Siemens H-compact PLUS, Operating Instructions Manual

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Connection
6.1 Electrical connection
WOGeneric TEAAC / 2008
Siemens AG Operating Instructions 1.03 1RQ671...-Z
27
6.1.4 Cable entry and routing
Cable entry and routing
A plate is bolted into the terminal box enclosure via a rectangular cut-out, through which the
connecting cables are introduced. Normally, this cable entry plate is supplied without
threaded holes for the cable glands, so that the number and size of the cable glands can be
adapted to the application conditions.
Proceed as follows:
1. Unscrew the cable entry plate.
2. Drill the required number of holes or a thread in the required size into the cable entry
plate.
3. Mount the cable entry plate and the cables with the cable glands onto the terminal box.
4. Remove the insulation from the conductor ends so that the remaining insulation is almost
long enough to reach the cable lug. Comply with the specified air gaps for uninsulated
live components (see table).
Table 6-4 Minimum air gaps for uninsulated live components
Voltages Air clearance
Up to 6.6 kV Minimum 60 mm
Up to 11 kV Minimum 100mm
Up to 13.8 kV Minimum 140 mm
[ID 1015.01x]
6.1.5 Connecting the power cables
Terminal box
The type designation of the terminal box for connecting the power cables can be found in the
"Technical specifications" section; see "Main terminal box" in the spare parts list for a
diagram of the terminal box.
Normally, in-house terminal boxes are fitted. For special connection systems (e.g. boxes with
segregated phases or plug-and-socket connection), follow the instructions provided by the
manufacturer of these systems and comply with special conditions laid down in the
certificate.
The in-house terminal boxes are usually certified for type of protection Ex e. In a special
version (which must be specifically ordered), the entry holes may have one or more threads
or holes suitable for the use of screwed joints that must be certified for use in Zone 1. You
must observe the installation and operation conditions specified in the certificate for these
screwed joints and check that they are complied with.
The following conditions for connection with cable lugs are defined in the certificates for in-
house terminal boxes in the section "Connection with cable lugs". They must be observed.