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Product Introduction
| Brand |
None |
Origin |
Domestic |
| Custom Processing |
Yes |
The digital high-precision partial discharge detector generates electromagnetic waves, which produce a transient ground voltage signal when propagating outward. The magnitude of this signal is directly related to the intensity of partial discharge and the distance to the discharge point. A dedicated detector, known as a partial discharge detector, can be used for detection.
Detailed Introduction
Product Overview:
It is developed based on advanced theories in the field of partial discharge instruments both domestically and internationally, utilizing advanced technology and circuits, and has been continuously improved through extensive trials by users in various regions. While retaining the advantages and functions of previous generations, it is more refined in design, more convenient in use, and more reliable in performance.
Technical Specifications:
I. Main Unit Parameters
1. Capacitance range of test objects: 6pF~250µF
2. Detection sensitivity and allowable current (see Table 1)
3. Elliptical scanning time base
(1) Frequencies: 50 (internal), 100, 150, 200, 400Hz
(2) Rotation: in 30° increments, rotatable 360°
(3) Operating modes: Ellipse — Expanded — Linear
(4) The high-frequency time base ellipse can be adjusted to normal size according to the 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: selectable 10, 20, 40kHz
(2) 3dB high-frequency cutoff fH: selectable 80, 200, 300kHz
(3) Gain adjustment: coarse adjustment in 6 steps, with gain difference of 20±1dB 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% (full scale)
(2) Logarithmic scale analog meter 0—10—100 error ±5% (full scale)
(3) Digital meter: 3.5-digit LED display 0—100 error: ±3% (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 from the internal zero generator can change polarity and rotate 0～180° to match the polarity of the true zero mark produced 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: approximately 22kg
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
