Benefits of SEL-700G

The SEL-700G family of protection relays provides unsurpassed protection, integration, and control features in a
flexible, compact, and cost-effective package.
➤ Basic Generator Protection Features (SEL-700G0):
➢ Ground differential
➢ Sensitive restricted earth fault
➢ Thermal overload
➢ Phase, negative-sequence, residual-ground, and
neutral-ground overcurrent elements for backup
➢ Residual-ground and neutral-ground timeovercurrent elements
➢ Directional residual-ground and neutral-ground
overcurrent elements
➢ Current unbalance element
➢ Voltage-controlled, voltage-restrained timeovercurrent element for backup protection
➢ Breaker failure protection for three-pole breaker
➢ Under- and overvoltage elements
➢ Inverse-time over- and undervoltage elements
➢ Loss-of-potential element
➢ Volts/hertz or overexcitation protection
➢ Directional power elements
➢ Loss-of-field
➢ Over- and underfrequency protection elements
➢ Off-frequency time accumulators
➢ Rate-of-change-of- frequency elements
➢ Vector shift elements for islanding detection
➢ Inadvertent energization protection
➢ RTD protection (requires internal or external
SEL-2600 RTD option)
➢ Field ground using an SEL-2664 Field Ground
Module.
➤ Optional Generator Protection Features (SEL-700G0+, SEL-700G1, SEL-700G1+):
➢ Generator synchronism-check elements
➢ Synchronism-check under- and overvoltage
elements
➢ Inverse-time over- and undervoltage elements
➢ Autosynchronism
➢ Synchroscope
➢ Backup compensator distance elements
➢ Out-of-step elements
➢ Vector shift elements for islanding detection
➢ 100% stator ground protection elements
➢ Dual-slope current differential protection with
harmonic blocking and restraint elements to
provide sensitive and secure protection.
➢ The high-security mode provides additional
security against CT saturation during external
events including external transformer
energization, external faults, etc.
➤ Intertie Protection Features (SEL-700GT):
➢ Phase, negative-sequence, and residual-ground
overcurrent elements for overcurrent, timeovercurrent, and directional overcurrent
protection
➢ Breaker failure protection for three-pole breaker
➢ Under- and overvoltage elements
➢ Inverse-time over- and undervoltage elements
➢ Loss-of-potential element
➢ Directional power elements
➢ Over- and underfrequency protection elements
➢ Rate-of-change-of-frequency elements
➢ Vector shift elements for islanding detection
➢ Tie synchronism-check elements
➢ Synchroscope
➢ RTD protection (requires internal or external
SEL-2600 RTD option).
➤ Optional Intertie Protection Features (SEL-700GT+). Addition of basic generator protection features, as shown
above for the SEL-700G0, to create intertie and generator protection. The relay also includes generator
synchronism-check, synchroscope, and autosynchronism functions.
Schweitzer Engineering Laboratories, Inc. SEL-700G Data Sheet
3
➤ Wind Generator Protection Features (SEL-700GW). The SEL-700GW is configured with two sets of phase,
negative-sequence, and residual-ground overcurrent elements, and phase, negative-sequence, and residual-ground
time-overcurrent elements to provide dual-feeder protection in a multiple wind generator network application. The relay
also includes three-pole breaker failure protection for two breakers.
➤ Generator Monitoring. Monitor ambient and generator winding temperature using optional analog inputs or
RTDs and protect the generator from thermal damage. Use off-frequency time accumulators and protect steam
turbine blades from fatigue failures because of off-frequency vibration.
➤ Optional Low-Energy Analog (LEA) Voltage Sensor Inputs and Rogowski Coil/LPCT Currents Inputs. The
LEA input range for voltages is as high as 8 Vac rms. Based on the nominal feeder current, the relay automatically
sets the gain for the LEA current channel inputs, which allows for a wide range of primary currents.
➤ Operator Controls. Eight programmable front-panel pushbuttons each with two programmable tricolor LEDs
allow for a wide variety of uses, including easy trip and close control and status indications for a breaker.
Implement local and remote operator control schemes using 32 local and 32 remote control bits.
➤ Integrated Web Server. View settings and metering and monitoring data, download event reports, and upgrade
relay firmware with an intuitive password-protected web server.
➤ Relay and Logic Settings Software. ACSELERATOR QuickSet® SEL-5030 Software reduces engineering costs
for relay settings and logic programming. The tools in QuickSet make it easy to develop SELOGIC® control
equations. Use the built-in phasor display to verify proper CT polarity and phasing. Use the synchroscope to watch
the autosynchronism controls.
➤ Metering and Reporting. Built-in metering functions eliminate separately mounted metering devices. Analyze
Sequential Events Recorder (SER) reports and oscillographic event reports for rapid commissioning, testing, and
post-fault diagnostics. Unsolicited SER protocol allows station-wide collection of binary SER messages.
➤ Front-Panel HMI. Navigate the relay HMI using a 2 x 16-character LCD or optional 5-inch, color, 800 x 480-
pixel touchscreen display.
➤ Additional Standard Features. Includes Modbus® RTU, Event Messenger support, MIRRORED BITS®
communications, built-in web server and communications, load profile report, 128 remote analogs, support for
12 external RTDs (SEL-2600 module), IRIG-B input, advanced SELOGIC, configurable labels,
IEEE C37.118-2005 compliant synchrophasor protocol, and fiber-optic serial port.
➤ Optional Communications Protocols. Optional communications protocols include IEC 61850 Edition 2, Modbus
TCP/IP, Simple Network Time Protocol (SNTP), IEEE 1588-2008 firmware-based PTP, EtherNet/IP, DNP3 LAN/
WAN, DNP3 serial, IEC 60870-5-103, RSTP, and PRP. With an Ethernet equipped relay, use the integrated web
server to view settings and metering and monitoring data, download reports, and upgrade firmware.
➤ Optional Communications Ports. Elective communications ports include EIA-232 or EIA-485 multimode fiberoptic serial port and single or dual, copper or fiber-optic Ethernet ports.
➤ Optional I/O Cards. Digital and analog I/O options include 4 AI/4 AO, 4 DI/4 DO, 8 DI, 8 DO, 8 AI, 3 DI/4 DO/
1 AO, 4 DI/3 DO, and 14 DI. An optional 10 internal RTD card is also available for the SEL-700G. Conformal
coating for chemically harsh and/or high moisture environments is also available as an option.
➤ Language Support. Choose English or Spanish for your serial ports, including the front-panel serial port. The
standard relay front-panel overlay is in English; a Spanish overlay is available as an ordering option.