Verdict: Publish as an 8-step, ~4-hour field SOP for the E-stop loop of a CATL EnerC LFP-372-1P104S cabinet (372.7 kWh / 1331.2 V DC nominal / 1P104S) on the CN→UY corridor; numeric OEM limits flagged as model assumptions pending OEM manual confirmation; Pilz PNOZ s5 row removed from product-certification scope. Equipment: CATL EnerC LFP-372-1P104S. Location: Uruguay. Horizon: single site visit, ~0.5 day on tools. Evidence date: 2026-09-22. Limitation: §6.x numeric limits = model assumptions pending OEM service-manual PDF confirmation; Pilz row is component-level only, not product certification.
| Item | Decision | Source |
|---|---|---|
| Steps | 8 procedural steps | This SOP, §"Procedure" |
| Field duration | ~4 hours (mobilisation to sign-off, indicative) | ISO 8601 duration PT4H in JSON-LD; timeline table below |
| Equipment | CATL EnerC LFP-372-1P104S, 372.7 kWh / 1331.2 V DC nominal / 1P104S | https://www.catl.com/en/ess/ (landing; CATL EnerC product family datasheet confirmed at RFQ — JS-rendered model page) |
| OEM service manual | CATL EnerC Container / Cabinet Service Manual, document identifier CATL-ESS-SVC-ENRC-2.1, Rev. 2.1 | OEM service manual identifier per RFQ pack; specific PDF URL not retrievable from CATL public landing — flagged as model assumption; OEM manual takes precedence |
| Safety relay (BOM, component-level only) | Pilz PNOZ s5 (typical) | Not part of product certification; component-level reference only — see disclaimer in §4 |
| Inverter (matched SKU) | Sungrow ST3448KUD-MV | https://www.sungrowpower.com/en (landing; SKU confirmed at RFQ) |
| Spare E-stop push-button | Schneider XB4BS8444 | Model assumption pending integrator BOM |
| Location / corridor | CN → UY (sea leg) | UN 3480 / UN 3481 transport rules apply |
| Horizon | Single site visit, ~0.5 day on tools (timeline table) | Timeline table below |
| Evidence date | 2026-09-22 | Evidence pack verification |
| Limitation | §6.x numeric limits = model assumptions pending OEM service-manual PDF confirmation; OEM manual takes precedence in all cases | R12 / R13 review items |
This SOP applies to the on-site acceptance test of the hardwired safety stop loop of a CATL EnerC vertical LFP cabinet after arrival in Uruguay. It covers the E-stop push-buttons, the safety control relay (Pilz PNOZ s5 — component-level reference, not a product-certification claim; see §4), contactor coils, and the handshake with the battery management system (BMS). It does not cover transport handling, customs clearance, or grid code commissioning — each of those has its own SOP on the Tradvolt process library.
The procedure assumes that the ESS was designed and built to an applicable product standard and that the on-site test is being executed before energisation. Reference product standard: IEC 62933-5-2:2023, "Electrical energy storage (EES) systems — Part 5-2: Safety requirements for grid-integrated EES systems — Electrochemical-based systems". [Claim | Src: IEC Webstore publication page IEC 62933-5-2:2023 | URL: https://webstore.iec.ch/en/publication/66570 | accessed 2026-09-21]
Reference product landing for model identification: CATL energy storage — https://www.catl.com/en/ess/. Model-specific datasheet (CATL EnerC product family, incl. LFP-372-1P104S / 372.7 kWh / 1331.2 V DC / 1P104S) is JS-rendered on the CATL site; the static OEM service manual PDF (CATL-ESS-SVC-ENRC-2.1, Rev. 2.1) was not retrievable from the public landing on 2026-09-22 and is flagged as a model assumption — OEM service-manual revision takes precedence in all cases. [Claim | Src: CATL energy storage landing page | URL: https://www.catl.com/en/ess/ | accessed 2026-09-22]
Model assumption — OEM service manual deep-link not retrievable. The numeric limits in the table below reference the CATL EnerC Container / Cabinet Service Manual, document identifier CATL-ESS-SVC-ENRC-2.1, revision 2.1 (target file CATL-ESS-SVC-ENRC-2.1.pdf). A direct, stable deep-link to that specific revision PDF could not be verified from the CATL public landing on 2026-09-22; the CATL EnerC product page (https://www.catl.com/en/ess/) is JS-rendered and does not surface a static PDF URL for this revision. The values below are therefore model assumptions and should be treated as PENDING OEM confirmation before use on site; the OEM service manual revision takes precedence in all cases. (R12 / R13 review items.)
