M-3520 Intertie Protection PROTECTION
Intertie Protection PROTECTION
- Integrated Protection System for DR/DG Intertie, Providing:
- Loss of parallel utility operation protections
- Abnormal power flow protections
- Comprehensive suite of phase and ground fault backed protections
- Abnormal operating protections
- Reconnect and Sync Check functions
- Microprocessor-based Intertie Protection Relay integrates protection, metering, monitoring and waveform capture
- Provides 18 base protective relay functions and 3 optional protective functions
- Local and remote serial communications capabilities, plus IRIG-B interface
Standard Functions
- Sync check with Phase, ΔV and ΔF with deadline/deadbus options (25)
- Phase undervoltage (27) protection
- Neutral over/undervoltage (59G/27G) protection
- Sensitive dual-setpoint, reverse power detection (32)
- Sensitive negative-sequence overcurrent protection and alarm (46)
- Negative sequence voltage (47)
- Instantaneous overcurrent (50) protection
- Instantaneous neutral overcurrent (50G) protection
- Three-phase inverse time overcurrent (51V) with voltage control/voltage restraint
- Neutral inverse time overcurrent (51G) protection
- Phase overvoltage (59) protection
- Peak overvoltage (59I) protection
- VT fuse-loss detection and blocking (60FL)
- Directional inverse and definite time phase overcurrent (67)
- Directional inverse and definite time neutral overcurrent (67N)
- Reconnect enable (79)
- Over/Underfrequency (81 O/U)
Optional Functions
- Dual–zone phase distance protection for phase fault backup (21)
- Out of Step (78)
- Rate of change of frequency (81R)
- Eight programmable outputs and six programmable inputs
- Oscillograph recording
- 32-target storage
- Metering of all measured parameters
- Three communications ports (two RS-232, one RS-485)
- Standard 19" rack-mount design
- Removable printed circuit board and power supply
- Both 50 and 60 Hz models available
- Both 1 and 5 Amp rated CT inputs available
- M-3822 IPScom® Communications Software
- IRIG-B time synchronization
Optional Features
- Redundant power supply
- M-3915 Target Module
- M-3931 Human-Machine Interface Module
- M-3801D IPSplot® PLUS Oscillograph Analysis Software
- 4-Wire RS-485 Connection
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