EKM1-63H 10kA Min Circuit Breaker I TUV CB CE Certificate

The EKM1-63H MCB is a high-breaking capacity (10kA) miniature circuit breaker based on our classic L7-structure design. Developed from the EKM1-63 6kA model, this enhanced version is specifically engineered for utility bidding projects and high-end electrical distribution applications.

Q:What are the different between 4.5kA, 6kA and 10kA breaking capacity?
 

The ratings 4.5kA, 6kA, and 10kA refer to the Icu (Rated Ultimate Short-Circuit Breaking) of a Miniature Circuit Breaker (MCB), indicating the maximum fault current it can safely interrupt. The key differences and reasons for selecting each rating are outlined below.

Key Differences

1. Numerical Rating Variation:

   • 4.5kA rating means the MCB can safely interrupt a maximum short-circuit current of 4,500 Amperes.

   • 6kA rating means the MCB can safely interrupt a maximum short-circuit current of 6,000 Amperes.

   • 10kA rating means the MCB can safely interrupt a maximum short-circuit current of 1,000 Amperes.

2. Typical Application Scenarios:

   • 4.5kA MCBs are suitable for applications with lower prospective short-circuit currents, such as general socket outlets in small residential buildings.

   • 6kA MCBs are used for slightly larger loads or where protection requirements are more demanding, for example, lighting circuits in commercial buildings.

   • 10kA MCBs are typically specified for environments with high prospective fault currents, such as industrial plants or critical distribution circuits in large commercial complexes.
     
      

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