High power and durable proportional relay

Celduc's SVTA series offers advanced phase cut relays designed specifically for industrial applications requiring precise and reliable power control. These high-performance solid-state relays use analog proportional control, allowing the output current to be controlled with high precision.

Available in multiple power ratings ranging from 3x50A, 3x95A to 3x125A, the SVTA series is equipped with thyristors optimized for both ohmic and inductive loads. The maximum continuous current is 125A for ohmic loads, such as heating elements, and up to 30A for inductive loads, such as electric motors. This flexibility makes the SVTA suitable for a wide range of industrial applications.

SVTA relays are designed to minimize EMC problems. This is achieved by incorporating six adjustable thyristors, which provide balanced current distribution and significantly reduce harmonics. This results in improved electrical performance and reduces disturbances in sensitive equipment.

The proportional control can be easily adjusted via a potentiometer or by using an external 0-10V or 0-20mA signal. The output signal is protected against overcurrent and voltage spikes by means of an integrated RC network or a Varistor, further increasing reliability in industrial environments.

Applications The SVTA relays can be used in a variety of industrial systems, including:

• Control of heating elements.
• Lighting controls, from conventional to LED and infrared lighting.
• Control of motors (from 60% to 100% load).
• Inductive loads such as transformers, coils and rectifiers.

Due to the solid-state design of the SVTA relays, with no mechanical and wear parts, these relays offer excellent reliability and long life. The guaranteed lifetime of more than 50,000 hours, even in harsh industrial environments, makes the SVTA the ideal choice for modern industrial automation.