OT250E22WP ABB 250A 4-Pole Isolator Switch

Why Choose the ABB OT250E22WP 250A 4-Pole Isolator Switch?

The ABB OT250E22WP is a high-performance 250 A four-pole switch-disconnector / isolator designed for dependable load switching and electrical isolation in industrial and commercial low-voltage systems. As part of the ABB OT switch-disconnector series, it combines a compact design with wide phase spacing for integration into switchboards, distribution panels and industrial machinery.

This OT250 configuration features four switched poles, wide phase distance and an operating mechanism positioned between the poles. Phase barriers are fitted as standard, while a black ON-OFF operating handle and adjustable shaft are included. The handle provides IP65 protection when installed and is padlockable in the OFF position, supporting secure maintenance and service isolation.

With a conventional free-air thermal current of 250 A and AC-23A operational current of 250 A at 380–415 V, 500 V and 690 V AC, the OT250E22WP is suitable for demanding load-switching duties. It provides an AC-23A operational power rating of 145 kW at 400–415 V and is designed in accordance with IEC 60947-3.

Key Advantages

• Heavy-duty 250 A four-pole isolator and switch-disconnector.
• Wide phase distance provides additional spacing between phase connections.
• Mechanism positioned between the poles in the E22 configuration.
• 250 A AC-23A rating at 380–415 V, 500 V and 690 V AC.
• Phase barriers are supplied as standard for the wide-phase-distance configuration.
• Includes a black IP65 ON-OFF handle and adjustable shaft.

Key Features

• ABB OT switch-disconnector series.
• 250 A rated current.
• 4-pole switching configuration.
• Wide phase distance.
• E22 operating mechanism between the poles.
• 1000 V rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 8 kA rated short-time withstand current for 1 s.
• 30 kA rated short-circuit making capacity at 690 V.
• Fourth pole positioned on the right and switched simultaneously.
• Front-operated, base-mounted construction with lug terminals.
• Mechanical durability of 20,000 operations.

Reliable Four-Pole Isolation with Wide Phase Spacing

Switch-disconnectors provide a defined means of manually switching loads and isolating electrical circuits from their power supply. The four-pole ABB OT250E22WP switches all four poles simultaneously, while its wide phase spacing and standard phase barriers support practical integration into high-current low-voltage distribution assemblies.

The OT250E22WP combines a 250 A current rating, four-pole construction, wide phase distance and AC-23A switching capability. Its mechanism-between-the-poles configuration, included handle and shaft, and padlockable OFF position make it suitable for main-switch and maintenance-isolation duties in industrial electrical systems.

Typical Applications

• Industrial main-switch and isolation applications.
• Four-pole low-voltage distribution systems.
• Industrial switchboards and distribution panels.
• Machinery and process-equipment isolation.
• Maintenance and service disconnect applications.
• Industrial installations requiring wide phase spacing.