Siemens SENTRON, Manual

Page: 42 / 224

Connection
6.2 Connecting the main circuit
42
Manual, 08/2017, L1V30368969104A-02
6.2.4 Connection of transfer switching equipment for current ratings 250 A to 1600 A
The connection of current ratings 250 A to 1600 A to the main circuit is described in the
following section.
To connect the 3KC4 and 3KC8 transfer switching equipment properly, you must first mount
the bridging bar accessories on the load side. The steps listed below describe the mounting
of the bridging bars and connection to the power supply systems.
6.2.4.1 Connecting bridging bars on the load side
WARNING
Hazardous voltage!
Ensure there is no live voltage before beginning to mount the bridging bars.
Current ratings 250 A to 1600 A require bridging bars. These serve as a bridge for the load-
side connection and they can be mounted either on the top or bottom of the transfer
switching equipment.
The bridging bars are not included with the transfer switch and must be ordered as
accessories.
Figure 6-10 Bridging bar current ratings 250 A to 630 A
Figure 6-11 Bridging bar current ratings 800 A to 1600 A
Mounting bridging bars for current ratings 250 A to 630 A
The following steps are necessary for mounting the bridging bars on the transfer switching
equipment. Refer to the table for information about the bolts, tools, and tightening torques.
The bolts are not included with the transfer switch. You can find more detailed information on
the bridging bars in the section titled Bridging bars (Page 154).