OT1250E03CP ABB 1250 A 3-Pole Manual Changeover Switch

Why Choose the ABB OT1250E03CP Manual Changeover Switch?

The ABB OT1250E03CP is a heavy-duty 1250 A three-pole manual changeover switch designed for reliable source selection in high-current low-voltage power distribution systems. Part of ABB's OT changeover switch range, it provides a robust manually operated solution for transferring loads between two electrical supplies.

The OT1250E03CP uses an open-transition I-0-II switching arrangement with a stable OFF position, ensuring that one supply is disconnected before the alternative supply is connected. Its three-pole construction is designed for simultaneous switching of three conductors in three-phase power systems.

Rated at 1250 A, the OT1250E03CP provides AC-21A and AC-22A switching at 1250 A up to 415 V and an AC-23A rating of 1250 A / 710 kW at 400–415 V. It is supplied with a black plastic IP65 I-0-II pistol handle, operating shaft and bolt set for cable connection, providing a complete manual changeover solution for demanding switchboard installations.

Key Advantages

• 1250 A manual changeover switch for high-current source-selection applications.
• Three-pole configuration for three-phase power systems.
• Open-transition I-0-II operation provides break-before-make source transfer.
• Stable centre OFF position provides a defined isolation state between sources.
• 1250 A AC-21A and AC-22A rating at up to 415 V.
• 1250 A / 710 kW AC-23A rating at 400–415 V.
• 50 kA short-time withstand current for 1 s supports demanding distribution systems.
• Supplied with an IP65 black plastic I-0-II pistol handle, shaft and cable-connection bolt set.

Key Features

• ABB OT series manual changeover switch.
• 1250 A rated operational current.
• 3-pole construction.
• I-0-II switching positions.
• Open-transition operation with stable OFF position.
• 1000 V rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 50 kA rated short-time withstand current for 1 s.
• Manual front operation with mechanism on the left side.
• Base-mounted construction.
• Black plastic IP65 pistol-type operating handle.
• Handle padlockable in the OFF position.
• Door interlocking in the I and II positions and when padlocked.

High-Current Manual Source Selection with Open Transition

Manual changeover switches provide a direct and dependable method of selecting between two electrical supplies without requiring a motor operator or automatic transfer controller. The ABB OT1250E03CP uses an I-0-II operating sequence with a stable centre OFF position, providing break-before-make transfer so that the connected source is isolated before the alternative source is selected.

With its 1250 A three-pole construction, 50 kA short-time withstand capability and strong AC-23A switching performance, the OT1250E03CP is suited to demanding high-current distribution systems. Its padlockable operating handle and door-interlocking functionality also support controlled operation and secure isolation within industrial and commercial switchboards.

Typical Applications

• Mains and generator manual changeover systems.
• Dual-supply low-voltage distribution systems.
• High-current industrial switchboards.
• Standby power source selection.
• Commercial and infrastructure power distribution.
• Three-phase industrial electrical systems.
• OEM switchgear and power distribution assemblies.