Air circuit breakers are configurable devices used in main low-voltage distribution. Replacement and new-project enquiries should identify the complete breaker configuration rather than only the frame or current.
Information required for an ACB enquiry
The more configuration information supplied at enquiry stage, the more accurately the required breaker and accessories can be identified.
- Frame and rated current
- Number of poles
- Breaking performance
- Fixed or drawout execution
- Trip-unit reference
- Control voltage
- Closing, shunt-trip and undervoltage accessories
- Communication or indication requirements
MasterPact replacement projects
For an existing ACB, provide photographs of the front label, trip unit, cradle where applicable and accessory labels. Older NT/NW installations may require a careful replacement review rather than a reference-only assumption.
Project and panel-builder enquiries
For new projects, send the approved single-line diagram, breaker schedule or BOQ information available to you. Final breaker selection should follow the project's protection study and approved design.
Frequently asked questions
Is the ACB frame size enough to identify a replacement?
No. Pole configuration, breaking performance, trip unit, execution and accessories can all change the required reference.
What photographs are useful for an existing ACB?
Front nameplate, trip unit, accessory labels and cradle details are particularly useful.
Can Al Qarar help with older Schneider ACB references?
Send the complete old reference and photographs. The team can review the enquiry and confirm the commercially offered solution.
Have a Schneider Electric part number or BOQ?
Send the complete references, quantities and delivery requirement to Al Qarar Technical Supplies in Oman.
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