EKM6-400H 400A Enhanced Circuit Breaker with Superior Insulation for Critical Applications
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Technical Data
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| Product Family ID | OS-ETK-EKM6-400H |
|---|---|
| Variant SKU Count | 5 |
| Supplier | ETK |
| Supplier Model | EKM6-400H |
| Product Type | MCB / Circuit Breaker |
| Available Current Ratings | 250A / 280A / 315A / 350A / 400A |
| Available Voltage Ratings | 800V, 1000V, 1140V |
| Rated Voltage | 800V, 1000V, 1140V |
| Rated Current | 250A / 280A / 315A / 350A / 400A |
| Frame Current | 400A |
| Frame Size / Ways | 400A |
| Rated Current | 250,280,,315,350,400A / 250A / 280A / 315A / 350A / 400A |
| Rated Voltage | 800V, 1000V, 1140V |
| System Voltage | 800V, 1000V, 1140V |
Product Overview
Five current ratings from 250A to 400A in a single MCCB frame for medium-power AC distribution in industrial and commercial PV plants. The 800V, 1000V, and 1140V AC ratings accommodate high-voltage distribution where standard 690V MCCBs are not acceptable.
The current range from 250A to 400A covers inverter outputs from approximately 150kW at 690V AC through to 480kW — useful for medium central inverters and distribution board main incomers at commercial plant scale.
400A main switch sizing is typical for plant output transformers feeding medium-voltage grid connections in commercial arrays. Coordinate the MCCB let-through energy with the transformer secondary protection to ensure the MCCB clears before the transformer thermal protection limit is reached.
Applications
Inverter output protection
AC distribution boards
EV and PV support circuits
Residential and commercial electrical BOS
Frequently Asked Questions
At what power level is a 400A AC MCCB required?
At 400V AC three-phase, 400A corresponds to approximately 276kW. At 690V AC, 400A handles approximately 478kW. Match the MCCB current rating to the maximum AC current the circuit will carry, not just the inverter rated power.
What breaking capacity does EKM6-400H provide?
Breaking capacity at rated voltage is confirmed from the product datasheet. Share the prospective short-circuit current at the installation point — typically calculated from the network fault level — and we verify the breaking capacity is adequate.
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