●Product introduction
Product specifications: XSN (XZ) -270kVA/270kV (frequency conversion)
Applicable test products: busbar switch, substation system, main transformer, cable
The scope of tested products: 110kV and below voltage level switches, GIS (7 bays) and other substation equipment, 110kV/63000kVA main transformer fully insulated AC withstand voltage test
●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: 1. AC withstand voltage test of 110kV and below voltage level switches, GIS (7 intervals) and other substation equipment, test frequency 30-300Hz, test voltage not exceeding 265kV, test time 1min.
2. AC withstand voltage test of 110kV/63000kVA main transformer full insulation, capacitance ≤0.02uF, test frequency 45-65Hz, test voltage not exceeding 160kV, test time 1min.
3. AC withstand voltage test of 1km of 35kV/300mm2 cable, capacitance ≤0.1945uF, test frequency 30-300Hz, test voltage not exceeding 52kV, test time 60min.
4. AC withstand voltage test of 110kV/300mm2 cable 0.2km, capacitance ≤0.029uF, test frequency 30-300Hz, test voltage not exceeding 128kV, test time 60min.
5. AC withstand voltage test of 10kV/300mm2 cable 3km, capacitance≤1.1265uF, test frequency 30-300Hz, test voltage not exceeding 22kV, test time 5min.
●Technical parameters
1. Product core parameters:
Rated capacity: 270kVA;
Input power: single-phase 220 or three-phase 380V voltage, frequency is 50Hz;
Rated voltage: 90kV; 135kV; 270kV;
Rated current: 3A; 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 test product 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-15kVA/4/8/16kV/0.4kV 1 set
Rated capacity: 15kVA;
Input voltage: 0-400V, single phase;
Output voltage: 4/8/16kV
Structure: dry type;
Weight: about 58kg;
3. Inverter power supply BP-15kW/220/380V 1 unit
Rated output capacity: 15kW
Working power supply: 220/380±10%V (single/three-phase), power frequency
Output voltage: 0 -400V, single phase,
Rated input current: 37.5A
Rated output current: 37.5A
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)-45kVA/45kV Section 6
Rated capacity: 45kVA;
Rated voltage: 45kV;
Rated current: 1A;
Inductance: 110H/single section;
Quality factor: Q≥30 (f=45Hz);
Structure: dry type;
Weight: about 45kg;
5. Capacitor voltage divider FY-270kV/500pF 1 set
Rated voltage: 270kV;
High voltage capacity: 500pF
Dielectric loss: tgσ≤0.5%;
Partial pressure ratio: 3000:1
Measurement accuracy: effective value 1.5;
Weight: about 26kg
