The operating time characteristic is according to the definite time (DT).
MFADPSDE contains a blocking functionality to block function outputs, timers or
the function itself.
4.2.9.4 Analog channel configuration
MFADPSDE has two analog group inputs which must be properly configured.
Table 613: Analog inputs
Input Description
IRES Residual current (measured or calculated)
URES Residual voltage (measured or calculated)
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 614: Special conditions
Condition Description
URES calculated The function requires that all three voltage
channels are connected for calculating the re-
sidual voltage. Setting
VT connection
must
be "Wye" in that particular UTVTR.
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.
4.2.9.5 Operation principle
The
Operation
setting is used to enable or disable the function. The corresponding
parameter values are "on" and "off".
The operation of MFADPSDE can be described using a module diagram. All the
modules in the diagram are explained in the following sections.
1MRS759142 F
Protection functions
REX640
Technical Manual
555
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