Instrument functions and features:
Capable of measuring a variety of voltage grade power cable high/low resistance insulation faults.
GD-8630 all-around cable fault tester will be the traditional time-domain method (pulse method, flashover method) and high voltage intelligent bridge method cleverly together. High impedance leakage faults which can not tested by flashover method will accurately test the distance of faults when entering the exact length of the cable on-site.
Automatically analysising to determine the distance of faults by High Voltage Intelligent Bridge. It has the functions of the traditional pulse method and the flashover method testing for the special high-resistance flashover fault and short circuit/open circuit faults. Whatever the test method is extremely simple. This instrument can deal with any kind of cable failure with convenient and quick.
Main Technical Performance:
High-brightness large-screen display function, clear picture quality, touch-screen operation, waveform processing and powerful function. The instrument can detect the power cables high resistance flashover, leakage fault, low resistance, short circuit fault and open circuit fault of below 35kV voltage level;
There is a perfect waveform processing functions: instrument with expert help system and the teaching function. Time-domain method and high-voltage intelligent interface bridge law was passed in touch access keys free conversion, it can show the testing data quickly after inputting directly cable length values and touching "test" button with the high-voltage intelligent bridge method.
Time-domain testing method
There are several varieties tested cables: below 35kV a variety of copper of power system.
Test method: low-pressure pulse method; DC high-voltage flashover method; the impact of high-voltage flashover method (current pulse method); high voltage intelligent bridge method
Data sampling frequency: 48MHz, 24 MHz, 12 MHz, 6 MHz
Sampling methods: voltage sampling, current sampling method
Single-ended Test Distance: low voltage impulse method 16km, the impact of high-voltage flashover way > 10km
System Test Accuracy: < 20cm
Equipped with low-voltage pulse width: 0.2μs, 2μs, 4μs
Low-voltage pulse amplitude: > 250V p-p
With a test waveform storage function: Testing waveforms at field can be stored in the tester according to specified order of seniority, it is convenient to compare and use at any time. Total 900 field test waveforms can be stored.
Working conditions: Temperature -20 ~ 45 ℃
Automatic testing method
Apply to any voltage level, any type, any length of various power cables, high voltage transmission and distribution lines, control cables, oil well logging cables, submarine cables, rubber-sheathed cables mine insulation high impedance fault, low-impedance fault, short-circuit fault.
LCD screen display, display accuracy: 1m
Maximum measuring distance: 60km
Test Accuracy: when leak resistance is less than 50κΩ, < 2m
when Leakage resistance is greater than 50κΩ less than 100κΩ, < 5m
when Leakage resistance is greater than 100κΩ less than 500κΩ, < 10m
Adaptive high-voltage constant-current power supply: 0 ~ 1000V/DC
Circuit test current: 10mA/DC