| Item | Value |
|---|---|
| Equipment family (inverter) | Sungrow SG5K-D / SG6K-D (residential string, single-MPPT or dual-MPPT variants) |
| Equipment family (PV module) | LONGi LR5-54HPH-410~430M (monocrystalline PERC half-cell) |
| Equipment family (fuse) | Eaton Bussmann PV-10A10F1, 10×38 mm gPV, 1000 V DC, 10 A rating |
| OEM manual refs (procedure limits) | Sungrow SG5/6K-D Installation Manual rev. V1.3 (2023-04); Eaton Bussmann PV-10A10F1 datasheet rev. 5021 (2024) |
| Corridor | CN → EU (rail), Union Transit procedure R14 |
| Horizon | One maintenance cycle ≈ 21 working days from D0 to D21 (archive) |
| Default review interval | 12 months, or upon any inverter/PV/fuse model change |
| Evidence date | 2026-09-22 |
A DC fuse is a single-point-of-failure protective device on every PV string. Once the inverter model, string count or module replacement strategy changes, the fuse rating must be re-checked against three inputs: the fuse standard (IEC 60269-6 for gPV or UL 248-19 for US-bound sub-populations)[1][2], the fuse manufacturer's certified I²t let-through value, and the PV source/array de-rating per IEC 62548[4a]. For the named equipment family above, the Sungrow SG5/6K-D installation manual rev. V1.3 specifies maximum array Isc per MPPT and limits the number of parallel strings[6], and the Bussmann PV-10A10F1 datasheet rev. 5021 gives pre-arc and total clearing I²t values used in Step 3[8]. On the R14 corridor the documentation must be reproducible because goods may be inspected by competent authorities at the office of departure, in transit, and at the office of destination under the Union Customs Code[3].
Owner is singular per row — collaboration is noted under "Done-when".
| Step# | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Scope audit of DC fuse inventory: list every Bussmann PV-10A10F1 base, holder and replacement cartridge installed on the corridor-bound lots | Asset O&M engineer | Installed-asset register (CSV) | audit-scope-R14-v01.xlsx | All fuse ratings and quantities reconciled against Sungrow SG5/6K-D datasheet and one-line diagram |
| 2 | Confirm applicable fuse standard — IEC 60269-6 (gPV) for the CN→EU lane, UL 248-19 for any US-bound sub-population[1][2] | Compliance officer | Audit scope (Step 1) | standard-applicability-note.md | Standard id recorded and cross-checked with Sungrow SG5/6K-D Installation Manual rev. V1.3[6] |
| 3 | Recalculate fuse let-through I²t against LONGi LR5-54HPH Isc · safety factor per IEC 62548 (with NEC 690.8 where dual-listed)[4a] | PV design engineer | LONGi LR5-54HPH datasheet, Sungrow SG5/6K-D datasheet, Bussmann PV-10A10F1 datasheet rev. 5021[8] | fuse-rating-calc-R14-v01.pdf | Calculated rating ≥ Isc × SF and ≤ Bussmann pre-arc I²t |
| 4 | Compile bilingual (EN / 中文) technical file for the lot, including CE marking, DoC, test reports | Trade documentation specialist | Calc pack (Step 3), cert pack (Step 6 input) | tech-file-R14-v01.pdf | File paginated, indexed, and signed off by both engineer + compliance |
| 5 | HS classification + binding tariff information (BTI) request where the lot is novel | Customs broker | Commercial invoice, tech file | hs-classification-R14.pdf | HS code confirmed and — if requested — BTI ruling referenced by EORI |
| 6 | Cert verification on issuing body's live online register (TÜV, VDE, UL, CSA — depends on marking) | Compliance officer | Cert pack from manufacturer | cert-verification-screenshots.zip | Every cert number resolves to a valid record and screenshot retained with date |
| 7 | Lodge R14 transit declaration via NCTS, attaching the technical file as supporting document[3] | Customs broker | Tech file, HS classification, invoice | MRN-number-R14.txt | Movement Reference Number (MRN) issued and movement released at office of departure |
| 8 | Warehouse receipt spot-check: count, visual rating, marking, packaging condition vs. technical file | Warehouse QA | Tech file, packing list | receipt-spotcheck-R14.pdf | Delta report shows 0 critical defects and is countersigned by broker |
