The SEL-2664S uses multisine signal injection to provide 100% stator ground protection 100 percent of the time. The relay works with the generator in or outof- service, including the generator ramp-up with no blind period.
Functional Overview
59N
Neutral Overvoltage
64F
Field Ground
64S
Stator Ground
DFR
Event Reports
HMI
Operator Interface
LDP
Profile Report Monitoring
LGC
SELogic Control Equations
MET
High-Accuracy Metering
NGR
NGR Open/Short
SER
Sequential Events Recorder
Front- and Rear-Panel Diagrams
Front
Rear
100 PERCENT STATOR WINDING PROTECTION, 100 PERCENT OF THE TIME
Protect high-impedance grounded generators from ground faults at standstill, during startup, and while running with the multisine frequency injection and neutral overvoltage-based protection in the SEL-2664S.
STATOR PROTECTION FOR RETROFIT AND NEW EQUIPMENT APPLICATIONS
Use the SEL-2664S as a standalone protection device or with SEL or third-party generator protection. The SEL-2664S is ideal for all high-impedance-grounded, synchronous-machine applications.
ROTOR FIELD GROUND PROTECTION
The SEL-2664S Relay, when connected to the SEL-2664 Field Ground Module, detects field ground faults by measuring field insulation-to-ground resistance by using a switched dc voltage injection method.
ELIMINATION OF PROTECTION BLIND SPOTS
Inject up to four individual frequencies to ensure that the protection does not have a blind spot during generator startup by using the unique multisine frequency injection in t h e SEL-2664S.
RUGGED DESIGN FOR EXTREME ENVIRONMENTS
Built to the same high standards as SEL protective relays, the SEL-2664S withstands vibration, electrical surges, fast transients, and extreme temperatures, meeting stringent industry standards. The printed circuit boards are confor-mally coated to provide an additional barrier to airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.
FLEXIBLE COMMUNICATIONS
Multiple communications protocols, including Modbus®, DNP3, Telnet, IEC 61850, and FTP allow for simple integra-tion. Apply communications-assisted tripping schemes with standard protocols, including Mirrored Bits® and IEC 61850 GOOSE. The SEL-2664S offers one fiber serial and two fiber Ethernet ports along with two EIA-232 serial ports.
REDUNDANT OPERATION
The SEL-2664S can operate in redundant mode for critical applications. Use two SEL-2664S Relays in parallel to provide redundant stator ground fault protection.
FLEXIBLE HARDWARE
Available with wall-, panel-, and rack-mount options, the SEL-2664S is powered by a 125/250 Vdc or 110/240 Vac power supply and has four trip-rated output contacts and two contact inputs. Eight target LEDs and a target/trip reset pushbutton provide an easy-to-use interface.