SEL-751A Feeder Protection Relay

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

SEL-751A

Feeder Protection Relay

The SEL-751A is the right solution for industrial and utility feeder protection, with flexible I/O and easy mounting options.

Complete Feeder Protection
Maximize control scheme flexibility with time- and instantaneous-
overcurrent, overvoltage, undervoltage, and frequency elements.
Convenient Controls
Use the four programmable pushbuttons on the front panel for quick, personalized control.
Easy Communications
Choose from Ethernet or serial communications and several protocols, including MIRRORED BITS® and IEC 61850. Pick a single Modbus^® TCP or multiple Modbus Serial sessions for custom configuration of your application.
Expanded SELOGIC^® Control Equations
Use math and logic combinations of analog and digital values for customized applications. Adapt system control based on prefault conditions. Scale analog values and latch momentary inputs for SCADA retrieval.
Rugged Design
Rely on the industry’s widest ambient temperature operating range, –40° to +85°C (–40° to +185°F).
Automatic Notification
Alert key personnel to problems automatically with direct SEL-3010 Event Messenger support.

Easy Installation
Easily install into existing locations using available retrofit kits and mounting adapters, with no cutting or drilling.
Flexible Design
Choose from many installation and integration options with a small form factor and slide-in expansion cards.

Customize front-panel pushbutton operation and LEDs, or use default breaker trip/close functions.
Personalize LCD messages using event-driven display point settings.
Create an integrated control system with a variety of I/O and communications options.
Use the programmable control logic and integration features with a communications link for control and protection of remote substations.
Use comprehensive reporting to understand events, schedule maintenance, detect unfavorable trends, modify loads, and satisfy information requirements of supervisory systems.
Include RTD inputs as part of system integration or to bias protection.
Remediate arc-flash hazards with instantaneous group settings.
Analyze overcurrent protection system performance using built-in Sequential Events Recorder (SER).
Use ACSELERATOR® QuickSet™ SEL-5030 or SEL-5010 Relay Assistant Software to manage your relay settings.
Install protection where it is needed without special enclosures or ventilation systems. Class 1, Division 2 certification allows the SEL-751A in locations that may be adjacent to hazardous gasses, vapors, or liquids.

Retrofit kits

Projection Mounting Collars available in 45 and 90 mm.
Projection Mounting Collars Instruction Sheet
Find other mounting options with the SEL Mounting SELECTOR

Flexible I/O for Local Control and System Applications
The base system includes three digital outputs and two digital inputs. There are three card slots for optional SELECT I/O cards, including the following:

Four digital inputs (DI) and four digital outputs (DO)
Four digital inputs (DI) and four fast, high-current interrupting digital outputs (DO)
Four digital outputs (DO), three digital inputs (DI), and one analog output (AO)
Four analog inputs (AI) and four analog outputs (AO)
Eight analog inputs (AI) for dc process values
Eight digital inputs (DI)
Three ac voltage inputs
Ten RTD inputs

Integrate Communications

Choose from Ethernet, fiber-optic serial, EIA-232, EIA-485, Modbus Serial, MIRRORED BITS, DeviceNet™, Modbus TCP, Telnet, IEC 61850, and File Transfer Protocols.

Retrofit Replacement Kits

Replace existing feeder protection with SEL-751A direct replacement kits. These kits provide the parts needed to easily replace many older feeder relays with the SEL-751A. (View all kits and dimension drawings.)

Find other mounting options with the SEL Mounting SELECTOR.

Conformal Coating

Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
Learn more about conformal coating.

SEL provides options to help you efficiently and safely commission and test these relays.
	Streamline commissioning by using the SEL-4391 Data Courier™ to send and retrieve settings, gather event reports, and install enhancements.

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 Front single mount

Budgetary Retail, Quantity 1: $950
Fully Optioned Price: $3,380
(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.)