Table 3. Input/output overview
Appl. conf.
Order code digit
Analog channels
Binary channels
8
9-10
CT
VT
Combi
sensor
BI
BO
A
A
AA
4
3
-
-
4PO+2SO
A
A
BA
1
-
3
-
4PO+2SO
B
B
AB
4
3
-
8
4PO+2SO+3HSO
B
B
BB
1
-
3
8
4PO+2SO+3HSO
10. Remote control and trip
SMU615 integrates functionality for the control of a circuit
breaker by means of remote control commands. In addition to
circuit-breaker control, the merging unit features two control
blocks which are intended for the motor-operated control of
disconnectors or a circuit breaker truck and for their position
indications. Further, the merging unit offers one control block
which is intended for the motor-operated control of one
earthing switch control and its position indication. The control
functionality is only available in application configuration B.
Two physical binary inputs and two physical binary outputs are
needed in the merging unit for each controllable primary device
taken into use. Application configuration B is fully configured to
control one circuit breaker and to indicate the position of one
circuit breaker, disconnector and earthing switch. The
application configuration can be further modified to release
some binary outputs which have been originally configured for
other purposes.
The suitability of the merging unit’s binary outputs, which have
been selected for controlling of primary devices, should be
carefully verified, for example, by considering the make and
carry as well as the breaking capacity. In case the requirements
for the control circuit of the primary device are not met, the use
of external auxiliary relays should be considered.
SMU615 does not include protection functionality and it is not
designed to make trip decisions. After the tripping decision is
made by another protection device in the system, the opening
of the circuit breaker can be performed by using the physical
outputs of the merging unit. Application configuration B is
ready-configured for receiving the tripping commands over
GOOSE communication when the GOOSE signals are first
connected from another device. High-speed binary outputs
(HSO) can be used when the total operate time must be
decreased.
Substation Merging Unit
1MRS758420 B
SMU615
Product version: 1.0
10
ABB
