Cam switch 25A, Three-phase starter switch (0,Y,A), in OB3 enclosure. ŁK25-4.831\OB3

Three-phase starter switch – a reliable choice for your installation

This three-phase cam switch with a rated current of 25A, in a robust OB3 enclosure, is a key component in motor starting systems. Designed for switching 0-Y-∆ (star-delta) circuits, it ensures safe and efficient starting of three-phase motors. The product from SPAMEL, known for its solidity and durability, guarantees long-term and trouble-free operation.

Functionality and application

The cam switch ŁK25-4.831\OB3 is primarily used in the starting of three-phase motors, where switching from a star to a delta connection is required. This allows limiting the starting current, which protects the motor and the power supply network from overloads. Thanks to its solid construction and high IP65 protection class, it is suitable for operation in harsh industrial conditions. It is ideal for both professional installers and end-users looking for a reliable solution for motor control.

Key features and benefits

• Durable construction: The OB3 enclosure provides high resistance to mechanical damage and external factors.
• Designed for motor starting: Specifically designed for switching 0-Y-∆ circuits, optimizing the three-phase motor starting process.
• High resistance to environmental conditions: IP65 protection guarantees dust and water tightness, enabling operation in demanding conditions.
• Safety of use: The rated switching power AC-3 is 7 kW (at 230 V), 13 kW (at 400 V) and 10 kW (at 690 V), ensuring safe operation of devices.
• Durability: Designed for a large number of switching cycles – up to 3 million, which translates to a long device life.
• Wide temperature range: The ability to operate in a temperature range of -40°C to +70°C ensures reliability in various climatic conditions.
• Suitable for conductors with a cross-section of 2.5…6 mm²: Allows easy connection to the existing electrical installation.
• Rated conventional short-circuit current: 13 kA – provides protection against the effects of short circuits in the electrical installation.

Technical parameters in practice

The rated continuous current of 25A allows servicing a wide range of three-phase motors with power adapted to the needs of a specific application. High resistance to shocks and vibrations (compliant with IEC standards) ensures the switch maintains reliability even in industrial environments exposed to intense vibrations. A wide temperature range (-40°C to +70°C) allows its use both indoors and outdoors, provided adequate protection against atmospheric factors. The tightening torque of the terminals of 1.2 Nm ensures a secure connection of the conductors, minimizing the risk of loosening connections during operation.