Title www.megger.com4A STEP-BY-STEP GUIDE FOR CHECKING CAR CHARGERS FOR ELECTRIC VEHICLES4A STEP-BY-STEP GUIDE FOR CHECKING CAR CHARGERS FOR ELECTRIC VEHICLES WWW.MEGGER.COMControl signalsTwo control signals – proximity pilot (PP) and control pilot (CP) - are used to communicate between the vehicle and the car charger. The PP signal indicates to the car charger that a vehicle is connected. One of its primary functions is to ensure that the EV does not drive off while charging is in progress. The PP signal can also be used to indicate the maximum charging rate applicable to a particular combination of car charger and EV. Car charger checkers need to be able to simulate PP signals.The CP signal provides information about the status of the charging process, and for the purposes of testing a car charger, the test equipment needs to simulate these CP states:: ■Displays the maximum current available to be drawn by the vehicle from the charging point ■State A – no vehicle connected ■State B – vehicle connected but not ready to charge ■State C – vehicle connected and ready to charge; ventilation not required ■State D – vehicle connected and ready to charge; ventilation requiredEquipment for testing car chargersThis guide covers only the use of the Megger EVCC300, which is a self-contained and simplified instrument that can be used to quickly and conveniently verify the functionality, configuration and basic safety of car chargers. For comprehensive testing of the installation of the charger to the electric network of car chargers and for certification testing, a multifunction installation tester (MFT) and a suitable car charger adaptor are needed. Other guides are available from Megger to cover the use of this type of equipment.
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