TS EN / IEC 60903
GLOVES - FROM INSULATING MATERIAL - WORK UNDER VOLTAGE
High voltage gloves have an important place in terms of occupational health and safety. It is an important element for safe operation and protecting the operator mechanically and electrically in electrical networks and high voltage units. The most important factor to be considered during use of high voltage gloves is the level of insulation voltage. Declared insulation levels are determined or verified as a result of the type tests carried out within the scope of TS EN / IEC 60903 standard. As a result of the type tests, the products that are suitable for the working conditions of the products and the declared voltages should be selected.
Type tests for the TS EN / IEC 60903 standard are listed below.
- Classification
- General Features
- Electrical Conditions for Long Mixed Gloves
- General Test Procedures
- Dielectric Tests
- Specific Mechanical Experiments
- Leakage Current Test
1.) Classification
Within the scope of TS EN / IEC 60903 standard, high voltage gloves are classified with Class 00, Class 0, Class 1, Class 2, Class 3 and Class 4 and according to their qualifications in the schedule specified by the standard for special qualifications.
2.) General Features
Physical Properties;
The combination may be all gloves coated or uncoated against chemical influences, may or may not be covered outside, or may consist of special combinations to reduce ozone effects. Gloves used for electrical protection are usually made of elastomer.
The shape should include cuffs on the gloves. The cuff of the gloves can be folded or unfolded.
For gloves with bent arm, the difference should be 50 mm ± 6 mm between the longest and shortest length, except that the difference in long mixed gloves is 100mm ± 12 mm.
The thickness, the smallest thickness, is determined only by its ability to pass dielectric tests.
Workmanship and finishing should not contain harmful physical irregularities that can be detected on both the inner and outer surfaces of the gloves during the test and visual inspection.
The harmful physical irregularities, pinholes, cracks, bubbles, cuts, embedded conductive impurities, folds, pinch marks, air gaps, protruding wavelets and protruding mold marks are determined as any property that disrupts the smooth surface environment.
Mechanical Properties;
The sample taken from the finished glove is applied to the material or the glove itself.
Tensile strength and tensile elongation should not be less than 16 MPa in average tensile strength. Average breaking elongation should not be lower than 600%.
The stress constant should not exceed 15%.
Electrical Properties;
In all gloves, according to the class according to the table specified in the standard, a.a. A positive result should be obtained throughout the validity of the protection test and protection and withstand voltage tests.
Aging Conditions;
To simulate the effects of aging, the test sample pieces are subjected to high temperature tests.
Thermal Conditions;
After undergoing a low temperature resistance test, no tears, ruptures or cracks should appear on the gloves.
Sample pieces taken from gloves must be of flame retardant type.
Special quality gloves;
Acid-resistant, Oil-resistant, Ozone-resistant, Acid-oil and ozone-resistant and very low temperature-resistant, tested in 5 different categories.
Marking;
The sign suitable for operation under voltage (double triangle), standard number and year of publication, manufacturer's name, category, size, class, serial number, manufacturing month and year should be on the product.
Specific Mechanical Properties;
Insulating gloves verify their mechanical puncture resistance.
Mixed gloves are verified for mechanical puncture resistance, abrasion resistance, cut resistance, and tear resistance.
3.) Electrical Conditions for Long Gloves
Long mixed gloves should provide safe working test voltage conditions.
4.) General Test Procedures
Visual inspection should be carried out by a normal or spectacled person, without additional magnification. The shape of the glove should be confirmed by visual inspection. The length of the glove should be measured from the tip of the second finger to the outer edge of the cuff. Thickness measurements should be measured at one or more points in the 'fingerprint' area of the thumb, forefinger and forefinger, at four or more points in the palm of the glove, at four or more points, but not at the cuff.
5.) Dielectric Tests
The arm should be filled with tap water with a specific resistance less than or equal to 100 µS / cm and immersed in a water tank of the appropriate depth specified in the standard.
6.) Specific Mechanical Tests
Abrasion resistance is verified by shear strength and tear strength tests.
7.) Leakage Current Test
Applies only to long mixed gloves.