GDF-3000A DC System Earth Fault Detector

GDF-3000A DC System Earth Fault Detector

DC system insulation faults, DC mutual faults and AC power failures are faults that are prone to occur and are harmful to the power system, and endanger the normal operation of the power system.

In order to better help field maintenance personnel to quickly and accurately find DC faults, our company has developed a DC fault finder by years of efforts and summing up a large number of field experiences.

The DC grounding finder uses a high-precision current clamp meter to detect and locate faults using the DC current difference in the fault loop. The fast FFT transform technology is introduced into the DC fault finding device, to detect various types of insulation faults, DC mutual faults, and AC power failures in DC systems with different voltage level (24V (optional), 48V, 110V, 220V).

With the increasing requirements for safe operation of power systems, the requirements for various types of DC fault finding in power systems will also become higher and higher. Therefore, high-precision, insulation trend analysis will become a basic requirements of the instrument for power systems' new generation DC grounding search.

(1) System-to-ground voltage measurement function, the instrument can measure the system-to-ground voltage, negative-to-ground voltage, system voltage, and can realize the voltage monitoring range of 0-300V;
(2) System insulation impedance measurement function, the instrument can measure the insulation resistance of the system to ground, the negative insulation resistance to the ground, the balance bridge size detection, the measurement range is 0-999.9KΩ;
(3) AC power detection function, the instrument can judge the AC power failure 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 in real time;
(5) Ring network detection and positioning function, the instrument can detect various ring network faults in the two bus bars, including positive ring, negative ring, bipolar ring and bipolar ring, etc., and can be realized by waveform display and direction display to locate the fault point of the ring network;
(6) The device has amplitude modulation, reset, current waveform selection and working mode selection function, which can realize the search and location of high resistance ring network faults.
(7) Branch insulation resistance measurement and insulation fault location function, the instrument measures the insulation resistance of each branch to ground, and can realize the location of insulation fault points through waveform display and direction display;
(8) Fault current spectrum analysis function, the device effectively extracts the signal amplitude of the measured current frequency point, and improves the detection precision by spectrum analysis function of current change with fast FFT transform ;
(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 measured branch, it will display the current change of the measured branch in the form of a waveform curve on the screen, which is convenient for the user to realize the fault point quickly and accurately. Find the direction of the fault point when there is a ring fault and a ground fault.