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OTZW25 ABB Change-Over Switch Mechanism for OT160EV–250 or OS32G–250
ABB OTZW25 is a mechanical change-over mechanism for compatible OT160EV–250 or OS32G–250 applications, connecting two 3-pole or 4-pole switches for coordinated I-O-II operation.
£215.77
Why Choose the ABB OTZW25 Change-Over Switch Mechanism?
The ABB OTZW25 is a purpose-designed change-over switch mechanism for compatible ABB switch-disconnectors. Part of the ABB OT/OETL accessory range, it is specified for OT160EV–250 or OS32G–250 applications and enables two compatible switches to operate together as a coordinated change-over assembly.
The OTZW25 mechanically connects two 3-pole or 4-pole switches and provides coordinated I-O-II operation. This allows one operating mechanism to select between two switching positions with a central OFF position, making the accessory suitable for manual source-selection and power-transfer arrangements.
For applicable ABB OT configurations, the mechanism supports an adjustable shaft distance of 210 + (0…18) × 20 mm. The OTZW25 has approximate dimensions of 80 × 250 × 100 mm (W × H × D), and ABB catalogue data specifies a conversion-kit weight of approximately 2.8 kg.
Key Advantages
- Purpose-designed change-over mechanism for ABB OT160EV–250 or OS32G–250 applications.
- Mechanically coordinates two compatible switches.
- Provides clear I-O-II change-over operation.
- Suitable for assemblies using two 3-pole or two 4-pole switches.
- Adjustable shaft-spacing arrangement supports flexible panel construction.
- Genuine ABB accessory engineered for coordinated change-over switching assemblies.
Key Features
- ABB OTZW25 change-over switch mechanism.
- Part of the ABB OT/OETL accessory range.
- Specified for OT160EV–250 or OS32G–250.
- Connects two 3-pole or 4-pole switches.
- Provides I-O-II operating positions.
- Applicable OT shaft spacing: 210 + (0…18) × 20 mm.
- Conversion kit includes shafts for the coordinated switch arrangement.
- Designed for manual change-over and source-selection applications.
Coordinated I-O-II Change-Over Operation
The ABB OTZW25 converts two compatible switch-disconnectors into a mechanically coordinated change-over arrangement. The mechanism operates the pair through I-O-II positions, allowing one switch position, a central OFF position and the alternative switch position to be selected through the common change-over mechanism.
Using two standard 3-pole or 4-pole switches provides flexibility when constructing source-selection and transfer assemblies. The adjustable shaft-distance arrangement also supports different panel layouts, making the OTZW25 suitable for switchboards and distribution systems requiring a manufacturer-matched mechanical change-over solution.
Typical Applications
- ABB OT160EV–250 change-over switch assemblies.
- ABB OS32G–250 compatible change-over arrangements.
- Manual source-selection systems.
- Industrial power-transfer panels.
- Three-pole and four-pole change-over assemblies.
- Switchboards requiring coordinated I-O-II mechanical operation.
Technical Specifications
| Series | OTZW / OT/OETL Accessories |
|---|---|
| ABB order code | 1SCA022778R6920 |
| Product type | Change-over switch mechanism |
| Specified application | OT160EV–250 or OS32G–250 |
| Number of interconnected switches | 2 |
| Supported switch configurations | 3-pole or 4-pole |
| Operating positions | I-O-II |
| Applicable OT shaft distance | 210 + (0…18) × 20 mm |
| Width | approx. 80 mm |
| Height | approx. 250 mm |
| Depth | approx. 100 mm |
| Catalogue conversion-kit weight | approx. 2.8 kg |
| Minimum order quantity | 1 piece |
Frequently Asked Questions
What is the ABB OTZW25?
The ABB OTZW25 is a change-over switch mechanism specified for compatible OT160EV–250 or OS32G–250 switching applications.
How many switches does the OTZW25 connect?
The OTZW25 mechanically connects two compatible switches to create a coordinated change-over switching assembly.
Can the ABB OTZW25 be used with 3-pole and 4-pole switches?
Yes. The change-over mechanism is designed for arrangements using two 3-pole or two 4-pole switches.
What operating positions does the OTZW25 provide?
The ABB OTZW25 provides coordinated I-O-II operation, giving two switching positions separated by a central OFF position.
What shaft spacing does the OTZW25 support?
For applicable ABB OT configurations, the OTZW25 supports an adjustable shaft distance of 210 + (0…18) × 20 mm.
What are the approximate dimensions of the ABB OTZW25?
The OTZW25 measures approximately 80 × 250 × 100 mm (W × H × D), with ABB catalogue data specifying an approximate conversion-kit weight of 2.8 kg.
Trusted ABB Accessories for Change-Over Switching
ABB OT/OETL switching accessories are engineered for coordinated integration with compatible ABB equipment, helping panel builders, machinery manufacturers and electrical engineers configure dependable source-selection, isolation and change-over switching assemblies.
