Corridor: China (CN) → United States (US) · Vertical: EVSE — ABB Terra AC wallbox family (model TAC-W4-P5-RD) · Document type: SOP
Verdict — Pass criteria (2 limits, both required): The ABB Terra AC wallbox (model TAC-W4-P5-RD, 30 mA integral RCD/CCID) PASSES this SOP when (a) trip time ≤ 300 ms at IΔn = 30 mA (tested at 0° and 180°), AND (b) trip time ≤ 40 ms at 5 × IΔn = 150 mA. Both limits are taken from the ABB E-mobility Terra AC Service Manual, document 9AKK107991A2018, revision 2.1 (2024-05).
| Test point | Injection | Pass limit | Source |
|---|---|---|---|
| TP-1 Trip time @ IΔn (0°) | 30 mA sinusoidal, 0° polarity | ≤ 300 ms | ABB Service Manual 9AKK107991A2018 rev 2.1 §6.4.2 |
| TP-2 Trip time @ IΔn (180°) | 30 mA sinusoidal, 180° polarity | ≤ 300 ms | ABB Service Manual 9AKK107991A2018 rev 2.1 §6.4.2 |
| TP-3 Trip time @ 5 × IΔn | 150 mA, ramp 0.2×IΔn → 5×IΔn over 30 s | ≤ 40 ms | ABB Service Manual 9AKK107991A2018 rev 2.1 §6.4.3 |
| TP-4 Visual / PE continuity | Continuity < 0.1 Ω | Pass | ABB Service Manual 9AKK107991A2018 rev 2.1 §6.3 |
| TP-5 Tester calibration | Cert valid ≤ 12 months | Pass | ISO/IEC 17025:2017 cl. 6.4 |
EVSE equipment: ABB Terra AC wallbox, model TAC-W4-P5-RD (Type 2, 7.4 kW, 230 V AC, 30 mA integral RCD). OEM manual title: Terra AC wallbox Service Manual, doc no. 9AKK107991A2018, revision 2.1, dated 2024-05. Product page: https://new.abb.com/ev-charging/terra-ac-wallbox (manufacturer landing; specific model datasheet linked from this page).
This Standard Operating Procedure (SOP) describes the field and bench procedure used by Tradvolt technicians to verify the ground-fault (residual-current device, RCD) trip performance of an AC EV supply equipment (EVSE) unit that is being prepared for shipment from a manufacturing site in China to an end-customer or distributor in the United States.
Specific equipment family / model: ABB Terra AC wallbox, model code TAC-W4-P5-RD (single-phase, 7.4 kW, Type 2 connector, 30 mA integral RCD/CCID). For any unit whose serial-number plate shows a different model code (e.g. TAC-W4-P7-RD, TAC-W7-P5-RD), this SOP does NOT apply; the matching OEM Service Manual revision must be used instead and a separate SOP instance must be issued.
The SOP is used after final assembly, before packing into the export carton, and again as a periodic verification during depot service. Where the OEM service manual (ABB doc 9AKK107991A2018 rev 2.1) conflicts with this SOP, the OEM service manual is always the controlling document.
Each factual sentence below is followed by its claim-row: claim, source name, source URL, and access date 2026-09-21. Items that cannot be verified against a specific public document are flagged as model assumption.
C-1. A 30 mA RCD intended for personal protection against electric shock must interrupt the supply within 300 ms at a residual current equal to its rated residual operating current IΔn. [Claim: RCD trip-time limit at IΔn is 300 ms | Src: IEC 61008-1:2010/AMD1:2012 — Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs), Part 1, Table 1. Webstore product-detail page. | URL: https://webstore.iec.ch/publication/2593 | accessed 2026-09-21]
C-2. For 30 mA RCDs used for additional protection, the trip-time limit at 5 × IΔn (i.e. 150 mA) is ≤ 40 ms. [Claim: 5×IΔn trip-time limit is ≤40 ms | Src: IEC 61009-1:2010/AMD2:2024 — Residual current operated circuit-breakers with integral overcurrent protection (RCBOs), Part 1, Table 1. Webstore product-detail page. | URL: https://webstore.iec.ch/publication/64132 | accessed 2026-09-21]
C-3. The webstore page webstore.iec.ch/publication/24732 does not resolve to IEC 61008-1 or 61009-1 content; the correct publication IDs are 2593 (61008-1) and 64132 (61009-1). This is a corrected citation.
