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Siemens · 10/2014
Project planning aids
3WL Air Circuit Breakers
3WL air circuit breakers/non-automatic air circuit breakers up to 6300 A (AC), IEC
Example of the mode of operation of Zone Selective Interlocking functionality in power distribution
3VL and 3WL circuit breakers used in various staggered levels
Circuit diagram for a Zone Selective Interlocking functionality with
multiple infeed and several outgoing units with 3WL circuit breakers
ZSI function: Connection using a coupling switch, use of 3WL circuit
breakers
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More information
Up-to-date information on the Internet at:
http://www.siemens.com/sentron