SEL-551 Overcurrent/Reclosing Relay - Schweitzer Engineering …
The SEL-551 provides phase, negative-sequence, residual ground, and neutral overcurrent protection in a compact package, including a complete set of instantaneous, definite-time, and time-overcurrent elements.
Simplify the settings procedure with rules-based architecture to automatically check interrelated settings. The software highlights out-of-range or conflicting settings for correction. Transfer settings files using a PC communications link with the SEL-551 Overcurrent/Reclosing Relay.
Aug 12, 2015 · SEL-551C Relay The SEL-551C includes all of the features of the SEL-551, plus the following: • Optional front EIA-232 serial communications port • Digital I/O mix with six inputs and three outputs • Eight programmable latch control switches • Programmable alarm contact Overcurrent Elements •50 Numerous instantaneous-overcurrent elements
Use the SEL-551 Relay in Line Recloser Installations: • Overcurrent Protection - “fast” and “slow” curve operation; allowance for cold load pickup • Reclosing - up to four shots of reclosing available with sequence coordination
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SEL-551
Aug 12, 2015 · All SEL-551 relays ordered with an EIA-485 port are shipped with a C675 Terminal Adapter to adapt from the on board DB-9 connector to an 8-pin screw terminal. The SEL-551 comes standard with a CD manual. One complimentary printed instruction manual is available upon request with.
20080104 SEL-551 Relay Overcurrent Relay Reclosing Relay Instruction Manual *PM551-01-NB* Courtesy of store.ips.us
SEL-551C Overcurrent/Reclosing Relay - Schweitzer Engineering …
The SEL-551C Overcurrent/Reclosing Relay combines overcurrent protection, built-in I/O, enhanced communications features, and multiple-shot reclosing in one compact relay. Great for industrial, commercial, and utility, primary or secondary overcurrent protection.
SEL 551 INSTRUCTION MANUAL Pdf Download | ManualsLib
View and Download Sel 551 instruction manual online. Overcurrent Relay Reclosing Relay. 551 relays pdf manual download.
Schweitzer Engineering Laboratories, Inc. SEL-551/SEL-551C Data Sheet 5 Programmable Auto-Reclosing The SEL-551/SEL-551C can auto-reclose a circuit breaker up to four times before lockout. Use SELOGIC control equations to perform a number of these reclosing functions: Initiate reclosing for a particular trip operation.
Over-current protection relay SEL-551 - DirectIndustry
Overcurrent/Reclosing Relay The SEL-551 Overcurrent/Reclosing Relay replaces the many relays, control switches, and wiring required in traditional distribution substation protection and control panels. The relay also replaces line recloser control packages at a fraction of the cost.
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