This test is a simulation of load dump transient, occurring in the event of a discharged battery being disconnected while the alternator is generating charging current and with other loads remaining on the alternator circuit at this moment; the load dump amplitude depends on the alternator speed and on the level of the alternator field excitation at the moment the battery is disconnected.
The pulse shape and parameters for an alternator with no centralized load dump suppression (pulse 5a).
The pulse shape and parameters for an alternator with centralized load dump suppression (pulse 5b).
The EMC shop has a variety of solutions for ISO 7637 Load Dump Pulse 5a, 5b, 7 compliance.
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