{"id":1988,"date":"2026-07-17T01:45:29","date_gmt":"2026-07-17T01:45:29","guid":{"rendered":"https:\/\/zeeyielec.com\/?p=1988"},"modified":"2026-07-17T05:37:00","modified_gmt":"2026-07-17T05:37:00","slug":"lv-bushing-inspection-checklist-factory-acceptance","status":"publish","type":"post","link":"https:\/\/zeeyielec.com\/ta\/lv-bushing-inspection-checklist-factory-acceptance\/","title":{"rendered":"\u0b86\u0bb2\u0bc8 \u0b8f\u0bb1\u0bcd\u0baa\u0bc1\u0b95\u0bcd\u0b95\u0bbe\u0ba9 LV \u0baa\u0bc1\u0bb7\u0bbf\u0b99\u0bcd \u0b86\u0baf\u0bcd\u0bb5\u0bc1 \u0b9a\u0bb0\u0bbf\u0baa\u0bbe\u0bb0\u0bcd\u0baa\u0bcd\u0baa\u0bc1\u0baa\u0bcd \u0baa\u0b9f\u0bcd\u0b9f\u0bbf\u0baf\u0bb2\u0bcd"},"content":{"rendered":"\n

This LV bushing inspection checklist for factory acceptance walks through the buyer-witnessed or supplier-executed verification steps performed on finished production units before they leave the factory \u2014 confirming that the specific batch shipping against a purchase order actually matches the ordered rating, not just the general product family. FAT typically layers on top of routine testing, adding buyer-specific checks: nameplate-to-PO conformance, visual and dimensional inspection against the approved drawing, and a subset of electrical verification tests witnessed or reviewed by the buyer or a third-party inspector before release for shipment. The same FAT discipline applies across transformer accessories<\/a> and cable accessories<\/a> product lines, though the specific checkpoints differ by component type.<\/p>\n\n\n\n

For LV bushings specifically, FAT scope is shaped by the component’s operating profile \u2014 continuous current ratings commonly spanning 600 A to 5000 A and a voltage class of 1.2 kV to 3.0 kV \u2014 because the checks that matter most at this stage are the ones that predict long-term terminal performance, not just initial dielectric integrity. A bushing can pass a one-time dielectric test and still fail in service eighteen months later from a joint that was never checked for proper seating during FAT.<\/p>\n\n\n\n

FAT is typically scheduled after production completion and before packing, giving the buyer or inspector a final opportunity to reject or request rework before goods are containerized. Projects that skip a structured FAT checklist and rely only on the supplier’s routine test report tend to see a higher rate of post-shipment disputes \u2014 not because the product was defective, but because a dimensional or documentation mismatch surfaces only at the installation site, when correction is far more expensive. The sections below work through FAT in the order it’s typically executed: documentation first, then visual and dimensional inspection, then electrical verification, then disposition.<\/p>\n\n\n\n

Pre-FAT Documentation and Nameplate Verification<\/h3>\n\n\n\n

Before any physical inspection begins, FAT starts with a paper check: confirming that the documentation package accompanying the batch matches what was actually ordered. This step catches a surprising share of mismatches early \u2014 a supplier substituting an equivalent-but-different insulation material, or a batch produced against a superseded drawing revision, rarely shows up in a visual scan but always shows up on the paperwork.<\/p>\n\n\n\n

Nameplate Data Cross-Check<\/h4>\n\n\n\n

Each bushing’s nameplate should be checked line-by-line against the purchase order and approved drawing, not just glanced at for the general product name. Key fields to verify include rated voltage class (commonly 1.2 kV or 3.0 kV for LV bushings<\/a>), continuous current rating, insulation material designation (HTN, porous resin, or porcelain), terminal configuration, and manufacture batch or lot code for traceability. A mismatch between nameplate current rating and the PO \u2014 for example, a unit stamped 2500 A shipped against an order specifying 4000 A \u2014 is a hard rejection, not a note for follow-up, since substitution at this level indicates either a picking error or an unauthorized design change.<\/p>\n\n\n\n

The same discipline carries over from MV practice: nameplate reading conventions for MV bushings follow a similar logic of cross-referencing voltage class, BIL, and batch data against procurement records, even though LV bushings carry a simpler rating set.<\/p>\n\n\n\n

Test Certificate and Traceability Review<\/h4>\n\n\n\n

Every batch should arrive with routine test certificates covering, at minimum, dielectric withstand and contact resistance results for the specific lot \u2014 not a generic type-test certificate reused across shipments. A routine test certificate with a batch number that doesn’t match the physical units in the crate is one of the more common paperwork failures caught at FAT, and it should trigger a hold until the supplier resolves the discrepancy rather than being waved through on the assumption of clerical error. Material traceability records \u2014 confirming which resin or HTN lot went into a given production run \u2014 matter most when a field failure investigation later needs to isolate whether a defect is batch-specific or systemic.<\/p>\n\n\n\n

\"LV
Documentation checklist showing nameplate fields, routine test certificate scope, and batch traceability data required before physical FAT inspection.<\/figcaption><\/figure>\n\n\n\n
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[Expert Insight]<\/strong><\/p>\n\n\n\n