Protective Relays: Product Families
A protective relay watches current, voltage and other signals on a circuit and trips a breaker when they show a fault or an abnormal condition. Older relays are electromechanical. Current families are digital and combine protection, metering, communications and event records in one device.
Feeder and overcurrent relays protect distribution circuits, motor protection relays add thermal and start-time functions, and multifunction digital relays cover several applications with a configurable set of elements. Buyers of surplus or replacement relays normally ask for the family and model, the current and voltage input ratings and the control power. Lifecycle notes matter here, because a discontinued relay often has a named successor.
38 product families from 8 manufacturers
Feeder Protection
SEL
SEL-751
Listed as current
Feeder protection relay for industrial and utility radial and looped circuits, with arc-flash mitigation and high-impedance fault detection.
- Rated range
- Conventional 300 V phase voltage card or LEA 8 Vrms sensor inputs; 200 mA sensitive neutral option
- Also listed under
- Digital Protective Relays, Overcurrent Relays
SEL
SEL-751A
Earlier feeder protection relay with time-overcurrent, autoreclosing, voltage and frequency elements and optional arc-flash detection.
- Rated range
- Power supply 24-48 Vdc or 110-250 Vdc / 110-240 Vac
SEL
SEL-351S
Distribution feeder protection system with directional overcurrent, breaker monitoring and voltage sag/swell reporting.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
ABB
Relion REF615
Dedicated feeder protection and control relay, 615 series, withdrawable unit.
- Rated range
- 0.2/1 A or 1/5 A CT inputs; 60-210 V AC voltage inputs; 50/60 Hz
- Also listed under
- Overcurrent Relays
ABB
Relion REF620
Feeder protection and control relay from the Relion 620 series for utility and industrial distribution networks.
- Rated range
- 0.2/1 A or 1/5 A CT inputs; 50/60 Hz
- Also listed under
- Digital Protective Relays
ABB
Relion REF630
Comprehensive feeder protection and control relay for utility and industrial distribution substations, Relion 630 series.
- Rated range
- 0.1/0.5 A or 1/5 A CT inputs; 50/60 Hz
- Also listed under
- Digital Protective Relays
ABB
Relion REJ603
Listed as current
Self-powered (CT-powered) feeder protection relay for ring main units and secondary distribution where auxiliary supply is unavailable.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
GE Vernova (Multilin)
Multilin 850
Listed as current
Feeder protection and bay controller for single or dual underground/overhead feeders, with retrofit kits from the 735 and 750/760.
- Rated range
- Ratings not stated
- Also listed under
- Digital Protective Relays
GE Vernova (Multilin)
Multilin 750/760
DiscontinuedGE recommends the Multilin 850
Draw-out digital feeder management relay for primary protection of distribution feeders.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
GE Vernova (Multilin)
Multilin F650
Feeder protection, control and automation relay with graphical LCD for feeder and bay-control use.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin F35 (UR family)
Multi-feeder protection, control and metering relay covering up to five or six feeders in one unit.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin MIF II
DiscontinuedGE suggests P14N and 350
Digital feeder relay in the M II family with overcurrent, breaker control and recloser.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
GE Vernova (Multilin)
Multilin 350
Listed as current
Feeder protection, control and management relay for low, medium and high voltage systems, 3 Series platform.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
Siemens
SIPROTEC 5 7SJ82
Listed as current
Compact overcurrent and feeder protection for feeders, lines and capacitor banks in MV and HV systems.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
Siemens
SIPROTEC 5 7SJ85
Listed as current
Modular overcurrent and feeder protection for feeders, lines and capacitor banks.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
Schneider Electric
MiCOM P14x
Feeder management relay range for medium-voltage distribution.
- Rated range
- Ratings not stated
- Also listed under
- Overcurrent Relays
Schneider Electric
Sepam series 40
Discontinued
Digital current and voltage protection relay for distribution systems.
- Rated range
- Ratings not stated
- Also listed under
- Digital Protective Relays, Overcurrent Relays
Beckwith Electric
M-7651A D-PAC
Listed as current
Protection, automation and control device for feeders, switchgear, interties and small generators, with arc-flash detection and bay control.
