KYORITSU KEW 3127, Instruction Manual

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6-6 SV Measurement (Step Voltage)
This is a test based on the principle that an ideal insulation will produce identical
readings at all voltages, while an insulation which is being over stressed, will show
lower insulation values at higher voltages. During the test, the applied voltage
incrementally steps by a certain voltage taking successive 5-time measurement.
Degradation of insulation may be doubt when insulation resistances become
lower at higher applied voltages.
(1) Setting items
Setting items for SV measurement are as follows.
(For SV measurement, 250V cannot be set at 500V (250V) Range.)
* Step time : Measurement duration per step.
* Breakdown/ Burn : Either Breakdown or Burn mode is selectable.
Resistance value
During test: Output current
End of test: Capacitance
Present step
Time when
a test ends
Output voltage
SV Measurement Result
: 1st step
: 2nd step
: 5th step
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