ratings, making them ideal for industrial or commercial installations.
What does MCCB stand for?
MCCB stands for Molded Case Circuit Breaker, which refers to the type of casing that encapsulates the internal components, providing a robust barrier against mechanical and environmental factors.
What is the function of an MCCB?
The primary function of an MCCB is to provide protection by interrupting the flow of electricity in the event of an overload or a fault condition, such as a short circuit or a ground fault. It safeguards electrical circuits by preventing damage to equipment and reducing the risk of electrical fires or shocks.
What are the applications of MCCBs in electrical systems?
MCCBs are versatile and are used in a variety of electrical systems ranging from residential to industrial settings. They are essential in environments where high-rated currents are used and are ideal for circuit protection in power distribution networks, such as transformer protection, backup protection, and capacitor bank protection.