OTPS125FD ABB Fourth Pole for OT100–125ET3

Why Choose the ABB OTPS125FD Fourth Pole?

The ABB OTPS125FD, part number 1SCA105096R1001, is a purpose-designed fourth pole for ABB OT100–125ET3 switch-disconnector applications. As part of the ABB OT/OETL accessories range, it enables a compatible three-pole switch-disconnector to be equipped with an additional switched pole.

The OTPS125FD features simultaneous operation with the main contacts, so the fourth pole operates together with the three primary switch poles. It mounts on the side of the compatible switch frame and is intended for compatible ABB OT100 and OT125 switch-disconnectors, including door-mounted OT100–125FT3 configurations.

With compact dimensions of approximately 45 × 100 × 49 mm and a net weight of approximately 0.115 kg, the OTPS125FD provides a manufacturer-matched solution for four-pole switching arrangements in industrial distribution, machinery and isolation systems.

Key Advantages

• Purpose-designed fourth pole for ABB OT100–125ET3 applications.
• Simultaneous operation with the main contacts.
• Allows compatible three-pole switchgear to be configured with an additional switched pole.
• Designed for side mounting on the switch frame.
• Suitable for compatible ABB OT100 and OT125 switch-disconnectors.
• Compatible with door-mounted OT100–125FT3 configurations.
• Compact design for straightforward integration into switchgear assemblies.
• Manufacturer-matched ABB accessory for professional low-voltage installations.

Key Features

• ABB OTPS125FD fourth pole.
• Simultaneous switching function.
• Operates together with the main switch contacts.
• Designed for ABB OT100–125ET3.
• Suitable for OT100 and OT125 switch-disconnectors.
• Suitable for compatible OT100–125FT3 door-mounted switches.
• Side-mounted accessory design.
• Product main type: OTPS125.
• Supplied as 1 piece.
• Part of ABB's modular OT switch-disconnector accessory system.

Simultaneous Fourth-Pole Switching for ABB OT Switchgear

The ABB OTPS125FD provides an additional switched pole that operates simultaneously with the main contacts of the compatible switch-disconnector. This distinguishes it from late-break and early-make fourth-pole accessories, where the additional pole intentionally operates at a different point in the switching sequence.

Mounted on the side of compatible OT100 and OT125 equipment, the OTPS125FD provides a straightforward way to create a four-pole switching arrangement using ABB's modular OT platform. This makes it suitable for distribution and isolation applications where all four conductors are required to switch together.

Typical Applications

• ABB OT100–125ET3 switch-disconnector installations.
• Compatible OT100–125FT3 door-mounted switch arrangements.
• Four-pole electrical isolation systems.
• Industrial electrical switchboards.
• Machinery isolation panels.
• Power distribution equipment.
• Industrial control and automation panels.
• Installations requiring an additional pole to switch simultaneously with the three main contacts.