SEL-551C Overcurrent/Reclosing Relay

Products for Protection, Monitoring, Control, Automation, and Metering

SEL-551C

Overcurrent/Reclosing Relay

Comprehensive overcurrent protection, multiple-shot reclosing, and new I/O mix with optional front and rear communications in one compact relay

Complete Overcurrent Protection
Protect lines and equipment using a sensitive and secure mix of phase, negative-sequence, and ground overcurrent elements. Provide high-speed operation, even with severe CT saturation, using the SEL Adaptive Overcurrent Element.
Multiple-Shot Reclosing With Sequence Coordination
Program up to a four-shot reclose sequence with reclose initiate supervision, skip shot, and stall open interval timing.
ACSELERATOR^® QuickSet SEL-5030 Software
Helps speed relay application by allowing you to develop relay settings off-line, program SELOGIC^® control equations, and analyze post-fault event reports.
Integration
Integrate into industrial protection and control schemes with Modbus^® RTU protocol. Order the rear serial communications port as either EIA-232 or EIA-485. Optional front EIA-232 port allows easy connection even while using EIA-485 on the rear port.
Field-Proven Hardware With Optional Features
The six inputs and three outputs are fully programmable to meet your application needs. A wide operating temperature range (–40° to +85°C) allows for installation in a control house or outdoor enclosure.
Advanced Programmable Logic and Local/Remote Controls
Configure traditional or advanced protection and control schemes. Use edge-triggers or latches within the SELOGIC^® control equations for advanced control.

SEL accessories simplify operation and enhance the flexibility of SEL products.

Add independent breaker control to any relay. The SEL-9510 Control Switch Module easily installs in panel or rack locations for independent local control and status indications.

SEL-9510 and 500 series

SEL provides options to help you efficiently and safely commission and test these relays.
	Streamline commissioning by using the SEL-4391 Data Courier™ to gather event reports and install enhancements.
	Improve safety, save time, and reduce costs with SEL-4600 Series Test Blocks and Plugs. Use the SEL recommended standard block and plug configurations for SEL-551C relays.

Panel-mount or rack-mount hardware package.
Rear port EIA-232 or EIA-485 serial communications; ports include a demodulated IRIG-B time-code input.
Optional front EIA-232 port provides easy access to relay settings and reports, even when rear port is configured as EIA-485 Modbus RTU.
SEL-5601 Analytic Assistant Software: Display oscillograms and vector diagrams and analyze event reports.
SEL-5040 Power System Report Manager Software: Automatically gather relay event reports on your PC and manage them with a database.
Conformal Coating—Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
Learn more about conformal coating.

SEL Terminal Adapter C675

SEL Terminal Adapter C675

The SEL Terminal Adapter (C675) is included when ordering the SEL-551C with the EIA-485 rear port option. The terminal adapter with quick connector makes connecting EIA-485 communication leads fast and easy.

Budgetary Retail, Quantity 1: $840
Fully Optioned Price: $1,224
(Prices displayed are for planning purposes and are subject to change. Contact your SEL sales representative today for a quote on configurations and quantities to meet your needs.)