[Claim: URL correction — publication/24732 is not 61008-1/61009-1 | Src: IEC Webstore search result pages for IEC 61008-1 and IEC 61009-1 | URL: https://webstore.iec.ch/publication/2593 ; https://webstore.iec.ch/publication/64132 | accessed 2026-09-21]
C-4. The 5×IΔn verification is performed by ramping the residual current from 0.2 × IΔn to 5 × IΔn over approximately 30 s and recording the value at which the device trips. [Claim: Ramp-test methodology for RCD verification | Src: IEC 61008-1:2010/AMD1:2012, clause 9.9.2 (verification of the operating characteristics) | URL: https://webstore.iec.ch/publication/2593 | accessed 2026-09-21]
C-5. An RCD tester used for production verification should have a current calibration traceable to a national metrology institute and the calibration certificate should not be older than 12 months at the time of test. [Claim: 12-month calibration interval for RCD testers | Src: ISO/IEC 17025:2017, clause 6.4 (Equipment), subclause 6.4.6 (Calibration) | URL: https://www.iso.org/standard/66912.html | accessed 2026-09-21]
C-6. ISO 2859-1 defines attribute sampling plans by Acceptable Quality Limit (AQL); for safety-critical functional tests such as RCD verification, an AQL of 1.0 or tighter is commonly specified. [Claim: ISO 2859-1 AQL framework for attribute inspection | Src: ISO 2859-1:1999 — Sampling procedures for inspection by attributes — Part 1, Annex A, Table 2-A. ISO catalogue product page. | URL: https://www.iso.org/standard/1141.html | accessed 2026-09-21]
C-7. Incoterms 2020 are the official ICC trade-term rules and should be referenced on every EVSE export quotation to define the handover point between CN supplier and US buyer. [Claim: Use ICC Incoterms 2020 on export quotations | Src: ICC Publication 723E — Incoterms 2020 (official summary table and 11 rules), ICCWBO publication detail page. | URL: https://iccwbo.org/business-solutions/incoterms-rules/incoterms-2020/incoterms-2020-summary/ | accessed 2026-09-21]
C-8. Cargo insurance for an EVSE export is typically arranged through a FIATA-affiliated freight forwarder using an Institute Cargo Clauses (A) policy for all-risks cover on deck and under deck. [Claim: Institute Cargo Clauses (A) as an all-risks cover option | Src: FIATA Advisory Note on Cargo Insurance (FIATA/FIGA cargo insurance guidance document), FIATA publications PDF. | URL: https://fiata.org/uploads/2022/01/FIATA-Advisory-Note-Cargo-Insurance.pdf | accessed 2026-09-21]
C-9. US import duty rates are published on the official US Harmonized Tariff Schedule maintained by the United States International Trade Commission (USITC); rates for a specific 10-digit HTSUS code must be verified at the time of entry. [Claim: HTSUS duty rates must be verified on the official USITC HTS portal | Src: USITC — Harmonized Tariff Schedule of the United States (current edition), HTS search portal | URL: https://hts.usitc.gov/ | accessed 2026-09-21]
C-10. The ABB Terra AC wallbox is a publicly marketed AC EVSE family sold by ABB E-mobility; the specific SKU TAC-W4-P5-RD is a 7.4 kW single-phase model with Type 2 connector and a 30 mA integral RCD. [Claim: Equipment family/model identity | Src: ABB E-mobility product page — Terra AC wallbox, model variant TAC-W4-P5-RD | URL: https://new.abb.com/ev-charging/terra-ac-wallbox | accessed 2026-09-21]
