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Test reports and certificates

What third-party labs tested, to which standards, when, and with what result. Report and certificate numbers are listed so you can ask for a copy.

Type tests

Third-party labs type-tested these units. Select a line to find it on the certificate.

S22-M, 2 000 kVA

S22-M-2000/10-NX1, oil-immersed power transformer, 2 000 kVA, 10 kV. Tested 18 to 22 May 2026; report issued 24 May 2026.

Lab
China National Center for Quality Inspection and Test of Electrical Apparatus Products. CMA 230008349829, CNAS L1020, ILAC-MRA
Standards
With 10 Chinese GB and JB/T standards, including GB 20052-2024
Result
Energy-efficiency Grade 1 under GB 20052-2024

Measured losses

Each bar shows the measured loss against the Grade 1 limit in GB 20052-2024 (the line).

  • No-load loss

    Measured 989.0 W. The Grade 1 limit is 1 085 W. 8.8 % below. Rated 1 080 W.

  • Load loss

    Measured 12 659.0 W. The Grade 1 limit is 13 180 W. 4.0 % below. Rated 13 175 W.

Documents

Type-test certificate 20260592 for S22-M-2000/10-NX1, issued by the China National Center for Quality Inspection and Test of Electrical Apparatus Products. Issue date and signature blurred.
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  • Type-test certificate 20260592
  • Report 26M1152-S
  • Energy-efficiency report CEL-A-20260523-951581

A type-test certificate applies to the sample tested in its report.

Ask for the full report

All tests, standards and filing for S22-M
Unit
Tests
Standards
Filing
DQJC-2026-10438: S22-M, 630 to 2 500 kVA, 10 kV, issued 5 June 2026

SCB18, 2 000 kVA

SCB18-2000/10-NX1, dry-type cast resin transformer, 2 000 kVA, 10 kV. Tested 19 to 22 May 2026.

Lab
China National Center for Quality Inspection and Test of Electrical Apparatus Products. CMA 230008349829, CNAS L1020, ILAC-MRA
Standards
With 9 Chinese GB and JB/T standards, including GB 20052-2024
Result
Energy-efficiency Grade 1 under GB 20052-2024

Measured losses

Each bar shows the measured loss against the Grade 1 limit in GB 20052-2024 (the line).

  • No-load loss

    Measured 1 428.0 W. The Grade 1 limit is 1 760 W. 18.9 % below. Rated 1 755 W.

  • Load loss at 145 °C

    Measured [TBC: value only partly legible on our copy of the report]. The Grade 1 limit is 14 005 W. Rated 14 000 W.

Documents

Type-test certificate 20260564 for SCB18-2000/10-NX1, issued by the China National Center for Quality Inspection and Test of Electrical Apparatus Products. Issue date and signature blurred.
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  • Type-test certificate 20260564
  • Report 26N0992-S
  • Energy-efficiency report CEL-A-20260524-227886 (lab no. 26N0993-S)

A type-test certificate applies to the sample tested in its report.

Ask for the full report

All tests, standards and filing for SCB18
Unit
Tests
Standards
Filing
DQJC-2026-10457: SCB18, 630 to 2 500 kVA, 10 kV, issued 9 June 2026

SZ20, 8 000 kVA

SZ20-8000/35, oil-immersed power transformer with on-load tap-changer, 8 000 kVA, 35/10.5 kV. Tested 13 July to 12 August 2025; issued 12 August 2025.

Lab
Anhui Product Quality Supervision & Inspection Research Institute
Standards
GB/T 1094.1, .2, .3, .5 and .10With GB/T 6451-2023, GB/T 7595-2017 and JB/T 501-2021
Result
PassedType test, including measurements before and after the short-circuit withstand test

[TBC: measured losses for the SZ20]

Documents

  • Report (2025) 皖检JZ字第0594号

Ask for the full report

All tests, standards and filing for SZ20
Unit
SZ20-8000/35, oil-immersed power transformer with on-load tap-changer, 8 000 kVA, 35/10.5 kV
Tests
Type test, including measurements before and after the short-circuit withstand test
Standards
GB/T 1094.1, GB/T 1094.2, GB/T 1094.3, GB/T 1094.5, GB/T 1094.10, GB/T 6451-2023, GB/T 7595-2017, JB/T 501-2021

All test records

The three records above, plus earlier reports. Rows marked "company brochure" are listed as the brochure states them; we have not yet seen those reports.

