Megger MTO210, Инструкция по эксплуатации

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M
AVTMMTO210 Rev 7 Sept 2013
38
3. Connect "V1" voltage leads to test specimen winding. See Figure 9.
4. Connect current leads (I) to test specimen winding. Do not clip voltage
leads on to the current leads, since this will add contact resistance to the
measurement.
Voltage leads should always be placed inside
(between) the transformer and the current leads. See Figure 9.
5. Turn power switch "ON" (-).
6. Press button to initiate current flow.
7. The top display indicates current output and Ohm 1 display indicates
resistance.
8. Step thru the TAPS of the “On load” tap changer. The resistance should
change slightly with each TAP change. Press to save and/or print
the readings of each tap.
If a Break Before Make condition occurs the Break Before Make Indicator
will flash rapidly.
Depending on the length of the break, one of two things will happen.
1. For small breaks, the unit will rapidly flash, but the system will continue
to operate and give resistance readings.
2. For breaks longer than 10msecs, the system will automatically shut down.
The HV Indicator will extinguish and the Discharge Indicator will flash.
To extinguish the Break Before Make Indicator after an event, press .
If no such condition exists the Remote Indicator will start slow flashing again
until the circuit stabilizes from the tap change and then go steady when this
setting has stabilized.
3. Press to record the reading again and the process continues until all
transformer taps are tested.