Instruction - 11-12kV Heat Shrink Cable Terminations XLPE EPR 3 Core

Instruction - 11-12kV Heat Shrink Cable Terminations XLPE EPR 3 Core
WWW.CABLEJOINTS.CO.UK
THORNE & DERRICK UK
TEL 0044 191 490 1547 FAX 0044 477 5371
TEL 0044 117 977 4647 FAX 0044 977 5582
WWW.THORNEANDDERRICK.CO.UK
I n st a lla t ion I n st r u ct ion
H e a t sh r in k Te r m in a t ion For 3 Cor e
Polym e r ic Ca ble s 7 .2 k V t o 3 6 k V
I N D OOR
OUTD OOR
ISSUE DATE: 05.01.11
Ge n e r a l Fit t in g I n st r u ct ion s
*
I t is h igh ly r e com m e n de d t h a t a t ool su it a ble for t h e r e m ova l of t h e
se m i- con du ct ive scr e e n is u se d t o pr ovide a r e lia ble disch a r ge fr e e
t e r m in a t ion scr e e n poin t
*
Use a pr opa n e ga s t or ch w it h a soft fla m e
*
Avoid a pe n cil lik e blu e fla m e w h ich is ca u se d by u n r e gu la t e d su pply
*
Ke e p t h e fla m e on t h e m ove t o e n su r e e ve n sh r in k a ge of a ll t h e
m a t e r ia ls a n d a lso h e lps t o r e du ce scor ch in g
*
En su r e t h a t a ll com pon e n t s a r e k e pt cle a n a n d gr e a se fr e e du r in g
in st a lla t ion
*
Allow t o cool be for e a pplyin g a n y m e ch a n ica l st r a in
Re m ove Ou t e r Ca ble Sh e a t h :
VOLTAGE
INDOOR
L
OUTDOOR
L
7.2kV
650mm
650mm
12kV
650mm
650mm
LENGTH OF LUG
17.5kV
650mm
650mm
BARREL + 10%
24kV
650mm
800mm
36kV
800mm
800mm
X
Ta ble 1
N ot e :- Dimension “L” is a guide only. The actual length is determined by
the overall geometry of the equipment.
3 Cor e Ca ble W it h Ar m ou r
If the cable is armoured, bonding of the armours must be completed using the appropriate
armour earthing kit.
A) For indoor terminations (cable end box) - Order kits Ref: SPS 180, SPS 193 *
B) For outdoor terminations (pole top) - Please advise conductor size and voltage.
*
SPS 180 - 16-95mm2 at 7.2 to 17.5kV
SPS 193 - 120-300mm2 at 7.2 to 17.5kV
(For other voltages see selection chart in general catalogue)
IMPORTANT NOTICE TO PURCHASER:- Sellers and Manufacturere’s only obligation shall be to replace such quantity of the product proved to be defective. Neither the Seller nor
Manufacturer shall be liable for any injury, loss or damage, direct or consequential, arising out of the use or inability to use the product. Before using, User shall determine the
suitability of the product for his or her intended use and User assumes all risk and liability whatsoever in connection therewith.
1 . I n st a lla t ion
Bushing centre
X
Prepare the cable as shown.
L
100mm
Bedding
100mm
Armours
N ot e :- The “L” dimension should not be
longer than the distance between bushing
centres and base plate.
De-grease and abrade the cable for a
distance of 100mm below the outer
sheath cut.
N ot e :- User may wish to alter bedding
and armour dimensions to suit the type of
gland/earthing arrangement to be used.
2 . Scr e e n Pr e pa r a t ion
Coppe r W ir e Scr e e n
Apply one layer of sealant tape around the
outer cable sheath 30mm below the
sheath cut.
30mm
Bend back each screen wire and press
them into the sealant tape. Apply another
layer of tape over the bent back wires.
SEALANT TAPE
Coppe r Ta pe Scr e e n
ROLL
SPRINGS
COPPER TAPE
SCREEN
Secure the earth braids to the copper tape
screens so that the solder block is
positioned upon the cable bedding. A turn
of mastic tape should be applied beneath
and on top of the solder block.
