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Bus differential and breaker failure relay
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SEL-487B-2 Bus Differential and
Breaker Failure Relay
Bus Differential and Breaker Failure Relay
With Sampled Values or TiDL Technology
Key Features and Benefits
The SEL-487B-2 Bus Differential and Breaker Failure Relay with Sampled Values (SV) or TiDL
bus-current differential protection, circuit-breaker failure protection, and backup overcurrent protection.
➤
High-Speed Differential Protection. Busbar differential protection operates in less than one cycle, which
increases system stability margins and reduces equipment damage.
➤
Six Differential Zones. Flexible zone selection and six differential zones provide protection for multiple busbar
applications.
➤
Failed CT Detection. The SEL-487B reliably indicates open and shorted CTs for alarming and/or blocking.
➤
CT Ratio Mismatch. Differential protection accommodates as high as 10:1 CT ratio mismatch without auxiliary CTs.
➤
External Fault Security. External fault detection logic secures differential protection for external faults with
minimal CT requirements.
➤
Overcurrent Elements. Instantaneous and inverse time-overcurrent elements can provide backup protection for
each terminal.
➤
Voltage Elements. Negative- and zero-sequence, over- and undervoltage elements can supervise the differential element.
➤
Three Check Zones. Three dedicated check zones in each relay can supervise complex bus differential schemes.
➤
Breaker Failure. Apply the relay to supply breaker failure protection for all supported breakers. Logic for breaker
failure retrip and initiation of transfer tripping is included.
➤
Ethernet Access. The Ethernet card grants access to all relay functions. Use IEC 61850 Manufacturing Message
Specification (MMS) or DNP3 protocol directly to interconnect with automation systems. You can also connect to
DNP3 networks through a communications processor. Use File Transfer Protocol (FTP) for high-speed data collection.
➤
Serial Data Communication. The relay can communicate serial data through SEL ASCII, SEL Fast Message,
SEL Fast Operate, M
Schweitzer Engineering Laboratories, Inc.
®
B
, and DNP3 protocols.
IRRORED
ITS
®
Technology provides
SEL-487B-2 Data Sheet
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Summary of Contents for Schweitzer Engineering Laboratories SEL-487B-2
- Page 1 Bus Differential and Breaker Failure Relay With Sampled Values or TiDL Technology Key Features and Benefits ® The SEL-487B-2 Bus Differential and Breaker Failure Relay with Sampled Values (SV) or TiDL Technology provides bus-current differential protection, circuit-breaker failure protection, and backup overcurrent protection. ➤...
- Page 2 Rules-Based Settings Editor. You can communicate with and set the relay by using an ASCII terminal or use Grid Configurator to configure the relay and analyze fault records with relay element response. Use as many as 200 aliases to rename any digital or analog quantity in the relay. SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 3 Figure 1 SEL-487B Functional Overview TiDL The SEL-487B subscribes to data streams that are published The SEL-487B-2 TiDL receives and automatically syn- by merging units, such as the SEL-421-7 SV Publisher or chronizes data streams from connected and commissioned SEL-401 Protection, Automation, and Control Merging SEL-TMUs.
