Insulation Resistance; Operation Mode Breakdown Recognition; Illustr. 10 : Menu Breakdown Recognition - Megger SPG 5-1000 User Manual

If a breakdown occurs during testing the SPG 5-1000 will not
switch off automatically but will continue to show the
insulation resistance. See following paragraph for conditions.

6.3.1 Insulation resistance

Insulation resistance is shown on the top right corner of the
display as soon as a minimum voltage of 100 V and a
minimum current of 10 µA are measured.
6.4

Operation mode breakdown recognition

Breakdown recognition is the simplest way of finding the
breakdown voltage. The maximum voltage entered by the
operator is adjusted automatically. The SPG 5-1000 raises
the output voltage slower than in testing mode with a time
ramp of 250 V/sec until breakdown occurs. After a breakdown
the breakdown voltage is shown.
This mode does not have a timer function as in testing, but
the SPG 5-1000 will automatically turn off the high voltage
after the breakdown has occurred.

Illustr. 10 : Menu breakdown recognition

Breakdown recognition
570 V
output voltage
2000 V
back
max. voltage
push green button
set voltage
Breakdown has occured
12 mA
leakage current
HV-ON
HV-OFF
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