20A reversing starter switch, direction of rotation change switch L-0-P, in OB12 enclosure with yellow/red sealed front cover SK20-3.8368\OB12ZC

Cam switch – reliable motor control

This three-pole cam switch, designed for mounting in OB12 enclosures with yellow and red lockable fronts, is a robust solution for controlling electric motors. It allows changing the direction of rotation (L-0-P) and is ideal for both professional installers and end-users who need a reliable and safe solution.

The enclosure provides protection against environmental conditions, and the screw connection simplifies installation and wiring.

Construction and application

The SK20 cam switch is an element used for manual switching of electrical circuits. In this specific model, the L-0-P configuration allows changing the direction of rotation of a three-phase motor. The OB12 enclosure made of plastic provides insulation and protection against mechanical damage. The IP65 protection rating guarantees resistance to dust and water jets, making it suitable for use in harsh industrial environments. The switch with a knob provides convenient and intuitive operation.

Key features and benefits

• Durability and reliability: Designed to operate with a rated current of 20A and has high resistance to environmental conditions (IP65).
• Versatility: Can be used in various electrical installations requiring a change in the direction of rotation of a three-phase motor.
• Safety: The plastic enclosure provides electrical insulation, and the IP65 protection rating protects against moisture and dust.
• Easy installation: Screw connection of wires simplifies installation and connection to the existing electrical installation.
• Wide voltage range: Rated insulation voltage is 690V, allowing use in various electrical systems.
• Durable construction: Made of high-quality materials ensuring long-term operation (mechanical durability 3 million switching cycles).
• Rated switching power AC-3: 4 kW at 400V – allows controlling motors with appropriate power.
• Resistance to external factors: Withstands vibrations, shocks and cyclic damp heat according to IEC standards.

Technical parameters in practice

The rated continuous current Iu is 20A, which means the switch can safely operate with a load of that intensity for a long time. The rated switching power Pe in category AC-3 is 4 kW at 400V – this is a key parameter when selecting the switch for a specific motor. The rated conventional short-circuit current of 10kA indicates the ability to withstand short-term overloads associated with motor starting. The IP65 protection rating means complete protection against contact and protection against a water jet from any direction – an ideal solution for workshops or production halls.