GDJF-2008 Partial Discharge Detector
Product Description
GDJF-2008 Partial Discharge Detector is measuring partial discharge for the products such as transformers, mutual inductors, HV switches, zinc monoxide arresters and power cables. It also can make type tests and monitor insulation operation.
This type has the advantages of high sensitivity, wide range of capacitance, being well equipped for input unit impedance detecting and more variants of frequency bands ( 9 in all). After proper setting, the discharge impulse amount can be read directly. The indicating and digital meters are shown simultaneously.
This detector is widely applied in power stations, manufacturers and institutions.
Features
1. Ambient temperature: 0-40ºC±2ºC
2. Relative humidity: ≤80%
3. Power supply: 220V±10%, 50HZ
4. No violent vibration and mechanical shock
5. The device should be placed in the environment with no dust and corrosive, good ventilation. It should not be interfered by strong electromagnetic.
6. Earthing requirements: earthing resistance <1Ω
Specifications
Capacitance range to be tested6PF-250μF
Testing sensitivity (shown in Table.1)
| Input unit No. |
Tuning capacitance |
Unit |
Sensitivity(pC)
(Unsymmetrical circuit) |
| 1 |
6-25-100 |
pF |
0.02 |
| 2 |
25-100-400 |
pF |
0.04 |
| 3 |
100-400-1500 |
pF |
0.06 |
| 4 |
400-1500-6000 |
pF |
0.1 |
| 5 |
1500-6000-25000 |
pF |
0.2 |
| 6 |
0.006-0.025-0.1 |
uF |
0.3 |
| 7 |
0.025-0.1-0.4 |
uF |
0.5 |
| 8 |
0.1-0.4-1.5 |
uF |
1 |
| 9 |
0.4-1.5-6.0 |
uF |
1.5 |
| 10 |
1.5-6.0-25 |
uF |
2.5 |
| 11 |
6.0-2.5-60 |
uF |
5 |
| 12 |
25-60-250 |
uF |
10 |
| 7R |
Resistance |
|
0.5 |
Amplifier band
Low terminal: 10KHZ, 20 KHZ, 40 KHZ (optional)
High terminal: 80 KHZ, 200 KHZ, 300 KHZ (optional)
Amplifier gain adjustment
Coarse control - there are 6 steps for coarse tuning, the gain of each step is 20±1db
Fine control ≥ 20 db
Time windows
Width of window, adjustable 15o-150o
Window position, adjustable 0o-170o
Two windows can be opened simultaneously or separately.
Discharge meter
Digital display
PD display: LED 3½ digits
0-100.0 Error <±5% (full scale)
Ellipse time base
Frequency: 50Hz,100Hz,150Hz, 200Hz,400Hz
Elliptic display color is yellow
Elliptic rotation: each step is 30°, 120 ° rotation can be made.
Display: ellipse - straight line
Enable to adjust high-frequency time base ellipse to normal size according to input voltage (13-275V)., intake power < 1 VA.
Waveform lock
Lock required waveform of any time to facilitate observation and analysis
Testing Voltage meter
Range: 100KV (Can be expanded)
Display by 3½ digital voltage meter
Accuracy: better than ±5% (full scale)
Inside, outside the zero mark function
Dimensions: 450×450×190 mm
Working Principle
Panel Instruction
The front panel and back panel is shown as Figure 2 and Figure 3.
- Color LCD screen
- 31/2 digital meter display for reading of discharge value
- 31/2 digital meter display for reading of testing voltage
- Ellipses rotate
- Industrial frequency (50Hz), high-frequency time base choice
- Window position control
- Amplifier coarse tuning
- Elliptical and linear conversion
- Waveform lock
- Window width adjustment
- Amplifier fine tuning
- Inside and outside the zero mark on and off
- Left window on or off
- Right window on or off
- Low frequency band selection(10,20,40kHz )
- High frequencies choice(80,200,300kHz )
- Power switch
18. Power outlet
19. 220V Fuse
20. 20V Fuse
21. 20V Fuse
22. High frequency socket
23. High frequency fuse
24. Ground Terminal
25. VGA interface (external display)
26. Test voltage fine-tuning
27. Test voltage input
28. Signal input
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