Figure. 5.2.1 - 16. Setting group control – two-wire connection from Petersen coil status with additional logic.
The images above depict a two-wire connection from the Petersen coil: the two images at the top
show a direct connection, while the two images on the bottom include additional logic. With a two-wire
connection the state of the Petersen coil can be monitored more securely. The additional logic ensures
that a single wire loss will not affect the correct setting group selection.
The application-controlled setting group change can also be applied entirely from the relay's internal
logics. For example, the setting group change can be based on the cold load pick-up function (see the
image below).
A
AQ
Q-S254
-S254
Instruction manual
Version: 2.06
34
© Arcteq Relays Ltd
IM00024
Summary of Contents for AQ-S254
Page 1: ...AQ S254 Alarm and Indication IED Instruction manual...
Page 2: ......
