An electroscope is a tool used to check whether a high-voltage line and power equipment are energized, and is the most basic safety device commonly used in substations. High-voltage electroscopes generally use glow as an indicator signal. New high-pressure electroscopes are also indicated by sound or language. High-voltage electroscope consists of metal working contacts, small helium bubbles, capacitors, and handles. The following Xiaobian introduces the working principle of electroscope and the precautions for using electroscope.
The principle of electroscope
When an electroscope is used for inspection, the object is generally brought into contact with the metal plate. Once the object is charged, there will be a charge transferred to the two gold foils. Since the gold foil has the same charge and the same charge, it will repel each other. In this way, the gold foil will open. The size of the opening will depend on the amount of charge. The more the battery, the wider the angle of opening. When the object itself is not dotted, the gold foil will not separate.
Electroscope use precautions
1. High-voltage electroscopes that are put into use must be electroscopes that are qualified by electrical tests. High-voltage electroscopes must be tested periodically to ensure that they perform well.
2. The use of high-voltage electroscope must wear high-voltage insulating gloves, insulated shoes, and special supervision.
3, before the use of electroscope, should first check the electroscope is good, effective, but also in the voltage level of the live equipment to verify the correct alarm, can only need to ground the equipment on the inspection, prohibit the use of voltage level is not The corresponding electroscope conducts an electrical inspection to avoid making erroneous judgments during on-site testing.
4, when the inspection of electricity must be concentrated, can not do anything that has nothing to do with the inspection of electricity, such as access to mobile phones, etc., in order to avoid wrong test or missing test.
5. The inspection of the line shall be carried out phase by phase. When inspecting the circuit breaker or isolation switch or other maintenance equipment used for communication, the phases shall be inspected on both sides of the incoming and outgoing lines separately.
6. For the inspection of the multi-layer power lines erected on the same tower, a priori low pressure, posterior high pressure, a priori lower level, posterior upper level.
7, in the capacitor bank inspection, should be completed after its discharge is completed.
8, when the inspection of electricity to make the top of the electroscope metal working contact gradually close to the live part, to the bulb light or emit audible alarm signal, can not directly contact the live parts of electrical equipment. The electroscope should not be affected by the adjacent electrified body and send an erroneous signal.
9. If you need to use the ladder during the inspection, you should use a solid ladder of insulating material, and you should take the necessary anti-skid measures and prohibit the use of metal ladders.
10ã€After completion of the test, the grounding operation should be carried out immediately. The grounding should be interrupted for some reason after the inspection. If it is necessary to continue the operation, it must be re-inspected.
Electroscope use and maintenance
1, must be self-test before use, by using your finger to press the self-test button. The indicator light should have intermittent flashes and it emits intermittent alarm sounds. The instrument is normal.
2. When carrying out electrical inspection work for more than 10KV, it is necessary to implement the “Safety Working Procedures for Workers†staff to wear insulated gloves, wear insulated shoes and ensure the safety distance to live equipment.
3. During use, the staff should hold the lower part of the insulation rod to ensure the effective length of the insulation rod. According to the “Working Safety Regulations,†the first inspection should be conducted on the electric facilities to verify the authenticity of the inspection equipment. The performance is good enough to use.
4, the electroscope should be regularly done insulation pressure test, start the test. Moist place for three months, dry place for six months. If you find the product is not reliable, you should stop using it.
5, rain, fog can not be used.
6. The electroscope should be stored in a dry, ventilated, non-corrosive atmosphere.
Editing summary: The working principle of electroscope and the precautions for the use of electroscope are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.
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