www.megger.com 3Testing Charge Points for Electric Vehicles: A Step-by-Step Guide3www.megger.com 33333WWW.MEGGER.COM ensures the EV doesn’t drive off while charging. The CP signal provides information about the charging process status. Test equipment should simulate these CP states:■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 requiredTesting Step-by-StepPart 1 – Charge point Supply Connection Inspection and Testing 1. Visual Inspection and Testing: Inspect and test the installation up to the point of connection of the charge point, ensuring compliance with local regulations. Essential tests include loop impedance, voltage drop, continuity of bonding conductor, cable insulation, and polarity (phase sequence for three-phase chargers), and RCD testing.Part 2 – Charge point Test Adaptor Connection 1. Visual Inspection: Inspect the charge point for physical damage. Replace or repair damaged items before proceeding.and maintenance. A separate step-by-step guide covering the use of this kind of checker is available. The remainder of this document assumes that tests are being carried out using an MFT plus a charge point adaptorThe MFT should be able to provide, as a minimum, these control and test functions:■Proximity Pilot control■Control Pilot control■Protective Earth (PE) continuity■Protective conductor resistance measurement (RPE)■Voltage drop■Continuity■Insulation resistance■Polarity■Phase rotation (for three-phase charge points)■RCD (GCFI) operation■RDC operation■Earth (ground) loop impedanceControl SignalsTwo control signals – Proximity Pilot (PP) and Control Pilot (CP) – are used for communication between the vehicle and the charge point. The PP signal indicates a vehicle connection and
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