The NRTS-2 Network Relay Test System consists of the necessary single-phase and three-phase ac current and voltage sources to calibrate network relays accurately and efficiently. The system is designed to accommodate General Electric types CAN, CAL, CHN, CHL and SSNPR, Westinghouse types BN, CNJ, CN-33 and MPCR for both CM and CMD protectors, and various models of ETI, Cutler-Hammer and Tempo relays for General Electric and Westinghouse network protectors.