72
•
All of the terminals should be checked to verify proper
connections.
•
The polarities and phasing of all instrument transform-
ers should be checked.
•
Before initial energization with supply voltage, the de-
vice shall be situated in the operating area for at least
two hours to ensure temperature equalization and to
avoid humidity and condensation problems.
Notes for measurings
•
For measurements in three-phase networks without
neutral in V-connection and a nominal voltage of
U
LL
= 690 V, the voltage must be transformed to
U
LL
≤
400 V. The measuring range to be parameterized
is then also U
LL
= 690 V.
•
In IT networks, the SIMEAS P cannot be connected
directly because the voltage is measured against the PE
conductor connection and the input impedance of the
device causes a leakage current against earth. The leak-
age current can cause tripping of the leakage protective
system in IT networks. Please make sure that the
maximum permissible input voltage of the SIMEAS P
against earth U
L-PE
= 480 V is not exceeded (e.g., due to
an earth fault of one phase). Voltage transformers must
be used in IT networks.
Summary of Contents for SIMEAS P 7KG7750
Page 23: ...21 Abbildung 2 7KG7750 Variante IP 65 ...
Page 35: ...33 Einphasen Wechselstrom Dreileiter Drehstrom gleiche Belastung ...
Page 36: ...34 Dreileiter Drehstrom beliebige Belastung Vierleiter Drehstrom gleiche Belastung ...
Page 53: ...51 2 7 Block Diagram ...
Page 64: ...62 Figure 2 7KG7750 variant IP 65 ...
Page 76: ...74 Single phase AC current Three wire three phase balanced ...
Page 77: ...75 Three wire three phase unbalanced Four wire three phase balanced ...
Page 87: ...85 Notes ...