Class 1 data message priorities - Arc protection - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Interconnection protection - Power management/Load shedding - IEC 60870-5-103 Communication Manual - 620 series Relion Protection and Control - 2.0 FP1 IEC - IEC - 22.05.2023

620 series IEC 60870-5-103 Communication Protocol Manual
  1. User command responses (highest priority)
  2. Class 1 change events
  3. Disturbance file transfer messages
  4. General interrogation data responses (lowest priority)
Disturbance file transfer increases the overall response time for Class 1 change events on the IEC 60870-5-103 interface. The standard does not suggest any particular priority division between these two message types. It is therefore possible to configure the priority division between the Class 1 change events and disturbance file transfer messages. There are three possible priority levels:
  • Ev High: Class 1 change events has higher priority.
  • Ev/DR Equal: Priority is equal between the two message types.
  • DR High: Disturbance file transfer has higher priority.
The setting parameter for the priority level is located via Configuration > Communication > IEC 60870-5-103 > I3C0n > Class1Priority. Default level is Ev High.