Cam switch 100A, three-phase starter switch (0,Y,A), base-mounted front closing yellow/red SK100-4.831\BS08

Three-Phase Starter Switch – Reliable Motor Control

This three-phase cam switch SK100-4.831\BS08, designed for DIN rail mounting, is a key component in motor starting systems. It allows switching between 0-Y-Δ (star-delta) circuits, which is standard in applications requiring reduced inrush current and smooth starting of three-phase motors. The device's construction ensures high reliability and safe operation, and its robust design guarantees long-term operation even in demanding industrial conditions.

Construction and Application

The SK100 cam switch is a component used for manual switching of electrical circuits. In this model, the 0-Y-Δ configuration allows for efficient starting of three-phase motors, reducing inrush current and minimizing the load on the power supply network. It is intended for use in control cabinets, switchgear and transformer stations. DIN rail (TS35) mounting simplifies installation and integration with existing electrical infrastructure. The use of high-quality materials ensures resistance to external factors and long-term stability of operating parameters.

Key Features and Benefits

• Durability and Safety: IP65 protection rating guarantees resistance to dust and moisture, making it an ideal solution for industrial environments.
• High Power: Rated continuous current of 100A and rated operating power of 25kW at 400V allow it to handle even demanding applications.
• Universal Mounting: Possibility of indirect mounting on a DIN rail provides installation flexibility.
• Durable Construction: Made of plastic, it is characterized by high mechanical and chemical resistance.
• Safe Switching: It has a "0" position, allowing for safe disconnection of the circuit before starting maintenance or service work.
• Solid Connections: Screw connection of the main contacts ensures a secure and durable connection of the wires.
• Wide operating temperature range: From -40°C to +70°C allows operation in harsh environmental conditions.

Technical Parameters in Practice

A continuous rated current of 100A means that the switch can safely operate with a load of that value for a long time without risk of overheating or damage. A rated operating power of 25kW at a voltage of 400V demonstrates its ability to effectively control motors with significant power. The switching angle of 45°-90° ensures smooth and controlled motor starting, minimizing inrush current and extending the life of the device. The short-circuit withstand current Icw(1s) of 1.7kA and the short-circuit making current Icm of 2.5kA provide additional protection against the effects of short circuits and overvoltages.

Rated continuous current (Iu): 100 A Rated operating power AC-3 (400 V): 25 kW Protection degree (IP): IP65 Number of poles: 3 Type of main contact connection: Screw connection