Types KD-10 and KD-11 - Compensator Distance Relays
REL 512 Numerical Transmission Line Protection System
REL 300 (MDAR) - Numerical Transmission Line Protection
REL 301and REL 302 - Numerical Transmission Line Protection System
MDART Blocking/Unblocking Relay System
REL-350 - HIGH SPEED SEGREGATED PHASE COMPARISON LINE PROTECTION SYSTEM
Type HCB-1 - High-Speed Pilot Wire Relay
Type LCB II - High-Speed Current Differential Relay System
Type REL 356 - Current Differential Line Protection System
Type CF-1 Frequency Relays- for under or over frequency protection of synchronous machines
Types BL-1 and DT-3 - Temperature Relays
Type KF - High-Speed Underfrequency Relay
Types TK, TD-4, TD-5, TD-50 and TD-52 - Timing Relays
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