270KVA Portable AC Resonant Test System Overvoltage Protection

AC Resonant Test System for 35KV Cable and 110KV Power Substation Test

Features:

• Small size, portable for operating.
• Screen to show the test data, status and display operation step by real-time.
• Small temperature rising at rated load. Dry-type epoxy cast, high mechanical strength and good insulation ability.
• 220V or 380V single phase power source is suitable for on-site sourcing.
• Different type reactors for optional realize the multipurpose.
• With over current, over voltage, IPM and discharge protection function.
• Test result can be printed.

I. Product Usage :

This test set model CHX-270KVA/45KV, 270KV is designed for 10KV / 35KV class short XLPE cable ,power transformer, CB,CT/PT, busbar in 110KV power substation to perform on-site AC withstand voltage test with variable frequency resonant circuit technology; the highest test voltage is no more than 45KV ,90KV,270KV; test frequency: 30-300Hz; the duty cycle is no more than 60mints. it can help customers to perform preventive test or hand-over test on AC withstand voltage test

Test range of the set is as following:transformer

1. 1000m of 35kV/300mm2 cable, test frequency 30-300Hz, test voltage 52kV, test time 5min.

2, 3000m of 10kV/300mm2 cable , test frequency 30-300Hz, test voltage 22kV, test time 5min.

3, 35kV/31500kVA main transformer , capacitance ≤ 0.015uF, test frequency 40-300Hz, test voltage 68kV, test time 1min.

4, 110kV/50000kVA main transformer , capacitance ≤ 0.015uF, test frequency 40-300Hz, test voltage 160kV, test time 1min.

4, CB,CT/PT, busbar in 110KV power substation , test frequency 40-300Hz, test voltage no more than 265, test time 1min.

The whole test set consists of variable frequency power source , excitation transformer , 6pieces of reactors, and high voltage measurement devider(capacitive voltage divider). This type of test set is most suitable for 35KV or 110KV power sub-station

II. General Technical Data

1. Rated capacity: 270kVA;
2. Input power: three-phase 380V voltage, frequency is 50Hz;
3. Rated voltage: 45KV; 270kV;
4. Rated current: 1A; 6A;
5. Working frequency: 30-300Hz;
6. Device output waveform: sine wave
7. Waveform distortion rate: output voltage waveform distortion rate ≤ 1%;
8. Working time: continuous 60min allowed under rated load; overpressure 1.1 times 1 minute;
9. Temperature rise: temperature rise ≤65K after continuous operation for 60 minutes under rated load;
10. Quality factor: device itself Q≥30 (f=45Hz);
11. Protection function: Over-current, over-voltage and test product flashover protection for the tested product (see the variable frequency power supply section for details);
12. Measurement accuracy: system effective value 1.5;

III. Main Components: