Step position - Arc protection - Bay control and measurement - Motor protection - Transformer protection - 2 winding - Busbar differential protection (low impedance) - Feeder protection - Voltage regulation - Busbar protection (voltage and frequency) - Capacitor bank protection - Interconnection protection - Power management/Load shedding - Back-up protection - IEC 60870-5-101/104 Communication Manual - SSC600 Smart substation control and protection - 1.5 - IEC - ANSI - 16.02.2023

SSC600 and SSC600 SW IEC 60870-5-104 Communication Protocol Manual

Tap changer step position information (-64…63) is derived from the IEC 61850 class BCS (binary controlled step position).

  • BCS.ValWTr.stVal
Table 1. Step position

Type

ASDU

GI

5

M_ST_NA_1

Step position

Event

32

M_ST_TB_1

Step position with CP56Time2a