SEL SEL-2664S Stator Ground Protection Relay

SEL-2664S   Stator Ground Protection Relay

100 Percent Stator Ground Protection,

100 Percent of the Time

• Provide 100 percent stator ground protection with a combination

of signal injection and neutral overvoltage elements.

• Eliminate frequency blind spots during generator startup by using

the unique multisine injection.

• Reduce cost by using the SEL-2664S Stator Ground Protection

Relay as a standalone protection device or with SEL or third-party

generator protection.

• Simplify commissioning with the SEL-4664 Calibration Module.

Key Features

Secure and Reliable 100 Percent Stator Winding Ground Protection

Protect generators from stator ground faults at standstill, during startup,

and while running with the multisine frequency injection and neutral

overvoltage-based protection in the SEL-2664S. This solution is intended

for use with high-resistance grounded generator applications.

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-resistance

grounded, synchronous-machine applications.

Rotor Field Ground Protection

Detect field ground faults by connecting the SEL-2664S to the SEL-2664

Field Ground Module to measure field insulation-to-ground resistance using

a switched dc voltage injection method.

Elimination of Protection Blind Spots

Inject up to four individual frequencies using the unique multisine frequency

injection to ensure that the protection does not have a blind spot during

generator startup.

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 conformally coated to provide an additional barrier to airborne

contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.

Flexible Communications

Easily integrate the SEL-2664S into your system with multiple

communications protocols, including Modbus, DNP3. Telnet, IEC 61850. and

FTP. You can implement communications-assisted tripping schemes with

standard protocols, including Mirrored Bits® communications and IEC 61850

GOOSE. The SEL-2664S offers one fiber serial  port, two fiber Ethernet

ports, and two EIA-232 serial ports.

Simplified Calibration

The SEL-2664S automated field calibration procedure uses the SEL-4664

Calibration Module, streamlining the setup and commissioning process

SEL-2664S Specifications

General

Injection Source

(I_SRC)

Source rating: 50 VA continuous

Nominal injected current amplitude: 0.5–5.0 A rms

Continuous thermal rating: 5 A rms

Amplifier clipping level: >±74 V peak

Four-Frequency Multisine Injection

For 60 Hz nominal: 18. 24. 36. and 48 Hz

For 50 Hz nominal: 15. 20. 30. and 40 Hz

Maximum open-terminal voltage: 80 V peak

Protection: Self-protecting

Neutral Voltage

Inputs

Rated operating voltage (Ue

): 2.5–240 Vac

Rated insulation voltage (Ui

): 300 Vac

Maximum continuous overvoltage rating: 275 Vac

Core-Balanced

Current

Transformer

(CBCT) Current

Input

Nominal input current: 5 mA ac rms

Continuous thermal rating: 1 A

Measurement Clipping Level

100 mA peak (when CTN_LOC = SEC)

12 mA peak (when CTN_LOC = PRIM)

One-second thermal rating: 10 A

Burden rating: 4 Ω

Rated insulation voltage (Ui

): 300 Vac

Output Contacts

This relay supports Form A and C outputs.

DC Output Ratings

Operational voltage: 24–250 Vdc

Continuous carry: 6 A @ 70°C, 4 A @ 85°C

AC Output Ratings

Communications

Protocols

Maximum operational voltage: 240 Vac

Rated operational current (Ie): 3 A @ 120 Vac, 1.5 A @ 240 Vac

SEL, Modbus, DNP3. FTP, TCP/IP, Telnet, Simple Network Time Protocol (SNTP), IEC 61850.

and Mirrored Bits communications–40° to + 85°C (–40° to + 185°F)

Operating

Temperature

Mounting Options

Available with wall-, panel-, and rack-mount options

Certifications

To view certifications for the SEL-2664S, please visit: selinc.com/company/certification