3-laboratory work work with insulating rods

Device. Structurally, such an insulating device can be divided into three main sections:

Working - is a metal tip with a different configuration, depending on the purpose of the insulating rod;

Insulating - designed to protect the worker from the section of the electrical installation under voltage, where manipulations are performed. Made from dielectric material. The length of the insulating section must correspond to the voltage for which it is used.

Handle - like the previous section, it is made of insulating materials, together they can form a monolithic rod. Always the handle and the insulating part are separated by a restrictive ring, which is designed to prevent hands from slipping to a dangerous distance.

Test Method.
During electrical tests, increased voltage is applied to the insulating links. For models for voltages ranging from 1 to 35 kV, three times the line voltage is supplied, but not less than 40 kV. For insulating rods of 110 kV and more, their electrical insulation is checked by three times the phase voltage. Voltage must be applied to the insulating section from the ring to the working tip for 5 minutes by setting the alternating current to 50 Hz.
Testing of the operational rod should be carried out at least once every 24 months, and the measuring rod at least once every 12 months.
Requirements for insulating rods. According to the established standards, these devices must meet the following requirements:
• Each model must include at least three parts. If it is necessary to extend or fold, a large number of elements can be used in composite rods, but without compromising the insulating gap.
• The design of the working tip must be securely attached to the insulating element, avoiding wobble or movement..
• The tip must clearly grasp the element for which it is intended - the fuses. Disconnector knives, wire clamps and others. It is forbidden to use a specific rod or nozzle for other purposes.
• In relation to protective earths, the design of the rod must securely fix the earth cable for tightening and unscrewing the clamp.Конструкция заземления и точки его фиксации должны предотвращать выпадение зажима, которое может произойти от динамического удара, когда они проводят ток КЗ.
• The force applied to the handle must not exceed 80 N for measuring instruments and not more than 160 N for all others. The boom must be operated by one person, only for models of 500 kV and more, its folding and installation must be controlled simultaneously by two people.