Inside Liqiang’s switching-device workshop: assembly, adjustment, inspection and the documents that support equipment selection.
Switching-device assembly workshop at Liqiang.
Liqiang manufactures vacuum circuit breakers, load break switches, disconnectors and earthing switches. The construction and operating duty determine the assembly and inspection work for each device.
Mechanisms, vacuum interrupters, insulation, conductive parts and machined components are checked against their identification, drawings and applicable inspection requirements.
Springs, linkages and operating elements are assembled with the pole structure, insulating supports and conductive connections for the selected construction.
Contact travel, mechanical movement and the operating sequence are adjusted against the model requirements. Manual and electrical functions are checked as applicable.
The assembled structure, primary and secondary circuits, operating functions, markings and selected configuration determine the checks for the finished equipment.
These October 2020 photographs show a fiber-laser cutting machine in the workshop. They document the equipment at that time; current fabrication requirements should be confirmed for the project.
Checks cover the assembled device and its operating interfaces. Mechanical characteristics, main-circuit resistance, insulation and control functions are selected according to the model and its technical requirements.
The control station and enclosed test area support the corresponding electrical measurements. The instrument range and procedure determine the applicable measurement scope.
A portable tester is used for voltage-current characteristic measurements. The required transformer and test points determine the setup.
High-current equipment forms part of a temperature-rise test setup. Current-output calibration and temperature measurement are separate parts of the measurement chain.
Dedicated test cabinets support checks of primary and secondary integrated equipment. Product and controller configuration determine the applicable functions.
| Instrument | Record / calibration date | Scope |
|---|---|---|
| GYPD-20/150 | DN260049130016 28 February 2026 | Specified metrology items in the power-frequency / partial-discharge equipment record; accreditation coverage is item-specific. |
| HZ8006 | DN260049130019 28 February 2026 | Listed voltage and current measurement points; the current results extend to 20 A. |
| HZJC-2500A | DN260049130001 28 February 2026 | Current-output calibration. Temperature channels and product temperature-rise results require their own records. |
| KE9806 | 26KY019605001 3 January 2026 | Specified measurement items for the integrated-equipment test system. |
Instrument calibration supports the stated measurements. Product test reports address a named sample and test scope. For a project, confirm both the equipment configuration and the records needed for acceptance.
Product condition, nameplate, configuration and matched accessories are checked together before packing. The document set follows the selected equipment and project requirements.
The VS1-12/1250-31.5 process documents set out assembly operations and inspection requirements. The dated examples below apply to this configuration.
Process cards define what is required at an operation. Completed inspection records serve a separate purpose: recording the checks for the actual unit or batch. For VS1-12 selection, use the model documents alongside the required ratings and construction.
The certificates below identify Zhejiang Liqiang Intelligent Equipment Co., Ltd., their stated scope and printed dates. Open the original certificate image and the matching surveillance attachment where provided.
Quality management
Production of high-voltage switches and high-voltage vacuum circuit breakers.
Printed validity: 2 June 2024–1 June 2027.
View certificate and surveillance attachment
Environmental management
Production of high-voltage switches and high-voltage vacuum circuit breakers.
Printed validity: 2 June 2024–1 June 2027.
View certificate and surveillance attachment
Occupational health and safety
Production of high-voltage switches and high-voltage vacuum circuit breakers.
Printed validity: 2 June 2024–1 June 2027.
View certificate and surveillance attachment
Energy management
Energy management for the stated assembly, inspection, auxiliary and office processes.
Printed validity: 6 June 2025–5 June 2028.
View certificate
Management-system certification concerns the stated organizational processes. For product compliance, review the exact model, construction and applicable test documentation separately.
These supporting records are third-party management-system certifications. Their names refer to the issuing body’s assessment scheme.
Issued by Zhongzheng Excellent Certification Group Co., Ltd. under CTS ZZEC1015-2025. Printed term: 7 July 2025–6 July 2028.
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Issued by Zhongzheng Excellent Certification Group Co., Ltd. under CTS ZZEC1024-2025. Printed term: 16 July 2025–15 July 2028.
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Issued by Zhongzheng Excellent Certification Group Co., Ltd. under CTS ZZEC1017-2025. Printed term: 7 July 2025–6 July 2028.
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Issued by Zhongzheng Excellent Certification Group Co., Ltd. under CTS ZZEC1014-2025. Printed term: 7 July 2025–6 July 2028.
View full recordEnvironmental, energy and supply-chain records support supplier review. The scope and period of each record determine how it applies to a procurement requirement.
Issued by ZhongQiu United International Certification (Beijing) Co., Ltd. against GB/T 33635-2017 and GB/T 39257-2020. Printed term: 6 June 2025–5 June 2028.
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Issued by ZhongQiu United International Certification (Beijing) Co., Ltd. against CTS-ZQA-SC-0017:2023. Printed term: 6 June 2025–5 June 2028.
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Issued by ZhongQiu United International Certification (Beijing) Co., Ltd. against DB4403/T 146:2021 and CTS ZQA 19988:2023. Printed term: 6 June 2025–5 June 2028.
View full recordThe record dated 12 May 2025 documents the purchase of 50 green electricity certificates corresponding to 50 MWh, with a generation period of November 2024. This is a dated transaction record; an annual renewable-electricity share requires the corresponding consumption and certificate-use records.
