Parameters to be set are MODE, common for the whole block, and CMDOUTy
which includes the user defined name for each output signal. The MODE input sets
the outputs to be one of the types Off, Steady, or Pulse.
•
Off, sets all outputs to 0, independent of the values sent from the station level,
that is, the operator station or remote-control gateway.
•
Steady, sets the outputs to a steady signal 0 or 1, depending on the values sent
from the station level.
•
Pulse, gives a pulse with 100 ms duration, if a value sent from the station level
is changed from 0 to 1. That means the configured logic connected to the
command function block may not have a cycle time longer than the cycle time
for the command function block.
12.12
Transformer energizing control XENCPOW
GUID-0AC48962-6A23-4ED7-8263-7B449BED54E2 v1
12.12.1
Identification
GUID-E3009E9F-7AE2-472F-A7E6-F2245626CFA3 v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Transformer Energizing Control
XENCPOW
0->1T
IEC15000180 V1 EN-US
25T
12.12.2
Application
GUID-11110C3C-33A3-4B36-9D85-F112334B29D1 v2
The transformer core may become saturated due to an abrupt change in the voltage
applied to it. This may be caused by:
•
Switching transients
•
Out-of-phase synchronization of a generator
•
Clearing of an external fault
When saturated, a transformer absorbs a magnetization current, also known as
inrush current, which can reach several times the nominal current of the
transformer. Energization of a transformer from the network by uncontrolled/
random closing by a switching device produces inrush currents since the flux in the
core can reach a maximum theoretical value of 2 to 3 times the rated peak flux.
This can have undesirable consequences.
The flux-linkage/current relation is non-linear, as shown in Figure
, and it is
determined by the saturation curve of a transformer. Therefore, the magnetization
current of the transformer contains harmonics.
Section 12
1MRK 506 375-UEN A
Control
340
Railway application RER670 2.2 IEC
Application manual
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