SEL-2664S 100% Stator Ground Protection

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.