Digital High-Precision Partial Discharge Detector  

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Product Introduction

Brand	None	Origin	Domestic
Custom Processing	Yes

The digital high-precision partial discharge detector generates electromagnetic waves, which create 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, such as this partial discharge detector, can be used for detection.

Detailed Introduction

Product Introduction:

 It is based on advanced theories in the field of partial discharge detector research both domestically and internationally, adopting advanced technology and circuits, and has been continuously improved through extensive user trials. 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:

1. 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) Frequency: 50 (internal), 100, 150, 200, 400Hz

(2) Rotation: in 30° steps, rotatable 360°

(3) Operating modes: Ellipse — Expand — 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) Low-frequency cutoff (3dB) fL: 10, 20, 40kHz selectable

(2) High-frequency cutoff (3dB) 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 pointer meter 0—100  error ±5% (full scale)

(2) Logarithmic scale pointer 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 Mark System

(1) The zero mark of the internal zero mark 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.