Selection Methods and Acceptance Criteria for High-Voltage Busbar Trunking Systems
Release time:
2023-03-02
Source:
The selection and acceptance criteria for high-voltage busbar trunking systems are as follows: if an air-insulated type is used, glass wool insulation panels must be installed within the trunking enclosure to provide thermal and acoustic isolation between modules. For particularly critical applications, fire-resistant trunking should be selected to ensure continued operation of the backup power supply in the event of a fire.
High pressure Busbar trunking Selection methods and acceptance
When selecting, the following factors should be given full consideration: fire-resistance standards; the insulation layer must be flame-retardant and have excellent temperature resistance, with minimal release of harmful gases at high temperatures; the structural design should prevent the chimney effect, and busbar trunking with bundled insulation should be prioritized. If air-insulated types are used, glass wool blankets must be installed as partition linings within the trunking enclosure for each module. For particularly critical applications, fire-rated trunking is recommended to ensure continued operation of backup power supplies during a fire.
When selecting a busbar trunking system for an installation site, the first consideration should be the enclosure’s ingress protection rating; secondly, the building’s structural design will influence the busbar trunking’s aesthetic appearance, mounting bracket configuration, and span requirements. For dedicated indoor office spaces, such as large-space substations, an IP30-rated busbar trunking is recommended to ensure safety. In typical indoor applications, such as electrical shafts and switchgear rooms in multi-story buildings, a busbar trunking with at least an IP40 rating should be selected to guarantee safety. In damp indoor environments, or where splash-proof performance is required, a comprehensive evaluation is necessary, taking into account technical specifications, heat dissipation performance, cost, and other factors. Currently, the market predominantly offers busbar trunking systems with high thermal conductivity, low energy consumption, aluminum enclosures, and low-impedance, compacted-insulation designs.
How to accept Busbar trunking ?
First, review the accompanying documentation for the busbar trunking system: at a minimum, this should include photocopies of the CCC certification and test reports, as well as the quality inspection report for the busbars used in the system. Where necessary, operating instructions for the busbar trunking system should also be provided. Of course, you should also verify the nameplate, certificates, and any additional relevant information.
Second, physical acceptance inspection: In accordance with the contract and the busbar trunking system test report, the dimensions and dimensional ratios of the busbar conductors shall be verified to ensure compliance with the corresponding current rating and the specified dimensional ratios; standard tolerances shall be strictly applied in accordance with the tolerance requirements stipulated in GB/T 5585 for engineering acceptance. The delivery method of the busbar trunking system shall also be verified to ensure compliance with the contractual provisions. Basic tests for the busbar trunking system include: grounding resistance measurement, AC withstand voltage test, continuity test of the distribution circuit under maintenance conditions, protection class test, and, for systems equipped with plug-in boxes, mechanical performance testing. Following these inspections, plug-in testing shall be conducted.
Busbar trunking Key Technical Aspects of Quality Management
A. Turn off the “temperature” setting for the busbar trunking system to ensure the cable current-carrying capacity of the busbar trunking system;
B. Disable the busbar trunking system’s “waterproof rating” to ensure its dust- and water-proof performance;
C. Deactivate the “short-circuit fault withstand pressure resistance” of the busbar trunking system to ensure its dynamic performance and thermal endurance;
D. Disable the “PE conductor configuration” of the busbar trunking system to ensure that fault currents in the busbar trunking do not pose a serious threat to personal safety or the safety of electrical equipment;
The “raw materials for the electrical conductors” of enclosed busbar trunking systems shall ensure that the resistivity and conductivity of the commonly used conductors comply with the relevant regulations.
Company News
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