Megger SG32-1500M, User Manual

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SG32-UG-EN-V01 Dec 2016
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NOTE: The position of the Voltage Range and Test Mode switches cannot be
changed while a particular test mode is activated (mechanical interlock).
3. Set the SELECT (test) Mode knob (item 16) to the SURGE &
PROOF/BURN test group. Both buttons blue LEDs will illuminate,
indicating that either of these test modes are available.
4. Push the SURGE (test) Mode button (item 19). The selection is confirmed
by the SURGE pushbutton’s Blue LED remaining illuminated, and the
PROOF/BURN button’s Blue LED extinguishing.
5. On the MTDR, select Current Impulse.
6. The MTDR is armed (made ready) by selecting “TRIGGER ON” from the menu
buttons. The word “armed” is displayed on the MTDR.
For FULL instructions on the use of the TDR refer to Addendum 3 -
MTDR100 User Guide.
7. The required “Impulse or Surge” voltage is set by rotating the (High) Voltage
Control knob (item 12) to the required voltage, which is normally slightly
higher than the voltage that the fault broke down at. The selected voltage is
displayed on the analogue D.C. Kilovolt meter (item 22).
8. Set the rotary SURGE TIME CONTROL knob (item 13) to the desired
repetition rate, either to single shot or to typically 5 seconds delay between
shots.
If
the Surge Cycle control knob is set to “SINGLE SHOT”, the SINGLE
SHOT RELEASE pushbutton’s LED will illuminate, indicating it is available
to be activated and the shot to be released.
If
the Surge Cycle control knob is set anywhere between 1 and 15 seconds,
the SINGLE SHOT RELEASE button is automatically de-activated and its
yellow LED will NOT illuminate.
9. Push the SINGLE SHOT RELEASE button (item 15) and the impulse or
surge voltage is applied to the cable under test, and the resultant waveform
on the MTDR can be analysed to determine the fault position.
NOTE: By observing the Voltmeter and Ammeter the operator can confirm that
there has been a full discharge.
If operation "fails to trigger" increase voltage and repeat operation.
10. Pushing the HV OFF button (item 9) will discharge the selected test voltage.
The HV OFF button’s Red LED will extinguish and the HV ON
pushbutton’s (item 10) Green LED will illuminate. The unit will remain in
the SURGE test Mode.