abb Automatic transfer switch 125 amps with 2 Poles

Why Choose the ABB OTM125F2C21D230C Automatic Transfer Switch?

The ABB OTM125F2C21D230C is a compact and highly reliable automatic transfer switch (ATS) designed to provide uninterrupted power transfer between two electrical power sources in industrial, commercial and critical infrastructure applications. As part of the professional ABB Compact ATS range, this motor-operated switch ensures dependable automatic changeover functionality for standby power systems and generator installations.

Featuring a 125A rated operational current, 2-pole switching configuration and 220–240V AC motor operational voltage, the OTM125F2C21D230C is engineered for safe and efficient source transfer in demanding electrical systems. The unit includes a self-supplied controller with adjustable operating parameters, simplifying installation while improving operational reliability.

Designed with open transition type 1-0-2 switching, the ABB OTM125F2C21D230C provides secure transfer between normal and backup power supplies while reducing downtime during mains failure events. Its compact dimensions and flexible base or DIN rail mounting options make it ideal for modern electrical distribution panels and industrial automation systems.

Key Advantages

• Reliable automatic transfer switch for standby power systems.
• 125A rated current suitable for industrial and commercial installations.
• Motor-operated switching mechanism for automatic source transfer.
• 2-pole open transition switching with 1-0-2 operation.
• Self-powered controller with adjustable operating parameters.
• Compact construction with DIN rail or base mounting flexibility.

Key Features

• ABB Compact ATS automatic transfer switch.
• 125A operational current.
• 2-pole switching configuration.
• 220–240V AC motor operating voltage.
• Open transition type 1-0-2.
• Direct-mounted handle operation.
• Self-supplied controller type 21D.
• Suitable for standby power and generator systems.

Technical Specifications

• Manufacturer: ABB
• Series: Compact ATS
• Model: OTM125F2C21D230C
• Product type: Automatic transfer switch
• ABB Product ID: 1SCA151418R1001
• Rated operational current AC-21A: 125A
• Rated operational current AC-23A: 90A
• Rated operational power AC-23A: 45kW at 380–415V
• Number of poles: 2P
• Motor operational voltage: 220–240V AC
• Rated insulation voltage (Ui): 800V
• Rated impulse withstand voltage (Uimp): 8kV
• Transition type: Open transition
• Switch positions: 1-0-2
• Mounting type: Base mounting or DIN rail mounting
• Terminal type: Screw terminals
• Protection rating: IP20 front protection
• Short-time withstand current: 2.5kA for 1 second
• Dimensions (W × H × D): 233 × 103 × 131 mm
• Weight: approx. 1.85 kg
• EAN: 6417019818238

Reliable Automatic Power Transfer for Critical Applications

Automatic transfer switches such as the ABB OTM125F2C21D230C continuously monitor available power sources and automatically transfer electrical loads between primary and backup supplies during mains failure events. This ensures uninterrupted operation of critical systems while helping protect industrial processes and essential equipment.

The ABB Compact ATS range is designed for industrial and commercial applications where dependable power continuity, compact installation and operational safety are essential. Its motor-operated mechanism and integrated controller provide efficient automatic switching for standby generators, backup systems and dual-supply installations.

Typical Applications

• Standby generator systems.
• Commercial backup power installations.
• Industrial automation systems.
• Critical infrastructure and data centres.
• Power continuity and emergency systems.
• Electrical distribution and changeover panels.

Trusted by Electrical Engineers Worldwide

ABB Compact ATS automatic transfer switches are trusted by electrical engineers and panel builders for reliable source transfer, dependable standby power management and robust industrial performance.