Siemens SIPROTEC 7VU681, Руководство пользователя

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Mounting And Commissioning
3.2 Checking Connection
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012 79
Table 3-18 D-subminiature connector assignment of the time synchronization interface
1)
Assigned, but not used
3.2.5 Optical Fibres
WARNING!
Do not look directly into the fibre-optic elements!
The transmission via fibre optics is particularly insensitive to electromagnetic interference and thus ensures
galvanic isolation of the connection. Transmit and receive connections are shown with the symbols for transmit
and for receive.
The character idle state for the optical fibre interface is "Light off". If the character idle state is to be changed,
use the operating program DIGSI, as described in the SIPROTEC 4 System Description.
3.2.6 Checking Device Connection
General
By checking the device connections the correct installation of the protection device e.g. in the cubicle must be
tested and ensured. This includes wiring check and functionality as per drawings, visual assessment of the pro-
tection system, and a simplified functional check of the protection device.
Auxiliary Voltage Supply
Before the device is connected for the first time to voltage, it should be have been at least 2 hours in its oper-
ating room, in order to attain temperature equilibrium and to avoid dampness and condensation.
Note
If a redundant supply is used, there must be a permanent, i.e. uninterruptible connection between the minus
polarity connectors of system 1 and system 2 of the DC voltage supply (no switching device, no fuse), because
otherwise there is a risk of voltage doubling in case of a double earth fault.
Switch on the auxiliary voltage circuit breaker (supply protection), check voltage polarity and amplitude at the
device terminals or at the connection modules.
Pin No. Designation Signal Meaning
1 P24_TSIG Input 24 V
2 P5_TSIG Input 5 V
3 M_TSIG Return Line
4 M_TSYNC
1)
Return Line
1)
5 Shield Shield Potential
6 – –
7 P12_TSIG Input 12 V
8 P_TSYNC
1)
Input 24 V
1)
9 SHIELD Shield Potential