●Product introduction
Product name: 220kV transformer without partial discharge series resonance
Product specifications: XSN (XZ)-300kW without partial discharge frequency conversion power supply
Applicable test product: Transformer
Scope of tested products: Meet the partial discharge and induction withstand voltage test of transformers with voltage levels of 220kV and below
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: Meet the partial discharge and induction withstand voltage test of 220kV and below transformers. Partial discharge and induction withstand voltage test of transformers with a capacity of 180MVA and below.
●Technical parameters
No partial discharge resonance console:
Model: CZT (W)-300;
Maximum output power: 300kW (active power);
Input power: three-phase AC380V+15％50Hz;
Rated output voltage: single-phase 0～350V adjustable;
The output voltage waveform is sine wave, and the total harmonic THD% is less than 1%;
Output voltage instability: <1% (input voltage instability is less than 2% in five minutes)
Rated output current: 857A;
Output frequency range: 20～300Hz;
Frequency adjustment sensitivity: ≤0.1Hz;
Frequency instability: ≤0.05%;
Working mode: Variable frequency power supply. Allowable running time: 180min allowed to run under rated output power;
Allowable temperature rise: under rated load, continuous work for 180min, temperature rise of air outlet ≤45K;
Noise level: ≤85dB;
Cooling method: forced air cooling;
Weight: 1500kg;
Appearance size: 1800×800×1800mm (length×width×height);
Occupied test site area: 3×3m, the test site is best outdoors. When indoors, the height of the test site is greater than 4m, and the ventilation is smooth.
Without partial discharge excitation transformer:
Model: JLB(W)-300;
Rated capacity: 300kVA;
Rated voltage of low voltage winding: 300, 350, 400V;
Maximum input current on the low-voltage side: 857A;
Rated voltage of high voltage winding: 2×15kV; 2×35kV;
Insulation level: low voltage winding to ground: 5kV/1min;
High voltage winding to ground: 1.2U0/1min;
Rated frequency: 45～300Hz;
Partial discharge capacity: ≤10pC;
Impedance voltage: ≤5%;
Noise level: ≤65dB;
Cooling method: ONAN;
Rated temperature rise (180min rated operation): winding temperature rise is less than 65K, top oil temperature rise is less than 45K;
Allowed continuous operation time: 180min continuous operation under rated voltage and rated current;
Compensation reactor without partial discharge (single unit):
Model: DK (W)-400/40;
Rated voltage: 20kV;
Inductance: 6H (±10%);
Rated current: 5A;
Design rated frequency: 120Hz;
Partial discharge capacity under rated voltage: ≤10pC;
Continuous working time: 90min continuous working under rated current;
Insulation level: 1.2Un/1min;
Temperature rise: ≤65K;
Weight: 0.3T;
Dimensions: Φ892/Φ730×760 (mm);
Without partial discharge divider:
Model: FY (W)-300/60;
Rated voltage: 60kV;
Electric capacity: C1=300pF;
Working frequency: 30～300Hz;
System measurement error: ≤1.0%;
Insulation level: 66kV/1min;
Dielectric loss: ≤0.2%;
Structure: C1 is a capacitor with epoxy cylinder shell and oil-paper insulation structure;
Measurement system: Adopt dedicated intelligent peak meter 4 1/2 digit large-screen LCD display, the main display is peak value/√2 and waveform, in addition to true effective value, peak/peak value, average value, scale factor.
Sampling method: single-chip AC sampling point by point, 16-bit high-speed industrial-grade A/D conversion.
The transformation ratio of the low-voltage arm is: 1000:1;
The overall partial discharge capacity of the voltage divider: ≤10pC;
Pressure equalizing ring: aluminum alloy material, easy to disassemble and assemble, with packing box for easy transportation.
The voltage divider is equipped with an intelligent peak meter, which can carry out measurement transmission and is convenient for calibration.
Dimensions: Ф80×800mm
Weight: 9kg
