EKM6-400H 400A Enhanced Circuit Breaker with Superior Insulation for Critical Applications

Standard: IEC60947-2

Poles: 3P

Frame Current: 400A

Rated Current: 250,280,315,350,400A

Rated voltage: 800/1000/1140V

Rated insulation voltage: 1250V

Rated impulse withstand voltage: 12kV

Trip unit technology: Thermal-magnetic

Ambient Temperature: -25...+40 ºC

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Product Introduction

EKM6-400H represents advanced circuit protection technology for demanding industrial environments. This premium 400A moulded case circuit breaker features enhanced 1250V insulation voltage, making it suitable for high-voltage applications where standard MCCBs may be insufficient.

 

With five adjustable current settings ranging from 250A to 400A, the EKM6-400H offers precise protection tailoring to match specific load requirements. Its exceptional short-circuit performance includes a breaking capacity (Icu) of 50kA at 800V, 20kA at 1000V, and 15kA at 1140V, while providing an improved service breaking capacity (Ics) of 37.5kA at 800V.

 

Engineered to stringent IEC60947-2 standards, this 3-pole MCCB incorporates sophisticated thermal-magnetic trip technology that maintains consistent performance across operating temperatures from -25°C to +40°C. With a mechanical durability of 20,000 operations and electrical durability of 1,500 operations, the EKM6-400H delivers reliable protection for critical infrastructure, heavy machinery, and industrial power distribution systems.

Product Parameters

Model

EKM6-400H

Ampere frame (Inm)

400A

Rated current (In)

250,280,,315,350,400A

Rated insulation voltage (Ui)

1250V

Rated impulse withstand voltage (Uimp)

12kV

Rated operational voltage (Ue)

800V, 1000V, 1140V

Rated ultimate short-circuit

Breaking capacity (Icu) kA

800V

50

 

1000V

20

 

1140V

15

Rated service short-circuit breaking capacity (Ics) kA

800V

37.5

 

1000V

15

 

1140V

15

Isolation function

Available

Utilization category

Cat.A

Type of trip unit

Thermal-Magnetic

Mechanical life (Times)

20000

Electrical life (Times)

1500

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Strategic Vision for a Sustainable Future
Looking ahead, ETEK Electric remains committed to becoming a globally renowned manufacturer in the new energy and electrical protection industry. We continue to focus on:
Developing innovative green energy solutions
Enhancing product safety and reliability
Expanding our sustainable technology portfolio
Supporting global energy transformation
Contributing to a low-carbon future

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