Power Plant Connections - Siemens siprotec 7SD5 User Manual

3 Mounting and Commissioning
Communication Optical fibres are usually used for the connections between the devices and commu-
Converter nication converters. The optical fibres are checked in the same manner as the optical
fibre direct connection which means for every protection data interface.
Verify in address 4502 CONNEC. 1 OVER and/or 4602 CONNEC. 2 OVER (see also
Section 2.2.2.1) that the right connection type is parameterized.
Further For further connections a visual inspection is sufficient for the time being. Electrical
Connections and functional controls are performed during commissioning (see the following main
section).
3.2.3

Power Plant Connections

WARNING!
Warning of dangerous voltages
Non-observance of the following measures can result in death, personal injury or sub-
stantial property damage.
Therefore, only qualified people who are familiar with and adhere to the safety proce-
dures and precautionary measures shall perform the inspection steps.
Caution!
Be careful when operating the device on a battery charger without a battery
Non-observance of the following measure can lead to unusually high voltages and
consequently, the destruction of the device.
Do not operate the device on a battery charger without a connected battery. (For limit
values see also Technical Data, Section 4.1).
Before the device is energized for the first time, it should be in the final operating en-
vironment for at least 2 hours to equalize the temperature, to minimize humidity and
avoid condensation. Connections are checked with the device at its final location. The
plant must first be switched off and earthed.
Connection examples for current transformer connections are provided in the Appen-
dix A.3. Please observe the plant diagrams, too.
Proceed as follows in order to check the system connections:
• Protective switches for the power supply and the measured voltages must be
• Check the continuity of all current and voltage transformer connections against the
474
opened.
system and connection diagrams:
– Are the current transformers earthed correctly?
– Are the polarities of the current transformers the same?
– Is the phase relationship of the current transformers correct?
– Are the voltage transformers earthed correctly (if used)?
7SD5 Manual
C53000-G1176-C169-1