ABB SPAU 140 C User Manual And Technical Description page 5

U1
U2
U3
Blocking input
BS13
Blocking input
BS23
Closing command
signal CS13
Closing command
signal CS23
Fig. 1. Supervision functions of synchro-check relay SPAU 140 C. The encircled numbers refer to
the ANSI number of the concerned function. (ANSI = American National Standards Institute)
Two identical operation
stages
Voltage-check function
Synchro-check
25
funktion
Continuous/ Command
mode operation
Serial communication
Closing signal
CB13
Closing signal
CB23
Alarm
IRF
Serial communication I/O
5