abb Automatic transfer switch 63 amps with 4 Poles

Why Choose the ABB OTM63F4C21D400C Automatic Transfer Switch?

The ABB OTM63F4C21D400C is a compact and dependable automatic transfer switch (ATS) engineered for secure power source switching in industrial, commercial and critical backup power applications. As part of the trusted ABB Compact ATS series, it enables automatic transfer between mains and standby power supplies while maintaining reliable electrical continuity and operational safety.

This motor-operated transfer switch integrates ABB’s proven switch-disconnector technology with advanced automatic transfer functionality, providing fast and secure source switching during power interruptions or generator startup conditions. Its compact footprint simplifies installation inside switchboards and electrical distribution panels.

With a rated operational current of 63 A, a 4-pole configuration, and a 380–415 V AC motor operating voltage, the OTM63F4C21D400C is ideal for commercial buildings, industrial automation systems, generator installations and critical infrastructure requiring reliable automatic power transfer. Its open transition switching operation ensures dependable and safe transfer between electrical sources.

Key Advantages

• Compact automatic transfer switch for reliable backup power management.
• 63 A operational current rating suitable for commercial and industrial systems.
• 4-pole open transition switching for automatic source transfer.
• Integrated motor-operated mechanism with automatic control functionality.
• Designed for dependable operation in generator and emergency power systems.
• Compact enclosure simplifies installation inside switchboards and control panels.

Key Features

• ABB Compact ATS automatic transfer switch series.
• 63 A rated operational current.
• 4-pole automatic transfer configuration.
• 380–415 V AC motor operating voltage.
• Open transition 1-0-2 switching operation.
• Integrated automatic controller functionality.
• Manual operating handle for local control.
• Compact design suitable for panel and switchboard integration.

Technical Specifications

• Manufacturer: ABB
• Series: Compact ATS
• Model: OTM63F4C21D400C
• Product type: Automatic transfer switch
• Rated operational current: 63 A
• Number of poles: 4P
• Rated operational voltage: 380–415 V AC
• Motor operational voltage: 380–415 V AC
• Rated operational power AC-23A: 41 kW
• Rated insulation voltage: 800 V
• Rated impulse withstand voltage: 8 kV
• Rated short-time withstand current: 2.5 kA for 1 second
• Transition type: Open transition
• Controller type: 21D
• Protection rating: Front IP20
• Mounting type: Base mounting or DIN rail mounting
• Terminal type: Screw terminals
• Dimensions (W × H × D): approx. 233 × 130 × 131 mm
• Weight: approx. 2.1 kg
• Standards: IEC 60947-3

Reliable Automatic Power Transfer for Critical Systems

Automatic transfer switches such as the ABB OTM63F4C21D400C automatically transfer electrical loads between primary and standby power supplies during mains failures or maintenance operations. This helps maintain operational continuity while protecting critical systems and electrical infrastructure.

ABB Compact ATS devices are widely used by electrical engineers, panel builders and OEM manufacturers due to their compact dimensions, reliable switching performance and simplified installation. The integrated motor-operated mechanism provides secure and consistent source transfer functionality for industrial and commercial environments.

Typical Applications

• Generator backup and emergency power systems.
• Commercial building power distribution.
• Industrial process and automation systems.
• Critical infrastructure and utility installations.
• HVAC and building services equipment.
• Main switchboards and electrical control panels.

Trusted by Electrical Professionals Worldwide

ABB Compact ATS transfer switches are trusted by industrial engineers, electrical contractors and panel builders for dependable automatic source transfer, robust switching performance and compact installation.