Rack Mounting And Cubicle Mounting - Siemens siprotec 7SD5 User Manual

3 Mounting and Commissioning
3.1.3.2

Rack Mounting and Cubicle Mounting

Two mounting rails are required for installing a device into a frame or cabinet. The or-
dering codes are stated in the Appendix, Section A.1
For the
housing size (Figure 3-16) there are six covers and six holes.
• Screw on loosely the two angle brackets in the rack or cabinet, each with four
• Remove the 4 covers at the corners of the front cover, for housing size
• Fasten the device to the mounting brackets with four or six screws.
• Mount the four or six covers.
• Tighten fast the eight screws of the angle brackets in the rack or cabinet.
• Screw down a robust low-ohmic protective earth or station earth to the rear of the
• Connections use the plug terminals or screw terminals on the rear side of the device
468
1
/ housing size (Figure 3-15), there are four covers and four holes. For the
2
screws.
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.
device using at least an M4 screw. The cross-sectional area of the earth wire must
be equal to the cross-sectional area of any other conductor connected to the device.
The cross-section of the earth wire must be at least 2.5 mm
in accordance the wiring diagram.
For screw connections with forked lugs or direct connection, before inserting wires
the screws must be tightened so that the screw heads are flush with the outer edge
of the connection block.
A ring lug must be centred in the connection chamber so 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.
1
/
1
1
/ the two
1
2
.
7SD5 Manual
C53000-G1176-C169-1