ABB Relion 620 Series - Function Block; Functionality; Operation Principle

5.8.2 Function block
Figure 456: Function block
5.8.3 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.
5.8.4 Operation principle
The function can be enabled or disabled with the Operation setting. The
corresponding parameter values are “On" and "Off".
The operation of UPCALH can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
Signal power
supply check
CB_OPEN_CMD
CB_POSOPEN
CB_POSCLOSE
SI_PWR_ON
OPERATE
Protection
activation
check
Operate logic
Figure 457: Functional module diagram
Signal power supply check
This module is used for signal power supply supervision. The activation of the
SI_PWR_ON input enables the Operate logic module after the value of the CB power
on delay time
setting has elapsed.
1MRS757644 H
Protection related functions
620 series
Technical Manual
863