Molded Case Circuit Breakers (MCCBs) play a crucial role in electrical distribution systems by offering crucial protection against overload and short circuits.
These essential components are typically integrated into the main power distribution board (MPDB) of a facility, ensuring reliable protection, control, coordination, isolation, and system shutdown during emergencies. By tripping automatically when a fault or overcurrent situation arises, MCCBs safeguard the system, circuit, and any connected electrical loads from damage.
Understanding Voltage Classifications
MCCBs are designed for use in electrical systems operating at voltages below 1000V.
Voltage levels are generally categorized as follows:
- Low Voltage – less than 1kV (though some classifications set this at 600V).
- Medium Voltage – from 1kV up to 40kV.
- High Voltage – from 40kV onwards.
NOARK produces high-quality switchgears that meet both global and North American standards across these voltage categories, as well as for extra-high voltage (EHV) and ultra-high voltage (UHV) systems.
Applications for Molded Case Circuit Breakers
MCCBs are versatile devices utilized to manage overcurrent protection in a wide range of electrical systems. They serve various sectors, including industrial, manufacturing, building and infrastructure, residential applications, and critical and standby power systems.
Common applications of MCCBs cover electrical protection for:
- Electric Motors
- Generators
- Electric Feeders, and more
High-Quality MCCB Products in North America
In ensuring the safety and efficiency of electrical distribution equipment, sourcing reliable MCCB products is integral. NOARK is dedicated to surpassing industry regulations by providing businesses in North America with leading-edge products.
Their offerings include:
- Ex9 Series M1 to M5 – Ranges from 15A to 800A, suitable for AC/DC applications.
- Ex9 Series M6 – Ranges from 800A to 1200A, designed for AC applications.
- Ex9M1PV – Ranges from 15A to 100A, tailored for DC applications.
These products represent a broad but not exhaustive selection of offerings from NOARK.
Features of NOARK’s MCCBs
NOARK's Molded Case Circuit Breakers are equipped with advanced features to deliver superior performance and customer satisfaction.
Features include:
- High-breaking capacity and patented arc extinguishing design.
- Bearing-type spindle to reduce the operating force required for opening and closing mechanisms.
- Compact, modular design ensuring high quality.
- Fixed and adjustable trip unit settings.
- Standardized line and load lugs installation.
- 5-Year limited warranty.
It is a requirement in electrical distribution systems to have Molded Case Circuit Breakers (MCCB), as they provide both overload protection as well as short-circuit protection.
The main power distribution board (MPDB) of a facility is usually equipped with MCCBs, which allow for protection, coordination, associated control, isolation, and shutdown of the entire system in the case of an emergency.
Molded case circuit breakers (MCCBs)
In the case of molded case circuit breakers (MCCBs), these safety devices are used to protect the conductors of electrical circuits, feeder circuits, downstream electrical equipment, or loads against overloads and short circuits.
In order to mitigate damage to an electrical system, this device automatically trips off and isolate itself from the power supply when there is a fault or overcurrent situation, thus preventing damage to the system, circuit, or electrical load connected to it.
Classification for Voltage levels
MCCBs are used in electrical systems of less than 1000V.
The general classification for Voltage levels are:
- Low voltage – less than 1kV (some classification use 600V).
- Medium Voltage – 1kV up to 40kV.
- High voltage – from 40kV.
NOARK manufactures high-quality switchgears with Global and North American certifications in the listed voltage categories as well as extra high Voltage (EHV) and UHV (ultra high voltage) systems.
Molded Case Circuit Breaker (MCCB) Applications
MCCBs can be used in a variety of applications to manage electrical systems’ overcurrent protection. These applications are found in electrical systems used across many segments including industries, manufacturing, building & infrastructure, residential application, critical & standby power, and many more.
The following are some examples of electrical loads/systems that use the Molded Case Circuit Breaker for protection:
- Electric Motors
- Generators
- Electric Feeders, and more
Best MCCB products Available in North America
It is important to source the products from reliable sources, especially when dealing with the safety and management of expensive electrical distribution equipment and machinery.
That’s why NOARK has committed to ensuring that it meets and exceeds industry regulations to provide North American businesses with industry pioneering products. NOARK offers a variety of MCCB products to cover all of the needs, including:
- Ex9 Series M1 to M5 (15A to 800A)
Available for AC/DC application;
- Ex9 Series M6 (800A to 1200A)
Available for AC application; and
Available for DC application.
The above products are by no means an exhaustive list of the offerings.
NOARK’s MCCBs Features
To ensure customers are provided with the highest quality products, all NOARK Molded Case Circuit Breakers are provided with the following industry-pioneering features:
- High-breaking capacity and a patented arc extinguishing design.
- A bearing-type spindle reduces the operating force required to open and close the operating mechanism.
- High quality compact modular design
- Fixed and adjustable trip unit settings
- Line and load lugs installed standard; and
- 5-Year limited warranty
