This handheld multifunctional partial discharge detection tester is suitable for transformers GIS、 Partial discharge detection and positioning of high-voltage electrical equipment such as switchgear, cables, lightning arresters, and transformers.

The handheld multifunctional partial discharge detection tester consists of a detection host, partial discharge detection software, high-frequency current transformer (HFCT), calibration pulse generator, flexible ultrasonic sensor, focused ultrasonic sensor, and connecting wire.

1. Handheld design, sturdy and durable, easy to use

The detection host is designed for handheld use, with a sturdy and reliable casing. It uses a 10.1-inch high-performance computer motherboard and has a built-in 10AH lithium battery. It can work for up to 6 hours without the need for external power supply.

2. Strong anti-interference ability and accurate detection data

By utilizing digital filtering technology, on-site interference can be effectively eliminated, and partial discharge measurement can also be achieved in strong interference environments.

3. High sensitivity sensors that can sensitively reflect the partial discharge state inside the device

The ultrasonic sensor adopts current technology and has been verified in practical applications to detect weak discharge signals, ensuring effective detection of partial discharge signals inside high-voltage equipment. The high-frequency current transformer is made of high-strength aluminum alloy and is internally shielded with metal, reducing the impact of external magnetic fields on the detection accuracy of the sensor.

4. Easy and convenient installation

The non-contact ultrasonic sensor is equipped with an ultrasonic focusing device at the front end, which is easy to operate in high-voltage cable inspection. High frequency current transformers are designed with circular or rectangular openings, making them easy to clamp onto different grounding wires.

5. The system adopts multi-channel data acquisition

It can comprehensively analyze and process signals such as electromagnetic waves and ultrasonic waves generated by partial discharge simultaneously.

6. Easy and convenient connection

The system adopts a unified connection method, and BNC interface is used between sensors and hosts for ease of use.

7. Powerful software functionality

Partial discharge measurement and analysis, measurement and analysis of repeated partial discharge times n, resistance to fixed interference, resistance to dynamic interference, free selection of elliptical, straight, and sine display modes, detailed measurement and observation of discharge pulses in the window section, simultaneous measurement of test voltage, current, and partial discharge, automatic timed saving of experimental data in two channels, manual or real-time saving of experimental data in two channels, waveform storage at any time, re display and analysis of previously saved experimental waveforms, gain range with six coarse adjustments per channel and each fine adjustment at will, digital windowing technology PRPS technology can avoid the influence of interference on measurement, with optional phase window, single window, and double window options. It can open windows freely within 360 degrees to effectively intervene in interference pulse signals and measure partial discharge signals from multiple measurement points of two or one sample simultaneously. It is convenient to analyze the source of partial discharge signals and can be selected synchronously internally or externally.

8. The partial discharge display results of this software comply with the IEC60270 standard and can be displayed in two ways: pC value and mV value.

1. Scope of application

Capable of detecting and locating partial discharge of high-voltage electrical equipment in operation, suitable for transformers GIS、 Partial discharge live detection and positioning of high-voltage electrical equipment such as switchgear and cables.

2. Product technical specifications and standards

1) IEC60270 "Partial Discharge Measurement"

2) GB/T7354 "Partial Discharge Measurement"

3. Usage environment

1) Environmental temperature: -10 ℃~50 ℃

2) Relative humidity: ≤ 95%.

3) Altitude: ≤ 1000m

4. Host technical parameters

Measurement channels: 2-4 independent measurement channels

Sampling rate: 250MHz per channel

Detection sensitivity: 1pC

Measurement range: 1pC to 10000pC

Dynamic range: greater than 80dB;

The measurement frequency band is 3dB bandwidth: 10kHz to 30MHz.

Digital filter: can be set arbitrarily within the range of 50kHz to 30MHz

Power supply: AC220V ± 10%; Frequency 50Hz; Power ＜ 50W

5. Technical parameters of sensors

5.1 TEV sensor

Signal acquisition: capacitive coupling;

Frequency range: 3-100MHz;

Measurement range: -20~60dB/mV;

5.2 High frequency current transformer

Detection frequency band: 500kHz~30MHz

Signal transmission method: 50 Ω coaxial cable

Detection sensitivity: 10pC

5.3 Flexible Ultrasonic Sensor

Resonant frequency: 40kHz ± 1kHz

Measurement range: -10dBuV to 70dBuV

Sensitivity: -68dB (at 40.0kHz, 0dB=1 Volt/μ barrms SPL)

Accuracy: ± 1dB

Resolution: 1dB

5.4 Concentrated Ultrasonic Sensor

Resonant frequency: 40kHz ± 1kHz

Measurement range: -10dBuV to 70dBuV

Sensitivity: -68dB (at 40.0kHz, 0dB=1 Volt/μ barrms SPL)

Accuracy: ± 1dB

Resolution: 1dB