Functional Diagram For Disturbance Recorder And Trip Circuit Supervision - ABB REF615 Applications Manual

Section 3
REF615 variants
3.8.3.2
102
GUID-A77D0608-E3F2-4D3D-8907-15034FC42D51 V1 EN
Figure 55: Positive-sequence undervoltage and negative-sequence
overvoltage protection
The residual overvoltage protection (ROVPTOV) provides earth fault protection by
detecting abnormal level of residual voltage. It can be used, for example, as a non-
selective backup protection for the selective directional earth-fault functionality. The
operation signal is connected to alarm LED 2.
GUID-54404411-CD8E-4277-A0A1-80B31CBD45EC V1 EN
Figure 56: Residual overvoltage protection

Functional diagram for disturbance recorder and trip circuit supervision

The disturbance recorder has 64 digital inputs, of which 35 are connected as default.
All start and operate signals from the protection stages are routed either to trigger the
disturbance recorder or to be recorded by the disturbance recorder depending on the
parameter settings. Additionally, the selected autorecloser, the ARC protection
signals and the three binary inputs from X120 are also connected.
1MRS756378 D
REF615
Application Manual