●Product introduction
Product name: 110kV series resonance AC withstand voltage device
Product specifications: XSN (XZ) -540kVA/270kV
Applicable test products: cables, main transformers, switches, GIS
Test product range: 110kV switch, GIS, 110kV/63MVA main transformer fully insulated, 110kV/630mm² length 0.6km, 35kV/300mm² length 2.5km, 10kV/300mm² length 5km
●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, resonant booster device for inspection, series resonance withstand voltage tester.
Test object: AC withstand voltage test of 110kV/630mm² cable with a length of 0.6km, capacitance ≤0.121uF, test frequency 30-300Hz, test voltage 128kV, test time 60min.
AC withstand voltage test of 35kV/300mm² cable with a length of 2.5km, capacitance ≤0.486uF, test frequency 30-300Hz, test voltage 52kV, test time 60min.
AC withstand voltage test of 10kV/300mm² cable with a length of 5km, capacitance ≤1.88uF, test frequency 30-300Hz, test voltage 22kV, test time 5min.
AC withstand voltage test of 110kV/63MVA main transformer full insulation, capacitance ≤0.02uF, test frequency 45-65Hz, test voltage not exceeding 160kV, test time 1min.
AC withstand voltage test of 110kV switch and GIS, the test frequency is 30-300Hz, the test voltage does not exceed 265kV, and the test time is 1min.
●Technical parameters
1. Product core parameters
Rated capacity: 540kVA;
Input power: three-phase 380V voltage, frequency 50Hz;
Rated voltage: 270kV; 135kV; 90kV;
Rated current: 2A; 4A; 6A;
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-30kVA/4/8/16kV/0.4kV 1 set
Rated capacity: 30kVA;
Input voltage: 0-400V, single phase;
Output voltage: 4/8/16kV
Structure: dry type;
Weight: about 120kg
3. Inverter power supply BP-30kW/220/380V 1 unit
Rated output capacity: 30kW
Working power supply: 220/380±10%V (single/three-phase), power frequency
Output voltage: 0-400V, single phase,
Rated input current: 75A
Rated output current: 75A
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(G)-90kVA/45kV Section 6
Rated capacity: 90kVA;
Rated voltage: 45kV;
Rated current: 2A;
Inductance: 80H/single cell;
Quality factor: Q≥30 (f=45Hz);
Structure: dry type;
Weight: about 90kg;
5. Capacitor voltage divider FY-270kV/1000pF 1 set
Rated voltage: 270kV;
High voltage capacity: 1000pF
Dielectric loss: tgσ≤0.5%;
Partial pressure ratio: 3000:1
Measurement accuracy: effective value 1.5;
Weight: about 26kg
