7SA5225-5GB00-4NP4-DD Siemens

Ürün Kodu: 7SA5225-5GB00-4NP4-DD
Stok Miktarı: 1

7SA5225

SIPROTEC 4 7SA522 Distance Protection Relay for Transmission Lines

Description Siemens SIP · 2006 6 Distance Protection / 7SA522 6 6/45 Protection functions • Non-switched distance protection with 6 measuring systems (21/21N) • High resistance ground (earth)-fault protection for single- and three-pole tripping (50N/51N/67N) • Tele (pilot) protection (85) • Fault locator (FL) • Power swing detection/tripping (68/68T) • Phase-overcurrent protection (50/51/67) • STUB bus overcurrent protection (50 STUB) • Switch-onto-fault protection (50HS) • Over/undervoltage protection (59/27) • Over/underfrequency protection (81O/U) • Auto-reclosure (79) • Synchro-check (25) • Breaker failure protection (50BF) Control functions • Commands f. ctrl of CB and isolators Monitoring functions • Trip circuit supervision (74TC) • Self-supervision of the relay • Measured-value supervision • Event logging/fault logging • Oscillographic fault recording • Switching statistics Front design • User-friendly local operation with numeric keys • LEDs for local alarm • PC front port for convenient relay setting • Function keys Communication interfaces • Front interface for connecting a PC • System interface for connecting to a control system via various protocols – IEC 61850 Ethernet – IEC 60870-5-103 protocol – PROFIBUS-FMS/-DP – DNP 3.0 • 2 serial protection data interfaces for tele (pilot) protection • Rear-side service/modem interface • Time synchronization via IRIG B or DCF77 or system interface Hardware • Binary inputs: 8/16/24 • Output relays: 16/24/32 • High-speed trip outputs: 5 (optional) SIPROTEC 4 7SA522 Distance Protection Relay for Transmission Lines The SIPROTEC 4 7SA522 relay provides full-scheme distance protection and incorporates all functions usually required for the protection of a power line. The relay is designed to provide fast and selective fault clearance on transmission and subtransmission cables and overhead lines with or without series capacitor compensation. The power system star point can be solid or resistance grounded (earthed), resonant-earthed via Peterson coil or isolated. The 7SA522 is suitable for single-pole and three-pole tripping applications with and without tele (pilot) protection schemes. The 7SA522 incorporates several protective functions usually required for transmission line protection. − High-speed tripping time − Suitable for cables and overhead lines with or without series capacitor compensation − Self-setting power swing detection for frequencies up to 7 Hz − Digital relay-to-relay communication for two and three terminal topologies − Adaptive auto-reclosure (ADT)

Application Fig. 6/49 Single-line diagram ANSI Protection function 21/21N Distance protection FL Fault locator 50N/51N Directional earth(ground)-fault protection 67N 50/51/67 Backup overcurrent protection 50 STUB STUB-bus overcurrent stage 68/68T Power swing detection/tripping 85/21 Teleprotection for distance protection 27WI Weak-infeed protection 85/67N Teleprotection for earth(ground)- fault protection 50HS Switch-onto-fault protection 50BF Breaker failure protection 59/27 Overvoltage/undervoltage protection 81O/U Over/underfrequency protection 25 Synchro-check 79 Auto-reclosure 74TC Trip circuit supervision 86 Lockout (CLOSE command interlock