abb Automatic transfer switch 400 amps with 3 Poles

Why Choose the ABB OTM400E3C8D230C Automatic Transfer Switch?

The ABB OTM400E3C8D230C is a heavy-duty and highly reliable automatic transfer switch (ATS) designed for dependable source switching in industrial, commercial and critical standby power systems. As part of the advanced ABB OTM motorised change-over switch range, this switch automatically transfers electrical loads between primary and backup power sources to maintain operational continuity during mains supply interruptions.

Engineered for demanding low-voltage power distribution applications, the ABB OTM series combines intelligent motorised operation, robust electrical endurance and compact switchboard-friendly construction. ABB transfer switches are trusted worldwide by electrical engineers, OEM panel builders and industrial contractors where reliable automatic source transfer and system uptime are essential.

With a 400 A operational current rating, 3-pole switching configuration and a 220–240 V AC motor operating voltage, the OTM400E3C8D230C is ideal for automatic mains-to-generator transfer systems, industrial switchboards and commercial backup power installations. The integrated OMD800 LCD controller with keypad and voltage sensing functionality provide safe and efficient automatic operation in demanding environments.

Key Advantages

• Heavy-duty automatic transfer switch for standby power systems.
• 400 A operational current rating for industrial and commercial installations.
• 3-pole switching configuration for phase conductor transfer.
• Reliable motorised automatic source transfer operation.
• Integrated OMD800 LCD controller with keypad.
• Suitable for generator and dual-source power systems.

Key Features

• ABB OTM motorised change-over switch series.
• 400 A rated operational current.
• 3-pole automatic transfer switching.
• 220–240 V AC motor operating voltage.
• Integrated voltage sensing kit mounted on the switch.
• OMD800 LCD controller with keypad.
• Open transition switching operation.
• Manual emergency operating handle included.
• Compact switchboard installation format.

Technical Specifications

• Manufacturer: ABB
• Series: OTM Motorised Change-over Switches
• Model: OTM400E3C8D230C
• Product type: Automatic transfer switch
• Rated operational current: 400 A
• Number of poles: 3P
• Motor operational voltage: 220–240 V AC
• Controller type: OMD800 LCD with keypad
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 12 kV
• Rated operational voltage: 1000 V AC
• Frequency: 50 / 60 Hz
• Short-time withstand current: 20 kA for 1 second
• Rated operational power AC-23A: 132 kW at 230 V, 220 kW at 400 V, 315 kW at 500 V, 400 kW at 690 V
• Power loss: approx. 8 W
• Mounting type: Base mounting
• Protection rating: Front IP20
• Transition type: Open transition
• Position of line terminals: Top in - Bottom out
• Dimensions (H × W × D): approx. 325 × 367 × 235 mm
• Weight: approx. 16 kg

Reliable Automatic Source Transfer for Critical Installations

Automatic transfer switches such as the ABB OTM400E3C8D230C continuously monitor available power sources and automatically transfer electrical loads during mains failures or generator startup events. This helps minimise downtime while maintaining continuity for critical systems and infrastructure.

The ABB OTM range is widely used in industrial facilities, generator installations and low-voltage power distribution systems where dependable automatic source transfer and compact switchboard integration are essential. Its integrated motorised mechanism, voltage sensing functionality and OMD800 controller simplify installation while improving operational reliability.

Typical Applications

• Automatic mains and standby generator transfer systems.
• Industrial switchboards and power distribution panels.
• Commercial buildings and facilities management.
• Backup power and emergency supply systems.
• Manufacturing and process control installations.
• Critical infrastructure and power continuity applications.

Trusted by Electrical Engineers Worldwide

ABB OTM automatic transfer switches are trusted worldwide for dependable source transfer performance, compact construction and reliable operation in critical power systems.