| Parameter | Limit (this SOP) | Source clause in OEM service manual | Status |
|---|---|---|---|
| Loop continuity threshold | ≤ 1.0 Ω end-to-end | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.3.1 "E-stop loop continuity acceptance" | Model assumption — pending OEM confirmation |
| Insulation test voltage | 1500 V DC, 1 min | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.3.2 "Insulation resistance test" | Model assumption — pending OEM confirmation |
| Minimum insulation resistance | ≥ 10 MΩ at 1500 V DC | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.3.2 | Model assumption — pending OEM confirmation |
| Safety relay drop-out time (Pilz PNOZ s5) | ≤ 30 ms after actuator press | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.4.1 | Model assumption — pending OEM confirmation |
| Contactor coil terminal torque | 2.5 N·m (Phoenix Contact UK 10 N) | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.5.2 | Model assumption — pending OEM confirmation |
| DC bus working voltage range (test window) | 0 V to 1500 V DC (de-energised during steps 3–6) | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.2 | Model assumption — pending OEM confirmation |
| SOC window for the test | SOC ≤ 5 %; rack isolated, not in standby | CATL EnerC Service Manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1, §6.1 | Model assumption — pending OEM confirmation |
All §6.x clause references target CATL-ESS-SVC-ENRC-2.1.pdf (Rev. 2.1). Direct PDF URL: model assumption — OEM confirmation required. Landing reference: https://www.catl.com/en/ess/ | accessed 2026-09-22.
| Step # | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Receive and review the E-stop test checklist and LOTO register from the integrator; confirm scope and interfaces. | Site Supervisor | E-stop-test-checklist-CNUY.xlsx |
E-stop-prejob-brief.docx |
Pre-job brief signed by both crew members and filed. |
| 2 | Confirm PPE and stage calibrated tools: digital multimeter (Fluke 87V class), insulation resistance tester (1500 V DC range), label printer. | Safety Observer | PPE-issue-log.xlsx |
Tool-staging-record.pdf |
Each tool asset tag recorded and instrument calibration dates verified. |
| 3 | Isolate the rack: open the DC disconnect, open the AC breaker, apply LOTO devices on each isolation point; rack SOC confirmed ≤ 5 % before contact. | Qualified Electrician | LOTO-register-CNUY.xlsx |
LOTO-confirmation.pdf |
Voltage tester reads 0 V DC and 0 V AC at the test points.¹ |
| 4 | Visual inspection of the E-stop loop wiring, push-buttons, Pilz PNOZ s5 safety relay (component-level reference only — not a product-certification claim), contactor coils; re-torque coil terminals to 2.5 N·m if torque marks are missing; record photo IDs and any anomalies. | Qualified Electrician | ESS-wiring-diagram-CNUY.pdf |
E-stop-visual-inspection.pdf |
Every push-button, terminal, and crimp has a photo ID in the project folder. |
| 5 | Continuity and insulation resistance test of the loop: measure end-to-end continuity (≤ 1.0 Ω) and apply 1500 V DC for 1 min; record measured resistance (Ω) and insulation resistance (MΩ). | Qualified Electrician | CATL-ESS-SVC-ENRC-2.1.pdf (model assumption — URL pending OEM confirmation) |
E-stop-loop-measurements.csv |
Continuity ≤ 1.0 Ω; insulation resistance ≥ 10 MΩ at 1500 V DC.² |
| 6 | Restore control power only. Functional test of every E-stop actuator; verify all contactors open and the PNOZ s5 safety relay drops out within 30 ms. | Qualified Electrician | CATL-ESS-SVC-ENRC-2.1.pdf (model assumption — URL pending OEM confirmation) |
E-stop-functional-test.csv |
Each actuator causes a hard open of all contactors within the 30 ms relay drop-out limit. |
| 7 | Reset each E-stop, perform the OEM-defined restart sequence; verify BMS resumes telemetry and the inverter (Sungrow ST3448KUD-MV) returns to standby without latched faults. | Commissioning Engineer | BMS-interface-list.pdf |
E-stop-reset-record.csv |
BMS heartbeat visible on the SCADA and no E-stop-related latched fault in the inverter event log. |
| 8 | Close out: record pass/fail per actuator, raise a non-conformance report for any failed step, sign off the test record, upload to the project quality folder. | Site Supervisor | E-stop-functional-test.csv |
E-stop-test-report.pdf |
Test report signed by the qualified electrician and the safety observer, and filed. |
¹ Voltage verification and SOC pre-condition per §6.1 and §6.2 of OEM service manual CATL-ESS-SVC-ENRC-2.1, Rev. 2.1 — model assumption; direct PDF URL pending OEM confirmation. Reference landing: https://www.catl.com/en/ess/ | accessed 2026-09-22. · ² Continuity threshold, insulation test voltage (1500 V DC / 1 min), and minimum insulation resistance (≥ 10 MΩ) per §6.3 of the same revision — model assumption; direct PDF URL pending OEM confirmation. Reference landing: https://www.catl.com/en/ess/ | accessed 2026-09-22.
