Standards 

The portable partial discharge tester is designed per the following standards:

GB/T 7354-2003 Partial discharge measurement

GB 4793.1-2007 Safety requirement for electric equipment for measurement, control, and laboratory use- Part 1: General requirements,

GB/T 2423.8-1995 Environmental testing for electric and electronic products,

GB 2900 Electrotechnical terminology

GB/T 16927 High voltage testing techniques

DL/T 356-2010 Calibration specification of partial discharge measuring devices

DL/T 417-2006 Guide for Partial Discharge Measuring of Power Equipment

IEC1000 Electromagnetic compatibility

 

II.Operation Notice 

1. Read the manual carefully before operating the measuring device.

2. When use different sensors for measurement during the testing, should setup correct parameters at the “ parameter settings” to ensure the measurement accuracy.

3.  If needs to replace sensors during the testing, should turn off the “ output voltage”.

4.  During the testing, should handle the device with care, to avoid any bumps.

5.  After testing, please turn off the power and then charge the device.

III.General 

Portable PD tester is used for on-line detection and location of partial discharge of HV equipment, which is designed based on our many years experiences in the partial discharge measuring fields.

 

The system is equipped with composite TEV sensors, ultrahigh frequency sensors, High-frequency current transformers and high sensitivity ultrasonic sensors to collect partial discharge signals at high voltage equipment. The system adopts multilevel detect frequency reduction techniques to reduce the discharge frequency of the signals, meantime using high-speed AD conversion circuit to complete the signal digitization, also by using digital signal processing, adaptive filtering interference signal processing methods to ensure the reliability of the testing data. By collecting different signals produced from the partial discharge in different high equipment, the equipment operation status can be detected rapidly. The tester can be installed for detection with equipment operation and without any effect to the equipment operation. This will help the workers to make evaluation timely for the switchgear cabinet operation status, and thus greatly improve the equipment operation reliability, safety and effectiveness.

The Portable PD tester consists of main tester, PD testing software, composite TEV sensors, ultrasonic sensors, high-frequency current transformer, ultrahigh frequency sensor and connecting cables.

Tester Technical Specification

5.1 Applications 

The tester is applicable to switchgear cabinet, transformer and GIS Partial discharge online test and positioning.

5.2 Environment 

Altitude:≤3000m

Temperature:-20~60℃

Relative humidity :≤95%

5.3 Technical data 

5.3.1 Tester measurement data requirement 

(1)Composite TEV measurement

Sensor: Capacitive                        Range:0~60dBmV

Resolution:1dB;                       Error:±1dB

Detection Bandwidth:5~70MHz            Pulse/Cycle maximum:655

Threshold adjustment range:3~57dB

(2)High frequency current transformer

Detection Bandwidth:10kHz~30MHz      Signal transit mode:50Ω cable

Detection sensitivity: 10pC

(3)Ultrasonic sensor

Measurement range:-7dBμV~68 dBμV     Resolution:1dB

Error:±1dB    Sensor sensitivity:-65dB (0dB = 1volt/μbar effective value SPL)

Sensor central fequency:20~50kHz       Sensor diameter: no more than 50mm

Heterodyne frequency:38.4kHz

(4)Ultrahigh frequency sensor 

Detection bandwidth:300MHz~1.5GHz    Signal transit mode:50Ω cable

Detection sensitivity:1dB                 Gain:>65dbm

5.3.2 Hardware 

Enclosure: With protective enclosure, the protection grade is reached or better than IP53.

Connectors: Earphone port, low voltage DC charger input, external ultrasonic sensor input.

Main tester weight: no more than 3Kg.

Display: LED and with battery state indication.

5.3.3 Power Supply 

Internal battery: equipped with rechargeable battery, when the battery voltage is low the main tester will shut down itself.

Battery continuous operation time: Single channel mode is more than 6 hours, Multiple channels mode is more than 3 hours.

Battery charging: Use 220V power to charge, the charging time is no more than 8 hours.

The battery charge protection grade: IP54.

 

Maintenance

6.1 Routine Maintenance

When store or place the main tester, don’t expose the LCD display to the direct sunlight for long time.

Note: To avoid damage the main tester, don’t place the tester in fog, liquid or solvent environment.

6.2 Cleaning 

Check the main tester regularly based on the operation conditions. Clean the tester following the below procedures:

1) Use lint free cloth to remove dust from the main tester and sensors. Please be careful and don’t scratch the bright screen filter materials.

2)  Use soft cloth soaked with water to clean the main tester. For more thorough cleaning, you can use 75% isopropyl alcohol as water solvent.

Caution: Don’t use any corrosive or chemical cleaning agent to avoid any damage of the main tester or sensors.

 

Packing List

 

No.	Item	Qty
1	Main engine	1
2	Portable PD tester software	1
3	TEV sensor	1
4	Ultrasonic sensor (GIS)	1
5	Ultrasonic sensor(transformer)	1
6	High frequency current transformer	1
7	Ultrahigh frequency sensor	1
8	Coaxial Cable	2

 

From the date of purchase within one year instrument, is a product quality problem free repair replacement, lifetime supply of maintenance and technical services. The instrument has found anomalies or malfunctions please contact us to arrange the most convenient treatment options.