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EV.8.6 Insulation Monitoring Device - IMD

EV.8.6.1 The vehicle must have an Insulation Monitoring Device (IMD) installed in the Tractive System.

EV.8.6.2 The IMD must be a Bender ISOMETER® IR155-3203 or IR155-3204 (refer to website) or equivalent IMD approved for automotive use.

EV.8.6.3 The response value of the IMD must be set to 500 Ohm / Volt or higher, related to the maximum Tractive System operation voltage.

EV.8.6.4 The IMD must monitor the Tractive System for:

a. An isolation failure

b. A failure in the IMD operation

This must be done without the influence of any programmable logic.

EV.8.6.5 If the IMD detects one or more of the conditions of EV.8.6.4 above the IMD must:

a. Open the Shutdown Circuit EV.8.2.2

b. Turn on the IMD Indicator Light EV.8.6.6 The IMD Indicator Light must be:

a. Color: Red

b. Clearly visible to the seated driver in bright sunlight

c. Clearly marked with the lettering “IMD”