Power Cable Accessories

RSTI – Screened, separable T-connection system for gas-insulated switchgear with
bushings according to EN 50181 type C (400/630A), 10 kV, 15 kV, 20 kV and 35 kV
Raychem screened separable connectors
are designed to connect single-core
polymeric insulated cables to gasinsulated
switchgear or other equipment
with bushings according to EN 50181
type C up to 42 kV. Connections can be
made in a right-angle configuration, also
for 2 or 3 cables in parallel, such
configurations require mechanical fixing
of each cable in the switchgear.
For connections to 1250 A rated bushings
with profile according to EN 505181 type
C, parallel connections are possible with
each RSTI rated for max. 630A.
Made of a highly modified silicone rubber
and protected with a thick wall moulded
outer conductive shield connected to
earth, Raychem screened connectors
RSTI are thus suitable for both indoor and
outdoor installations. Oversheath testing
can be performed without removal of the
screened connector
The modern design and material selection
in combination with the Raychem
designed high performance mechanical
lug allows a large application range,
covering most common cable sizes with
just one kit.
The overall and cut back dimensions are
designed for use of minimum space
required in the termination box, even
double connections fit within most
standard boxes.
Raychem screened connectors RSTI are
equipped with a capacitive test point to
determine if the circuit is energised. The
capacitive test point is protected by a
conductive cap.
The screened cable connector
exceeds the requirements of
CENELEC HD 629.1 S1 which includes
BS, VDE and other international
specifications.
Installation
After cable preparation, the lubricated
stress control adapter is simply slid into
place. The high performance multi range
mechanical lugs are quickly installed by
shearing off the bolts. When lubricated,
the screened connector body can easily
be slid onto the cable end and fixed to the
bushing by a threaded pin and nut. The
open end is sealed by a backplug or by a
connection plug, which allows parallel
connection of two cables.
4 2
1
2
3
4
Double connections
For double connections of RSTI-56 series
a T-connector and a coupling connector
(2 T-connectors and a connection plug)
have to be ordered. Installation
dimensions D/d/H of 290 (365)/125 (175)/
285 mm are required.
For double connections of RSTI-76 series
a T-connector and a coupling connector
have to be ordered. Installation dimensions
D/d/H of 325/125/300 mm are
required.
5
Cut-away drawing of
RSTI-56 series T-connector
1Mechanical lug
2 Screened body
3 Stress cone adapter
4 Earthing eye and ground lead
5 Threaded pin
6 Back plug with test point
7 Test point
8 Conductive endcap
D
d
Configuration of RSTI-56 as double
T-connection
6
7
8
H