DL/T 2452-2021 in English
VALIDConstruction, operation and maintenance specification for post insulators used in a.c. and d.c. systems
- Issued on:2021-12-22
- Implemented on:2022-06-22
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$320.00
$311.00
$311.00
| Standard No: | DL/T 2452-2021 |
| Document status: | VALID |
| Title in English: | Construction, operation and maintenance specification for post insulators used in a.c. and d.c. systems |
| Title in Chinese: | 交、直流系统用支柱绝缘子施工、运行和维护规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2021-12-22 |
| Implemented on: | 2022-06-22 |
| Professional Classification: | DL-Electricity |
| Related Keywords: | post insulators
post insulators dc field equipment type test data composite insulators quarter composite insulators insulators |
| Related Topics: | insulator
iec DC insulator Insulation sheet maintenance post insulator system column Insulation column quality line Box support system industry Optical system operation and maintenance standard group standard |
Introduction
Analysis of the core content of the standard
This standard systematically specifies for the first time the full-process technical requirements for post insulators in AC and DC systems, with key points including:
| Technical aspects | AC system requirements | DC system special requirements |
|---|---|---|
| Arrival acceptance | Factory test report and appearance dimensions need to be checked | Polarity mark verification is added |
| Storage conditions | Humidity≤80% | Anti-static packaging is required |
| Operation monitoring | Infrared detection shall be carried out at least once a year | Partial discharge monitoring is required |
Detailed explanation of key technical requirements
4.1 Data acceptance specifications
The type test report of post insulators needs to be verified, with special attention to:
- DC system products should include ±800kV and above type test data
- Composite insulators need to provide a steep wave impact test report
7.2 Installation process control
The installation torque shall comply with the following:
- M12 bolt: 45-55N·m
- M16 bolt: 80-100N·m
- A torque wrench is required for secondary verification
Suggestions for the implementation of the standard
Typical application cases
After a ±800kV converter station adopted this standard:
- Insulator failure rate decreased by 62%
- Annual maintenance cost reduced by 280,000 yuan/station
Key points of technical management
- Establish a full life cycle file for post insulators
- DC field equipment should be tested for hydrophobicity every quarter
- Composite insulators need to be sampled and dismantled for inspection after 10 years of operation
Sample only — not a preview of DL/T 2452-2021
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