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OT250E12C ABB 250 A 3-Pole Manual Change-over Switch
ABB OT250E12C is a 250 A 3-pole I-O-II manual change-over switch with its operating mechanism positioned between the poles and supplied without a handle and shaft for flexible switchboard integration.
£841.41
Why Choose the ABB OT250E12C Manual Change-over Switch?
The ABB OT250E12C is a robust 250 A 3-pole manual change-over switch designed for dependable transfer between two electrical power sources. Supplied under ABB product ID 1SCA022776R9410 and forming part of the ABB OT Change-over Switches range, it provides I-O-II manual switching for demanding industrial and commercial low-voltage power distribution applications.
The OT250E12C features its operating mechanism in the middle / between the poles, providing a different physical arrangement from versions with the mechanism positioned at the end of the switch. It is designed for front operation and provides open-transition, break-before-make switching, ensuring the active source is disconnected before the alternative source is selected.
With a rated current of 250 A and a 3-pole configuration, the OT250E12C is designed for three-phase source-transfer applications. It provides 250 A AC-21 and AC-23 performance at 400 V, with an AC-23 operational power rating of 140 kW. This version is supplied without a handle and operating shaft, allowing compatible ABB operating accessories to be selected separately.
Key Advantages
- Heavy-duty 250 A manual change-over switch for industrial power distribution.
- 3-pole configuration designed for three-phase electrical systems.
- I-O-II open-transition operation for break-before-make source transfer.
- Operating mechanism positioned in the middle / between the poles for flexible switchboard layouts.
- 250 A AC-23 rating at 400 V with 140 kW operational power.
- Supplied without handle and shaft, allowing the operating arrangement to be configured using compatible ABB accessories.
Key Features
- ABB OT Change-over Switches series.
- 250 A rated current.
- 3-pole manual change-over configuration.
- I-O-II switching sequence.
- Open-transition / break-before-make source switching.
- 1000 V maximum rated operational voltage.
- 8 kA rated short-time withstand current.
- Front-operated construction with handle and shaft ordered separately.
Reliable Three-pole Manual Power Source Change-over
Manual change-over switches provide a controlled method of transferring electrical loads between alternative power sources. The ABB OT250E12C uses I-O-II open-transition operation, providing a defined OFF position and ensuring the existing source connection is broken before the alternative source connection is made.
The three-pole configuration is designed for three-phase systems, while the mechanism positioned in the middle of the switch provides a practical alternative layout for switchboard integration. Because the OT250E12C is supplied without a handle and shaft, compatible ABB operating accessories can be selected separately to suit the enclosure depth and operating requirements of the installation.
Typical Applications
- Three-phase mains-to-generator manual change-over systems.
- Industrial electrical distribution switchboards.
- Alternative and backup power source selection.
- Commercial power distribution panels.
- Industrial machinery and power distribution systems.
- OEM switchboards requiring a mechanism-between-poles arrangement.
Technical Specifications
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| Operation | Manual | |
|---|---|---|
| Device Type | Manual changeover switch | |
| Series | OT Change-over Switches | |
| ABB product ID | 1SCA022776R9410 | |
| ABB order code | OT250E12C | |
| Product type | Manual change-over switch | |
| Rated current | 250 A | |
| Number of poles | 3 | |
| Switch positions | I-O-II | |
| Transition type | Open transition / break-before-make | |
| AC-21 rated current at 400 V | 250 A | |
| AC-23 rated current at 400 V | 250 A | |
| AC-23 operational power at 400 V | 140 kW | |
| Maximum rated operational voltage | 1000 V AC | |
| Rated short-time withstand current | 8 kA | |
| Operation | Manual front operation | |
| Operating mechanism | Middle / between the poles | |
| Main terminal connection | Screw connection | |
| Front degree of protection | IP20 | |
| Operating handle | Not included | |
| Operating shaft | Not included | |
| Dimensions (W × H × D) | 237 × 150 × 160 mm | |
| EAN | 6417019270494 |
Frequently Asked Questions
What is the ABB OT250E12C used for?
The ABB OT250E12C is a 250 A 3-pole manual change-over switch designed for controlled transfer between alternative three-phase electrical power sources.
What is the rated current of the ABB OT250E12C?
The OT250E12C has a rated current of 250 A, including a 250 A AC-23 rating at 400 V with an operational power rating of 140 kW.
How many poles does the OT250E12C have?
The ABB OT250E12C is a 3-pole change-over switch designed for three-phase electrical source-transfer applications.
Where is the operating mechanism on the ABB OT250E12C?
The OT250E12C has its operating mechanism positioned in the middle / between the poles, distinguishing it from OT change-over switch configurations with the mechanism positioned at the end of the switch.
Does the ABB OT250E12C include a handle and operating shaft?
No. The OT250E12C is supplied without a handle and operating shaft, allowing compatible ABB operating accessories to be selected separately to suit the installation.
Trusted ABB Change-over Switching
ABB OT manual change-over switches provide dependable source-transfer switching for industrial and commercial electrical distribution systems, with the OT250E12C combining 250 A capacity, three-pole switching and a mechanism-between-poles configuration for flexible switchboard integration.
