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Verifying That There Is No Voltage
Verifying That There Is No Voltage
DANGER
Verify that there is no voltage both before and after
disconnecting the high-voltage bus cables, and before
reconnecting them.
Failure to do so could cause electric shock.
The purpose of zero-voltage measurement is to prevent electric shock by
verifying that the high-voltage bus has been disconnected. You will do so by
verifying a 0 V reading at locations that could carry a high voltage. Repeat
this test three times: before and after disconnecting the high-voltage bus
cables between the traction battery and inverter, and before reconnecting
them.
Zero-voltage measurement timing Objective
Before disconnecting the high-voltage
bus cables between the traction
battery and inverter
To verify that there is no voltage at locations
with which your hands might come into
contact when disconnecting the high-voltage
bus cables.
After disconnecting the high-voltage
bus cables between the traction
battery and inverter
To verify that the vehicle is not carrying
a dangerous voltage before repairing or
inspecting the EV.
Before reconnecting the high-voltage
bus cables between the traction
battery and inverter
To verify that the high-voltage bus cables
can be safely connected after repairing or
inspecting the EV.
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