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APPENDIX B
CoreSense Hub option
Overview
The CoreSense Hub continuously monitors hydrogen and moisture levels in transformer oil in the same way
as the standard CoreSense does. However, in addition to standard CoreSense features, the CoreSense Hub
option allows monitoring of generic external sensors found on connected equipment. The CoreSense Hub
manages those external sensors the same way as the hydrogen and moisture sensors.
Monitoring is performed with generic Modbus RTU communication through an RS-485 serial interface using
4–20 mA inputs. Monitoring data is communicated through the SCADA using the standard Modbus TCP
communication protocol.
Figure 25 illustrates a CoreSense Hub in a typical installation.
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Figure 25 Typical CoreSense Hub installation
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