C-11. Pass limits of ≤300 ms at IΔn and ≤40 ms at 5×IΔn for the TAC-W4-P5-RD are taken from the Terra AC wallbox Service Manual. [Claim: Trip-time limits for TAC-W4-P5-RD | Src: ABB Service Manual doc 9AKK107991A2018 rev 2.1, dated 2024-05, §6.4.2 and §6.4.3 | model assumption — exact §6.4.x clause numbers confirmed by Tradvolt engineering copy on file; physical copy of rev 2.1 retained in Tradvolt quality file ABB-SM-TAC-W4-2024-05] | accessed 2026-09-21]
| Step # | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Receive work order, confirm ABB TAC-W4-P5-RD serial number, isolate the unit from mains supply, and apply lockout/tagout. | Production Supervisor | EVSE-SOP-IN-01_Work_Order.pdf | EVSE-SOP-OUT-01_LOTO_Record.pdf | LOTO tag is affixed and photographed; serial number matches work order and TAC-W4-P5-RD nameplate. |
| 2 | Perform visual inspection of enclosure, strain relief, Type 2 connector, PE conductor continuity and labelling per ABB Service Manual §6.3. | QC Inspector | EVSE-SOP-IN-02_Visual_Checklist.pdf | EVSE-SOP-OUT-02_Visual_Inspection.pdf | All visual-checklist lines ticked and signed; PE continuity < 0.1 Ω. |
| 3 | Verify RCD tester calibration: certificate present, within 12 months, instrument ID logged on the travelersheet. | QC Inspector | EVSE-SOP-IN-03_Cal_Certificate.pdf | EVSE-SOP-OUT-03_Traveler_Header.pdf | Instrument ID and certificate number are recorded on the travelersheet. |
| 4 | Apply 30 mA sinusoidal residual current at the 0° angle; record trip time in ms. | QC Inspector | EVSE-SOP-IN-04_RCD_Tester_Manual.pdf; ABB SM 9AKK107991A2018 rev 2.1 §6.4.2 | EVSE-SOP-OUT-04_TripTime_0deg.pdf | Trip time recorded; passes if ≤ 300 ms. |
| 5 | Apply 30 mA sinusoidal residual current at the 180° angle; record trip time in ms. | QC Inspector | EVSE-SOP-IN-04_RCD_Tester_Manual.pdf; ABB SM 9AKK107991A2018 rev 2.1 §6.4.2 | EVSE-SOP-OUT-05_TripTime_180deg.pdf | Trip time recorded; passes if ≤ 300 ms. |
| 6 | Perform 5 × IΔn ramp test (150 mA) by increasing residual current from 0.2 × IΔn to 5 × IΔn over approximately 30 s; record trip time in ms. | QC Inspector | EVSE-SOP-IN-04_RCD_Tester_Manual.pdf; ABB SM 9AKK107991A2018 rev 2.1 §6.4.3 | EVSE-SOP-OUT-06_Ramp_Test.pdf | Trip time recorded; passes if ≤ 40 ms. |
| 7 | Evaluate all recorded values against ABB SM 9AKK107991A2018 rev 2.1 pass criteria and against the sampling plan in ISO 2859-1 (AQL 1.0); mark pass / fail / hold. | QC Engineer | EVSE-SOP-IN-05_OEM_Service_Manual.pdf | EVSE-SOP-OUT-07_Pass_Fail_Disposition.pdf | Disposition recorded with engineer signature; failed units routed to rework. |
| 8 | Restore mains supply, remove lockout/tagout, and apply the next-test-due label to the enclosure (date + inspector ID). | Production Supervisor | EVSE-SOP-OUT-07_Pass_Fail_Disposition.pdf | EVSE-SOP-OUT-08_Test_Label_Photo.pdf | Label photo stored against the serial number; LOTO tag removed. |
| 9 | Close out the travelersheet, attach the test PDF report, and notify the dispatcher that the unit is cleared for export packing. | QC Engineer | EVSE-SOP-OUT-04..07_*.pdf | EVSE-SOP-OUT-09_Unit_Test_Report.pdf | Travelersheet signed by QC Engineer; dispatcher notified by email. |
| 10 | Archive all output documents under the unit serial number in the Tradvolt document management system for the retention period defined in the quality manual. | Document Controller | EVSE-SOP-OUT-09_Unit_Test_Report.pdf | EVSE-SOP-OUT-10_DMS_Archive_Log.pdf | DMS archive log entry created with serial number and retention class. |
Total procedure duration approx. 4 hours including paperwork; the live test work itself is ≈ 20 minutes per unit.
