ART 3 - Automatic Three Phase Current and Voltage Relay Test System This protection relay test set is a commissioning substation tool to test all type of relays. The extreme robustness and longevity can grant the customer the perfect solution when high reliability on substation commissioning and maintenance is requested. • 3-Phase current and voltage relay test system • Output: 3 x I 0...50 A; 3 x V 0...250 V; 1 x V DC 0...260 V • High burden relay test set • Designed for testing electromechanical, solid state and numerical relays • Universal testing capability for all relays • Transient playback and harmonics