Project Description

Motor Protection Products

SEL understands how critical it is to provide continuous reliable motor protection. That is why SEL offers an industry-leading product with the most extensive warranty. SEL motor protection relays give customers a custom fit motor protection system with easy installation, for both retrofit and new application.

Related Products

SEL-710-5/SEL-710 Motor Protection Relay

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Protect asynchronous (induction) and synchronous motors with one SEL-710-5 Motor Protection Relay. New features include broken rotor bar detection and variable-frequency drive (VFD) support as well as options for arc-flash detection, differential protection, and synchronous motor protection.

SEL-849 Motor Management Relay

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The SEL-849 Motor Management Relay offers current-, voltage-, and thermal-based motor protection; arc-flash detection; and power metering. It also provides all basic motor protection features, including protection for the following conditions:

SEL-749M Motor Relay

The SEL-749M uses the latest enhancements in the SEL-patented thermal overload model to accurately track the heating effects of operating and cyclic overload currents. The relay offers all basic motor protection features, including short circuit, load loss, load jam, and frequent starting protection as well as imbalance current and phase-reversal protection.

SEL-701 Motor Protection Relay

The SEL-701 Motor Protection Relay provides locked rotor, running overload, and negative sequence current unbalance protection using a patented thermal model. The thermal element accurately tracks the heating effects of load current and current unbalance while the motor is accelerating and running. You can choose from three easy settings methods:

SEL-2600 RTD Module

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SEL-2600 RTD is a microprocessor-based module, which can measure and transmit data from up to 12 RTDs and a single contact status located in transformers, breakers, motors, generators, or other system apparatus.

Comparison

710
710-5
749M 701 849
Induction Motor Protection
Synchronous Motor Protection +
Feeder Protection
Breaker Failure Protection f f
Equipment Thermal Monitoring + + +
27/59 Under-/Overvoltage + + +
32/37 Directional/Underpower Elements + + + +
40 Loss-of-Field +
46 Current Unbalance
47 Phase Reversal
49 Thermal
50 (P,N,G) Overcurrent (Phase, Neutral, Ground)
50Q Negative-Sequence Overcurrent
51 (N,G) Time-Overcurrent (Neutral, Ground)
51 (P,Q) Time-Overcurrent (Phase, Neg. Seq.)
55 Power Factor + +
60 Loss-of-Potential + f f +
78 Out-of-Step +
81 Over-/Underfrequency + +
87 Current Differential +
Arc-Flash Detection +
Separate Neutral Overcurrent
Broken Rotor Bar Detection +
SELogic Control Equations/Remote Control Switches
Nonvolatile Latch Control Switches
Multiple Settings Groups
Breaker Wear Monitor
Event Report (Multicycle Data)/Sequential Events Recorder
Demand Meter
Load Profile Report
RTD (Resistance Temperature Detector) Inputs + + +
Ethernet +
IEC 61850 + +
DNP3 LAN/WAN +
Simple Network Time Protocol (SNTP)
Modbus TCP
Modbus RTU Outstation
Synchrophasors With IEEE C37.118 Protocol
Mirrored Bits Communications
DeviceNet + +
Accepts Wye or Open-Delta Voltage Transformers + + +
Standard Feature
+ Model Option
f This function may be created using settings