{"id":4487,"date":"2026-09-08T13:08:59","date_gmt":"2026-09-08T05:08:59","guid":{"rendered":"https:\/\/cnkuangya.com\/?p=4487"},"modified":"2026-09-21T13:51:29","modified_gmt":"2026-09-21T05:51:29","slug":"dc-circuit-breaker-sample-approval-checklist","status":"publish","type":"post","link":"https:\/\/cnkuangya.com\/de\/blog\/dc-circuit-breaker-sample-approval-checklist\/","title":{"rendered":"DC Circuit Breaker Sample Approval Checklist"},"content":{"rendered":"

DC circuit breaker sample approval starts by confirming that its exact model, documentation, installation details and evaluation results all describe the same configuration. Then record that configuration as the reference for production orders.<\/p>\n

A sample that fits a panel is only a starting point. OEM buyers, distributors and panel builders also need evidence that the offered device suits the intended application and that future deliveries can be checked against a documented specification.<\/p>\n

\"KUANGYA
KUANGYA KYB1Z-63H DC circuit breaker. Confirm the exact sample model and configuration against its current documentation.<\/figcaption><\/figure>\n

1. Define the application before requesting samples<\/h2>\n

Send the supplier a short application brief. Include the maximum DC circuit voltage, operating-current requirements, installation environment, available panel space and the protective-device requirements established by your engineering team. State whether the device is intended for a PV circuit, battery circuit or another DC application.<\/p>\n

Record the required pole arrangement, connection diagram, current direction and auxiliary accessories. Ask the supplier to identify the exact configuration offered, including model suffixes. Do not accept a general product-family brochure as the complete sample specification.<\/p>\n

For a starting point when comparing available configurations, browse the Kuangya DC MCB product range<\/a>. Final selection should follow the exact model documentation and project requirements.<\/p>\n

2. Build one document pack for each sample configuration<\/h2>\n

Assign every sample a reference number and keep its documents together. A simple spreadsheet can link the sample reference to the supplier model, drawing revision, evaluation record and approval decision.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Item to request<\/th>\nWhat the buyer should record<\/th>\n<\/tr>\n<\/thead>\n
Current datasheet<\/td>\nExact model, ratings, revision and date<\/td>\n<\/tr>\n
Installation instructions<\/td>\nConnection arrangement, polarity requirements, terminal data and mounting instructions<\/td>\n<\/tr>\n
Dimension drawing<\/td>\nOverall size, mounting details and access space<\/td>\n<\/tr>\n
Certification evidence<\/td>\nIssuer, reference number, covered model and rating scope<\/td>\n<\/tr>\n
Relevant test evidence<\/td>\nSample identity, configuration, test conditions, results and report reference<\/td>\n<\/tr>\n
Marking and packaging artwork<\/td>\nModel identification, batch identification and artwork revision<\/td>\n<\/tr>\n
Quotation<\/td>\nThe same model and accessories as the sample, with exclusions stated<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

If two documents disagree, request a corrected and consistent pack before approval. Avoid assuming that a value for another model also applies to the sample.<\/p>\n

3. Verify certification claims against the offered model<\/h2>\n

When a supplier claims UL certification, use the official UL Product iQ information page<\/a> to locate the verification service. Compare the resulting record with the supplier identity and the offered product configuration.<\/p>\n

For other claimed certifications, ask for the issuing body’s verification route. A logo on a catalogue or a link to a standard’s description does not establish that the supplied model is covered. If the record is unclear, ask the issuer or supplier to resolve the discrepancy.<\/p>\n

Keep a dated record of what was checked. Where private-label branding is involved, ask how the proposed brand and model identification relate to the supporting documentation before approving artwork.<\/p>\n

4. Separate receiving inspection from electrical qualification<\/h2>\n

Receiving inspection can identify the wrong model, damaged packaging, missing accessories or inconsistent markings. Compare the sample with the approved drawing and document pack, and photograph the relevant identification details.<\/p>\n

Electrical qualification is a separate engineering activity. Your qualified engineering team or testing laboratory should define the required tests, conditions and acceptance limits using the applicable product requirements and manufacturer instructions. Record which evidence comes from supplier reports and which checks were performed independently.<\/p>\n

Do not use improvised short-circuit or high-voltage tests to qualify a sample. A basic mechanical check does not establish interrupting capacity or suitability for the intended DC circuit.<\/p>\n

For project selection questions, also see the DC circuit breaker sizing guide<\/a>.<\/p>\n

5. Use a clear approval record<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Review area<\/th>\nEvidence to retain<\/th>\nReason to hold approval<\/th>\n<\/tr>\n<\/thead>\n
Product identity<\/td>\nModel, suffixes, sample reference and photographs<\/td>\nSample and quotation describe different configurations<\/td>\n<\/tr>\n
Dokumentation<\/td>\nDated datasheet, drawing and instructions<\/td>\nMissing or contradictory specifications<\/td>\n<\/tr>\n
Installation fit<\/td>\nFit-check record against the intended panel design<\/td>\nMounting, access or connection details remain unresolved<\/td>\n<\/tr>\n
Electrical qualification<\/td>\nEngineering review and required test reports<\/td>\nRequired evidence is missing or fails agreed criteria<\/td>\n<\/tr>\n
Claimed certification<\/td>\nVerification record for the offered scope<\/td>\nModel or rating coverage cannot be confirmed<\/td>\n<\/tr>\n
Production consistency<\/td>\nApproved reference documents and change process<\/td>\nSupplier has not confirmed the production reference<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Use explicit outcomes such as approved for the stated configuration<\/strong>, on hold pending listed evidence<\/strong>, oder rejected with reasons<\/strong>. Name the reviewer and date the decision.<\/p>\n

6. Connect sample approval to the production order<\/h2>\n

Retain a reference sample where practical, together with its approved documents. Specify the model, accessories and document revisions in the purchase order or agreed technical attachment.<\/p>\n

Ask the supplier to notify you before proposed changes to the approved configuration, relevant materials, markings or manufacturing arrangements. Define who reviews those changes and when a replacement sample or additional evidence is needed.<\/p>\n

Agree on how delivery batches will be identified and which records will accompany them. Set the incoming inspection and sampling plan with your quality team; one accepted sample does not demonstrate the quality of every future unit.<\/p>\n

7. Copy this sample request template<\/h2>\n
Subject: DC circuit breaker sample request for OEM evaluation\n\nApplication and destination country:\nMaximum DC circuit voltage:\nOperating-current requirements:\nEngineering-specified protection requirements:\nRequired pole and connection arrangement:\nCurrent-direction requirements:\nInstallation environment and available space:\nRequired accessories and certification:\nSample quantity and estimated production quantity:\nTarget evaluation and delivery dates:\nBranding and packaging requirements:\n\nPlease identify the exact offered model and provide the current datasheet, dimension drawing, installation instructions, certification evidence, available relevant test reports, sample cost, lead time, production quotation, batch identification and change-notification process.<\/code><\/pre>\n
Interactive Sample Approval Worksheet<\/h2>\n
Select a result and enter evidence for each check. Answers are temporary: this worksheet does not submit or permanently save them. Copy your notes before leaving. Any unresolved applicable requirement keeps approval on hold; final approval requires an authorized reviewer.<\/p>\n
\n
\n1*. The exact model and suffix match the quotation, sample label and datasheet.<\/legend>\n