| 9 | Archive dossier + schedule next periodic review (default 12 months[9] or upon any inverter/PV/fuse model change) | Document controller | All prior step outputs | archive-index-R14.csv | Folder locked read-only and next-review date appears on calendar |
audit-scope-R14-v01.xlsxstandard-applicability-note.mdfuse-rating-calc-R14-v01.pdftech-file-R14-v01.pdfhs-classification-R14.pdfcert-verification-screenshots.zipMRN-number-R14.txtreceipt-spotcheck-R14.pdfarchive-index-R14.csvoem-datasheet-pack.pdf (Sungrow SG5/6K-D Installation Manual rev. V1.3 + LONGi LR5-54HPH datasheet + Eaton Bussmann PV-10A10F1 datasheet rev. 5021)DoC-CE-fuse-lot.pdf (Declaration of Conformity, EU Regulation 2014/35/EU where claimed)| Phase | Activity | Owner | Indicative duration |
|---|---|---|---|
| D 0–2 | Audit + standard selection (Steps 1–2) | Asset O&M + Compliance | 2 working days |
| D 3–5 | Calculation + cert verification (Steps 3, 6) | Design engineer + Compliance | 3 working days |
| D 6–9 | Tech file + HS classification (Steps 4–5) | Trade doc + Broker | 4 working days |
| D 10 | R14 lodging (Step 7) | Customs broker | 1 working day |
| D 11–18 | Rail transit CN→EU (variable by lane)[10] | Carrier + broker | ~8 calendar days |
| D 19–20 | Warehouse receipt + spot-check (Step 8) | Warehouse QA | 2 working days |
| D 21 | Archive + schedule next review (Step 9) | Document controller | 1 working day |
Total cycle D0 → D21 = 21 working days end-to-end; this is the figure used in the JSON-LD totalTime: "P21D" field above[5]. The ~8 calendar days for the CN→EU rail transit itself (D11–D18) is the corridor component only and excludes the 13 working days of pre-lodgement and post-receipt steps.
⚠ The figures below are INDICATIVE slots for budgeting only. Values marked UNCERTAIN are model assumptions with no sourced rate in this maintenance pack; obtain current figures from your licensed customs broker or the European Commission's TARIC consultation page[4b] before any commercial commitment.
| Cost line | Unit | Indicative slot (EUR) | Status |
|---|---|---|---|
| Engineering re-calculation pack (Step 3) | per lot | Slot 450–900 | indicative |
| Bilingual technical file (Step 4) | per lot | Slot 300–650 | indicative |
| BTI ruling request (Step 5, optional) | per ruling | Slot 0 (free via EU trader portal) – see source | UNCERTAIN |
| Customs broker fee — R14 lodging | per MRN | Slot 80–180 | indicative |
| Cert register verification labour (Step 6) | per cert | Slot 15–40 | indicative |
| Warehouse QA spot-check (Step 8) | per pallet | Slot 20–55 | indicative |
| Duty rate (EU import) on the lot | ad valorem | PENDING — see HS block | UNCERTAIN |
All EUR slot values in the table (450–900, 300–650, 80–180, 15–40, 20–55) are model assumptions pending broker quotation; no public tariff or fee schedule is cited for these figures. The BTI ruling row is also a model assumption — confirm any fee against the live EU trader portal entry before commitment.
| Field | Value |
|---|---|
| Likely HS heading (PV fuses, dedicated) | 8536 — "Apparatus for switching, protecting, connecting or controlling electrical circuits" |
| EU duty rate — third-country duty (CN origin) | PENDING — consult TARIC live lookup for the exact 10-digit CN code and any preferential treatment under the EU-China rail context[4b] |
| Preferential rate candidate | PENDING — depends on origin proof (Form A / REX under EU GSP, where applicable) |
| VAT | Member-state rate applies (typically 19–25%); verify with importer of record |
Lookup steps: (a) Open the European Commission TARIC consultation page[4b]; (b) enter the 10-digit TARIC code derived from heading 8536 for the fuse family; (c) capture a screenshot of the duty and measures column with the consultation date. Disclaimer: TradVolt is not a customs authority. The figures, codes and preferences above are placeholders pending verification by a licensed broker and the live TARIC service.
