●Product introduction
Product name: 220kV series resonance AC withstand voltage device
Product specifications: XSN (XZ) -400kVA/400kV
Applicable test products: cables, main transformers, switches,
Test product range: 220kV/80MVA main transformer neutral point, 220kV and below voltage level switch, 35kV/240mm2 cable 1km, 110kV/300mm2 cable 0.2km, 220kV/300mm2 cable 0.08km
●Product role and function:
1. Help customers to achieve preventive AC withstand voltage test and handover AC withstand voltage test of various tested products;
2. Test cross-linked rubber-plastic power cables, power transformers, GIS, transformers, insulators, generators, switches and other test products insulation withstand various overvoltage capabilities and AC withstand voltage test for capacitive loads.
Product nicknames: series resonance withstand voltage test equipment, AC withstand voltage test equipment, inspection resonant booster device, series resonance withstand voltage tester.
Test object: 1. AC withstand voltage test of 220kV and below voltage switch, test frequency 30-300Hz, test voltage not exceeding 395kV, test time 1min.
2. AC withstand voltage test at the neutral point of 220kV/80MVA main transformer, capacitance ≤0.02uF, test frequency 45-65Hz, test voltage 160kV, test time 1min.
3. AC withstand voltage test of 1km of 35kV/240mm2 cable, electric capacity ≤0.1805uF, test frequency 30-300Hz, test voltage 52kV, test time 60min.
4. AC withstand voltage test of 110kV/300mm2 cable 0.2km, capacitance ≤0.0294uF, test frequency 30-300Hz, test voltage 128kV, test time 60min.
5. AC withstand voltage test of 220kV/300mm2 cable 0.08km, capacitance ≤0.0094uF, test frequency 30-300Hz, test voltage 216kV, test time 60min
●Technical parameters
1. Rated capacity: 400kVA;
Input power: three-phase 380V voltage, frequency 50Hz;
Rated voltage: 200kV; 400kV
Rated current: 2A; 1A
Working frequency: 30-300Hz;
Device output waveform: sine wave
Waveform distortion rate: output voltage waveform distortion rate ≤ 1%;
Working time: allow continuous 60min under rated load; overvoltage 1.1 times 1 minute;
Temperature rise: the temperature rise after 60 minutes of continuous operation under rated load is ≤65K;
Quality factor: the device itself Q≥30 (f=45Hz);
Protection function: overcurrent, overvoltage and flashover protection for the tested product (see the frequency conversion power supply section for details);
Measurement accuracy: system effective value 1.5;
2. Excitation transformer JLB-22kVA/5/10/20kV/0.4kV 1 set
Rated capacity: 22kVA;
Input voltage: 0-400V, single phase;
Output voltage: 5/10/20kV
Structure: dry type;
Weight: about 120kg;
3. Frequency conversion power supply BP-22kW/220/380V 1 unit
Rated output capacity: 22kW
Power supply: 220/380±10%V (single/three-phase), power frequency
Output voltage: 0 -400V, single phase,
Rated input current: 55A
Rated output current: 55A
Voltage resolution: 0.01kV
Voltage measurement accuracy: 1.5%
Frequency adjustment range: 30 – 300Hz
Frequency adjustment resolution: ≤0.1Hz
Frequency stability: 0.1%
Running time: continuous 60min under rated capacity
The maximum temperature of the components during continuous operation for 60min under the rated capacity is ≤65K;
Noise level: ≤50dB;
4. High-voltage reactor DK-50kVA/50kV 8 sections
Rated capacity: 50kVA;
Rated voltage: 50kV;
Rated current: 1A;
Inductance: 90H/single section;
Quality factor: Q≥30 (f=45Hz);
Structure: dry type;
Weight: about 60kg;
5. Capacitive voltage divider FY-400kV/400pF 1 set
Rated voltage: 400kV;
High voltage capacity: 400pF
Dielectric loss: tgσ≤0.5%;
Partial pressure ratio: 5000:1
Measurement accuracy: effective value 1.5;
Weight: about 40kg;
