1.1 Brief Introduction
The digital partial discharge detector features a compact all-in-one design for easy operation. It is suitable for type testing, factory acceptance testing, and handover testing of high-voltage products, enabling quantitative measurement of partial discharges in motors, current transformers, cables, insulating bushings, capacitors, transformers, surge arresters, switches, and other high-voltage electrical equipment. Compliant with IEC 60270 and GB/T 7354-2018 standards, this instrument can measure and record partial discharges (PD) as well as AC test voltages.
1.2 Qualification
Partial discharge measurement system
Number of partial discharge measurement channels 4 channel
input impedence 50Ω
Simulation Filter (-6 dB)
- Complies with IEC 60270 and GB/T 7354-2018 standards
- Lower limit frequency fL: available as 10 kHz, 20 kHz, 40 kHz, 60 kHz, or 80 kHz
- Upper frequency (fU): 100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, or 1 MHz (optional)
detection sensitivity
- <1pC(CA=10nF/CK=1nF)
- <0.1pC(CA=1nF/CK=1nF)
measuring range 0.01pC-10000nC
Sampling Precision 14bit
sampling rate 100MHz
Gain adjustment range Adjustable automatically or manually at 60 dB, 40 dB, 20 dB, 0 dB, -20 dB, and-40 dB.
Test sample's capacitance range 6pF~250μF
linearity error <±3%
Voltage Measurement System
Voltage Input Range 5~230VAC (RMS)
linearity error <±3%
frequency range 10~450Hz
synchronous mode Automatic switching between power synchronization and voltage input synchronization
Synchronization Accuracy <1°
Interface
Bare Metal Input 4×BNC
Voltage Input 1 × Aviation plug
communication interface 1×RJ45 1×RS232
Host Parameters
operating system Linux Operating System
memory 8G and above
show 13.3-inch true-color TFT capacitive LCD touchscreen
resolution ratio 1920x1080
source 176~264 VAC,50/60Hz
Power Supply Insurance 250V T 5A
service temperature -10°C~50°C
storage temperature -40°C ~60°C
relative humidity 5% to 95%, without condensation
External Dimensions 445 mm × 458 mm × 236 mm (width × depth × height)
Body weight 11.7kg
1.3 Supplies List
The following is the standard configuration list for a single host (actual configuration shall refer to the shipping list) Table 21: Supply List
| order number |
Component Name |
quantity |
remarks |
| 1 |
Detection Host |
1 unit |
|
| 2 |
user's manual |
1 copy |
|
| 3 |
Host Ground Wire |
1 Item |
|
| 4 |
220V power cord |
1 Item |
|
| 6 |
50-euro PD signal coaxial cable |
4 items |
|
| 7 |
Voltage Synchronization |
1 Item |
|
| 8 |
Divided-voltage impedance measurement |
1 |
|
| 9 |
measured impedance |
3 |
|
| 10 |
Special coupling capacitor signal connection line for impedance measurement |
4 items |
|
| 11 |
Special shorting cable for impedance measurement, black |
4 items |
|
| 12 |
Specialized impedance grounding wire, black |
4 items |
|
| 13 |
Calibration Pulse Generator |
1 |
|
| 14 |
Special signal line for the calibration pulse generator – black |
1 Item |
|
| 15 |
The dedicated signal line for the calibration pulse generator is red. |
1 Item |
|
| 16 |
Calibration Pulse Generator Charger |
1 |
|
| 17 |
Move USB Drive |
1 |
|
| 18 |
Factory Inspection Report |
1 copy |
2 Testing System
2.1 System Survey
The partial discharge testing system is a data acquisition and analysis tool designed to detect, record, and analyze partial discharge events, with applications spanning various fields. It is suitable for type tests, factory acceptance tests, and handover tests of high-voltage products, enabling quantitative measurement of partial discharges in motors, transformers, cables, bushings, capacitors, surge arresters, switches, and other high-voltage electrical equipment—ideal for both laboratory use and field measurements. Figure 41: Wiring diagram of the test system
2.2 Hardware System
2.2.1 Front Panel
Figure 42: Front Panel Preview1
- mains switch
- USB Interface
- Liquid Crystal Display Interface
- LED pilot lamp
2.2.1.1 LED pilot lamp
When powered on, the LED (operation) flashes red. When setting host parameters, the communication indicator light flashes. The LED (fault) indicator remains off under normal conditions; it turns red when a main unit fault occurs.
2.2.2 Back Panel
Figure 43: Rear Panel Preview2
- Power socket (with fuse)
- Voltage input port, 2-core aviation plug
- Communication interfaces: RJ45 x1, RS232 x1
- Bureau of Distribution Input Interface, 4 x BNC
- System Grounding
- radiator fan
2.2.2.1 Power Input
The power input uses a socket equipped with a power protection drawer, and the main unit's packaging box includes a replaceable 250V T5A fuse.