| # | Claim | Specific source URL | Used at |
|---|---|---|---|
| [1] | IEC 60269-6 covers gPV fuse-links for PV applications | https://webstore.iec.ch/en/publication/25212 (IEC 60269-6:2010/AMD1:2023 CSV consolidated edition, Low-voltage fuses — Part 6: Supplementary requirements for fuse-links for the protection of solar photovoltaic energy systems) | Why / Step 2 / FAQ #3 |
| [2] | UL 248-19 covers low-voltage fuses for PV in the US | https://www.shopulstandards.com/ProductDetail.aspx?productId=UL248-19 (UL 248-19, Standard for Low-Voltage Fuses — Part 19: Photovoltaic Fuses) | Why / Step 2 / FAQ #3 |
| [3] | R14 is a Union Transit procedure; R14 movements may be inspected at office of departure, in transit, and at office of destination | https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32013R0952 (Regulation (EU) No 952/2013 — Union Customs Code, Article 226 et seq. and Articles 214, 215 on Union Transit) | Why / Step 7 / FAQ #1, #6 |
| [4a] | Fuse let-through I²t must be evaluated against Isc and array de-rating factors | https://webstore.iec.ch/en/publication/6792 (IEC 62548:2023, Photovoltaic (PV) arrays — Design requirements) | Why / Step 3 |
| [4b] | EU import duty and measures are consulted via the TARIC consultation tool | https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en (European Commission DG TAXUD TARIC consultation) | Cost table / HS block |
| [5] | Total maintenance cycle ≈ 21 working days D0→D21 (figure used in JSON-LD totalTime "P21D") | TradVolt internal timeline model — assumption based on aggregated D0–D21 working-day sum in the Timeline table above; no external source cites the figure as a single number | Verdict / Timeline |
| [6] | Sungrow SG5K-D / SG6K-D residential string inverter OEM datasheet and installation manual rev. V1.3 (2023-04) | https://www.sungrowpower.com/en (Sungrow product landing — specific datasheet/manual rev to be confirmed at RFQ; landing page renders datasheet PDFs dynamically) | Equipment table / Step 1–3 |
| [7] | LONGi LR5-54HPH-410~430M monocrystalline PERC half-cell PV module | https://www.longi.com/en/ (LONGi product landing — specific Hi-MO 5/HPH datasheet PDF to be confirmed at RFQ) | Equipment table / Step 3 |
| [8] | Eaton Bussmann PV-10A10F1, 10×38 mm gPV fuse-link, 1000 V DC, 10 A rating; pre-arc and total clearing I²t per datasheet rev. 5021 (2024) | https://www.eaton.com/content/dam/eaton/products/electrical-circuit-protection/fuses/bussmann-series-photovoltaic-fuses/PV-10A10F1-Datasheet.pdf (Eaton Bussmann PV-10A10F1 datasheet; if blocked at bot wall, request via Eaton Bussmann datasheet request portal at https://www.eaton.com — model assumption: datasheet rev. 5021 cited here is the rev TradVolt standardises against; verify exact rev at order) | Equipment table / Step 3 |
| [9] | Default 12-month periodic review interval for the maintenance dossier | https://www.iso.org/standard/62085.html (ISO 9001:2015 §7.5 — Documented information; TradVolt model assumption is to set the periodic-review cadence at 12 months, which must be approved by your quality manager) | Step 9 / FAQ #4 |
| [10] | ~8 calendar days for CN→EU rail transit (D11–D18 window) | TradVolt corridor model assumption based on 2024–2025 lane averages for Chongqing/Xinjiang → Duisburg/Małaszewicze; no single public source quotes this figure; confirm with your carrier on each shipment | Timeline |