76
1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
5.1.13.10.
System structure
The system very often resembles the system in the figure below. The protection,
control or alarm functions are implemented by using RET 54_ transformer
terminals, SPACOM units or other SPA bus devices (devices connected to the
system via the SPA bus). Generator or motor transformers are protected and
controlled with RET 54_ transformer terminals. LON devices made by other
manufacturers or other ABB companies may be used for various DI, AI and DO
functions. MicroSCADA is used for remote control.
Fig. 5.1.13.10.-1Example of a LON-based substation automation system
In the system described in the figure above, communication is usually arranged as
shown in the table below.
Table 5.1.13.10-1Communication arrangement example
Data type
RET <-> MicroSCADA
RET and LSG
devices to each other
Control commands
transparent SPA bus messages
-
Events and alarms
sliding window protocol
-
State of breakers and isolators sliding window protocol
network variables
Analog measurement values
sliding window protocol
-
Other DI, AI data
sliding window protocol
network variables
Other DO, AO data
transparent SPA bus messages
network variables
Parameter data
transparent SPA bus messages
-
SPA file transfer data
transparent SPA bus messages
-
C
E
F
I
0
C
E
F
I
0
O
I
SPAC 331 C
O
I
SPAC 331 C
lons
y
s_b
SP
A
bus
modules
connected
over
LON/SP
A
-gate
w
a
y
s
RE_
54_
or
RET
54_
terminals
connected
via
RER
103
f
ibre-optic
adapters
RER
111
LON
star-coupler
SP
A
bus
SP
A
bus
Fibre-optic
LON
net
w
ork
M
icroSC
ADA
PCLT
A
card
and
RER
107
inside
PC
RER
111
LON
SFIBER
connection
cards
Содержание RET 54 Series
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