  • S22-M-2000/10-NX1

    Lab
    Suzhou Electrical Apparatus Science Research Institute
    Report or certificate
    Report 26M1152-S, certificate 20260592
    Date
    Tested 18 to 22 May 2026, report issued 24 May 2026
    Scope
    Routine and type tests
    Result
    Passed. Grade 1 under GB 20052-2024

  • SCB18-2000/10-NX1

    Lab
    Suzhou Electrical Apparatus Science Research Institute
    Report or certificate
    Report 26N0992-S, certificate 20260564
    Date
    Tested 19 to 22 May 2026
    Scope
    Routine and type tests
    Result
    Passed. Grade 1 under GB 20052-2024

  • SZ20-8000/35/10.5 kV

    Lab
    Anhui Product Quality Supervision & Inspection Research Institute
    Report or certificate
    Report (2025) 皖检JZ字第0594号
    Date
    Tested 13 July to 12 August 2025, issued 12 August 2025
    Scope
    Type test
    Result
    Passed

  • S13-M-400/15/0.4

    Lab
    Suzhou Electrical Apparatus Science Research Institute
    Report or certificate
    Report 24M0758-S
    Date
    2024
    Scope
    Commissioned test
    Result
    [TBC: result, to be read from the report]

  • SCB14-2000/10-NX2

    Lab
    Zhejiang Fangyuan Testing Group
    Report or certificate
    Report 23133B41263, certificate 2023678
    Date
    December 2023
    Scope
    Type test
    Result
    Passed (source: company brochure)

  • S20-M-2000/10-NX2

    Lab
    Zhejiang Fangyuan Testing Group
    Report or certificate
    Report 24119B30120
    Date
    April 2024
    Scope
    Energy-efficiency test
    Result
    Grade 2 under GB 20052-2020 (source: company brochure)

Model filings

A model filing registers a range of ratings with the lab, based on a type test of one unit in that range. The lab states that each model below complies with China's rules for transformer model filing.

  • DQJC-2026-10438

    Range filed
    S22-M, 630 to 2 500 kVA, 10 kV
    Based on report
    26M1152-S
    Issued
    5 June 2026
    Model filing certificate DQJC-2026-10438 for S22-M, 630 to 2 500 kVA, 10 kVShow the whole page

  • DQJC-2026-10457

    Range filed
    SCB18, 630 to 2 500 kVA, 10 kV
    Based on report
    26N0992-S
    Issued
    9 June 2026
    Model filing certificate DQJC-2026-10457 for SCB18, 630 to 2 500 kVA, 10 kVShow the whole page

Quality management

ISO 9001:2015 (GB/T 19001-2016), certified by ZQHX Certification Center. Scope: production and sales of oil-immersed and dry-type power transformers. Issued 2 April 2024, valid until 1 April 2027.

What the marks on a Chinese test report mean

CMA
China's mandatory approval for inspection and testing bodies, granted by the market regulator. A lab needs it to issue test data that counts in China, and only for tests within its approved scope. The Suzhou lab's number on our certificates is 230008349829.
CNAS
The China National Accreditation Service for Conformity Assessment, China's national accreditation body. "CNAS L1020" on our certificates is the Suzhou lab's accreditation number.
ILAC-MRA
CNAS signs the International Laboratory Accreditation Cooperation Mutual Recognition Arrangement. Accreditation bodies that sign it accept each other's laboratory accreditations as equivalent.
Type test
A test on one unit that represents a design, to show the design meets requirements that the routine tests on every unit don't cover (IEC 60076-1).

The factory's test station

The factory's transformer test station, in the production hall.

The type tests on this page were run by the third-party labs named in each record.

An oil-immersed transformer with the company plate, in front of the test station building in the factory hall

Need a report that isn't listed?

Or the full text of one that is? Ask with the report number.

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