Why Choose the ABB EK550-40-11 400-415 V 50 Hz Contactor?
The ABB EK550-40-11 (Part Number: SK827041-AR) is a heavy-duty 4-pole industrial contactor designed for switching high-current AC and DC power circuits in demanding industrial, distribution and railway applications. As part of the proven ABB EK contactor series, it delivers dependable switching performance, long mechanical life and robust construction for critical power control systems.
Equipped with a 400-415 V AC 50 Hz control coil, the EK550-40-11 is ideal for industrial installations operating on standard three-phase control supplies. Its block-type design incorporates 4 normally open main contacts together with 1 normally open and 1 normally closed auxiliary contact, providing flexibility for switching and monitoring applications.
With an impressive 800 A AC-1 rating, 550 A AC-3 rating and a maximum main circuit voltage of 1000 V AC, this contactor is ideally suited to industrial power distribution, heavy-duty machinery, railway systems and resistance heating applications requiring dependable high-current switching.
Key Advantages
- Heavy-duty 4-pole industrial contactor for demanding applications.
- 800 A AC-1 switching capacity for high-current industrial loads.
- 400-415 V AC 50 Hz control coil.
- Suitable for AC and DC switching applications.
- Supplied with 1 NO and 1 NC auxiliary contact.
- Designed for industrial power distribution and railway systems.
Key Features
- ABB EK contactor series.
- 4 normally open (4 NO) main contacts.
- 1 normally open + 1 normally closed auxiliary contact.
- 800 A rated operational current (AC-1).
- 550 A rated operational current (AC-3).
- 400-415 V AC 50 Hz control coil.
- Heavy-duty block construction.
- Main circuit bar terminals with screw and bolt connections.
Reliable High-Current Power Switching
The ABB EK550-40-11 is engineered for dependable switching of high-current electrical loads in industrial installations. Its heavy-duty contacts and robust construction provide reliable operation in electrical distribution systems, heating equipment and large industrial machinery where continuous performance is essential.
Compatible with ABB auxiliary contact blocks and accessories, the EK series offers flexibility for OEM machinery, industrial control panels and electrical switchboards while maintaining excellent operational reliability in demanding environments.
Typical Applications
- Industrial power distribution systems.
- Railway electrical installations.
- Resistance heating equipment.
- Large industrial switchboards.
- Heavy-duty machinery.
- OEM electrical control panels.
