58
PV Insulation Resistance Measurement Function (IR5051 Only)
8
If there is no insulation deterioration in the measurement for the N
terminal side, connect the red test lead to the P terminal on the PV string
side and repeat steps 5 to 7.
P terminal (+)
8
Ground terminal
(Black)
(Red)
Disconnector
String
Power conditioner, main switch
N terminal (−)
After the end of measurement
1
After the insulation resistance of all PV strings has been measured,
disconnect the black test lead from the ground terminal.
2
Reconnect any lightning arresters that were disconnected.
3
Turn on the disconnectors for all PV strings.
4
Turn on the main switch in the connection box.
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