OT400E04CLP ABB 400 A 4-Pole Closed-Transition Manual Changeover Switch

Why Choose the ABB OT400E04CLP 400 A 4-Pole Closed-Transition Manual Changeover Switch?

The ABB OT400E04CLP is a heavy-duty 400 A 4-pole closed-transition manual changeover switch designed for controlled source transfer in low-voltage power distribution systems. Part of the ABB OT Changeover Switches range, it provides robust manual switching for industrial switchboards, distribution equipment and specialised power-transfer installations.

The OT400E04CLP operates on a make-before-break closed-transition principle using an I-I+II-II sequence. Between positions I and II, the switch passes through an intermediate I+II position in which both switching paths are closed simultaneously, eliminating the OFF position used by conventional open-transition changeover switches.

Rated at 400 A, the OT400E04CLP provides 400 A AC-23A switching capability at 380–415 V with an operational power rating of 220 kW at 400 V. It is supplied with a black plastic IP65 I-I+II-II pistol-type handle, operating shaft and cable connection bolt set, providing the principal components required for manual operation.

Key Advantages

• Heavy-duty 400 A closed-transition manual changeover switch.
• 4-pole configuration for simultaneous switching of four conductors.
• I-I+II-II make-before-break operation without an OFF position.
• Intermediate I+II position closes both switching paths simultaneously.
• 400 A AC-23A switching capability at 380–415 V.
• 220 kW AC-23A operational power at 400 V.
• Supplied with IP65 pistol-type handle, operating shaft and cable connection bolt set.

Key Features

• ABB OT Changeover Switches range.
• 400 A rated current.
• 4-pole switching configuration.
• Manual I-I+II-II closed-transition operation.
• Make-before-break switching principle.
• Minimum contact overlap of 20 ms.
• 90° handle operating angle.
• 1000 V rated operational and insulation voltage.
• 12 kV rated impulse withstand voltage.
• 15 kA for 1 s rated short-time withstand current.
• Black plastic IP65 I-I+II-II pistol-type operating handle.

Closed-Transition Manual Power Source Changeover

The ABB OT400E04CLP uses a closed-transition, make-before-break operating principle. Instead of passing through an OFF position, the I-I+II-II sequence includes an intermediate I+II position where both switching paths are closed simultaneously, with a minimum overlap time of 20 ms.

Its 400 A rating, four-pole construction and strong AC-23A switching capability make the OT400E04CLP suitable for substantial electrical distribution systems specifically engineered for closed-transition operation. The supplied handle, shaft and connection hardware provide a practical package for integration into industrial switchboards and power-transfer assemblies.

Typical Applications

• Closed-transition manual power source transfer systems.
• Industrial low-voltage distribution switchboards.
• Four-pole electrical source-transfer systems.
• Industrial plant power distribution equipment.
• Commercial and infrastructure electrical installations.
• Specialised systems requiring I-I+II-II make-before-break operation.