Introduction
Ultra-low frequency insulation withstand voltage test is actually an alternative method of power frequency withstand voltage test. As we know, when power frequency withstand voltage test to large generators and cable, it needs to test transformer or resonant transformers with large capacity because their insulation layer are with big capacitance. Such huge equipment, not only weight heavy, high cost and application is also inconvenient. In order to solve this problem, Power Sections adopt reducing the test frequency, thus reducing the capacity of the test power supply.
Model
|
Rated voltage
|
Load capacity
|
Power fuse
|
Weight
|
Application
|
VLF-40
|
40kV(peak value)
|
0.1Hz, =1.1μF
|
10A
|
Controller: 4kg
Step-up: 25kg |
=10kV cable
|
0.05Hz, =2.2μF
|
|||||
0.02Hz, =5.5μF
|
|||||
VLF-90
|
90kV(peak value)
|
0.1Hz, =1.1μF
|
35A
|
Controller: 5kg
Step-up: 60kg |
=35kV cable
|
0.05Hz, =2.2μF
|
|||||
0.02Hz, =5.5μF
|
Input voltage
|
100-240V 50/60Hz
|
Output current (accuracy ±1%)
Resolution |
0-44mA
10μA |
Output frequency
|
0.02....0.1Hz, increments of 0.01Hz, default is 0.1Hz
|
Output mode
|
AC ultra-low frequency AC symmetrical high voltage test, in all test ranges, the waveform is not affected by the load
DC high voltage direct current test positive or negative polarity Fault cable burn-through mode or fault trip mode Outer sheath or shielding layer test mode |
HV cable
|
4.5m HV output cable with alligator clip
|
Accuracy
|
3%
|
Parameters
|
Voltage and current (effective value and peak value)
Capacitance, resistance, time, flashover voltage |
Test method
|
Continuous test
|
Communication Interface
|
RS232 interface (including software),USB
|
Temperature
|
Store :-25℃ to +70℃ Operation:-5℃ to +45℃
|
Size
|
≤450 x 340 x 520 (mm)
|
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