3
Merging unit variants
3.1
Application configurations
SMU615 is fully configured to perform its designed primary function in the system
as a merging unit and it includes only the relevant functions needed for maximum
simplicity.
SMU615 is available in two alternative application configurations that can be
selected depending on the amount of additional physical interfaces required. Both
the application configurations can be selected either with conventional CT/VT
inputs or with sensor inputs.
The merging unit is delivered from the factory with a default configuration including
its internal connections. System level connections for the sampled measured values
(SMV) and GOOSE signals are required between the devices.
Table 6: Application configurations
Description
Appl.conf.
Merging unit with analog inputs
A
Merging unit with analog inputs, binary I/O and remote control
B
3.1.1
Supported functions in SMU615
Table 7: Supported functions
Function
IEC 61850
A
B
Measurement
Disturbance recorder
RDRE
1
1
Three-phase current measurement
CMMXU
1
1
Sequence current measurement
CSMSQI
1
1
Residual current measurement
RESCMMXU
1
1
Three-phase voltage measurement
VMMXU
1
1
Sequence voltage measurement
VSMSQI
1
1
Three-phase power and energy measure-
ment
PEMMXU
1
1
Frequency measurement
FMMXU
1
1
Table continues on the next page
Merging unit variants
1MRS758580 C
30
SMU615
Application Manual
Содержание Relion SMU615
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