American Power Conversion SYMF800KH - Manual (Page 29)

Electrical Installation: Relay Board (Optional)
Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D 23
Communication cables with optional Relay Board
Shunt trip
24V
External Lamp
supply V or V
Max. 250V 5A
DC
DC
AC
AC