- Rated range
- 4 current inputs, 8 voltage inputs (standard or low-energy analog)
- Also listed under
- Digital Protective Relays
Basler Electric
BE1-FLEX
Listed as current
Configurable protection, automation and control platform usable for distribution feeder, motor, transformer, generator and other applications.
- Rated range
- Ratings not stated
- Also listed under
- Digital Protective Relays, Overcurrent Relays
Rockwell Automation (Allen-Bradley)
Bulletin 857
DiscontinuedRockwell points to the E300/E200
Medium-voltage motor and feeder protection relay line.
- Rated range
- Ratings not stated
- Also listed under
- Motor Protection
Digital Protective Relays
Siemens
SIPROTEC 5 7SX82
Listed as current
Universal protection device covering most medium-voltage and distribution tasks with customizable functions.
- Rated range
- Ratings not stated
Siemens
SIPROTEC 5 7SX85
Listed as current
Modular universal protection device with functions tailored per application.
- Rated range
- Ratings not stated
Siemens
SIPROTEC 5 7SX800
Listed as current
Compact universal relay for medium-voltage feeders, lines and motors.
- Rated range
- Ratings not stated
Siemens
SIPROTEC 5 7SY82
Listed as current
Universal MV protection device with a low-power instrument transformer input combining protection, automation and control.
- Rated range
- Ratings not stated
Schneider Electric
PowerLogic P3 (formerly Easergy P3)
Listed as current
Compact medium-voltage protection relays (P3U, P3F, P3M) with arc-flash option, LPCT/LPVT support and IEC 61850.
- Rated range
- Ratings not stated
Motor Protection
GE Vernova (Multilin)
Multilin 869
Listed as current
Motor protection and management relay for medium and large induction and synchronous motors, with a synchronous-motor module.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin 859
Listed as current
Fixed-mount motor protection system for medium and large induction motors; direct replacement for the 169, 269/269Plus and 369.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin 469 (SR469)
DiscontinuedGE recommends 859 or 869
Motor protection relay for medium and large motors with thermal modeling; retrofit kits to the 869 exist.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin 369
DiscontinuedGE recommends 859
Motor protection relay for medium-sized AC motors, with RTD monitoring for up to 12 sensors.
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin 339
Listed as current
Motor protection system for small to medium LV or MV motors (pumps, conveyors, fans, compressors).
- Rated range
- Ratings not stated
GE Vernova (Multilin)
Multilin 239
DiscontinuedGE lists 339, 859, 869, P24 as alternatives
Compact motor protection relay with thermal overload, phase and ground fault protection.
- Rated range
- Ratings not stated
ABB
Relion REM615
Motor protection and control relay from the 615 series for asynchronous motors and their drives.
- Rated range
- 0.2/1 A or 1/5 A CT inputs; 50/60 Hz
SEL
SEL-710-5
Motor protection relay for induction and synchronous motors with touchscreen, broken-rotor-bar detection and VFD support.
- Rated range
- Supply 24-48 Vdc or 110-250 Vdc/Vac; see the SEL flyer for other ratings
Siemens
SIPROTEC 5 7SK82
Listed as current
Motor protection device for small and medium motors (thermal overload, start-time monitoring, restart inhibit).
- Rated range
- Ratings not stated
Siemens
SIPROTEC 5 7SK85
Listed as current
Modular motor protection device for motors of all sizes.
- Rated range
- Ratings not stated
Rockwell Automation (Allen-Bradley)
Bulletin 193/592 E300 and E200
Listed as current
Electronic overload relays; E300 is the networked and E200 the non-networked model, modular design.
- Rated range
- Ratings not stated
Overcurrent Relays
Basler Electric
BE1-951
DiscontinuedReplaced by BE1-FLEX
Overcurrent protection, automation and control system.
- Rated range
- Ratings not stated
Schneider Electric
PowerLogic P3
Listed as current
MV protection relays from overcurrent to advanced protection.
- Rated range
- Ratings not stated
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Ratings and lifecycle notes come from the manufacturer pages linked on each entry.
Manufacturer and product names are trademarks of their respective owners and are used only to identify equipment.