• Standard integrated industrial computer and programmable controller PLC automatic control.

• With the integrated software design, the withstand voltage test and partial discharge monitoring are integrated into a unified operation interface. The simultaneous display of dual data is more convenient and facilitates the accurate capture of key status information.

• High voltage, high current, low voltage, and low current are collected synchronously and isolated, using high-precision sensors and high-performance acquisition chips.

• Supports stage boosting, and can set the voltage value of each stage arbitrarily, which is convenient for discovering test product problems.

• The human-machine interface uses wireless mouse and keyboard operation, intelligent working process, and can choose automatic mode and manual mode.

• Independent interface displays high voltage, high voltage current, low voltage, low voltage current, time and withstand voltage results, high voltage curve dynamic display, intuitive and clear display.

• Perfect overvoltage, overcurrent protection, and flashover protection, self-setting output voltage, high-voltage current upper limit, and timing time. Low-voltage current protection (hardware has been set).

• During the test phase, you can select the saved test item parameters or reset the parameters.

• It has a zero return detection function. The test can only be carried out after it returns to zero automatically, which is safe and reliable.

•Approximate voltage regulation algorithm, automatically withstands voltage timing after reaching the set voltage, and automatically reduces voltage to zero after timing ends.

• When the set low voltage current is exceeded, the voltage output is automatically cut off and the voltage is reduced to zero; when the set high voltage current is exceeded, the voltage is automatically reduced to zero for protection.

• During the process of program-controlled voltage rise and fall, the voltage and partial discharge are stored synchronously in real time.

• The history record function enables the access, playback and output of complete graphs and data parameters during the test.

• During the test, the PRPD graph (real-time graph and cumulative graph) and U-T curve and other monitoring interfaces can be viewed, and the data dynamics are clear at a glance, which is convenient for users to view.

• The system supports one-click report export function and supports custom formats to meet diverse needs.

•After the test, the equipment will automatically discharge, effectively eliminate residual charge, and fully ensure operational safety.

• Software and hardware anti-interference design, multiple anti-interference means, adapt to harsh electromagnetic environment.

 

1.GDYD-A  Hipot Test Control Unit

•Input voltage: single-phase AC380V±10% 50Hz±1

•Output voltage: 0-400V

• Output current: 0-25A

• Output capacity: 100kVA

• Timing range: 0-999S•

• Ambient temperature: -20℃ to 50℃

•Voltage accuracy: ≤3% (10%-100% F.S)

• Current accuracy: ≤3% (10%-100% F.S)

•The insulation resistance of the equipment casing to ground is >2MΩ, and the leakage current is <3.5mA.

• Connection ports: USB, RJ45

•Emergency start/stop button

 

2.YDQW-10kVA/100kV PD-free Gas Type Transformer   

YDQW series gas-filled non-partial discharge transformer uses sulfur hexafluoride (SF6) gas as the insulating medium.

It is a replacement product of oil-immersed light test transformer with good arc extinguishing performance. It can be widely used for on-site detection of insulation performance of various high-voltage electrical equipment by power system users. It is especially suitable for use in the wild and plateau mountainous areas. The use of SF6 gas insulation and special structure and precision technology can control its partial discharge within a small range. The shape and process are of high precision. It is suitable for on-site and laboratory use. Convenient and applicable. It is lighter than oil-immersed transformers, small in size, and easy to move. 

•Phase number: single phase

• Frequency: 50Hz

•Rated input voltage: 400V

•Rated input current: 25A

•Rated output voltage: 100kV

• Rated output current: 100mA

•Rated output capacity: 10kVA

•Measurement winding voltage ratio: 1000:1

•System partial discharge at rated voltage ≤10pC

 

3.TAWF-300pF/100kV   Coupling Capacitor

•Rated voltage: 100kV

•Nominal capacitance: 300pF

• Dielectric loss: ≤0.4%

• Insulation level: No abnormality for 1min at 110% rated voltage.

• Nominal voltage divider ratio: 1000:1

• Partial discharge: ≤10pC at 100% rated voltage, ≤5pC at 80% rated voltage

•Structural type: Insulated shell oil-paper capacitor structure. It consists of top cover, grading ring, capacitor body, mobile base, low-voltage arm, etc.