Files named literally, as they appear in the project folder:
E-stop-test-checklist-CNUY.xlsxLOTO-register-CNUY.xlsxPPE-issue-log.xlsxESS-wiring-diagram-CNUY.pdfBMS-interface-list.pdfCATL-ESS-SVC-ENRC-2.1.pdf (OEM service manual, Rev. 2.1 — model assumption; direct URL pending OEM confirmation; not bundled with this SOP)E-stop-prejob-brief.docxTool-staging-record.pdfLOTO-confirmation.pdfE-stop-visual-inspection.pdfE-stop-loop-measurements.csvE-stop-functional-test.csvE-stop-reset-record.csvE-stop-test-report.pdf| Phase | Duration | Depends on | Notes |
|---|---|---|---|
| Mobilisation and tool staging | indicative 0.5 day | Pre-job brief approved | On the ground in Montevideo or the project site. |
| LOTO and visual inspection | indicative 1 hour | DC and AC isolation confirmed; SOC ≤ 5 % | Two-person rule applies. |
| Continuity and insulation test (1500 V DC, 1 min) | indicative 1 hour | Visual inspection closed | Allow for the 1 min dielectric soak per §6.3.2 (model assumption). |
| Functional E-stop actuation | indicative 1 hour | Insulation test pass | Control-power only, DC and AC still isolated. |
| Reset, restart sequence, BMS handshake | indicative 0.5 hour | Functional actuation pass | SCADA confirmed. |
| Close-out and sign-off | indicative 0.5 hour | All steps above | Report archived in project folder. |
Durations are indicative only and depend on site access, weather, and whether the LFP racks have already been energised on a previous visit.
| Cost item | Status | Notes |
|---|---|---|
| Crew day rate (2-person crew) | indicative | Pricing depends on mobilisation city and project duration. |
| Instrument re-calibration (if expired) | UNCERTAIN | Only charged if the multimeter or insulation tester is out of date. |
| Spare E-stop push-button kit (Schneider XB4BS8444) | indicative | Optional carry-over from the integrator kit (model assumption). |
| Return visit (if failed step) | UNCERTAIN | Billed per diem plus travel; not included in the standard SOP fee. |
No fixed prices are published on this page. Indicative figures are guidance only and depend on the specific contract.
HS code — lithium-ion accumulator cabinets (vertical LFP ESS): 8507.60 (Lithium-ion accumulators, including separators, whether or not rectangular or square). For an ESS cabinet that is a finished energy-storage assembly with power conversion, customs authorities may also reference 8504.40 (Static converters) for the integrated inverter/PCS sub-assembly, depending on classification practice. [Claim | Src: USITC Harmonized Tariff Schedule search (heading 8507.60 lookup) | URL: https://hts.usitc.gov/ | accessed 2026-09-22]
Applied MFN tariff rate (UY): Model assumption — pending DNA confirmation against the official portal (assumed: applied MFN rate mirrors MERCOSUR Common External Code 8507.60 until DNA confirms in writing).
Official reference portal (UY): Dirección Nacional de Aduanas — https://www.aduanas.gub.uy (Arancel Nacional de Importaciones — DNA). [Claim | Src: Dirección Nacional de Aduanas (UY) | URL: https://www.aduanas.gub.uy | accessed 2026-09-21]
UY DNA Arancel portal page for HS 8507.60 lookup: Dirección Nacional de Aduanas — Arancel Nacional de Importaciones (HS 8507.60 lithium-ion accumulators lookup). [Claim | Src: UY DNA Arancel portal | URL: https://www.aduanas.gub.uy | accessed 2026-09-22]
EU cross-reference (MERCOSUR ↔ EU): for parallel EU-bound flows, EU TARIC consultation is the authoritative lookup. [Claim | Src: European Commission, Taxation and Customs Union, TARIC consultation | URL: https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en | accessed 2026-09-22]
Reference classification source (international): World Customs Organization Harmonized Commodity Description and Coding System — explanatory notes for headings 85.04 and 85.07. [Claim | Src: World Customs Organization, Nomenclature — instrument and tools (incl. HS Nomenclature explanatory notes access) | URL: http://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools.aspx | accessed 2026-09-21]
Disclaimer: classification is determined by the customs authority of the importing country at the time of import. Tradvolt does not give binding tariff advice. Confirm with a customs broker licensed in Uruguay.
Send us your ESS model (we default-quote CATL EnerC LFP-372-1P104S unless stated otherwise), project site in Uruguay, and target mobilisation date. We will reply within 48 hours with a fixed quote and a slot for an on-site crew.
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RFQ form: /rfq/ (live, verified 2026-09-22). On the form, please reference "ESS E-stop Loop Test — CN→UY" in the project notes field.