615 series
Technical Manual
Frequency measurement and protection........................................838
Measurement modes......................................................................839
Current transformers......................................................................843
Current transformer requirements for non-directional
overcurrent protection................................................................843
Current transformer accuracy class and accuracy limit
factor....................................................................................843
Protective earth connections..........................................................847
Binary and analog connections......................................................847
Ethernet RJ-45 front connection................................................848
EIA-232 serial rear connection..................................................849
EIA-485 serial rear connection..................................................849
Optical ST serial rear connection..............................................850
Communication interfaces and protocols..................................850
COM0008 and COM0010 jumper locations and
connections..........................................................................863
Table of contents
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