ABB REF615 G - Operation Principle

The function contains a blocking functionality. It is possible to block function
outputs and timers if desired.
9.3.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The SECRSYN function has two parallel functionalities, the synchrocheck and
energizing check functionality. The operation of the synchronism and energizing
check function can be described using a module diagram. All the modules in the
diagram are explained in the next sections.
Energizing
check
Synchro
check
GUID-FE07029C-C6C1-4BA7-9F8E-CACE86D0A9BD V2 EN
Figure 363: Functional module diagram
The Synchro check function can operate either with the U_AB or U_A voltages.
The selection of used voltages is defined with the VT connection setting of the line
voltage general parameters.
Energizing check
The Energizing check function checks the energizing direction. Energizing is
defined as a situation where a dead network part is connected to an energized
section of the network. The conditions of the network sections to be controlled by
the circuit breaker, that is, which side has to be live and which side dead, are
determined by the setting. A situation where both sides are dead is possible as well.
The actual value for defining the dead line or bus is given with the Dead bus value
and Dead line value settings. Similarly, the actual values of live line or bus are
defined with the Live bus value and Live line value settings.
Table 610: Live dead mode of operation under which switching can be carried out
Live dead mode
Description
Both Dead Both line and bus de-energized
Live L, Dead B Bus de-energized and line energized
Dead L, Live B Line de-energized and bus energized
Table continues on next page
Section 9 1YHT530004D05 D
Control functions
680 615 series
Technical Manual