Transformer Partial Discharge Tester 

The GHPD903 Transformer Partial Discharge Tester is equipped with composite TEV sensors, ultra-high frequency sensors, high-frequency current transformers, and high-sensitivity ultrasonic sensors to collect partial discharge signals inside high-voltage equipment. By collecting different signals generated by partial discharges inside various high-voltage equipment, the operating status of the equipment can be quickly detected online.



The instrument can be installed and tested while the equipment is in operation, without any impact on the normal operation of the equipment, greatly improving the reliability, safety, and effectiveness of equipment operation. Note: It is mainly used for partial discharge inspection and positioning of switchgear, main transformers, GIS, and cables.

The GHPD903 Transformer Partial Discharge Tester is developed by our company's technical personnel based on years of partial discharge detection experience, and is suitable for online detection and positioning of partial discharges in high-voltage equipment.

GHPD903 Transformer Partial Discharge Tester Functional Features

1. Suitable for partial discharge inspection and positioning of switchgear, main transformers, GIS, and cables, with contact measurement; additionally configured with TEV sensors and HFCT sensors for multi-angle testing of the test object;

2. Compact structure, handheld, tool-type, small size, light weight, high degree of automation, simple and practical;

3. Built-in measurement and analysis software, directly displaying discharge waveforms;

4. The sensor is stethoscope-type, with features such as large contact area, strong anti-interference capability, high sensitivity, accurate measurement, simple operation, and safety and reliability;

5. Simple to use, no complex settings required, ready to use after power-on;

GHPD903 Transformer Partial Discharge Tester Technical Parameters

1. Composite TEV Measurement

Sensor: Capacitive

Measurement Range: 0～60dBmV

Resolution: 1dB

Error: ±1dB

Detection Bandwidth: 5~70MHz

Pulses/Cycle Maximum: 655

Threshold Adjustment Range: 3～57dB

2. High-Frequency Current Transformer

Detection Frequency Band: 10kHz～30MHz

Signal Transmission Method: 50Ω Coaxial Cable

Detection Sensitivity: 10pC

3. Ultrasonic Sensor

Measurement Range: -7dBμV～68 dBμV

Resolution: 1dB

Error: ±1dB

Sensor Sensitivity: -65dB (0dB = 1volt/μbar SPL)

Sensor Center Frequency: 20～50kHz

Sensor Diameter: Not greater than 50mm

Heterodyne Frequency: 38.4kHz

4. Ultra-High Frequency Sensor

Detection Frequency Band: 300MHz～1.5GHz

Signal Transmission Method: 50Ω Coaxial Cable

Detection Sensitivity: 1dB

Gain: >65dbm

5. Product Type: Multifunctional Partial Discharge Tester

Display Method: 2.8-inch Color LCD Screen

Dimensions: 300 mm×240 mm×40 mm

Instrument Weight: 2.8kg