SEL Motor Protection Relay

SEL 710 SEL Motor Protection Relay

SEL recommends selecting the SEL-710-5 SEL Motor Protection Relay in place of the SEL-710. The SEL-710-5 offers additional protection and communications options, such as incipient fault detection, vibration monitoring, and EtherNet/IP. It is also available with a color touchscreen display.

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Features

  • Calculate the thermal energy in the motor to determine maximum safe start times with full motor protection. Accurate temperature tracking also minimizes the time needed between starts.
  • Use the four programmable pushbuttons on the front panel for quick, personalized control, including factory default start and stop functions.
  • Provide overcurrent, thermal overload, undercurrent, current unbalance, current differential, phase loss, ground fault, and over- or underfrequency protection and much more.
  • Choose from single or dual copper or fiber-optic Ethernet, Modbus® TCP,
  • IEC 61850, Modbus Serial, EIA-232, EIA-485, Telnet, and FTP protocols. Pick
  • one or multiple connections, including multiple Modbus sessions for the custom configuration of your application.
  • Apply the SEL-710 Motor Protection Relay in extreme conditions, with an operating temperature range of –40° to +85°C (–40° to +185°F). The SEL-710 is designed and tested to exceed applicable standards, including those for
  • vibration, electromagnetic compatibility, and adverse environmental conditions.

Application

  • Motor protection and control for a variety of drives
  • Application-specific standard configurations resulting in a shorter relay setup and commissioning time
  • Preconfigured solutions for utility distribution and industrial applications

 

Specification

AC Current Inputs ：5 A or 1 A phase and 5 A, 1 A, or 2.5 mA (high sensitivity) neutral, depending on model

AC Voltage Inputs ：300 Vac continuous, 600 Vac for 10 seconds

Output Contacts：The relay supports Form A, B, and C outputs.

Pickup and Dropout Times  ：Pickup time:

≤8 ms for standard output contact

<50 μs (resistive load) for hybrid output contact

Dropout time: ≤8 ms for standard output contact ≤8 ms (resistive load) for hybrid output contact

Optoisolated Control Inputs ：DC/AC control signals: 250, 220, 125, 110, 48, or 24

Frequency and Phase Rotation:   System frequency: 50, 60 Hz

Phase rotation: ABC, ACB

Frequency tracking: 20–70 Hz

Power Supply:  110–250 Vdc or 110–240 Vac

Input voltage range: 85–300 Vdc or 85–264 Vac

24–48 Vdc

Input voltage range: 19.2–60 Vdc

Operating Temperature:  –40° to +85°C (–40° to +185°F)

 

 

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