BUFFALO 5
COMBINATION SYSTEMS
Electricity supply or distribution companies often find that buried power cables become faulty due to ageing or damage. Because energy cables are normally not supplied in lengths much longer than 300m, inevitably many joints are installed and buried. They are often the cause for cable faults which render the cable useless until repaired and put back into service. The Buffalo 5 unit is used in conjunction with pre-location and pinpoint location equipment to precisely locate the position of cable faults.
PRINCIPLES OF OPERATION
The Buffalo 5 unit is mainly used for the location of faults in power cable networks. They come in a variety of models from low voltage to very high voltages.
The instrument described on this page generates voltages selectable between 3 or 5 kV and is typically used in the location of faults in low voltage networks such as street lighting or smaller consumers.
The maximum storage energy of the capacitor is 500J at 3kV and 750J at 5kV.
All Buffalo 5 units generate high voltages from the mains supply voltage, which is rectified and used to charge capacitors, which is in turn discharged into a faulty cable at adjustable intervals.
The unit has an internal automatic dump contractor which, upon power failure or turn off, discharges both the unit and the cable under test. This is activated when the unit is turned off or when power failure occurs. It can be operated in the single shot or continuous pulsing method if correct
selection is made.
The unit can also be used to perform DC insulation resistance tests up to the selected output levels. Our very successful Arc-Echo method is added to this unit and forms part of the system.
SPECIFICATION
Supply Voltage : 220 – 240VAC
Supply Current : 10A
Output Voltage : 3 or 5kV
Surge Energy : 500 Joules at 3kV & 750 Joules at 5kV
Weight : 60kg
Dimensions : 600 x 470 x 310mm excluding Lid
Impulse Rate : 6 or 10 PPM
Enclosure : Aluminium, Electrostatically powder coated
Voltage Level adjustment : Switched between 3 or 5kV
Meters : 1 only voltage indication
Proof Testing : Yes
PCA Interface : Built in
Arc-Echo Interface : Built in
ACCESSORIES
Lid : Aluminium with canvas bag for test cables
Test Cables : 5m HT lead with high current clamps
Earth Lead : 5m yellow/green
Mains Lead : 2m 3 core