3.6.2.2 Predefined disturbance recorder connections
Table 24: Predefined analog channel setup
Channel
Description
1 IL1
2 IL2
3 IL3
4 Io
5 Uo
6 U1
7 U2
8 U3
Additionally, all the digital inputs that are connected by default are also enabled with
the setting. Default triggering settings are selected depending on the connected input
signal type. Typically all protection START signals are selected to trigger the
disturbance recorded by default.
3.6.3 Functional diagrams
The functional diagrams describe the default input, output, programmable LED,
switch group and function-to-function connections. The default connections can be
viewed and changed with switch groups in PCM600, LHMI and WHMI according to
the application requirements.
The analog channels have fixed connections towards the different function blocks
inside the protection relay’s configuration. Exceptions from this rule are the eight
analog channels available for the disturbance recorder function. These channels are
freely selectable and a part of the disturbance recorder’s parameter settings.
The analog channels are assigned to different functions. The common signal marked
with 3I represents the three phase currents. The signal marked with Io represents the
measured residual current via a core balance current transformer. The signal marked
with Uo represents the measured residual voltage via open-delta connected voltage
transformers.
The EFHPTOC protection function block for double (cross-country) earth-faults uses
the calculated residual current originating from the measured phase currents.
3.6.3.1 Functional diagrams for protection
The functional diagrams describe the protection functionality of the protection relay
in detail and picture the factory default connections.
Section 3 1MRS757456 D
REF611 standardized configurations
124 REF611
Application Manual
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