SOCOMEC SIRCO 0T510058 1250A Switch

The SOCOMEC SIRCO 0T510058 is a high-capacity manual transfer switch rated for 1250A and 1000V. Part of the SIRCO series, this device is used for safe disconnection and selection between two power sources (e.g., utility and generator) in industrial electrical distribution systems. It is designed for heavy-duty applications requiring high reliability and operational safety.

Technical Specifications

The 0T510058 switch has a rated thermal current (Ith) of 1250A and a rated insulation voltage (Ui) of 1000V AC. It is suitable for AC-22A and AC-23A utilization categories, meaning it can switch resistive and moderate inductive loads, as well as motor loads. The switch has 4 poles (3 phases + neutral) with a positive break indication. The short-time withstand current (Icw) is 10 kA for 1 second. The switch is designed for front operation with a door-mounted handle. The dimensions are approximately 500 mm wide, 250 mm high, and 200 mm deep. It weighs approximately 15 kg.

Features and Construction

The SIRCO series switches feature silver-nickel contacts for low contact resistance and long life. The switching mechanism is spring-assisted, providing quick make-and-break action regardless of handle speed. The switch includes a padlockable handle (up to 3 padlocks) for lockout/tagout safety. The enclosure (optional) can be rated up to IP65. The switch has visible contact indication through the handle position. It is compliant with IEC 60947-3 and UL 508 standards.

Applications

This transfer switch is used in main distribution boards, generator paralleling systems, and critical power applications such as data centers, hospitals, and industrial plants. The 1250A rating makes it suitable for large facility feeders. The switch can be used for manual transfer between two sources, or as a main isolating switch for maintenance safety.

Installation and Operation

The switch is mounted on a backplate or inside an enclosure using the supplied mounting brackets. The copper busbars or cables are connected to the terminals (bolt-type). The operating handle is installed on the enclosure door with a shaft connecting to the switch mechanism. The handle positions are clearly marked: 0 (off), I (source 1), II (source 2). The switch includes an interlock to prevent switching between sources while under load, though it is designed for load-breaking capability. Periodic inspection of contact wear and tightening of terminals is recommended.

Safety and Compliance

The SIRCO 0T510058 features a positive break mechanism that ensures the contacts open even if the handle is forced. The switch provides double insulation between the operating handle and live parts. It is certified by CE, UL, and CSA. The switch meets the requirements for isolation according to IEC 60947-1. For applications requiring motorized operation, optional motor drives are available. The product is supported by Socomec's global technical service network.