Connecting Surge Arresters - Siemens NXPLUS C Installation And Operating Instructions Manual

Installation
108/172
Bolt the cable-type current transformers

4 saucer-head bolts
Lead the cable shield

at the earthing point
Swing the high-voltage cables

and connect the cable plugs
plugs").
Mount the cable compartment cover.

15.4

Connecting surge arresters

Suitable surge arresters are listed in the operating instructions (see page 22, "Possible
combinations of cable connection types (T-plugs, coupling inserts) and surge arresters in
NXPLUS C Wind up to 36 kV").
NOTE!
For certain surge arrester types in the circuit-breaker panel, the surge arresters protrude
through the floor cover into the cable basement (see page 22, "Cable connection").
Provide additional core drillings for the surge arresters.

The surge arresters are supplied with the supplementary equipment. Depending on their
version, they are pre-assembled with a support.
If a power-frequency voltage test is planned at site after installation (see page 126,
"Performing the power- frequency voltage test"), do not fit the surge arresters and cables yet.
Mount the surge arresters according to the manufacturer's assembly instructions.

Ensure earth connection of the surge arrester according to the manufacturer's assembly

instructions.
Fig. 99: Mounted surge arrester (example)
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9
onto the transformer mounting plate
, washers and hexagonal nuts
back through the cable-type current transformer
.
in together with the cable-type current transformers
to the cable feeder (see page 99, "Connecting cable T-
using
each.
, and bolt tight
,