ABB Relion SMU615 Product Manual page 7

Substation Merging Unit
SMU615
Product version: 1.0
Protection and
Control Relay
Current Sensors
GUID-1504F322-B34D-409E-A7A9-512FB235921A V2 EN
Figure 2. SMU615 sending voltage measurements as sampled measured values to protection relays
In Figure 2 SMU615 measures the voltages in the substation
and sends them as sampled measured values over the
Ethernet. Within the substation, the protection relays with
ABB
Substation
Merging Unit
SMV
Voltage
Sensor
phase voltage based functions can receive the values and use
them instead of the physically measured voltages from VTs or
voltage sensors.
1MRS758420 B
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