The SEL-651R offers exceptional protection and communications capabilities for Automatic Network Reconfiguration, single- and three-phase tripping, and other distribution automation needs. The SEL-651R is the first recloser control to support IEEE 1547-2018 and fast islanding detection for distributed energy resource (DER) interconnections. It also has unique capabilities to detect inrush conditions with a second-harmonic-blocking element and detect downed conductors with optional Arc Sense technology (AST). These capabilities help you maintain reliable service to as many customers as possible in the event of a fault.
Customer Outage Minimization—Reduce system and customer impacts with single- and three-phase tripping and reclosing. You can improve reliability by maintaining service to customers who are not on the faulted phase of the feeder.
Communications-Assisted Protection Schemes—Integrate the SEL-651R into either Ethernet- or serial-based communications networks with standard DNP3 and Modbus protocols or optional IEC 61850. You can use communications for local and remote engineering access, SCADA, real-time protection and control, loop restoration, islanding detection, blocking, and fast bus tripping schemes.
High-Impedance Fault Detection—Detect downed conductors and high-impedance faults with the optional AST. Learn more about this exciting technology. Also, see how high-impedance fault detection can accelerate your wildfire mitigation plans.
Distributed Generation Protection—Protect both the utility and the independent power producer with one low-cost device. You can control DER interconnections with IEEE 1547-2018 protection and synchronization and innovative SEL fast islanding detection.
Inrush Detection—Detect transformer energization or motor startup, and block tripping for inrush conditions with a second-harmonic blocking element. The harmonic detection element lets you block selected tripping elements until the inrush subsides.
Load Shedding—Use underfrequency and undervoltage elements to implement basic load-shedding schemes. For more advanced load-shedding schemes, rate-of-change-of-frequency (ROCOF) elements can shed load for increasing or decreasing frequency.
Speed Up Distribution Protection—Combine the SEL-FT50 and SEL-FR12 Fault Transmitter and Receiver System with the SEL-651R for more intelligent protection. The SEL-FT50 Fault Transmitters, located on branches, laterals, and the main line, will wirelessly communicate the fault location to the SEL-651R in 6 ms. This allows both fast tripping for main-line faults as well as fuse-saving and fuse-blowing schemes on the same feeder.
64 SELogic variables replace traditional panel switches with 32 latching, 16 local, and 32 remote control points
Built-in synchrophasor measurements for real-time electrical quantities
Standard six voltage inputs with PT and low-energy analog (LEA) options for measurements on both sides of the recloser
Standard multisession Modbus TCP and DNP3 and optional IEC 61850 easily integrate with existing systems
Standard dual copper Ethernet ports and optional single or dual fiber ports for improved communications
Two standard EIA-232 ports, an EIA-485 port, and a USB port provide several communications options
Navigation controls make information readily accessible
Optional software-programmable tricolored LEDs for improved status indication
Programmable control pushbuttons and configurable labels for ease of operation
EIA-232 front serial port provides local access
Single-door control option shown