3 Mounting and Commissioning
466
7SD5 Manual
C53000-G1176-C169-1
3.1.2.5 Reassembly
The reassembly of the device is carried out in the following steps:
• Insert the boards carefully into the housing. The mounting locations of the boards
are shown in Figures 3-3 and 3-4. For the model of the device designed for surface
mounting, use the metal lever to insert the processor board C-CPU-1. Installation is
easier with the lever.
• First plug in the plug connectors of the ribbon cable onto the input/output boards I/O
and then onto the processor board C-CPU-1. Be careful not to bend connecting
pins! Don´t use force!
• Connect the plug connectors of the ribbon cable between the processor board C-
CPU-1 and the front panel to the front panel plug connector.
• Press plug connector interlocks together.
• Replace the front panel and screw it tightly to the housing.
• Put the covers back on.
• Re-fasten the interfaces on the rear of the device housing. This activity is not nec-
essary if the device is designed for surface mounting.
3.1.3 Mounting
3.1.3.1 Panel Flush Mounting
Depending on the version, the device housing can be
1
/
2
or
1
/
1
. With housing size
1
/
2
,
there are four covers and four holes, as shown in Figure 3-13. There are six covers
and six holes for the full housing size
1
/
1
, as indicated in Figure 3-14.
• Remove the 4 covers at the corners of the front cover, for housing size
1
/
1
the two
covers located centrally at the top and bottom also have to be removed. The 4 or 6
elongated holes in the mounting bracket are revealed and can be accessed.
• Insert the device into the panel cut-out and fasten it with four or six screws. For di-
mensions refer to Section 4.25.
• Mount the four or six covers.
• Connect the earth on the rear plate of the device to the protective earth of the panel.
Use at least one M4 screw for the device earth. The cross-sectional area of the
earth wire must be equal to the cross-sectional area of any other control conductor
connected to the device. The cross-section of the earth wire must be at least 2.5
mm
2
.
• Connect the plug terminals and/or the screwed terminals on the rear side of the
device according to the wiring diagram of the panel.
When using forked lugs for direct connections or screw terminal, the screws, before
having inserted the lugs and wires, must be tightened in such a way that the screw
heads are even with the terminal block.
A ring lug must be centred in the connection chamber, in such a way that the screw
thread fits in the hole of the lug.
The SIPROTEC
®
4 System Description has pertinent information regarding wire
size, lugs, bending radii, etc. You will find hints in the short description included in
the device.
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