{"id":2533,"date":"2026-02-24T08:39:16","date_gmt":"2026-02-24T08:39:16","guid":{"rendered":"https:\/\/cnkuangya.com\/?p=2533"},"modified":"2026-10-28T16:12:22","modified_gmt":"2026-10-28T08:12:22","slug":"china-spd-factory-suggest-how-to-find-a-high-quality-dc-spd-manufacturer","status":"publish","type":"post","link":"https:\/\/cnkuangya.com\/de\/blog\/china-spd-factory-suggest-how-to-find-a-high-quality-dc-spd-manufacturer\/","title":{"rendered":"Wie man einen Hersteller f\u00fcr PV-DC-\u00dcberspannungsschutzger\u00e4te ausw\u00e4hlt: Checkliste f\u00fcr Lieferanten"},"content":{"rendered":"

Kurze Antwort:<\/strong> A reliable PV DC surge protective device (SPD) supplier should be able to show a traceable datasheet, applicable test evidence, an installation diagram and a repeatable quality-control process for the exact model you plan to buy. Start with the electrical requirements of your project, then compare suppliers against the same checklist.<\/p>\n

First define the PV application<\/h2>\n

Record the PV array’s maximum corrected open-circuit voltage, earthing arrangement, inverter input rating, lightning exposure, installation location and required SPD class. The DC side of a PV system is not interchangeable with an AC distribution circuit. IEC 61643-31:2018 sets requirements and tests for SPDs connected to the DC side of PV installations up to 1,500 V DC. IEC 61643-32:2017 addresses selection and application principles for PV SPDs. Check the editions and local adoption relevant to your market.<\/p>\n

IEC 61643-31 does not cover every DC application. Its published scope excludes PV systems with energy storage such as batteries. For an energy-storage or other DC system, ask which standard and test evidence apply to that specific circuit rather than assuming a PV SPD certificate covers it.<\/p>\n

What to request from each DC SPD manufacturer<\/h2>\n\n\n\n\n\n\n\n\n\n
Document or evidence<\/th>\nWarum das wichtig ist<\/th>\nVergleichskriterien<\/th>\n<\/tr>\n<\/thead>\n
Model-specific datasheet<\/td>\nDefines the ratings offered for the exact order code<\/td>\nUcpv, In, Imax, Iimp if Type 1, Up, Iscpv, poles and temperature range<\/td>\n<\/tr>\n
Test report or certificate<\/td>\nConnects a declared standard to a tested product<\/td>\nModel numbers, standard edition, issuing body, report date and scope<\/td>\n<\/tr>\n
Wiring and backup-protection instructions<\/td>\nSupports safe application in the target system<\/td>\nPV array configuration, disconnector, external fuse or breaker and conductor sizes<\/td>\n<\/tr>\n
Production quality records<\/td>\nShows whether output is checked consistently<\/td>\nIncoming inspection, final test plan, lot traceability and nonconformity process<\/td>\n<\/tr>\n
Commercial and support terms<\/td>\nDetermines what happens if a batch fails or specifications change<\/td>\nWarranty scope, replacement lead time, revision control and technical contact<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Do not treat a certificate image or a claim of \u201cIEC compliant\u201d as sufficient on its own. Match the certificate and report to the precise model, ratings and factory. Ask for clarification when the document identifies a different order code or an older construction.<\/p>\n

Check the ratings in the right order<\/h2>\n
    \n
  1. Ucpv:<\/strong> verify maximum continuous operating voltage against the highest corrected PV array voltage under the site’s lowest expected temperature.<\/li>\n
  2. Type and impulse duty:<\/strong> determine whether Type 1, Type 2 or a combined product is required by the lightning risk assessment and installation design.<\/li>\n
  3. In, Imax and Iimp:<\/strong> compare values only when the test waveform and class are stated. A large kA figure alone does not identify the correct product.<\/li>\n
  4. Auf:<\/strong> coordinate the voltage protection level with the inverter or other protected equipment’s withstand capability, allowing for installed connection length.<\/li>\n
  5. Iscpv and disconnection:<\/strong> confirm the declared PV short-circuit capability, internal disconnector and any required external backup protection.<\/li>\n
  6. Connection and environment:<\/strong> verify pole arrangement, protective earthing, enclosure, temperature and service access for the actual site.<\/li>\n<\/ol>\n

    For system-level placement, compare the supplier’s proposed arrangement with PV inverter protection on both the DC and AC sides<\/a>. A DC-side PV SPD does not replace overcurrent protection, an isolator or an AC-side SPD.<\/p>\n

    How to qualify the factory without relying on marketing claims<\/h2>\n

    1. Screen the documents<\/h3>\n

    Send the same requirement sheet to each candidate. Ask for the exact model datasheet, current installation instructions and test evidence. Reject unexplained gaps between the quotation, label, datasheet and certificate. A supplier that identifies a mismatch and proposes a documented alternative is more useful than one that agrees to every requested rating.<\/p>\n

    2. Review quality controls<\/h3>\n

    Ask how incoming components, assembly changes and final inspection are recorded. If an audit is possible, sample one finished lot and trace it through inspection records and bill-of-material revisions. The appropriate test equipment and acceptance criteria depend on the product design; there is no universal generator size, component purity percentage or response-time threshold that proves all DC SPDs are good.<\/p>\n

    3. Validate a sample against the paperwork<\/h3>\n

    Check the delivered label and terminals against the approved drawing. Have qualified personnel review the wiring instructions, status indicator, cartridge arrangement and specified backup device. Use an independent laboratory when a project or market requires third-party verification. Keep the approved sample and document revision as the baseline for later shipments.<\/p>\n

    4. Agree on change control<\/h3>\n

    Define how the supplier will notify you of component, circuit, enclosure or labeling changes. Request batch identification and a practical process for investigating field failures. These controls matter more than unsupported promises about zero failures or an arbitrary number of years in business.<\/p>\n

    Questions to send with your RFQ<\/h2>\n