ABB RELION Series, Technical Manual

Page: 676 / 804

In progress logic
Automatic operation ongoing is signalled outside to output
INPRO
. The
INPRO
output is set TRUE if an undervoltage is detected on the active bus or if an auto
reconnection is initialized.
INPRO
is reset when an auto transfer or an auto
reconnection is completed or if the fault is cleared during the waiting time.
Auto blocking alarm logic
Blocking alarm for auto switching is signalled outside to output
BLKD_AL
. Blocking
alarm is TRUE for various reasons.
•
BLOCK
input is active
• CB1 is closed and under-voltage detected on bus 2
• CB2 is closed and under-voltage detected on bus 1
• Undervoltage detected on both bus 1 and bus 2
GUID-A9BA0F4D-6C46-4C5B-944A-63759094316A V1 EN
Figure 353: Sub module diagram for auto blocking alarm logic
9.5.5 Application
GUID-41CBF4F0-9D49-4605-AB4E-8D9188C34F6B V1 EN
Figure 354: Application configuration example
A recommended application configuration example is described in Figure 9.5.4 .
Undervoltage detection on bus 1 and undervoltage detection on bus 2 are connected
directly to the
UN_U_BUS1
and
UN_U_BUS2
. The undervoltage indication at each
bus can be detected from for example functions PHPTUV, VMMXU or PHSVPR.
Section 9
1MRS758755 A
Control functions
670 REC615 and RER615
Technical Manual