KDZD836 DC grounding finder adopts high-precision current clamp meter, and uses the DC current difference in the fault loop to find and locate the fault. The fast FFT transform technology is introduced into the DC fault finding equipment, which can detect various voltage levels (24V, 48V, 110V, 110V, 24V, 110V). 220V) All kinds of insulation faults in the DC system, DC mutual channeling faults, AC channeling faults.
 
Main function introduction
(1) The system voltage to the ground measurement function, the instrument can measure the system voltage to the ground, negative voltage to the ground, system voltage, can achieve 0-300V voltage monitoring range;
(2) The system insulation impedance measurement function, the instrument can measure the system's positive insulation impedance to the ground, negative insulation impedance to the ground, balance bridge size detection, measuring range 0-999.9 KΩ;
(3) AC channeling detection function, the instrument can judge the AC channeling fault in the DC system, and can measure the AC voltage value in the DC system, the AC voltage measurement range is 0-280V;
(4) System distributed capacitance measurement function, the instrument can measure the distributed capacitance of the system and display it in real time.
(5) Ring network detection and positioning function, the instrument can detect a variety of ring network faults in the two busbars, including positive ring, negative ring, bipolar ring and heteropolar ring, etc., and can realize the positioning of ring network fault points through waveform display and direction display;
(6) The device has the functions of amplitude modulation, frequency modulation and current waveform selection, which can realize the search and positioning of high-resistance ring network faults.
(7). Branch insulation impedance measurement and insulation fault location function, the instrument measures the insulation impedance of each branch to the ground, and can realize the location of the insulation fault point through waveform display and direction display;
(8) Fault current spectrum analysis function, the device realizes the spectrum analysis function of current change through fast FFT transformation, effectively extracts the signal amplitude of the measured current frequency point, and improves the detection accuracy;
(9) ammeter function, the device can be used as a high-precision ammeter, and the current measurement resolution can reach 0.01mA;
(10). Waveform curve display and direction display function, when using the detector to detect the branch under test, the display will display the current change of the branch under test in the form of waveform curve, which is convenient for users to quickly and accurately find the fault point, and show the fault point direction when there is a ring network fault and a ground fault.

Equipment characteristics
(1) High reliability design
The device adopts imported 32-bit microcontroller as the main system, the hardware design is strictly in accordance with the relevant standards of power and electromagnetic compatibility, and the reliability of the device and the equipment under test is guaranteed by multi-place redundancy.
(2) Precision material selection
The device uses a high-precision collector as the signal acquisition unit, and the voltage sampling adopts a high-precision imported analog-to-digital conversion chip, so the voltage and impedance can be measured accurately.
(3) Humanized human-computer interaction interface
"Analyzer" and "detector" both use TFT LCD display for users to view information;
The operation is simple and fast. When detecting different branches, you only need to press the start key once.
The test result display is intuitive and clear, and the test result can be presented to the user through a variety of display forms, including ground or not, waveform curve, insulation grade, insulation impedance, leakage current size, direction information, etc.
(4) Intelligent detection and identification system
The "analyzer" can automatically identify the system voltage level;
"Analyzer" can judge the fault category of ring network;
After the information of "detector" and "analyzer" is synchronized once, it is not affected by the detection distance;
When detecting, the collector can clamp a single power cable or multiple power cables to improve detection efficiency.
After the detection is completed, if the tested branch has a ring network or insulation fault, it will determine the direction information of the fault point relative to the test point.
(5) Complete test function and troubleshooting ability
A wireless data transmission module is built in between the "analyzer" and the "detector" for communication, and the test function and display information are complete, which can deal with all kinds of ring network and insulation faults in the DC system.
"Analyzer" with "amplitude modulation", "frequency modulation", "waveform" a variety of combination working mode selection function, can adapt to a variety of complex application environment.
(6) High security
The device uses microampere-level detection signal and high-resolution DC detection collector to realize fault detection and location, which has no impact on the DC system.

Main technical index
 
Analyzer main technical indicators
Use environment
Power supply: DC30V-300V,
Signal source output power: < 0.01W;
Ambient temperature: -20℃ -55 ℃
Relative humidity: 0-90%
Dc voltage measurement
Dc voltage measurement range :0-300V
Dc voltage measurement resolution: 0.1V
Dc voltage measurement accuracy: 0.2%
Ac voltage measurement
Measuring AC and DC channeling voltage: 0-280v
Ac voltage measurement resolution: 0.1V
Ac voltage measurement accuracy: 0.5%
Insulation resistance measurement
Insulation resistance measurement range :0-999.9KΩ
Insulation resistance measurement resolution: 0.1KΩ
Insulation resistance measurement accuracy: ≤±5%
Detection bridge amplitude adjustment range: 0mA, 0.25mA, 0.5mA, 1mA, 2mA
Bridge frequency adjustment range: 0.125Hz, 0.25Hz, 0.5Hz, 1.0Hz
Detection ring resistance range: within 500KΩ
System distributed capacitance measurement
System distributed capacitance measurement range: 0-999.9uF
Measurement of system resistance to ground: 0-1000kΩ
Detection waveform type selection: sine wave, square wave
Working mode: forced signal start, automatic signal start
Display media and resolution: TFT,320x240
 
Main technical index of detector
Insulation resistance measurement
Insulation resistance measurement range :0-500KΩ
Insulation resistance measurement resolution: 0.1KΩ
Insulation resistance measurement accuracy: ≤±10%
Spectrum analysis range
Number of spectrum analysis channels :1
Spectrum analysis frequency range :0.125-12.5Hz
Frequency resolution: 0.125Hz
Current waveform display period: 8s;
Can detect feeder current range: 0-2A;
Current measurement range: -100 - +100mA;
Current measurement resolution: 0.1uA
Display media and resolution: TFT,320x240
 
Wireless communication technical indicators
Speed: 2Mbps, due to the short air transmission time, reduce the collision phenomenon in wireless transmission
Multi-frequency: 125 frequency points, to meet the needs of multi-point communication and frequency hopping communication
Ultra-small: built-in 2.4GHz antenna, small size, 15x29mm
Low power consumption: When working in response mode communication, fast over the air transmission and startup time reduce current consumption.