Vitrek 952i - DC Voltage Withstand and Leakage Testing (Dcez, DCW and DCIR)

95x Series Operating Manual - May 17, 2022
Page 56 of 155
Add 0.005% per Hz above 100Hz
<±0.005° per Hz phase relative to test voltage (InPhs, Quad)
Cable Compensation <(± 1% of error ± 0.1pF)
CAPACITANCE AND DISSIPATION FACTOR MEASUREMENTS (ACCAP TYPE)
Capacitance Add Test Voltage, Frequency, and Quad Leakage Current Accuracies as percentages
Examples at 1000V/60Hz with an isolated DUT -
1pF (= 377nA) : 0.65% + 0.1% + 4.73% = ±5.48%
10pF (= 3.77uA) : 0.65% + 0.1% + 0.92% = ±1.67%
100pF (= 37.7uA) : 0.65% + 0.1% + 0.54% = ±1.29%
1nF (= 377uA) : 0.65% + 0.1% + 0.5% = ±1.25%
10nF (= 3.77mA) : 0.65% + 0.1% + 0.5% = ±1.25%
100nF (= 37.7mA) : 0.65% + 0.1% + 0.5% = ±1.25%
Dissipation Factor For test voltages >100V at 60Hz and capacitive load currents >200uA, the DF
accuracy is ±0.005. For accuracy under other circumstances please contact Vitrek.
TEST TIMING
Ramp 0.00 to 9999sec
<(± 1% ± 0.1sec ± 1 cycle) accuracy
Dwell 0.02 to 9999sec or user terminated
<(± 0.05% ± 20ms ± 1 cycle) accuracy
Fast Discharge <(20ms + 1 cycle)
DC VOLTAGE WITHSTAND AND LEAKAGE TESTING (DCEZ, DCW AND DCIR)
These are used to test that a DUT does not exhibit breakdown or (optionally) arcing in the presence of an applied
DC voltage and optionally to test that the DUT leakage current or impedance is within user set limits.
All of these are performed in the same manner; the difference between them is in the amount of configuration
available. The DCez type is intended for basic breakdown detection, the DCW and DCIR types for comprehensive
breakdown, arcing and leakage testing.
DCez
DCW
DCIR
Use with High Capacitance Loads
Yes
Yes
Yes
Separate Breakdown and Leakage Limits
No
Yes
Yes
Detect Minimum Loading during ramp
No
Optional
Optional
Immediate FAIL on Breakdown detection throughout step
Yes
Yes
Yes
Delay after charging prior to applying leakage limits
No
Optional
Optional
Immediate FAIL on Leakage Failure
Yes
Yes
Optional
End Test on Passing Leakage current or impedance
No
No
Optional
End Test on Steady or improving Leakage current or impedance
No
No
Optional
Detect Arcing
No
Optional
Optional
Immediate FAIL on arc current detection throughout step
No
Optional
Optional
Timed Discharge
No
Optional
Optional
Smooth Transition to next test step if DC Withstand type
No
Optional
Optional