Why Choose the ABB OT400U04CP 400 A UL Manual Changeover Switch?
The ABB OT400U04CP (1SCA022771R2300) is a heavy-duty 400 A, four-pole UL/CSA manual changeover switch designed for reliable switching between two alternative electrical power sources. Part of the ABB OT range of changeover switches, this model features an open-transition ON–OFF–ON operating mechanism, making it suitable for industrial power distribution, standby generator installations and commercial electrical systems.
The OT400U04CP provides three clearly defined switching positions: I (ON), 0 (OFF) and II (ON). Its break-before-make operation disconnects one power source before connecting the other, helping prevent unintended parallel connection of independent supplies. The four-pole arrangement enables switching of three-phase conductors and a neutral conductor where required by the electrical installation design.
Rated at 400 A for UL 98 general-use applications at 600 V AC, the ABB OT400U04CP is supplied with a black IP65 operating handle, operating shaft and cable connection bolt kit. The handle supports padlocking in the OFF position and door interlocking, providing a practical manual power source selection solution for suitable electrical enclosures and switchboard assemblies.
Key Advantages
- 400 A UL/CSA-rated changeover switch for demanding industrial power applications.
- Four-pole construction supports suitable three-phase and neutral switching arrangements.
- UL 98 general-use rating of 400 A at 600 V AC.
- ON–OFF–ON (I–0–II) operation provides clear manual selection between two power sources.
- Open-transition switching disconnects the existing supply before connecting the alternative supply.
- Stable central OFF position allows both power sources to be disconnected.
- Padlockable OFF position supports controlled switching and maintenance procedures.
- Door interlocking helps restrict enclosure access in selected operating positions.
- IP65-rated black operating handle provides protection at the operator interface.
- NEMA Type 1, 3R and 12 handle suitability supports appropriately designed enclosures.
- Supplied with the required operating shaft and cable connection bolt kit.
- Suitable for optional standby power and manual generator changeover systems.
Key Features
- ABB OT400U04CP UL/CSA manual changeover switch.
- 400 A rated current.
- Four switching poles.
- UL 98 general-use rating: 400 A at 600 V AC.
- Three operating positions: I–0–II / ON–OFF–ON.
- Open-transition, break-before-make operation.
- Mechanically operated double-throw switching arrangement.
- AC-21A and AC-22A operational ratings: 400 A.
- AC-31B and AC-33B ratings: 400 A at 380–415 V AC.
- Rated insulation voltage: 1000 V.
- Rated impulse withstand voltage: 12 kV.
- Rated short-time withstand current: 15 kA for 1 s.
- Black IP65 pistol-type operating handle included.
- Operating handle model: OHB95J12E011.
- Operating shaft model: OXP12x166.
- Cable connection bolt kit: M10 × 30 mm.
- Handle padlockable in the OFF position using up to three suitable padlocks.
- Door interlock functionality in positions I and II and when padlocked.
- Manual operation without an automatic transfer controller.
- Suitable for installation in industrial switchgear and distribution assemblies.
Technical Specifications
- Manufacturer: ABB
- Series: OT Manual Changeover Switches
- Model: OT400U04CP
- Product family: OT400U
- ABB order code: OT400U04CP
- ABB product ID: 1SCA022771R2300
- Product type: UL/CSA manual changeover switch
- Rated current: 400 A
- Number of poles: 4
- Switching arrangement: Double throw
- Operating positions: ON–OFF–ON (I–0–II)
- Transition type: Open transition
- Operation: Manual
- UL 98 general-use rating: 400 A at 600 V AC
- IEC AC-21A rated operational current: 400 A
- IEC AC-22A rated operational current: 400 A
- IEC AC-23A rated operational current: 400 A
- IEC AC-31B rated operational current: 400 A at 380–415 V AC
- IEC AC-33B rated operational current: 400 A at 380–415 V AC
- Rated operational voltage, main circuit: 1000 V (IEC specification)
- Rated insulation voltage (Ui): 1000 V
- Rated impulse withstand voltage (Uimp): 12 kV
- Rated short-time withstand current (Icw): 15 kA for 1 s
- UL/CSA horsepower rating at 240 V: 125 hp
- UL/CSA horsepower rating at 480 V: 250 hp
- UL/CSA horsepower rating at 600 V: 350 hp
- Operating mechanism location: End of switch, left side
- Terminal type: Screw terminals
- Terminal tightening torque: 30–44 N·m
- Operating handle: OHB95J12E011
- Handle colour: Black
- Handle protection rating: IP65
- NEMA handle classification: Type 1, 3R and 12
- Operating shaft: OXP12x166
- Cable connection bolt kit: M10 × 30 mm
- Padlocking: OFF position, up to 3 padlocks
- Suitable padlock shackle diameter: 5–10 mm
- Door interlocking: Positions I and II and when padlocked
- Product dimensions (W × H × D): 305 × 185 × 203 mm
- Product net weight: 8.1 kg
- Applicable standards: UL 98 and IEC 60947-6-1
- Product category: Manual Changeover Switches
Reliable UL-Rated Manual Power Source Changeover
The ABB OT400U04CP provides a mechanically operated method of selecting between two electrical power sources. Its I–0–II switching mechanism allows an operator to connect the first supply, disconnect both supplies or connect the alternative supply. The open-transition arrangement ensures that one source is disconnected before the other is connected, making the switch suitable for appropriately engineered standby generator and alternative supply installations.
Designed for 400 A industrial electrical distribution, the OT400U04CP combines four-pole switching with UL/CSA ratings and a robust manual operating arrangement. Its supplied black IP65 handle, shaft and cable connection hardware simplify integration into compatible electrical enclosures. The padlockable OFF position and door interlocking functionality support controlled operation, while the NEMA open construction allows the switch to be incorporated into an enclosure selected for the required environmental conditions.
Typical Applications
- Manual mains and standby generator changeover systems.
- UL/CSA-rated industrial electrical distribution assemblies.
- Commercial building alternative power source selection.
- Three-phase and neutral power changeover installations.
- Industrial switchboards and distribution panels.
- Optional standby power systems.
- Manufacturing facility electrical distribution.
- Manual switching between independent electrical supplies.
- Generator connection and isolation arrangements.
- Industrial plant maintenance and power management systems.
- OEM switchgear and electrical distribution equipment.
- Applications requiring a 400 A four-pole open-transition changeover switch.
