SEL-651R-2 Advanced Recloser Control

New Features

Improved High-Impedance Fault Detection: Utilizes Arc Sense™ technology to detect low-current ground faults, with tuning over an accumulative period for better arming in varying load conditions.
Increased Time Dial Range for Recloser Curves: Expanded upper time-dial range from 2 to 30 for enhanced feeder coordination flexibility.
Intertie Protection and Control: Compliant with IEEE Standard 1547-2018 for DER interconnection.
Inverse-Time Voltage Elements: Combines definite-time and inverse-time voltage elements for faster fault operation and improved coordination.
Voltage-Controlled and Voltage-Restrained Time-Overcurrent Elements: Provides backup protection for DER applications with voltage-based time-overcurrent elements.

Key Features and Benefits

Single-Phase Tripping/Reclosing: Allows for phase-specific interruption and restoration, improving service for unaffected customers.
Multi-Recloser Interface: Supports control of multiple reclosers from different manufacturers via a single control cable.
Wide-Range Recloser Compatibility: Compatible with a broad range of reclosers, simplifying operation and training.
ACSELERATOR QuickSet® SEL-5030 Software: Facilitates easy configuration, custom application design, and template creation.
Low-Energy Analog (LEA) Inputs: Reduces costs and space with up to six LEA voltage inputs.
Enclosure Options: Available in dual-door or single-door enclosures, with options for painted cold-rolled steel (NEMA 3R) or painted type 304 stainless steel (NEMA 3RX) for various environmental conditions.
Ethernet Communications: Supports DNP, Modbus®, IEC 61850, FTP, and SNTP with a built-in web server for firmware upgrades.
Secure Ethernet Communications: Utilizes MACsec for confidential and integrity-protected communications.
Communications Flexibility: Offers multiple serial ports (EIA-232, EIA-485) and various Ethernet port configurations (fiber-optic, metallic).
Automatic Network Reconfiguration (ANR): Enhances reliability by isolating faulted sections and restoring service to unaffected areas.
Configurable Power Elements: Allows determination of power flow or VAR flow direction and magnitude.
Total Harmonic Distortion (THD): Monitors system power quality with harmonic metering up to the 16th harmonic.
Built-In Power Supply: Provides 40 W continuous auxiliary power for 12 Vdc accessories.

Functional Overview

The SEL-651R-2 Advanced Recloser Control integrates various protection and control elements, including:

Undervoltage (27, 271)
Overvoltage (59, 591)
Directional Power (32)
Frequency Window (81W)
Rate-of-Change-of-Frequency (81R)
Vector Shift (78VS)
Autosynchronism (25)
Overcurrent (50, 51, 50N, 51N, 50G, 51G)
Reclosing (79)
Harmonic Blocking (HBL2)
Breaker Wear Monitor (BRM)
Fault Locator (LOC)
Sequential Events Recorder (SER)
High-Accuracy Metering (MET)
Operator Interface (HMI)
Digital Fault Recorder (DFR)
Phasor Measurement Unit (PMU)
Load Data Profiling (PQM)
Load Encroachment (LDP)
SEL AST™
Best Choice Ground (50G)

Control Cable and Power Input

The control cable connects the SEL-651R-2 to the recloser, transmitting secondary current, recloser status, and trip/close signals. Voltage inputs can be connected on both sides of the recloser for schemes like Automatic Network Reconfiguration and synchronism check. The control power input can be ordered for 120 Vac, 230 Vac, 125 Vdc, or 48 Vdc, with the 120 Vac option including a GFCI outlet.

Communications

The SEL-651R-2 supports various communication options, including USB, EIA-232, EIA-485, and multiple Ethernet configurations (10/100BASE-T metallic, 100BASE-FX optical). It enables communication with computers, SCADA systems, and other devices using protocols such as DNP, Modbus, IEC 61850, and IEEE C37.118.

Applications

The SEL-651R-2 is ideal for various applications, including:

Automatic Network Reconfiguration: Enhances system reliability by isolating faulted line sections and restoring service.
Distributed Energy Resource (DER) Interconnection: Facilitates the interconnection of microgrids and DERs to area electric power systems, supporting autosynchronism control.
Single-Phase Tripping/Reclosing: Improves system reliability by isolating faults to specific phases, minimizing disruption to unaffected customers.

Protection Features

The SEL-651R-2 offers comprehensive protection features:

Overcurrent Protection: Supports a combination of fast and delay curves for phase, ground, and negative-sequence overcurrent protection.
Load Encroachment: Logic prevents phase overcurrent element operation under high load conditions.
Directional Elements: Provides directional control for phase, ground, and negative-sequence overcurrent elements, increasing sensitivity and security.
Loss-of-Potential Logic: Supervises directional elements by detecting loss of potential fuses.
Reclosing: Supports up to four reclose operations with customizable logic.
Power Elements: Four independent directional three-phase power elements for overpower, underpower, reverse power, and VAR control.
Harmonic Blocking Elements: Secure protection during transformer energization by blocking elements sensitive to inrush currents using second-harmonic blocking.
Fast Rate-of-Change-of-Frequency Protection: Detects islanding conditions with a faster response than standard frequency elements.
Vector Shift Protection: Detects islanding conditions by monitoring voltage waveform angle changes.

Monitoring and Metering

The SEL-651R-2 provides advanced monitoring and metering capabilities:

Event Reporting and Sequential Events Recorder (SER): Simplifies post-fault analysis and troubleshooting with detailed event data and SER entries.
Synchrophasor Measurements: Supports IEEE C37.118 protocol for sending synchrophasor data to SEL applications for wide-area system monitoring and analysis.
Voltage Sag/Swell/Interrupt (VSSI) Report: Captures power quality data related to voltage disturbances.
Recloser Wear Monitor: Measures recloser wear based on current and close-to-open operations.
Load Profile: Records up to 15 selectable analog quantities at periodic rates for load analysis.
Metering: Offers extensive metering capabilities, including instantaneous, fundamental, RMS, and harmonic quantities.

Additional Features

The SEL-651R-2 includes 24 programmable status and trip target LEDs and 12 programmable operator-control pushbuttons for customizable front-panel interface. Optional tricolor LEDs and configurable labels enhance customization.

Specifications

The SEL-651R-2 meets stringent specifications for compliance, AC and voltage inputs, power supply, communications, and environmental conditions. It is designed and manufactured under an ISO 9001 certified quality management system.

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