The role and technical requirements of insulating gloves
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Insulating gloves are essential protective gear designed to safeguard the hands when working with DC electrical equipment operating at voltages up to 10kV AC or 10kV DC. These gloves must possess excellent electrical insulation properties, high mechanical strength, and a soft texture with a hardness ranging between 30° and 35°. They must also comply with the technical standards set by GB17622-1998, which outlines the general requirements for insulating gloves used in live-line work.
The key technical specifications include:
1. **Electrical Performance**: Insulating gloves must provide reliable electrical insulation. The test voltage waveform, environmental conditions, and testing procedures should strictly follow the guidelines outlined in GB/T 16927.1-1997. This ensures that the gloves can effectively protect against electric shocks under various operational scenarios.
2. **Anti-Aging Properties**: After undergoing heat aging tests, the tensile strength and elongation at break of the gloves should remain above 80% of their original values. Additionally, the tensile permanent deformation should not exceed 15%, ensuring long-term durability and performance.
3. **Low-Temperature Resistance**: When tested under low-temperature conditions, the gloves should show no cracks, breaks, or visible damage. They must also pass an insulation test without any moisture absorption treatment, proving their reliability in cold environments.
4. **Flame Resistance**: According to the specified testing method, if the flame does not spread beyond the 55mm reference line on the glove after being exposed to fire for a short period, the product is considered flame-resistant and safe for use.
5. **Mechanical Properties**:
- **Tensile Strength and Elongation at Break**: The average tensile strength should be at least 14MPa, and the elongation at break should not be less than 600%.
- **Tensile Permanent Deformation**: The deformation after stretching should not exceed 15%.
- **Puncture Resistance**: The gloves must withstand a mechanical piercing force of at least 18N/mm, ensuring they can resist sharp objects during use.
By meeting these rigorous standards, manufacturers can produce high-quality insulating gloves that offer maximum protection and reliability in hazardous electrical environments.
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