47
PVΩ Measurement Function (Model IR4053 and IR4055 only)
The method to measure the insulation resistance between the solar
battery panel and ground without shorting P and N will be explained.
See “Appx. 3 Insulation Resistance Measurements for Solar Cell
Array” (p. Appx.3)
Measurement preparation 1
1
Turn off the main switch of the connection box to be
disconnected from the power conditioner.
2
Turn off all the disconnector devices of the strings.
3
Disconnect lightning arresters from the measuring circuit.
Disconnection is not required for the gure (solar generator facility)
shown below because a lightning arrester is not present at the string
side of the disconnector device.
OFF
2
OFF
1
String
Disconnector devices
Main switch
Lightning
arrester
Connection
box
Power
Conditioner
(Example: Solar generator facility)
Measurement preparation 2
2
3 4
1
OFF
1
Check that the MEASURE key is
turned off.
If the MEASURE key is on, turn it off.
(p. 16)
2
Set the rotary switch to PV
Ω
.
3
Press to set 500 V or 1000 V
as the test voltage.
4
Press to release the lock.
1
2
4
5
6
7
付録索引
3
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