The functions and usage precautions of the dielectric loss tester

Dielectric loss tester is a novel method for measuring the tangent value of dielectric loss angle (tg δ） Intelligent instrument with capacitance value (Cx). It is possible to measure the dielectric loss tangent (tg) of various insulation materials, insulation sleeves, power cables, capacitors, transformers, and other high-voltage equipment on site under high power frequency and high voltage conditions δ） And capacitance value (Cx). The dielectric loss tester is an integrated structure with built-in standard capacitors and boost power supply. It is small in size, light in weight, and easy to carry. It has the advantages of simple operation, automatic measurement, intuitive reading, no conversion, high accuracy, and strong anti-interference ability. It can also be used with various specifications of high-voltage standard capacitors produced by our factory for external power supply to measure high-voltage dielectric loss.

The function of the dielectric loss tester:

① The dielectric loss tester adopts frequency conversion technology to ensure accurate measurement under strong electric field interference

② This dielectric loss tester adopts a Chinese menu operation, and the microcomputer automatically completes the entire process of measurement

③ This fully automatic anti-interference dielectric loss tester is also suitable for measuring the tg of high-voltage electrical equipment in workshops, laboratories, and research institutions δ And capacitance

④ The dielectric loss tester can measure high-voltage electrical equipment that is not grounded or directly grounded using positive and negative wiring methods. Simultaneously capable of measuring the tg of capacitive voltage transformers δ And the capacitance of main capacitors C1 and C2

⑤ The tester is internally equipped with a high-voltage step-up transformer and adopts safety protection measures such as zero crossing and closing, and lightning protection. During the test, different levels of high voltage ranging from 0.5KV to 10kV were output, making the operation simple and safe

Precautions for using dielectric loss tester:

① The dielectric loss tester can only be used on power outage equipment; The grounding terminal should be reliably connected to the grounding grid. The anti-interference dielectric loss tester should be used in a spacious, safe and reliable place as much as possible.

② The tested equipment should be switched from running state to maintenance state by disconnecting the high-voltage lead and cleaning it. After the preliminary insulation test is good, the instrument can be used for testing to prevent poor insulation of the tested equipment and damage to the anti-interference dielectric loss tester during the pressurization process.

③ When conducting experiments on large capacitance samples, the grounding of the anti-interference dielectric loss tester and the grounding of the test object should not be at the same grounding point to prevent the impact of back voltage or flow waves on the safety of the instrument during grounding discharge.

④ The dielectric loss tester comes with a boost device, and attention should be paid to the insulation distance of high-voltage leads and personnel safety;

⑤ The dielectric loss tester should be reliably grounded, as poor grounding may cause machine protection or pose a danger.

⑥ After the dielectric loss tester is started, except for special circumstances, it is not allowed to suddenly turn off the power supply to avoid overvoltage damage to the equipment

⑦ Although the dedicated high-voltage wire (HVx) equipped with the instrument has passed the factory inspection, it still needs to be kept away from the human body and the low-voltage test wire (Cx) during measurement; Both the high-voltage core wire and the high-voltage shielding wire are not allowed to be grounded and the low potential part of the test circuit is not allowed. The core wire and shielding wire of the CX input line are not allowed to come into contact with the high-voltage part of the test circuit.

⑧ After issuing the measurement command, the measurement result does not appear on the screen for a long time (1 minute), which may be caused by the sample capacitance being too large or crashing. After restarting, reduce the measurement voltage and retest.

⑨ The short circuit of the test object will prevent measurement, and the anti-interference dielectric loss tester will automatically protect it. When the paper outlet above the machine head extends for a certain length, press the button once to stop feeding the paper. Printing paper is allowed to be pulled out.

ZC-221A fully automatic anti-interference dielectric loss tester is a high-precision instrument for measuring the dielectric loss tangent and capacitance of various high-voltage power equipment in power plants, substations, and other fields. It is also suitable for measuring the tg of high-voltage electrical equipment in workshops, laboratories, and research institutions δ And capacitance; The testing of insulation oil loss has the advantages of convenience, simplicity, and accuracy. The tester can measure ungrounded or directly grounded high-voltage electrical equipment using positive and negative wiring methods, and can also measure the tg of capacitive voltage transformers δ And the capacitance of the main capacitors C1 and C2. Due to the use of frequency conversion technology, accurate measurement can be ensured under strong electric field interference.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.