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Performing Insulation Resistance Testing
Performing Insulation Resistance
Testing
CAUTION
Use a voltage range that is higher than the traction battery’s
voltage.
Failure to do so may prevent measurement. For more
information, refer to the vehicle manufacturer’s service manual.
Insulation resistance testing is performed to verify that there is no insulation
defect between the high-voltage bus and ground. It is performed on the
traction battery side of the bus as well as the inverter side. Testing is carried
out between the terminals on both sides of the high-voltage bus cables
and the vehicle’s chassis ground. The test voltage used to make these
measurements must be higher than that of the vehicle’s traction battery.
Since the test voltage varies with the vehicle under test, please refer to
vehicle manufacturer’s service manual.
For more information about how to use the IR4059, see the IR4059’s
Instruction Manual.
Testing locations
(example)
IR4059 terminal (+) IR4059 terminal (−)
Traction battery side High-voltage bus cable
positive electrode (+)
Chassis ground (GND)
High-voltage bus cable
negative electrode (−)
Chassis ground (GND)
Inverter side High-voltage bus cable
positive electrode (+)
Chassis ground (GND)
High-voltage bus cable
negative electrode (−)
Chassis ground (GND)
Chassis ground (GND) High-voltage bus cable
positive electrode (+)
Chassis ground (GND) High-voltage bus cable
negative electrode (−)
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