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1
1.6 Interface and Terminals
1.6.7
Electrical Connection
WARNING
Warning about dangerous voltages when operating an electrical device.
Nonobservance of the safety instructions means that death, severe
injuries or considerable material damages can occur.
•
Only qualified people shall work on and around this device. They must be thoroughly familiar
with all warnings and safety notices in this instruction manual as well as with the applicable
safety steps, safety regulations, and precautionary measures.
•
The following work is partly carried out at existence endangering voltages.
Note
•
During electrical installation, all rules and regulations for power systems must be observed.
•
For measurements in three-phase networks without neutral in V-connection and a nominal
voltage of U
range to be parameterized is then also U
•
Short-circuit the current transformer secondary circuits before current connections to the
device are opened.
•
The protective ground terminal of the device must be connected to the protective ground of
the panel or cubicle.
•
For connection of an auxiliary DC voltage, the correct polarity must be used.
•
All of the terminals should be checked to verify proper connections.
•
The polarities and phasing of all instrument transformers should be checked.
•
Use screw-type terminals for 2.5 mm
•
In IT networks, the SICAM P cannot be connected directly because the voltage is measured
against the PE conductor connection and the input impedance of the device causes a leak-
age current against earth. The leakage current can cause tripping of the leakage protective
system in IT networks. Please make sure that the maximum permissible input voltage of the
SICAM P against earth U
phase). Voltage transformers must be used in IT networks.
•
Before initially energizing the device with supply voltage, it shall be situated in the operating
area for at least two hours to ensure temperature equalization and to avoid humidity and con-
densation problems.
32
= 690 V, the voltage must be transformed to U
LL
2
.
= 480 V is not exceeded (e.g., due to an earth fault of one
L-PE
≤ 400 V. The measuring
LL
= 690 V.
LL
Power Meter SICAM P 7KG7750/55, Manual
E50417-B1076-C340-A6, Edition 09.2013
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