“ Any HAZV traction battery system must be isolated from the chassis of the vehicle, and also from any auxiliary ELV components and wiring. Isolation must be designed such that there is a leakage current of less then 29 mA between any part of the HAZV system and either the chassis or ELV components of the vehicle, measured when the vehicle is at rest.
This requirement means that both the HAZV battery pack positive, and the HAZV battery pack negative, are to be floating relative to the chassis during normal operation, and both are to be treated as HAZV components.
A ground fault detection circuit or device may be be used to identify that either the battery pack positive or battery pack negative have come into contact with the chassis or ELV part of the vehicle, and flag this as a fault to the driver or service technician. “
In the definition of terms; may indicates an option; should indicates a recommendation.
Must indicates mandatory. So the ground fault detection circuit is an option.
Checking resistance on a multimeter there is no leakage from either 72v pack positive or negative to 12v + or -. So my question is this. How do I check for the 29mA figure, as to what to use and where to connect? ( please keep it as simple as possible; I am a retired concretor and we are not known for high levels of intelligence)
