●Product introduction
Product name: 35kV transformer without partial discharge series resonance
Product specifications: XSN (XZ) 50kW—no partial discharge frequency conversion power supply
Applicable test product: Transformer
Test product range: 35kV and below voltage level power transformer capacity is not more than 63MVA, partial discharge and induction withstand voltage test power supply system
●Product function and function:
①Help customers to achieve preventive AC withstand voltage test and handover AC withstand voltage test of various tested products;
②Test cross-linked rubber and plastic power cables, power transformers, GIS, transformers, insulators, generators AC withstand voltage test of insulation withstand various overvoltages and capacitive loads of the tested product such as switches.
Product nicknames: series resonance withstand voltage test equipment, AC withstand voltage test equipment, inspection resonant booster device, series resonance withstand voltage tester
Test object: The capacity of power transformer of 35kV and below voltage level is not more than 63MVA, and the power supply system for partial discharge and induction withstand voltage test. The low-voltage side voltage of the tested product is designed according to the specifications of 10kV and below.
●Technical parameters
No partial discharge resonance console:
Model: CZT(W)-50;
Power supply voltage and frequency: three-phase 380V±15%; 50Hz (the partial discharge interference level of the power supply is less than 20pC);
Power supply capacity: greater than 60kVA
Rated output power: 50kW (maximum output active power);
Rated output voltage: 0～350V, continuously adjustable;
Rated output current: 143A;
Output phase number: single phase;
Output waveform: pure sine wave;
Output waveform distortion rate: ≤1.0%;
Output voltage instability: ≤1.0%;
Cooling method: forced air cooling;
Adjustable frequency range: 20Hz～300Hz;
Output frequency resolution: 0.1Hz;
Output frequency instability: ≤0.5%;
Noise level: ≤80dB;
Partial discharge capacity: <5pC;
Allowable running time: Allowable running time under rated capacity ≥ 1 hour;
Allowable temperature rise: under rated load, continuous work for 180min, temperature rise of air outlet ≤45K;
Without partial discharge excitation transformer:
Model: JLB(W)-100;
Rated capacity: 50kVA;
Number of phases: single phase
Low-voltage winding phase voltage: 2×350V; 2×400V; 2×450V;
Low voltage rated current: 143A;
Rated voltage of high-voltage winding: 2×10kV; 2×6.3kV; high-voltage winding is composed of two independent windings, which can be connected in parallel for partial discharge test of 6.3kV transformer on the low-voltage side;
When connecting in series, perform a partial discharge test of a 10kV transformer on the low-voltage side.
Insulation level: induced voltage 1.2 times 1min;
Rated frequency: 50～300Hz;
Partial discharge capacity: Partial discharge capacity under rated voltage ≤10pC;
Impedance voltage: ≤5%;
Noise level: ≤65dB;
Rated temperature rise: winding temperature rise is less than 65K;
Allowed continuous operation time: 60min continuous operation under rated voltage and rated current;
Compensating reactor without partial discharge:
Model: DK(W)-90／15
Rated voltage: 15kV;
Rated current: 6A／60min
Inductance value: 4H;
Rated capacity: 90kVA;
Frequency of use: 100～300Hz;
Non-linearity of inductance value: ≤1%;
Insulation level: the reactor should be able to withstand a working voltage 1.2 times its rated voltage without flashover or breakdown for 1 min;
Partial discharge capacity at rated voltage: <10pC;
Allowable continuous operation time: 60min continuous operation under rated voltage and rated current;
Without partial discharge divider:
Model: FY (W)-500/60;
Rated voltage: 60kV;
Electric capacity: C1=500pF;
Working frequency: 30～300Hz;
System measurement error: ≤2.0%;
Insulation level: 66kV/1min;
Dielectric loss: ≤0.2%;
Structure: C1 is a capacitor with an epoxy cylinder shell and oil paper insulation structure;
C2 uses materials with the same temperature coefficient and frequency coefficient as C1.
Partial discharge capacity: ≤10pC;
