DL 493-2015 in English
VALIDSafety Regulations for Low-votage Electricity Consumption in Rural Areas
- Issued on:2015-04-02
- Implemented on:2015-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$300.00
$291.00
$291.00
| Standard No: | DL 493-2015 |
| Document status: | VALID |
| Title in English: | Safety Regulations for Low-votage Electricity Consumption in Rural Areas |
| Title in Chinese: | 农村低压安全用电规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2015-04-02 |
| Implemented on: | 2015-09-01 |
| Superseding: |
DL 493-2001 The rural electric safe working code
|
| Professional Classification: | DL-Electricity |
| Related Keywords: | low-votage electricity consumption
management department technical contentbasic safety safety regulations line end typical scenario implementation specifications agricultural production electricity mobile rural areas introduction core changes |
| Related Topics: | Agriculture and Rural Institutions
jc/t 493-2015 Agriculture and Rural Program rural black The 14th Five-Year Plan for Village Security Low-voltage power distribution room safety Quarantine Regulations of the Ministry of Agriculture and Rural Affairs Agriculture and rural areas Zhang Fu dl493-2015 |
Introduction
Core changes in the standard revision
| Comparison dimensions | DL493-2001 | DL493-2015 |
|---|---|---|
| Division of responsibilities | Detailed provisions on the responsibilities of the three parties | Streamlining of the responsibilities of the management department |
| Technical content | Basic safety requirements | Added 8 technical specifications such as distributed power supply access and extra-low voltage application |
| Accident prevention | General clauses | Targeted protective measures based on the statistics of electric shock accidents in the past decade |
Analysis of key technical requirements
1. Grounding system selection
Rural low-voltage power grids should give priority to the TT system:
- Direct grounding of the neutral point of the transformer
- Independent setting of equipment protective grounding
- Must be used in conjunction with residual current protection devices
Renovation case of a village in Anhui: After the original TN-C system was changed to a TT system, the electric shock accident rate decreased by 72%
2. Residual current protection configuration
| Protection level | Action current | Action time | Installation location |
|---|---|---|---|
| Total protection | ≤300mA | ≤0.3s | Distribution transformer outlet |
| Intermediate protection | 100-150mA | ≤0.2s | Branch line |
| Final protection | ≤30mA | ≤0.1s | User incoming line end |
Typical scenario implementation specifications
Agricultural production electricity
- Mobile submersible pumps must implement "one machine, one gate, one protection"
- Temporary power line cross-sectional area ≥6mm²
- Waterproof treatment is required for irrigation cable connectors.
Safe use of electricity in the home
- Socket installation height ≥1.8m (children's activity area)
- It is prohibited to lay weak current and strong current in the same pipe
- Disconnect the TV antenna in thunderstorms
Standardized emergency rescue process
Key parameters of cardiopulmonary resuscitation:
- Compression depth: 4-5cm for adults
- Compression frequency: 100-120 times/minute
- Compression-ventilation ratio: 30:2 (single person)
Continue rescue until professional medical staff arrives, and the interruption time shall not exceed 30 seconds
Sample only — not a preview of DL 493-2015
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
DL/T 790.12-2001 in English
Distribution Automation Using Distribution Line Carrier Part 1: General Provisions Part 2: Guidelines for Formulation of Specifications
2001-12-26
