ABB SK827040-AL EK370-40-11 Contactor

• Brand
  ABB
• Model
  EK370-40-11
• Product Name
  4-Pole Electromagnetic Contactor
• Country of Origin
  Sweden
• HS Code
  85364900
• Dimensions
  270 mm Width x 225 mm Height x 225 mm Depth
• Weight
  17.2 kg
• Operating Temperature
  -25°C to +55°C (-13°F to +131°F)
• Storage Temperature
  -40°C to +70°C (-40°F to +158°F)
• Part Number
  SK827040-AL
• Warranty
  12 month
• Product Status
  New and original

ABB SK827040-AL EK370-40-11 Input & Output (Main & Auxiliary Contacts)
Main Pole Configuration: 4 Power Poles (4 Normally Open / 4PST-NO).
Rated Control Circuit Voltage ($U_c$): 220V to 230V AC at 50 Hz.
Rated Operational Current AC-1 ($I_e$): Typically supports up to 550 A to 600 A under conventional free air thermal currents at 40°C (depending on terminal connection geometry and voltage).
Rated Insulation Voltage ($U_i$): 1,000 V conforming to IEC 60947-4-1 standards (600 V according to UL/CSA).
Rated Impulse Withstand Voltage ($U_{imp}$): 8 kV.
Auxiliary Contact Configuration: 1 Normally Open (NO) + 1 Normally Closed (NC) built-in block.
Coil Power Consumption: * Pull-in power at maximum rated control voltage (50 Hz): 3,500 VAHolding power at maximum rated control voltage (50 Hz): 140 VA

ABB SK827040-AL EK370-40-11 Wiring & Connection Methods
Main Circuit Terminal Configuration: Main power poles are engineered with flat busbar-style connection terminals. Connections are completed using heavy-gauge copper busbars or large lug-terminated cables secured directly with the provided industrial high-torque screws and bolts.
Control and Auxiliary Wiring: The control coil and auxiliary blocks feature standard screw terminals. These terminals are rated to IP20 degree of protection, providing touch-safe security against accidental finger contact during maintenance.
Terminal Preparation: Always deliver and verify that the connecting terminals are open before attempting wiring. Ensure that clean, unoxidized copper bars or ferrules are used to limit contact resistance under high-ampacity loads.
Coil Energization Path: Connect the 220–230V AC 50 Hz control line to the designated $A_1$ and $A_2$ coil terminals. Ensure that control circuit fusing or isolation switches match the 3,500 VA pull-in rush demand to prevent unnecessary tripping during contactor closure.
Auxiliary Interlocking: Wire the built-in 1 NO + 1 NC contacts into your local control logic panel or programmable logic controller (PLC) status loop to provide positive feedback verification of the contactor's physical position

ABB SK827040-AL EK370-40-11 Product Advantages & Key Features
Optimized for Dual AC/DC Power Switching: Engineered specifically to manage both AC power distribution grids and complex DC railway circuits effectively within a single structural footprint.
Built-in Coil Interface Mitigation: Designed with an advanced internal coil framework that drastically reduces electromagnetic disturbances, eliminating the typical requirement for external surge suppressors on this physical frame size.
Substantial Fault Current Endurance: Possesses a rated short-time withstand current ($I_{cw}$) capable of enduring extreme structural faults (e.g., up to 5,500 A for a duration of 1 second from a cold state).
Industrial-Grade Open Frame Architecture: Built with high insulation materials and an easy-access layout that simplifies structural status inspections and field component longevity.

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  ABB SK827040-AL EK370-40-11
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