OS250D03: OS-type switch-fuse application and replacement review
OS250D03 is a OS-type switch-fuse. The technical data below separates documented family characteristics from ordering-code options that need verification on the actual unit.
Technical facts to verify
| Technical item | Verified value / selection note |
|---|---|
| Complete designation | OS250D03 |
| Type | OS250D03 |
| Nominal current | 250 A |
| Family | IEC OS-type switch fuse |
| Example ABB kit | 80 kA, 1000 V assembly in ACS880 hardware manual; kit-specific |
The data for OS250D03 supports initial identification. For a purchase decision, use the actual nameplate and the manufacturer's documentation for the complete installed configuration.
Where this designation fits
For OS250D03, Define isolation duty and fuse coordination at the actual voltage and fault level. A switch-fuse assembly requires the correct fuse links and operating hardware.
Record the operating duty, supply and field interfaces of OS250D03. A same-family designation may still have a different electrical rating, connection, firmware or approval.
Related designations in the same product line
The following codes have a same-line relationship to OS250D03. Their ratings and options can differ; they are references for an enquiry, not approved substitutes.
No additional exact same-line designation is shown here for OS250D03. Do not assume a different product family is interchangeable.
Configuration gate before ordering
For OS250D03, Check poles, fuse size, handle, shaft, auxiliary contact and installation kit against the panel drawing. A drive-manual kit rating should not be transferred to an unverified standalone assembly.
The RFQ for OS250D03 should include the full designation, quantity, clear nameplate photo, revision, drawings and required delivery date. Request explicit confirmation of every proposed alternative.
Site acceptance and maintenance
For OS250D03, With feeder isolated, verify mechanical indication, door interlock if fitted, fuse continuity and contact feedback before returning the cabinet to service.
File the test record under OS250D03 and keep the as-left wiring, settings and firmware with the asset history. Site safety procedures and the exact manufacturer's instructions govern the work.
Procurement handover
Use OS250D03 consistently in the quotation, purchase order and maintenance record. Ask the supplier to state whether the offered item is the exact designation or a documented successor.
Before energizing OS250D03, compare the supplied labels, accessories and approvals with the approved engineering documents. Retain the inspection and acceptance results for future service.
