Cam switch 25A, Three-phase reversing starter switch, in OB3 enclosure with a lockable front plate ŁK25R-5.8538\OB3Z

Three-phase direction-of-rotation reversing starter switch – reliability and versatility in one

This three-phase starter switch, with a rated current of 25A, is a robust solution for controlling electric motors. Designed for both industrial applications and more demanding commercial installations, it combines functionality, durability, and safety. The switch allows you to change the direction of motor rotation, which is crucial in many applications such as conveyors, construction machinery, or ventilation systems.

Design and application

The cam switch in an OB3 housing with a closed front provides high protection against external factors (IP65), making it ideal for operation in harsh conditions. Made of durable plastic, it is resistant to mechanical damage and corrosion. The possibility of indirect mounting facilitates integration with various control systems. The switch is used wherever reliable control of three-phase motors with reversing is required – from workshops and production halls to advanced technological lines.

Key features and benefits

• High switching power: The rated operating power for AC-3 is 13 kW at 400V, allowing control of motors with significant power.
• Durable construction: The plastic housing guarantees resistance to mechanical damage and environmental factors.
• Safety: IP65 protection provides protection against dust and water jets, increasing safety.
• Versatility: The ability to change the motor's direction of rotation expands the range of applications for the switch.
• Easy installation: The switch is adapted for indirect mounting, which facilitates its integration with existing installations.
• Reliability: Continuous rated current at 25A and high mechanical endurance (3 million switching cycles) ensure long-lasting and trouble-free operation of the device.
• Screw connection: Provides a secure and stable connection of the main conductors.
• Wide operating temperature range: From -40°C to +70°C allows operation in extreme environmental conditions.

Technical parameters in practice

The switch is characterized by high resistance to external conditions – this is confirmed by its high resistance to vibrations and mechanical shocks. Additionally, it meets safety standards regarding resistance to damp heat and salt mist. The cross-section of the connection cables 2.5…6 mm² ensures compatibility with most standard electrical installations. It is worth paying attention to the C characteristic, which allows it to react more slowly to short current surges – therefore, it tolerates starting devices with a motor well. It protects the circuit against overload and short circuit — like most circuit breakers in this class.