Product Introduction:
The partial discharge tester is based on the advanced theories in the field of partial discharge research at home and abroad，and adopts advanced technology and circuits. It has been continuously improved through extensive trial use by users in various places. While retaining the advantages and functions of previous generations, it is more complete in design, more convenient in use, and more reliable in performance.
Technical Specifications:
I. Main Unit Parameters
1. Capacitance range of test object: 6pF~250µF
2. Detection sensitivity and allowable current (see Table 1)
3. Elliptical scanning time base
(1) Frequency: 50 (internal), 100, 150, 200, 400Hz
(2) Rotation: in steps of 30°, rotatable 360°
(3) Working method: ellipse — expansion — straight line
(4) High-frequency time base ellipse can be adjusted to normal size according to input voltage (10~250V), its power consumption <1 volt-ampere, and has overload automatic protection device
4. Display unit
Uses 124×104mm2 rectangular oscilloscope tube, with brightness and focus adjustment knobs
5. Amplifier
(1) 3dB low-frequency cutoff fL: 10, 20, 40kHz optional
(2) 3dB high-frequency cutoff fH: 80, 200, 300kHz optional
(3) Gain adjustment: coarse adjustment 6 gears, gain difference between gears 20±1dB, fine adjustment range >20dB
(4) Asymmetry of positive and negative pulse response <1dB
6. Time window
(1) Window width: adjustable, 15° ~ 150° at 50Hz
(2) Window position: each window can be rotated 0° ~ 170°
(3) Two time windows can be opened separately or simultaneously
7. Pulse peak meter
(1) Linear scale pointer meter 0—100, error ±5% (based on full scale)
(2) Logarithmic scale pointer meter 0—10—100, error ±5% (based on full scale)
(3) Digital meter: 3.5-digit LED digital display 0—100, error: ±3% (based on full scale)
8. Test voltage meter
(1) Range 100kV (using 100kV voltage divider resistor R)
(2) Display: 3.5-digit digital voltmeter
(3) Error: ±3%
9. Zero marking system
(1) The zero mark of the internal zero generator can change polarity and can be rotated 0~180° to match the polarity of the true zero mark generated by the voltage divider resistor R
(2) Zero mark is synchronized with all elliptical scanning frequencies
10. Structure
(1) Dimensions: 530×550×220mm3
(2) Weight: approx. 22kg
II. Pulse Generator Parameters
1. Output charge levels: 5pC, 10pC, 20pC, 50pC
2. Polarity: alternating positive and negative
3. Repetition frequency: 1.2kHz
4. Frequency variation range: >±100Hz
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Digital High-Precision Partial Discharge Detector - Yangzhou Darui
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