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上海圓馨能源科技有限公司
主營(yíng)產(chǎn)品： IFM開(kāi)關(guān),IFM傳感器,易福門開(kāi)關(guān),易福門傳感器,HYDAC傳感器,賀德克傳感器 |
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聯(lián)系電話
13003206617
公司信息
- 聯(lián)系人：
- 陳經(jīng)理
- 電話：
- 13003206617
- 手機(jī)：
- 13003206617
- 售后電話：
- 19901762858
- 傳真：
- 021-37653818
- 地址：
- 上海市松江區(qū)泗涇鎮(zhèn)高技路655號(hào)4棟413-415
- 郵編：
- 200001
- 個(gè)性化：
- www.aidingjx.com
- 網(wǎng)址：
- true-witness.com/st244798/
SEL-387的線路縱差保護(hù)
2016-4-21 閱讀(1197)
SEL-387L Line Current Differential Relay
Use SEL-387L Line Current Differential Relays for economical, easy-to-apply line protection.
BUDGETARY RETAIL
FEATURED APPLICATIONS
Line Current Differential Protection—Protect two-terminal transmission and subtransmission lines with the same ratio CTs on each end. Apply a 64 kbps digital communications channel for complete phase and ground fault protection with simple settings.
Simple Installation—Set the relay in minutes! Only label the relay and terminals, and provide a unique address for the transmit and receive communications. Connect single-mode optical fiber, 1300 nm and 1550 nm, for distances up to 120 km (74 mi) without a repeater. No additional transceivers are required.
Differential Communications—Apply the SEL-387L Line Current Differential Relay with a multiplexed communications system using single-mode fiber optics or the built-in IEEE C37.94 compliant connection. Connect to EIA-422 and G.703 multiplexers by using the SEL-3094 Interface Converter.
Three-Terminal and Tapped Lines—Protect three-terminal lines with two SEL-387L Relays and one SEL-311L Line Current Differential System. Coordinate the tapped load protection for sensitivity and speed by designating the SEL-311L as the leader to make all the protection decisions. No settings are made in the SEL-387L Relays.
Simple Backup Protection—Choose the SEL-387L as a simple solution for discrete backup protection. Coordinate with another local relay, such as an SEL-551 Overcurrent/Reclosing Relay, to provide breaker failure, autoreclose, overcurrent, and ground fault prot
