Megger 128311841, Operating Manual

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Operating Manual
8
HV Tester 25 kV
3.2.2 Mains
If the set is connected to the mains, the external DC voltage and
internal battery are switched off (signalled by the green LED [11] p. 11).
Mains operation is accompanied by recharging / floating operation of
the internal battery.
The set is switched on with the "Mains" key switch, which is signalled by
the white standby indicator [4] p. 11.
The HV Tester 25 kV has a monitoring circuit which switches the high
voltage off if the voltage is to low.
The set remains connected to the mains even once the "Mains" key
switch has been turned off, allowing recharging / floating operation of
the internal battery.
CAUTION: Take care of the voltage selector switch [1], p. 9!
3.2.3 External battery
The external DC voltage must be in the 11-15 V range. This is indicated
by the green LED [12] p. 11. If the voltage is to low, the colour changes
to red. The high voltage will then be switched off after approximately
10 minutes.
3.2.4 Maintenance procedure (internal battery)
To charge the internal battery connect the mains supply to the HV
Tester (LED [11] p.11 lights up).
The 'Mains' key switch doesn't have to be switched on.
It takes approx. 10 hours to fully charge the internal battery from low
battery level.
The current is changed automatically between recharging / floating
operation of the internal rechargeable battery.