Due to the large capacitance of the insulation layer of the cable, it is required that the dielectric loss instrument have a large testing capacity and a high testing voltage. For example, for 35kV cables, the dielectric loss test voltage should be 1.5 times U0 (i.e. 39KV). The conventional power frequency dielectric loss tester has a small load capacity and a low test voltage (less than 12KV), which cannot meet this testing requirement. Ultra low frequency has strong carrying capacity due to its low operating frequency, making it suitable for conducting dielectric loss tests on cables.

Part 1: Introduction to the ultra-low frequency and high voltage power supply series products

1.1 Product Features Introduction

1.2 Product Specification Table for Ultra Low Frequency High Voltage Power Supply Series

1.3 Technical indicators of ultra-low frequency and high voltage power supply

1.4 Main structure of ultra-low frequency and high voltage power supply

1.5 List of accessories for ultra-low frequency and high voltage power supply

Part 2: Operating Instructions for Ultra Low Frequency Voltage Withstand Test

2.1 Wiring method for ultra-low frequency withstand voltage test

2.2 Introduction to the Ultra Low Frequency Voltage Withstand Test Procedure (Q/ED116501-2004 Rubber Plastic Power Cable Handover and Preventive Test Procedure)

2.3 Operation instructions for ultra-low frequency withstand voltage test

Part 3: Operating Instructions for Ultra Low Frequency Dielectric Loss Test

3.1 Why should ultra-low frequency be used for dielectric loss testing of cables

3.2 Introduction to Dielectric Loss Ultra Low Frequency Series Products

3.3 Dielectric loss ultra-low frequency General technology index

3.4 Structure and Test Wiring Method of Dielectric Loss Ultra Low Frequency Products

3.5 Operation method for ultra-low frequency dielectric loss test

3.6 How to eliminate the impact of cable surface leakage current on dielectric loss

3.7 Introduction to the program for automatically conducting ultra-low frequency dielectric loss tests according to regulations

Part 4: Operation Instructions for Partial Discharge Test

4.1 Product Features

4.2 Main technical indicators of ultra-low frequency partial discharge

4.3 Evaluation method of sample quality using local emission volume

Part 5: DC withstand voltage test

4.1 Main technical indicators

4.2 Operation method

1.Dielectric loss test voltage range: 1kV-40kV (low test voltage affects test accuracy)

2.Dielectric loss test frequency: 0.1Hz

3.Dielectric loss measurement range: 0.01 × 10-3- 655.35 × 10-3 for sizes greater than 655.35 × The value of 10-3 will be greater than 655.35 × 10-3 Reminder

4.Dielectric loss measurement accuracy: 1%

5.Dielectric loss resolution: 1x10-5

6.Capacitance measurement range: 0.001 μ F–10 μ F

7.Electrical capacity resolution: 0.001 μ F

8.Capacitance measurement accuracy 3%

9.Insulation resistance measurement range: 1MΩ -65535MΩ. For values greater than 65535MΩ, a prompt of>65535MΩ will be given (these data are located in the qualified area of the cable).

10.Insulation resistance resolution: 1M Ω

11.Insulation resistance measurement accuracy 3%

12.Voltage accuracy: 3%

13.AC current range: 0-59mA

14.AC current resolution: 0.1mA

15.AC current accuracy: 3%

16.DC current range: 0-20mA

17.DC current resolution: 1 μ A

18.DC current accuracy: 3%

19.RS232 (or USB) communication interface