Product Introduction:
The High-Efficiency Transformer Partial Discharge Tester is developed based on the advanced theories in the field of partial discharge instruments both domestically and internationally, adopting advanced technology and circuits, and has been continuously improved through extensive trials by users in various regions. It retains the advantages and functions of previous generations while being more refined 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) Operating modes: Ellipse — Expansion — Line
(4) High-frequency time base ellipse can be adjusted to normal size according to input voltage (10～250V), with power consumption <1 VA and automatic overload protection
4. Display unit
Uses a 124×104mm2 rectangular oscilloscope tube with brightness and focus adjustment knobs
5. Amplifier
(1) 3dB low-frequency cutoff fL: 10, 20, 40kHz selectable
(2) 3dB high-frequency cutoff fH: 80, 200, 300kHz selectable
(3) Gain adjustment: coarse adjustment in 6 steps, with 20±1dB difference between steps, 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 analog meter 0—100 error ±5% (of full scale)
(2) Logarithmic scale analog meter 0—10—100 error ±5% (of full scale)
(3) Digital meter: 3.5-digit LED display 0—100 error: ±3% (of 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 marker system
(1) The zero marker of the internal zero generator can change polarity and rotate 0～180° to match the polarity of the true zero marker produced by the voltage resistor R
(2) Zero marker is synchronized with all elliptical scanning frequencies
10. Structure
(1) Dimensions: 530×550×220mm3
(2) Weight: approx. 22kg
Note: The above information and technical parameters are compiled and released by Yangzhou DARUI Electric Co., Ltd.
