einzustellen ist. Dies stellt einen Unterschied zum dreiphasigen Anschluss dar, bei dem der Schwellwert grund-
sätzlich eine verkettete Größe ist, siehe auch Abschnitt 2.6.4 Setting Notes.
Functional logic, scope of settings and information of this function are described in Section 2.6 Voltage
Protection 27, 59.
Frequency Protection (81 Elements)
Depending on the configuration in address 240, frequency protection is either operated by a phase-to-ground
or a phase-to-phase voltage. A maximum voltage may be configured. If the value set is undershot, frequency
protection is blocked. Therefore, if the device is connected to a phase-to-ground voltage, set the phase voltage
threshold. If connected to a phase-to-phase voltage, set the phase-to-phase voltage threshold.
Functional logic, scope of settings and information of this function are described in Section 2.9 Frequency
Protection 81 O/U.
Directional Time Overcurrent Protection (67 and 67N Elements)
If the device is connected to only one voltage transformer, the function is set to inactive and hidden.
Synchronization
The synchronization function can be applied without any restrictions. Connection examples are shown in the
following figure and in the Appendix, C Connection Examples.
[anschluss-sj64-einphas-l1-e-250902-kn, 1, en_US]
Figure 2-150 Connection example of a single-phase voltage transformer for 7SJ64 (phase-to-ground
voltages)
If the phases of voltages V1 and V2 differ, phase displacement may be adjusted in address 6122 ANGLE
ADJUSTM..
(Sensitive) Ground Fault Detection (64, 50Ns, 67Ns)
The directional functionality and the displacement voltage element of this function cannot be applied since
there is no displacement voltage. Current elements of this function, however, can be operated in non-direc-
tional mode
Except for the above-mentioned restriction the functional logic, scope of settings and information are
described in Section 2.13 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s).
Functions
2.26 Protection for Single-phase Voltage Transformer Connection
350 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
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