Analog Channel Configuration - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.7.2.4
4.7.2.5
922

Analog channel configuration

OOSRPSB has two analog group inputs which must be properly configured.
Table 856: Analog inputs
Input
I3P
U3P
See the preprocessing function blocks in this document for the
possible signal sources.
There are a few special conditions which must be noted with the configuration.
Table 857: Special conditions
Condition
U3P connected to real measurements
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings. For
troubleshooting, check the contents of this chapter and also the preprocessing blocks
in this document. The configuration can be written to the protection relay once the
mismatch is corrected.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The operation of OOSRPSB can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
I
1
I3P
I
Impedance
2
calculation
U
U3P 1
DISABLE
Blocking
BLOCK
GUID-A2203BB8-0B1D-4868-9615-544BE1F55423 V1 EN
Figure 500: Functional module diagram
Description
Three-phase currents
Three-phase voltages
Description
The function can work with any two voltage
channels connected but it is recommended to
connect all three voltage channels.
Out of step
detection
SWING_OP
logic
1MRS759142 C
OPERATE
SWING
OSB
OSB_Z2
Technical Manual
REX640