Protective Functions
• Sync-check with Phase Angle, ∆V and ∆F with dead line/dead bus options (25)
• Phase undervoltage (27) protection
• Ground undervoltage (27G) protection
• Dual-setpoint, single or three phase, directional power detection that can be selected as over/
under power protection (32)
• Dual-zone, offset-mho loss-of-field for generator protection (40)
• Sensitive negative sequence overcurrent protection and alarm (46)
• Negative sequence overvoltage (47)
• Inverse time residual overcurrent (51N)
• Phase overcurrent with voltage restraint/control (51V) protection
• Phase overvoltage (59) protection
• Ground overvoltage (59G) protection
• Peak overvoltage (59I) protection
• VT fuse-loss detection and blocking (60FL)
• Reconnect enable for intertie protection (79)
• Four-step over/under frequency (81) protection
Standard Features
• 2 programmable outputs, 2 programmable inputs, and 1 self-test output
• Oscillographic recording (COMTRADE file format)
• Time-stamped sequence of events recording for 32 events
• Metering of Voltage, Current, real and reactive Power, Power Factor, Frequency, and Positive
Sequence Impedance
• One RS-232 port (COM1) on front and one RS-232 or 485 port (COM2) on rear
• M-3810A IPScom for Windows Communications Software
• MODBUS protocol
• Supports both 50 and 60 Hz applications
• Accepts 1 A or 5 A rated CT inputs
• Relay voltage inputs can be directly connected (no VT required) for voltages ≤ 480 Vac
• Continuous Self-Diagnostics
Optional Features
• M-3801D IPSplot PLUS Oscillograph Analysis Software
• Horizontal (Option H1) and Vertical (Option V1) panel mount available (see dimensions Figure 9)
• 19" Rack Mount (Option H2) available (see dimensions Figure 8)
• Surface Mount (Option S1) available (see dimensions and connections Figure 10)
• Adapter Plate available for M-0290 and M-0296 Pride Protection Relay replacement (see
dimensions Figure 11)