Small Volume Partial Discharge Test Equipment / Partial Discharge Measurement Equipment

Partial Discharge Detecting Tester , PD Detecting Instrument , Impulse Current Method PD Tester

1.Product introduction:

Due to manufacturing or installation defects, discharge occurs in the insulated portion of the live cable end (joint) until insulation breakdown damage occurs, and even a fire or explosion at uncertain defects may occur. Therefore, how to find the hidden troubles before the accident is the key to solve the problem, which makes the discharge detection necessary for power equipments.

The model JF2002 is a kind of impulse current method partial discharge inspection instrument  It has the feature of small volume, excellent performance and easy operation. 

II.Main Components:

III. Detecting principle figure

Note : The PD free test transformer set (power frequency voltage withstand test set) rises the target testing voltage to tested object (such as power transformer ,CB, bushing, CT,PT ,discloser and so on )which PD detecting needed , the coupling terminals of voltage divider will has some PD coupling signal to the PD detecting tester JF 2002, then get the PD level from the tested object.

VI. Technical Parameters of PD tester JF2002

1.Keywords: time base frequency ,Display, Change with measurement fuctions

• Time base frequecny: 50,100,150,200,400Hz power supply : 50HZ 220V
• Display: Ellipse---Expand---Beeline
• Change with measurement fuctions

2.Integrated design, covering 10kHz~300kHz, Meet IEC60270 standard.

3.Capacitance range of measured object: 6pF~250uF

   Measuring sensitivity and Max. Current as the table

4.Time base of ellipse scan:

• Frequency 50/60(inner), 100,150,200,400Hz
• Turn:30°per grade, total 360°
• Display ways:Ellipse---Expand---Beeline
• The high frequency time base ellipse can be adjusted to normal state by input voltage (10~250V), and the power is less than 1VA. Auto-protecting function when overload

5.Displaying Unit:

A reactangle oscillograph tube(124×104mm²), which has brightness and focus knobs

6.Amplifier :

• On low frequency 3dB, f_L: 10,20,40kHz optional
• On high frequecny 3dB, f_H: 80,200,300kHz optional
• Gain adjusting: 6 grades of gross adjustment. Gain difference between grades is 20+ 1dB,fine adjusting range ＞20dB
• Asymmetry of plus and minus pulse responding ＜1dB

7.Time window

• Adjustable window width,15°~150°on 50/60Hz
• Rotatable window position, 0°~170°
• Two windows can on/off respectively or simultaneously
• Bombarding device, 20mS time to taking pictures

8.Pulse peak meter

• Pointer meter with linear scale, 0~100 deviation + 5%(with full scale)
• Pointer meter with logarithm scale, 0~10~100 deviation + 5%(with full scale)
• Pointer meter with 3.5bits LED digital display, 0~100 deviation + 3%(with full scale)

9.Measuring voltmeter

• Measuring range :100KV(with 100KV voltmeter resistance R)
• Display :3.5bits LED digital , deviation + 3%

10.Zero mark system

• Made by inner zero mark generator, it can change polarity and rotate 0~180°,so it can correspond with the true zero mark, which is made by high voltage resistor.
• The zero mark is corresponded with all ellipse scan frequecny.

11. Dimension : 530×550×220mm weight :22kg

VII. Optional model

• Model JF 2002      :  PD test channel      one channels
• Model JF 2003      :  PD test channel      three channels
• Model JF 2004      :  PD test channel      four channels

VIII. Optional matched other test set

• PD detecting AC high voltage generating systems  :  CQSB series PD free power frequency test transformer systems
• PD signal coupling unit                                            :  Coupling voltage divider  or standard coupling capacitor , no corona type