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PV Insulation Resistance Measurement Function (IR5051 Only)
3.9 PV Insulation Resistance Measurement
Function (IR5051 Only)
This function can accurately measure the insulation resistance between a PV panel
and ground without being aected by power generation. For a measurement between
the connection box output terminal and ground and between the power conditioner
and ground, use the insulation resistance measurement function, not the PV
insulation resistance measurement function (p. 41).
WARNING
Do not measure insulation resistance while an object under
measurement is energized.
Doing so could damage the instrument, resulting in bodily injury.
Shut o the power to the object under measurement before
measurements.
Do not touch the object under measurement or disconnect
the test leads after measurement has been completed until
the automatic discharge function is completed.
Electric shock may result due to high voltage and stored charge.
Do not directly touch the metal parts of the connection box,
disconnector, and other devices.
Electric shock may result due to high voltage from power generation.
Securely connect the measurement cables to the
measurement terminals.
Loose terminals could increase contact resistance and cause the
instrument to overheat, resulting in instrument burnout or re.
When measuring a PV panel, make sure to turn o the
disconnector or other device to separate the panel from the
power conditioner.
Make the measurement using sucient caution to protect
against electric shock because PV cells always generate
power and hazardous voltage during the day.
Failure to do so could cause the user to experience an electric shock.
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