Delta Electronics MVF2000 Series Product Manual page 120

time.

Step11: Disconnect the short circuit wire between output terminal to ground (Step7),
and short input terminal to ground;

Step12: Repeat Step8~Step10, but applying the high voltage between output
terminal and ground, and so does the insulation resistance.
If the input voltage and output voltage rating are the same, conduct the dielectric
withstand test covering both input and output.

Step7: Based on step2&step3, connect the input and output terminal to ground.

Step8: Measure the insulation resistance between input terminal and ground using
a 1000V megger, the resistance should greater than 100MΩ.

Step9: Apply power frequency high voltage at the input terminal with respect to
ground for 5S, no breakdown and flashover are required.

Step10: Measure insulation resistance again. The resistance should greater than
100MΩ, and the variation is less than 30% compared with the first time test data.
After testing, restore the MVD.
4. Replace storage battery
Replace storage battery:

Open QF15.

Remove the corner piesce of battery, pull the terminal on the battery polarity out.

Install the new storage battery and rewire (note the polarity of battery).
5. Storage Battery Maintenance

Prepare for a DC output tunable power, which is provided with an output current
limit function.

Tune the output voltage of DC power to 14.4V~14.7V, output current limit is set at
1.3A, connect the positive/negative poles to the correspondent sides of the battery,
and then open DC power to charge.

Every battery needs to be charged for at least 16~24 hours; after charging, cut off
DC power and then disconnect the connected wires between storage battery and
DC power, and the process is done.

A scheduled periodical Maintenance is highly recommended if storage battery will
not be used in the long term.
Stock temperature
Fig. 10-4 Storage Battery Looks (upper view)
below 20ºC Every six months
20 ºC ~30ºC Every three months
above 30ºC Stock under this temperature in
the long term is strictly forbidden.
Charge Maintenance period