ABB OT Plus OT63G1-3BS63 A Load Break Switch, 3-Pole, 63 A, 690 V AC, Direct Handle, Frame G1

In industrial and commercial electrical installations, safely isolating circuits for maintenance or emergency shutdown is a critical requirement. The ABB OT Plus OT63G1-3BS63 A load break switch provides a robust solution, enabling reliable on-load making and breaking of currents up to 63 A. Its compact design and direct-operated rotary handle ensure straightforward operation, while the base mounting and screw terminals simplify integration into distribution boards and control panels.

Who is it for

This switch is intended for electrical engineers, panel builders, and maintenance technicians who need a dependable isolation device for three-phase circuits in industrial environments, commercial buildings, and infrastructure projects. It suits applications such as motor disconnects, main switches for sub-distribution, and safety isolators for machinery.

Main features

• Rated operational current of 63 A at 690 V AC, suitable for a wide range of loads.
• Three-pole configuration for three-phase systems.
• Direct operated rotary handle for clear ON/OFF indication and ease of use.
• High electrical durability of 2000 cycles and mechanical durability of 20000 cycles, ensuring long service life.
• Compact frame size G1 for space-saving installation.
• IP65 protection on the front with handle, suitable for demanding environments.
• Complies with IEC 60947-3 standard for safety and performance.

Specifications

• Product Type: Load Break Switch
• Number of Poles: 3
• Rated Operational Current (Ie): 63 A
• Rated Operational Voltage (Ue): 690 V AC
• Rated Impulse Withstand Voltage (Uimp): 8 kV
• Rated Insulation Voltage (Ui): 750 V
• Rated Short-time Withstand Current (Icw): 1 kA for 1 s
• Mounting Type: Base Mounting
• Handle Type: Direct Operated Rotary Handle
• Frame Size: G1
• Degree of Protection (IP): IP20 (Terminals), IP65 (Front with Handle)
• Standards: IEC 60947-3
• Electrical Durability: 2000 cycles
• Mechanical Durability: 20000 cycles
• Terminal Type: Screw Terminals
• Terminal Capacity (Main Circuit): 1.5 - 25 mm²
• Operating Temperature Range: -25 to +70 °C
• Power Loss: 3.5 W

Tips

For optimal performance, ensure the switch is mounted in a location with adequate ventilation and protected from excessive dust or moisture. Use appropriate cable lugs for the screw terminals to maintain reliable connections. Periodically inspect the handle mechanism for smooth operation.