ABB RELION 620 Series Technical Manual page 869

1MRS757644 F
5.8
5.8.1
5.8.2
5.8.3
5.8.4
620 series
Technical Manual
Circuit breaker uncorresponding position start-up
UPCALH
Identification
Function description
Circuit breaker uncorresponding
position start-up
Function block
GUID-95E27040-82AE-46F0-B5AA-D46896F677EA V1 EN
Figure 446: Function block
Functionality
The circuit breaker uncorresponding position start-up function UPCALH detects
circuit breaker openings in an unknown situation. An unexpected breaker opening can
be caused by, for example, internal mechanical malfunction.
UPCALH can be used independently. The function output is activated when detecting
a circuit breaker opening in an unknown situation.
In most cases, the function module is used together with the AR function module. The
operate output signal can be one of the start-up signals of the AR function.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of UPCALH can be described using a module diagram. All the modules
in the diagram are explained in the next sections.
Protection related functions
IEC 61850 IEC 60617
identification identification
UPCALH CBUPS
Section 5
ANSI/IEEE C37.2
device number
CBUPS
863