Checking System Connections - Siemens SIPROTEC 7SA522 Manual

Communication
Converter
Further Connec-
tions
3.2.3

Checking System Connections

7SA522 Manual
C53000-G1176-C155-3
Optical fibres are usually used for the connections between the devices and commu-
nication converters. The optical fibres are checked in the same manner as the optical
fibre direct connection which means for every protection data interface.
Make sure that under address  &211(&  29(5 or  &211(&  29(5
the correct connection type is parameterized.
For further connections a visual control is sufficient for the time being. Electrical and
functional controls are performed during commissioning (see the following main sec-
tion).
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, the device should be in the final oper-
ating environment for at least 2 hours to equalize the temperature, to minimize humid-
ity and avoid condensation. Connections are checked with the device at its final loca-
tion. The plant must first be switched off and earthed.
Proceed as follows in order to check the system connections:
• Protective switches for the power supply and the measured voltages must be
opened.
• Check the continuity of all current and voltage transformer connections against the
system and connection diagrams:
– Are the current transformers earthed properly?
– Are the polarities of the current transformers the same?
– Is the phase relationship of the current transformers correct?
– Are the voltage transformers earthed properly?
– Are the polarities of the voltage transformers correct?
– Is the phase relationship of the voltage transformers correct?
3.2 Checking Connections
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