Title www.megger.com2Testing Charge Points for Electric Vehicles: A Step-by-Step Guide2Title www.megger.com22222TESTING CHARGE POINTS FOR ELECTRIC VEHICLES: A STEP-BY-STEP GUIDE WWW.MEGGER.COMIntroductionThe number of electric vehicles (EVs) in use is rapidly increasing worldwide, creating a growing demand for safe recharging facilities. This presents an excellent business opportunity for electrical contractors skilled in charge point installation, commissioning, and testing. This guide aims to fi ll the gaps, particularly in relation to testing.Before proceeding, consider the following points:1. EV Charger ScopeThis guide covers chargers for electric vehicles (EVs) and hybrids driven by an electric motor powered by a high voltage battery. It does not address the charging of low voltage batteries in vehicles powered by petrol or diesel engines.2. TerminologyThe equipment used for charging electric vehicles is commonly referred to as ‘charge points,’ ‘EV chargers,’ or ‘EV charge points.’ Technically, these terms are incorrect as the charger itself is often within the vehicle. A more accurate term is ‘electric vehicle supply equipment’ (EVSE), but for simplicity, ‘charge point’ is used throughout this document.3. Charger ModesCharge points are classifi ed into four ‘Modes’:Mode 1: Connects a domestic power outlet to the car with a simple lead. This mode lacks safety features and is illegal in many countries.Mode 2: In-line modules with basic control and protection capabilities, often provided by car manufacturers.Mode 3: The most common type, fi xed equipment providing a single- or three-phase AC supply to the vehicle.Mode 4: DC chargers used for high-power fast charging, requiring specialized equipment for testing and outside the scope of this document.4. Installation and Testing Standards The circuit feeding the charge point must be installed and tested according to international standards like IEC 60364 or local regulations such as BS 7671 in the UK before the charge point is connected.5. Testing Equipment This guide assumes the use of dedicated test equipment designed for charge points, including an electrical installation multi-function tester (MFT) and a charge point adaptor.Equipment for Testing Charge pointsTo test charge points (excluding Mode 4), you need:1. Electrical Test InstrumentUsed for general testing on electrical installations with extra features for testing unique protective devices in charge points, such as an electrical installation multi-function tester.2. Charge point Adaptor:Mimics a vehicle’s connection to the charger, offering basic safety tests like earthing checks and error condition simulations.A self-contained charge point checker can be used for post-installation testing and maintenance to verify the functionality and basic safety of the a charge point.However, these checkers do not offer the full range of functionality of the MFT and adaptor. Consequently, they are unsuitable for initial verifi cation of a newly installed charge point, but they are ideal for post-installation testing
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