Raw material and spare parts control

The test of mechanical properties of metals and alloys is necessary for the correct setting of heat treatment modes of the raw material in the production of the cable terminals, lugs and connectors, tool production, as well as for the control of the ready done goods with the specified requirements..

Both raw materials and ready done items are subjected to electrical strength measurements. Measurements are carried out at alternating voltage. At the point of breakdown, the thickness of the test material is measured and its electrical strength is calculated.

Categories of the flammability of the materials are determined in accordance with GOST 28779-90 and are taken into account in the design of heat-shrinkable kits that are flame retardant, heat-shrinkable tubes, insulating shells and polymeric materials used in the production of the electro technical goods. The ready done items are also subjected to the relevant inspection and tests.

The use of the materials in the cable heat shrinkable terminals, which are resistant to the formation of conductive bridges, permits a reliable operation of the heat shrinkable kits at high humidity under pollution conditions. This property of materials is called tracking resistance and is determined in the KBT laboratory with the help of a special equipment. The unit creates a test voltage in the range from 0 to 6000 V. the class of tracking resistance of the materials is determined in accordance with GOST 27474-87.

Samples of the electrical insulation material are produced in our factory. After the measurements, the specific surface and volume resistances of the materials are calculated. Dielectric properties of the materials are taken into account in the design of cable fittings, as well as in the input control of incoming raw materials and the production of the ready done goods.

Materials with a given value of permittivity can reduce the electric field intensity in the most critical areas of heat shrinkable cable kits. Thanks to the use of these materials, our heat-shrinkable products are reliable and have a long service life.

The KBT laboratory monitors scientific and technical innovations in the field of the composite materials, conducts research and incoming control of the raw materials. According to the results of the research, a decision is made to use the raw materials in the production of the new items.