The variable-frequency dielectric loss tester, also known as the variable-frequency dielectric loss tester, is a high-precision instrument used for fully automatic on-site measurement of the dielectric loss tangent value and capacitance of various high-voltage power equipment in power plants, substations, and other locations. Due to the adoption of frequency conversion technology, accurate measurement can be ensured under strong electric field interference. The instrument uses a Chinese menu operation, and the microcomputer automatically completes the entire measurement process. This instrument is also suitable for measuring the tgδ and capacitance of high-voltage electrical equipment in workshops, laboratories, and scientific research institutions.

The instrument can measure high-voltage electrical equipment that is ungrounded or directly grounded using the positive or reverse wiring method. It can also measure the tgδ of capacitive voltage transformers and the capacitance of main capacitors C1 and C2.

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

Tester Characteristics




◆ Simple operation, Chinese display, printing

◆ Convenient to use, no conversion needed

◆ The variable-frequency dielectric loss tester comes with its own high voltage, strong anti-interference ability, short test time, and other advantages

Tester Features




Tester Parameters























1. Due to the adoption of frequency conversion technology, accurate measurement can be ensured under strong electric field interference.
2. The instrument uses a Chinese menu operation, and the microcomputer automatically completes the entire measurement process.
3、 This instrument is also suitable for measuring the tgδ and capacitance of high-voltage electrical equipment in workshops, laboratories, and scientific research institutions; it also has the advantages of convenience, simplicity, and accuracy for loss testing of insulating oil.
4、 The instrument can measure high-voltage electrical equipment that is ungrounded or directly grounded using the positive or reverse wiring method. It can also measure the tgδ of capacitive voltage transformers and the capacitance of main capacitors C1 and C2.
5、 The instrument is internally equipped with a high-voltage step-up transformer and has safety protection measures such as zero-crossing closing and lightning protection. During the test, high voltages of different levels from 0.5KV to 10kV are output, making operation simple and safe.





1、High voltage output: 0.5 ～10kV, each level increases by 500V, with a total of 20 levels

High voltage output cable, can be used dragged on the ground

Three frequencies: 45Hz, 50Hz, 55Hz

2、Capacity: 1500VA

3、Accuracy: tgδ: ±(reading*1.0%+0.08%)

Cx: ±(reading*1.5%+5PF)

4、Resolution: tgδ：0.01% Cx：1pF

5、Measurement range: 0.1% < tgδ < 50%

3PF< Cx < 60000PF

At 10KV, Cx ≤30000PF

At 5KV, Cx ≤60000PF

6、Power supply: AC 220V士10% 50士1Hz

7、Harmonic adaptation: ≤3%

8、Operating conditions: -15℃－50℃ relative humidity<80%

9、Dimensions: 460（L）×335（W）×340（H）

10、Weight: 30 kg