- Page 4 ZONE command, showing Current Input I18 the terminals and bus zones assigned to each protection zone. External Fault Fault Internal Detection Logic Fault Figure 5 External Fault Detection Logic Increases Differential Element Security SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 5 Assigns the currents to the differential element of the appropriate zone. Current assignment conditions vary from simple to com- plex. A simple condition would be a statement such as “always include this terminal in the differential calcula- Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 6 Table 2 shows the four possible disconnect auxiliary con- rent from the differential element calculations. This tact combinations and how the relay interprets each com- capability ensures stability of the busbar protection. By bination. SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 7 F1. The SEL-487B includes tie-breaker logic to prevent the loss of both zones for this fault. Figure 15 A Single CT With Two CT Cores Configured in Overlap Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 8 DC connections for breaker status and control w No physical connection. SV Subscriber #2 GOOSE Publications Published data do not contain 1. TRIP01–TRIP18 valid analog measurements Figure 17 Double-Breaker Double-Bus Application (SV) SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 9 Use the capabilities of the SEL-487B front panel to integrate a wide range of con- trol and system annunciation functions. Figure 20 Front-Panel Display and Pushbuttons Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 10 Four-port Ethernet card ordering option only. separately. See selinc.com/products/sfp for a list of compatible SFP Gigabit speeds are only available on PORT 5A and PORT 5B of the five- transceivers. port Ethernet card ordering option. SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 11 Use PRP to provide seamless recovery from any single for assignment as remote analog outputs. Remote Ethernet network failure, in accordance with IEC 62439-3. The Ethernet network and all traffic are fully duplicated with both copies operating in parallel. Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 12 The relay does not require special communications software. ASCII terminals, printing terminals, or a computer sup- plied with terminal emulation and a serial communications port are all that is required. Table 3 lists a brief description of the terminal protocols. SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 13 64 latching control points. functions allow superior flexibility. Program latch set and latch reset conditions with SEL OGIC OGIC control equations. Set or reset the latch control points via Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 14 V01, V02, V03 Fundamental phase voltage magnitude and and protective schemes. angle in primary and secondary values I01, I02, . . ., I21 Fundamental phase current magnitude and angle in primary and secondary values SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 15 With an appropriate setting, the relay sends an event voltage drops during trip, close, and other control operations. summary in ASCII text automatically to one or more serial ports each time an event report is triggered. Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 16 IN13 IN14 IN15 MONITOR POWER Vdc 1 – – i7289a Five-port Ethernet card ordering option depicted. Figure 25 SEL-487B-2 SV Subscriber Rear Panel EIA-232 PORT 5A PORT 5B PORT 5C PORT 5D PORT 5E PORT 3 PORT 2 ACT LNK...
- Page 17 Power supply ➢ ➢ Horizontal rack mount 24–48 Vdc ➢ ➢ Horizontal panel mount 48–125 Vdc or 110–120 Vac ➢ ➢ Vertical rack mount 125–250 Vdc or 110–240 Vac ➢ Vertical panel mount Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 18 All ports support 100 Mbps speeds. PORT 5A and PORT 5B also sup- port 1 Gbps speeds. Specifications 48—125 Vdc or 110—120 Vac Note: Because the SEL-487B-2 uses DSS, the relay operating times are delayed. For SV applications, operating times are delayed by the configured Rated Voltage: 48–125 Vdc, 110–120 Vac channel delay, CH_DLY.
- Page 19 Min. RX Sens. (dBm): –31 DC Thresholds (Dropout thresholds indicate level-sensitive option) Max. RX Sens. (dBm): –12 24 Vdc: Pickup 19.2–30.0 Vdc; Approximate Range: 2 km Dropout <14.4 Vdc Transceiver Internal Temperature Accuracy: ±3.0°C Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 20 Rated I/O Voltage: 5 Vdc Source: Operational Voltage Range: 0–8 Vdc 2.2 Vdc Connector Type: Logic High Threshold: 0.8 Vdc Logic Low Threshold: 50 or >1 k Input Impedance: Dielectric Test Voltage: 0.5 kVac SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 21 Note: 50G1P 0.05 (ESS = N, 1, 2) 50G1P 0.1 (ESS = 3, 4) ±5.0 kV: Standard Contact Outputs, Power Supply Battery Monitors +5.0 kV: Hybrid Contact Outputs Insulation Resistance: IEC 60255-27:2013, Section 10.6.4.4 >100 M @ 500 Vdc Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 22 Timer Setting Range: 0.00–99999.00 cycles, 1/6-cycle steps Storage: 100 summaries Timer Accuracy: ±0.1% of settings ±1/6 cycle Sequential Events Recorder Maximum Operating Time: 1.5 cycles Storage: 1000 entries Trigger Elements: 250 relay elements SEL-487B-2 Data Sheet Schweitzer Engineering Laboratories, Inc.
- Page 23 Timer Setting Range: 0–99999 cycles, 1 cycle step Breaker Status Number: Coupler Security Logic Number: Timer Setting Range: 0–1000 cycles, 1/12 cycle step Control Input Timers Setting Range Pickup: 0.00–30 ms Dropout: 0.00–30 ms Schweitzer Engineering Laboratories, Inc. SEL-487B-2 Data Sheet...
- Page 24 SEL products appearing in this document may be covered by U.S. and Foreign selinc.com • info@selinc.com patents. Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in its products, including without lim- itation software, firmware, and documentation.
