Sel-300g Spec Eng 2b4n4a

GENERATOR AND MOTOR PROTECTION

SEL-300G Generator Relay

Apply the SEL-300G for comprehensive primary and backup generator protection.

Key Features

SEL-300G Relay With SEL-2664 Module

Comprehensive Generator Protection Numerous current, voltage, frequency, distance, and out-of-step elements provide comprehensive protection for large and small machines. One Hundred Percent Stator Ground Fault Protection One hundred percent stator ground fault protection using both fundamental frequency overvoltage and third-harmonic voltage differential elements to protect high-impedance grounded generators. Current Differential Protection Optional current differential elements to optimize protection for larger machines, yet economical enough for smaller machines. Phase shift and magnitude difference compensation for current differential applications that include generator step-up transformers. Current differential option includes individual phase overcurrent elements for split-phase differential protection applications. Overexcitation Detection Volts-per-hertz elements detect overexcitation in both the generator and step-up transformer. Choose from multiple curves and definite-time elements for alarm and tripping applications. Directional Power Elements Sensitive directional power elements protect against reverse power, overload conditions, or low forward power.

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ENV

HMI

DFR

SER

MET

BRM

SBM

85 RIO

LGC

RTD-Based Protection Use an SEL-2600 RTD Module to acquire thermal data for alarm and trip functions in the SEL-300G. Metering and Reporting Event reporting, Sequential Events Recorder (SER), Fast SER messages, and high-accuracy metering eliminate or reduce external metering requirements. Use 180-cycle oscillographic event reports to analyze unit shutdown or system faults. ACSELERATOR QuickSet® SEL-5030 Software simplifies event collection, real-time analog display, and relay settings. Field Ground Protection Use the SEL-2664 Field Ground Module to provide field ground protection using dc voltage injection.

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Related Products SEL Fiber-Optic Transceivers ........................................................................ 488—497 SEL-700G Generator Protection Relay .................................................................. 270 SEL-2600 RTD Module ................................................................................................298 SEL-2664 Field Ground Module ............................................................................... 282 SEL-9220 Fiber-Optic Adapter for SEL-300 Series Relays ...............................498

Tel: +1.509.332.1890 | Fax: +1.509.332.7990 | www.selinc.com

GENERATOR AND MOTOR PROTECTION

SEL-300G Generator Relay Applications

Hardware Specifications

• Connect the SEL-300G (with optional current differential elements) across large generators for complete primary and backup protection. Adding the neutral voltage connection provides 100 percent stator ground protection for most machines, based on third-harmonic voltage measurements. Connecting the neutral current input provides protection for solidly grounded or resistance-grounded machines. • Apply sensitive percentage-restrained current differential elements and an unrestrained element, along with synchronism check and volts-per-hertz elements, across the entire unit to protect both the generator and the step-up transformer. • Replace auxiliary meters at the generating station by taking advantage of accurate internal metering. • Use the six-step frequency elements to trip for under- and overfrequency operation, while accumulating off-nominal frequency time in each 0.1 Hz band between 20 and 70 Hz. (Note: See IEEE guidelines for use of off-nominal frequency data to track accumulated mechanical stress in turbines.) • Monitor and record generator utilization with internal hour meters that record stopped time, run time, and full load hours. • Record accumulated breaker wear with the breaker monitor function, which uses manufacturer’s specifications for defining breaker operation limits. The internal monitor tracks the total number of close/open operations and integrates interrupted current per phase. Set an alarm to alert operators when measured and accumulated quantities approach maintenance thresholds. This information facilitates proactive breaker maintenance and replacement without underutilizing resources. • Monitor field ground resistance with state-of-the-art voltage injection. Protect generators from damage by responding to low field resistance warnings.

Optional Features • Synchronism-checking element. • Three-phase current differential or ground differential elements. • Additional optoisolated inputs and standard or high-current interrupting output s.

AC Voltage Inputs 80—208 VL-L nominal, for 4-wire wye voltage input 80—140 VL-L nominal, for 3-wire delta voltage input 300 VL-N continuous limit for 3-phase, 4-wire wye connection 300 VL-L continuous limit for 3-phase, 3-wire delta connection 300 V continuous, VN-NN neutral voltage input 300 V continuous, VS-NS synch voltage input 365 Vac for 10 seconds Burden 0.13 VA @ 67 V; 0.45 VA @ 120 V; 0.80 VA @ 300 V AC Current Inputs 5 A nominal 15 A @ 85°C, 20 A @ 55°C continuous, 500 A for 1 second, linear to 100 A symmetrical, 1250 A for 1 cycle Burden 0.27 VA @ 5 A; 2.51 VA @ 15 A 1 A nominal 3 A @ 85°C, 4 A @ 55°C continuous, 100 A for 1 second, linear to 20 A symmetrical, 250 A for 1 cycle Burden 0.13 VA @ 1 A; 1.31 VA @ 3 A Power Supply Ratings 125/250 V 85—350 Vdc or 85—264 Vac 48/125 V 38—200 Vdc or 85—140 Vac 24/48 V 20—60 Vdc <25 W total burden Standard Control Input and Output Ranges 24, 48, 125, or 250 Vdc Standard configuration provides 6 inputs and 8 outputs, <5 ms pickup/ dropout times with 30 A make, 6 A continuous duty. Additional interface I/O board may be selected with standard inputs and high-current interrupting outputs. Operating Temperature —40° to +85°C (—40° to +185°F) (Note: LCD contrast impaired for temperatures below —20°C.)

Price Budgetary Retail, Quantity 1: $3,100

• Rack-mount or -mount hardware.

(Base price is shown for planning purposes and is subject to change. your SEL sales representative today for a quote on configurations and quantities to meet your needs.)

• Connectorized® (plug-in connectors). • Modbus® RTU protocol. • Compatible with the SEL-2600 RTD Module.

This SEL product is GSA approved. your sales representative for pricing and delivery options.

• Field ground protection with the SEL-2664 Field Ground Module. • Conformal coating.

Installation of SEL-300G Generator Relays protecting two 30 MVA generators at the Lake Chelan hydro facility. Photograph courtesy of Chelan County PUD. Tel: +1.509.332.1890 | Fax: +1.509.332.7990 | www.selinc.com

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GENERATOR AND MOTOR PROTECTION

SEL-300G Generator Relay Front View – -Mount

Rear View – Conventional Terminal Blocks (2U)

Rear View – Conventional Terminal Blocks – Additional I/O (3U)

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Tel: +1.509.332.1890 | Fax: +1.509.332.7990 | www.selinc.com

GENERATOR AND MOTOR PROTECTION

SEL-300G Generator Relay Rear View – Connectorized – Additional I/O (3U)

Dimensions

Visit www.selinc.com for more detailed information and configuration options. Tel: +1.509.332.1890 | Fax: +1.509.332.7990 | www.selinc.com

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