Siemens SIPROTEC 7UT613 series Manual page 371

Figure 3-18 Installation of a 7UT613 in a rack or cubicle (housing size
7UT613/63x Manual
C53000-G1176-C160-2
2 mounting brackets are required for incorporating a device in a rack or cubicle. The
order numbers can be found in the Appendix under A.1.
• Loosely screw the two mounting brackets in the rack with four screws.
• Remove the 4 or 6 caps on the corners of the front cover to reveal the 4 or 6 elon-
gated holes in the mounting bracket.
• Fasten the device to the mounting brackets with 4 or 6 screws (refer to Figure 4.23
for dimensions).
• 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
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
• Connections use the plug terminals or screw terminals on the rear side of the device
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, in such a way that the screw thread fits in the
hole of the lug. The SIPROTEC 4 System Description /1/ has pertinent information
regarding wire size, lugs, bending radii, etc.
3.1 Mounting and Connections
2
.
1
/ ) — example
2
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