9.7.2 Function block
Figure 869: Function block
9.7.3 Functionality
The autosynchronizer function for network breaker ASNSCSYN can be used for
synchronized closing of a non-generator circuit breaker such as a bus sectionalizer,
a bus coupler or an incoming feeder. ASNSCSYN includes functionalities for
autosynchronization, synchrocheck and energizing check.
ASNSCSYN checks the power system conditions between both networks across the
circuit breaker. The energizing check is used to check that at least one side is dead
to ensure that closing can be done safely.
In case of a synchronous system, the closing command is issued after
considering the function modes, essential checks, CB closing time and the
paralleling conditions. In case of asynchronous systems, the function initiates the
matching of voltage and frequency with the help of available generators through
Autosynchronizer co-ordinator ASCGAPC.
The function contains a blocking functionality. It is possible to block function
outputs.
9.7.4 Analog input configuration
ASNSCSYN has two analog group inputs which must be properly configured.
Table 1527: Analog inputs
Input Description
U3P1 Three-phase voltages (Bus B side)
U3P2 Three-phase voltages (Bus A side)
See the preprocessing function blocks in this document for the possible
signal sources.
There are a few special conditions which must be noted with the configuration.
1MRS759142 F
Control functions
REX640
Technical Manual
1587
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