ABB RELION 620 Series Technical Manual page 33

620 series ANSI
Technical Manual
Measurement modes............................................................................ 875
Calculated measurements.................................................................... 877
Section 13 Requirements for measurement transformers...................879
Current transformers.............................................................................879
Current transformer requirements for non-directional overcurrent
protection.........................................................................................879
Current transformer accuracy class and accuracy limit factor....879
Non-directional overcurrent protection....................................... 880
Example for non-directional overcurrent protection....................882
Current transformer requirements for differential protections.......... 882
Section 14 Protection relay's physical connections.............................889
Connections to the rear panel terminals............................................... 889
Protective ground connections............................................................. 890
Communication connections.................................................................890
Ethernet RJ-45 front connection......................................................891
Ethernet rear connections............................................................... 892
EIA-232 serial rear connection........................................................ 892
EIA-485 serial rear connection........................................................ 892
Optical ST serial rear connection.................................................... 893
Communication interfaces and protocols........................................ 893
Rear communication modules......................................................... 894
COM0001-COM0014 jumper locations and connections .......... 897
COM0023 jumper locations and connections.............................899
COM0033-COM0034 jumper locations and connections........... 904
Section 15 Technical data................................................................... 907
Section 16 Protection relay and functionality tests..............................915
Section 17 Applicable standards and regulations............................... 919
Section 18 Glossary............................................................................ 921
Table of contents
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