Explanation Of Common Terms For High Voltage Test Equipment

       In order to help you understand the high-voltage test more completely, GDZX, the manufacturer of high-voltage test equipment, will sort out the explanation of common terms of high-voltage test equipment in this paper, hoping to help you.

1. Dielectric: also known as insulating material, referred to as insulation, is one of the most widely used materials in electrical engineering.

2. Insulation resistance: the resistance corresponding to the leakage current flowing through the dielectrics after a certain period of time after applying DC voltage to the dielectrics.

3. Absorption ratio: in the same test, the ratio of the insulation resistance value at 60s to the insulation resistance value at 15s.

4. Polarization index: in the same test, the ratio of the insulation resistance value at 10min to the insulation resistance value at 1min.

5. Dielectric loss: under the action of external voltage, part of electric energy in the dielectric is converted into heat energy, which is called dielectric loss.

6. Resistive current: a lossy medium can be represented by a parallel circuit with an ideal capacitance and an effective resistance. The current passing through the resistance is called resistive current.

7. Capacitive current: the lossy medium can be represented by a parallel circuit with an ideal capacitance and an effective resistance. The current passing through the capacitance is called capacitive current.

8. Full current: the lossy medium can be represented by a parallel circuit with an ideal capacitance and an effective resistance. The current through the capacitance is called the capacitance current and the current through the resistance is called the phase sum of the resistance current, which is called the full current.

9. Dielectric loss: the angle between the total current and the capacitance current in the dielectric, which is called the dielectric loss angle.

10. On line measurement: for the equipment under the operating voltage, special instruments are used, and the measurement is conducted with the participation of personnel. 

11. Online monitoring: under the condition of not affecting the operation of the equipment, the continuous or timed detection of the equipment condition is usually automatic.

12. Condition based maintenance: from time-based maintenance to equipment operation status based maintenance.

13. Preventive test: in order to discover the hidden dangers of the equipment in operation and prevent accidents or equipment damage, the inspection, test or detection of the equipment also includes the test of taking oil or gas samples.

14. Transformation ratio: the ratio of turns of high voltage side winding and low voltage side winding of transformer is called transformation ratio, which can be approximately expressed by the ratio of rated voltage of high voltage side and low voltage side.

15. Volt ampere characteristic: the relationship between voltage and current applied at both ends of electrical equipment or components is called volt ampere characteristic.

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