45
PVΩ Measurement Function (Model IR4053 and IR4055 only)
WARNING
Observe the following to avoid electric shock, short
circuit, or damage to the instrument.
• Turn off any disconnector devices and separate
from the power conditioner before starting the
measurements for the solar battery panel.
• Do not attempt to measure insulation resistance
on a live conductor. Doing so could damage the
instrument or cause an accident that might result
in injury or death. Always turn off power to the
measuring object before starting.
• Photovoltaic cells produce electricity continuously
during daylight hours, resulting in hazardous
voltages. Exercise care during measurement to
avoid electric shock.
• Do not touch any metal parts such as connection
box and disconnector devices directly with bare
hands. Doing so may cause electric shocks due to
the voltage of the generator.
• Maximum rated voltage between terminals of the
IR4053 and IR4055 is 1000 V DC/600 V AC. Do not
use the instrument for equipment with rated voltage
over 1000 V DC or 600 V AC. Doing so may cause
electric shock or failure.
• If the solar battery panel has failed, do not perform
any insulation resistant measurement. Doing so
may damage the bypass diode of the solar battery
panel.
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