Single Phase Transmission Line Trainer is an SSI India product in the Electrical Lab category. Key specifications include SKU: PPSP-385. TECHNICAL SPECIFICATIONS Power Supplies: AC Power Supply 0-230V AT 4A (Optional) Operated on Mains power 230V, 50Hz +10% Digital/Analog Meters: Voltmeter 2 Nos. Over Current Relay (For Overload Protection) 4A