113KV DC PROOF TEST SYSTEM SPLIT UNIT
Test engineers and technicians need to proof test cables and switchgear after installation or rework to existing systems. The Adret range of proof testers was designed with simplicity of use and maximum operator safety in mind. The range offers many different models from DC to AC and VLF (very low frequency) as well as combination AC and DC models.
PRINCIPLES OF OPERATION
All the units use the input voltage through a step up transformer to obtain the high AC voltages. In case of DC output the AC is rectified through a suitable rectifier capable of withstanding the high voltages. Some units use a combination of AC and DC that is switched to deliver AC or DC or both. In the case of VLF equipment a pseudo sine wave is produced through a number of switches and resistors.
The outputs are current limited and the unit automatically trips when a set limit is reached. When this occurs the cable is discharged and made safe through a built in discharge resistor. In case the circuit layout does not allow (in case of split units) the automatic discharge of the cable, a suitable manual discharge resistor is supplied The units are portable and simple to operate.
TESTS ARE POSSIBLE TO MOST WELL USED ISO SPECIFICATIONS
SPECIFICATION
Supply Voltage : 220-240VAC
Supply Current : 16A
Output Voltage : 0-80kVAC, 0-113kVDC
Output Current : 50mA Continuous
Weight : 30kg and 30kg
Dimensions : 350x200x300mm Control Unit : 380x300x500mmHT Unit Excluding lid
Enclosure : Pelican IP67
Voltage Level Adjustment : Continuously variable
Meters : Voltage and Current
Trip Level : 50mA
ACCESSORIES
Test Cables : Patch Lead with clamps
Earth Lead : 5m yellow/green
Mains Lead : 2m 3 core
Included : Discharge Stick, 5m interconnection cable, Rectifier diode, Current limiting resistor, Corona ring