ATS system on 70A contactors

ATS systems on a contactor – automatic safety on the smallest scale

Contactor-based standby power supply (ATS) cabinets are a compact and reliable solution that automatically switches power between the mains and the generator. The basic version operates based on a signal from the generator, ensuring simple and proven operation. The extended version, with its own ComAp controller, allows for the control of multiple ATS cabinets with a single generator and the construction of more complex automation systems. Upon request, the ATS can be manufactured in a four-pole version and adapted for outdoor operation.

SZR 70 system – automatic switching at power up to 43 kVA

What is SZR 70?

The SZR 70 is a backup power supply cabinet based on the reliable LC1E50P7 three-pole contactor, with a rated current of 70 A and a power of 43 kVA . In the basic version, control is performed from a generator (e.g., AMF 25), which enables safe power switching without complicated operation.

Key technical parameters of the SZR 70

• Rated power: 43 kVA

• Rated current (AC-1): 70 A

• Rated current (AC-3): 50 A

• Nominal voltage: 400/230 V

• Frequency: 50 Hz

• Contactor type: LC1E50P7 (three-pole)

• Control: from the unit – AMF 25 (basic version)

• Lock type: mechanical/electric

• Protection class: IP 43

• Connection cable: 16 mm²

• Operating temperature range: -25°C to +40°C

• Operating conditions: up to 2000 m above sea level

• Dimensions (L x W x H): 800 x 600 x 300 mm

• Weight: 38 kg

What makes the SZR 70 stand out?

• Robust three-pole contactor – reliable switching even with low loads.

• Mechanical and electrical interlock – safe operation.

• Simple configuration – automation controlled by a signal from the generator.

• IP 43 housing – ready to work in various conditions.

• Possibility of making a four-field version.

Additional features – SZR 70 with its own controller

The extended version of the SZR 70 can be equipped with the ATS2-70 controller, which enables:

• Operation of several ATS cabinets with one generator.

• Construction of more complex automation systems.

• Online work monitoring – even greater control and security.

Optional equipment SZR 70

• Foundation plinth: weight 14.5 kg, height 500 mm

• Ground plinth: weight 19 kg

• Set for external installation: roof, controller cover, heater

• Four-field version - on request

• Additional sockets and security features – according to your needs

Choose a reliable power supply with SZR 70

The SZR 70 is a compact, reliable and expandable solution – wherever automatic power switching is crucial.

Have any questions? Contact us – we'll help you choose the best ATS system for your installation!