FAQ about MCCBs

What does MCCB protect against?

Molded case circuit breakers (MCCBs) provide essential MCCB protection. This is by safeguarding electrical circuits from various faults. Primarily, MCCBs protect against overloads. The latter occurs when the current exceeds the circuit’s capacity for an extended period. They also offer MCCB short-circuit protection.

What is the lifespan of an MCCB?

The typical lifespan of an MCCB can vary depending on usage, environmental conditions, and maintenance. Generally, MCCBs are designed to last between 15 to 30 years. Regular maintenance and periodic testing ensure the MCCB functions correctly throughout its service life. For specific details about the longevity of particular models, such as the iALLWAY MCCBs, consult the manufacturer’s guidelines.

Does MCCB protect from electric shock?

No, molded case circuit breakers do not protect humans from electric shock. MCCBs mainly protect electrical circuits from damage. They even prevent fires caused by electrical faults. For protection against electric shock, residual current devices (RCDs) or ground fault circuit interrupters (GFCIs) are typically used in conjunction with MCCBs.

What is the reason for the failure of an MCCB?

Several reasons are attributed to the failure of an MCCB:

• Wear and Tear: Prolonged use of MCCB can lead to mechanical or electrical wear. 
• Environmental Conditions: Extreme temperatures, humidity, or corrosive environments can affect performance.
• Overloading: Repeated or excessive overloading can damage the breaker.
• Improper Installations: Incorrect wiring or installation can cause malfunction. 

Does MCCB have earth fault protection?

Yes, many MCCBs come with MCCB earth fault protection. This feature detects ground faults that occur when electricity flows to the earth due to insulation failure or other issues. The MCCB will trip to disconnect the circuit. Thus, it reduces the risk of electric shock and potential damage.

What is the range of MCCB protection?

The range of MCCB protection typically includes protection against overloads, short circuits, and earth faults. For instance, the iALLWAY iALM7 series provides comprehensive protection for various applications, including AC and DC circuits. 

The iALM7DC series offers protection with a maximum rated voltage of 1500V and a breaking capacity of up to 20kA, while the iALM7HU series supports up to 50kA breaking capacity at 800V AC.

What are the requirements for MCCB?

To ensure effective operation, an MCCB should meet several requirements:

• Current Rating: Must match the circuit’s current requirements.
• Breaking Capacity: Should handle the maximum short-circuit current.
• Environmental Conditions: Must be suitable for the operating environment, including temperature and humidity.
• Compliance: Should meet relevant standards such as IEC 60947-1 and IEC 60947-2 for reliable performance.

Introducing iALLWAY

iALLWAY Electric stands out as a top player in the moulded case circuit breaker (MCCB) industry. iALLWAY has a remarkable response time to its inquiring customers. By doing so, the team promptly addresses customer concerns.

iALLWAY Electric’s team of electrical experts brings extensive knowledge and innovative capabilities to the table. Their expertise spans traditional electrical product design and manufacturing. This deep understanding enables them to design and produce smarter, more efficient MCCBs.

Furthermore, iALLWAY Electric is committed to uncompromising quality and performance. Through rigorous quality testing, the company minimizes product failure rates.