KF-6901D is a portable 5-channel partial discharge inspection and testing instrument that can provide five detection methods according to different configurations: transient earth voltage (TEV), air ultrasonic (AA), contact ultrasonic (AE), high-frequency current (HFCT), and ultra-high frequency (UHF); The detection results display discharge intensity, discharge phase, historical data, etc. in numerical and graphical form, while providing environmental measurements of temperature, humidity, and air pressure values.

Functional Features

U has rich detection functions, providing multiple detection methods such as transient earth voltage (TEV), ultrasonic (AA and AE), high-frequency current (HFCT), ultra-high frequency (UHF), etc.

U provides test data management and allows for one click saving of test data.

The human-machine interaction adopts the latest ARM processor and embedded operating system, with touch operation and user-friendly interface.

U provides a USB interface for data export.

The built-in function self-test ensures that the instrument functions properly.

U can measure the environmental temperature and humidity of the detected object.

The attachment is rich and convenient for testing various devices, including TEV probes, ultrasonic parabolic waveform concentrators, contact ultrasonic probes, external extended microphone probes, HFCT sensors, ultra-high frequency sensors, non-contact infrared temperature sensors, etc.

According to ergonomic principles, it is convenient for handheld operation.

Application scenarios

It is suitable for live detection and positioning of partial discharge in electrical equipment such as distribution cabinets, switch cabinets, transformers, cables (including cable trays, joints, etc.) and insulators, pole mounted switches, GIS, etc. of overhead lines in substations and factories.

Hardware parameters

1.1.1 TEV transient ground voltage measurement

U Sensor: Capacitive

Measurement range: 0-60dBmV

Frequency range: 1-100MHz

U resolution: 1dB

Accuracy: ± 1dB

Maximum number of pulses/cycles: 1400

Minimum pulse rate: 10Hz

1.1.2 AA air ultrasonic measurement

Measurement range:- 7dBuV～68dBuV

U resolution: 1dB

Accuracy: ± 1dB

U Sensor sensitivity:- 65dB (0dB=1 volt/ubar effective value SPL)

Sensor center frequency: 40kHz

Frequency range: 20-100kHz

Sensor diameter: 16mm

U heterodyne frequency: 38.4kHz

1.1.3 AE Contact Ultrasonic Measurement

Measurement range: 0dBuV~68dBuV (0.001mv~1.000mv)

U resolution: 1dB

Accuracy: ± 1dB

U Sensor sensitivity:- 65 dB (0 dB=1 volt/μ bar effective value SPL)

Frequency range: 0-200 kHz

1.1.4 HFCT high-frequency DC measurement

U Sensor: HFCT

Measurement range: 0pC to 25000pC

Sensitivity: not less than 50pC

Detection frequency: 3MHz~30MHz

Inner diameter: 45mm

Outer diameter: ≥ 110 mm

Output impedance: 50 Ω

Output interface: BNC connector

1.1.5 UHF ultra-high frequency measurement

U Sensor: UHF

Measurement range:- 75dBm ~0dBm

Sensitivity:> 12mm equivalent height

Resolution: ± 0.5dB

Frequency response: 300MHz~1500MHz

Output impedance: 50 Ω

Output interface: BNC type

1.1.6 Input and output interfaces

U LEMO external ultrasonic sensor input interface

BNC external AE sensor input interface

BNC external HFCT sensor input interface

BNC external UHF sensor input interface

3.5mm stereo headphone jack

U standard SD card data storage interface

2.1mm Low Voltage DC (18VDC) Charger Interface

1.3mm power supply synchronous input interface

USB interface

RJ45 Ethernet interface

1.1.7 SD card

U comes standard with 16GB (supports 4GB and above SD card)

1.1.8 Earphones

3.5mm stereo headphone jack, 32 ohms

1.1.9 Built in power supply

Internal battery: 3.7V/31.2Ah lithium-ion battery

Normal working hours: approximately 8 hours

Battery protection function: automatic alarm when low voltage occurs