  

4.LBQ-10kVA  Isolation Filter 

The main structure is an isolation transformer and a filter device, which can effectively eliminate the clutter and various interferences in the power supply.

•Rated capacity: 10kVA

• Rated voltage: 400V

•Rated current: 25A

•Fundamental frequency: 50Hz

•No-load loss: ≤5%

•Impedance voltage: ≤5%

• Attenuation characteristics: 40kHz～100kHz≥40dB

                                                     100kHz～1.5MHz≥60dB

•Running time: same as transformer

 

5.GR-100kV  Protective Resistor 

• Rated voltage: 100kV

• Resistance: 5000Ω

• Rated current: 0.1A

•Structural type: The resistor uses enameled resistance wire wound on an epoxy resin board, and adopts a honeycomb structure to fully exchange the heat emitted by the heating wire with the air, reduce the temperature of the resistor when in use, and ensure that the strength of the resistor matrix material does not decrease when heated. The two ends are connected to the transformer and the voltage divider with connecting pipes.

 

6.GDJF-2007 Partial discharge detector (Integrated in the console)

GDJF-2007 Digital Partial Discharge Detector is widely used for detecting partial discharge of high voltage equipment such as power transformers, instrument transformer, HV circuit breaker, GIS, Zinc oxide surge arrester, power cable. It also can make type tests and monitor insulation operation.

 It includes main unit, PD software, current transformer, input unit, calibration pulse generator, input adapter, antenna amplifier and connection cable etc..

• 11.6-inch high-performance industrial all-in-one machine, with portable design, rugged and durable, easy to use.

•Strong anti-interference ability, accurate. Using digital filtering technology, field interference can be effectively eliminated, and partial discharge measurement can be realized in a strong interference environment.

• The system adopts single-channel data acquisition, which can comprehensively analyze and process signals such as electromagnetic waves and ultrasonic waves generated by partial discharge at the same time.

•The system adopts a variety of connection modes, and BNC interface mode is selected between the sensor and the host, which is easy to use.

•Powerful software function. With PD measurement, analysis, PD repeated discharge times N measurement, analysis and anti-fixed interference, anti-dynamic interference. Free choice of ellipse, straight line and sinusoidal display mode. Measure and Observe discharge pulse by window, and test voltage and current, partial discharge can be measured at the same time. All test data of 2channels can be saved timely. Test waveform can be saved, re-displayed and analyzed. The gain range of each channel can be coarse adjusted and fine adjusted. Digital window-opening technology, to avoid the influence of interference on measurement. Phase window opening, single window and double window can be selected. Window can be opened freely within 360degree, four-channel measurement effectively suppresses interference pulse signals, and simultaneously measures partial discharge signals of two samples or multiple measurement points of one sample, and easily analyzes the source of partial discharge signals, internal and external synchronization can be selected randomly;

•The partial discharge display result conforms to the IEC60270 standard.

• The device adopts external power supply mode, and only needs to provide AC220V±10% AC power supply.

Specifications

• Measurement channel: 2 independent channel

•Sampling accuracy: 12Bit

• Sampling rate: 25MSa/s

• Measurement sensitivity: 0.1pC

• Measurement range: 0.1pC-10000nC

• Dynamic range: >80dB.

• Magnification range: -20dB to 80dB

•Capacitance range of test objects: 6pF-250μF

• Measurement frequency band: 10kHz-1MHz at 3dB

• Frequency range of test power: 30-600Hz

• Synchronous voltage: 10–220V

•Programmable filter

 Low frequency: 10K, 20K, 40K, 80K;

 High frequency: 100K, 200K, 300K, 1000K.

 Non-linear error of this range: 5%

•Range: X1, X10, X100, X1000, X10000, X100000 (>120dB)

• Environmental temperature: -15℃--50℃

•Relative humidity: ≤95%(20℃)

• Altitude: ≤3000m.

• Impact ability: 5000V at each input port and power terminal (positive, negative and AC)

•Power input: AC220V±10%, 45-65Hz, power <500W.