The EM-500-2 demonstrates the operation of automotive charging system and is fitted with internal electronic voltage regulator. It contains a variable speed drive to allow the adjustment of engine speed similar to operation of real vehicle. The alternator can accommodate a load current of 25A to demonstrate the full load charging characteristics and allows the regulator to run at full capacity. Easy to use and operate, it provides students with safe platform to learn the correct operation and testing procedure of automotive charging system with internal regulation. It is also equipped with built-in voltmeter and ammeter as well as electrical test points for diagnosis.