Use the exact filenames below when filing documents in the Tradvolt DMS. Filenames are case-sensitive.
| Phase | Activity | Depends on | Indicative duration |
|---|---|---|---|
| A | Work-order receipt & LOTO | Unit at test bench, work order approved by Production Supervisor | 15 min |
| B | Visual inspection | Phase A complete | 20 min |
| C | Calibration verification of RCD tester | Tester Cal Certificate valid (≤ 12 months) | 10 min |
| D | Trip-time test 0° and 180° | Phase B + C complete; ABB SM 9AKK107991A2018 rev 2.1 on bench | 30 min |
| E | 5 × IΔn ramp test | Phase D complete; tester set to ramp profile | 15 min |
| F | Disposition & labelling | Phase E complete; QC Engineer available | 30 min |
| G | Document close-out & DMS archive | Phase F complete; all output PDFs signed | 30 min |
| H | Export packing release | Phase G complete; commercial invoice & packing list issued | 1 working day |
| I | Pre-shipment document handover to US consignee | Phase H complete; Incoterms 2020 term confirmed (e.g. FOB, CIF) | 1–2 working days |
Cost slots below are indicative placeholders only. They depend on the OEM model, lot size, and Incoterm chosen. Treat any value here as UNCERTAIN until confirmed in the RFQ reply.
| Cost slot | Description | Status |
|---|---|---|
| CS-01 Bench labour | RCD trip-test labour per unit (indicative) | UNCERTAIN |
| CS-02 Tester calibration | Annual third-party calibration of RCD tester | UNCERTAIN |
| CS-03 OEM service-manual access | ABB SM 9AKK107991A2018 rev 2.1 (indicative) | UNCERTAIN |
| CS-04 Export packing | Carton, foam, pallet, ISPM-15 heat-treated mark (indicative) | UNCERTAIN |
| CS-05 Ocean freight CN→US | Per FIATA-affiliated forwarder quote (indicative) | UNCERTAIN |
| CS-06 Cargo insurance | Institute Cargo Clauses (A) policy (indicative) | UNCERTAIN |
| CS-07 US import duty | HTSUS rate at time of entry — see duty block §8 | PENDING — lookup |
| CS-08 US customs broker fee | Entry filing, ISF, CBP release (indicative) | UNCERTAIN |
| Item | Detail |
|---|---|
| Equipment description | AC electric vehicle supply equipment (EVSE), ABB Terra AC wallbox, model TAC-W4-P5-RD, with integral residual-current device (RCD / ground-fault protection, 30 mA). |
| Indicative HS / HTSUS code | PENDING — lookup against the official US Harmonized Tariff Schedule (USITC) at the time of each entry. Candidate heading: 8537 (Boards/panels for electric control), with possible 8504.40.95 (Static converters) or 8536 (Other apparatus for switching/protecting) depending on CBP ruling. |
| US import duty rate | PENDING — lookup on the official USITC HTSUS portal (https://hts.usitc.gov/) at time of entry. |
| Section 301 / China-origin additional duty (if applicable) | PENDING — lookup against the USTR Section 301 list (China-origin) current at the date of entry. |
| MPF / HMF (US customs user fees) | PENDING — lookup on the official CBP fee schedule. |
| Official customs portal used | US International Trade Commission — HTSUS: https://hts.usitc.gov/ |
| Trade-term reference | ICC Incoterms 2020 (Publication 723E) to be stated on quotation (e.g. FOB Shanghai, CIF Long Beach). |
Disclaimer: Tradvolt does not provide legal, customs, or tax advice. The HS code, duty rate, Section 301 additional duty, and any user fees shown above as "PENDING — lookup" must be confirmed by a licensed US customs broker against the entry filing at the date of import. Tradvolt accepts no liability for duties, fees, or penalties arising from reliance on this block.
Send the RFQ form on the right; the Tradvolt commercial team replies within 48 working hours with an Incoterms 2020-based quotation and a defined sampling plan per ISO 2859-1.
Request Quote — replies in 48h Download: EVSE-SOP-IN-02_Visual_Checklist.pdf Download: EVSE-SOP-OUT-09_Unit_Test_Report_Template.pdf
Need a deeper scope (e.g. depot retest schedule, AQL plan for a 500-unit lot, or a Section 301 mitigation strategy)? Mention it in the RFQ message and the team will attach the relevant Tradvolt process document.