100mm
If a constant force spring is used to
connect the earth braids, the spring
should preferably be positioned above the
fingers of the breakout boot.
SEALANT TAPE
COPPER
BRAIDS
X
A
Remove the copper tape screen to length
A+X as indicated in Table 2.
N ot e :- If the cores are to be crossed the
copper screen should be removed after
the initial setting of the cores.
It may be necessary to temporarily secure
the copper tapes to prevent them from
unwinding.
VOLTAGE
7.2kV
12kV
17.5kV
24kV
36kV
A
130mm
185mm
185mm
310mm
460mm
B
110mm
165mm
165mm
290mm
440mm
X
LUG BARREL
LENGTH
+5MM
Ta ble 2
3 . Con du ct ive La ye r Tr e a t m e n t
B
B
Ex t r u de d Con du ct ive Scr e e n La ye r
Remove the semi-conductive screen layer
using a suitable tool to dimension B+X as
indicated in Table 2.
N ot e :- It is very important that the
screen is removed leaving a clean straight
cut and that no scoring or damage is done
to the primary insulation. We highly
recommend the use of approved screen
removal tools (please ask for details). It is
good practice to flame brush the primary
insulation and conductive screen cut. This
has the effect of removing any minor
surface irregularities or burrs that may be
present.
YELLOW STRESS
CONTROL TAPE
Apply St r e ss Con t r ol Ta pe
De-grease the insulation and screen using
the solvent tissues provided.
10mm
Remove the release paper from the Yellow
Stress Control Tape (TS31785Y). Stretch
to approx. 50% width and apply the tape
around the end of each core screen to
cover the copper tape (If present) and
insulation by 10mm either way.
10mm
COPPER TAPE
SCREEN
4 . St r e ss Con t r ol Tu be s
Position the stress control tubes onto each
core so that the bottom of each tube is
covering the yellow stress control mastic
by approx 10mm.
Starting at the end closest to the cable
crutch, Shrink each tube one at a time
keep the flame on the move to ensure an
even wall thickness.
5 . I n st a llin g Ca ble Lu gs
Remove the insulation from each core to
the X dimension in Table 1.
Install cable lug and remove any burrs or
sharp points that may be present.
X
Preheat each lug and wrap two layers of
red sealant tape over the lug barrel and
extend onto the insulation by approx
10mm.
ROLL
SPRINGS
6 . I nst a lling The Brea k out Boot
Slide the three legged boot over the cores
and push down into the crutch of the
cable. Shrink from the shoulder of the
breakout and down to the cable sheath,
then from the shoulder to the cores.
Apply a turn of red sealant tape around
each breakout turret as shown.
7 . I nstalling The Anti- Track Tube
Position the anti-track tubes so that they
cover the turrets of the breakout boot and
the barrels of the lugs.
RED SEALANT
TAPE
ANTI-TRACK
TUBE
Starting from the cable crutch area,
Shrink the tubes in place. Keeping the
flame moving to ensure an even wall
thickness, ensure the tubes are fully
recovered and wrinkle free.
Allow the tubes to cool to hand hot and
trim at the lug end with a sharp knife if
necessary.
AIR CLEARANCE TO
LOCAL SPEC
To ensure long term performance of
medium voltage terminations, certain
separation distances are required as
indicated in Table 3.
E
d
I n door Te r m in a t ion s
d
DISTANCE (d) PHASE/PHASE
& PHASE/GROUND
VOLTAGE
d (mm)
7.2kV
15mm
12kV
20mm
17.5kV
20mm
24kV
40mm
36kV
50mm
TOP OF STRESS TUBE
TO LUG BARREL
E
30mm
50mm
75mm
95mm
250mm
Ta ble 3
N ot e :- Bushing protection boots will be
required for the majority of installations.
If it is necessary to cross the cores, the
cross M UST be in a screened area as
shown.
8 . I n st a lla t ion Of Ra in Sh e ds
On outdoor terminations the sheds should
be fitted from the bottom up as indicated
in the drawing opposite.
Indoor 36kV terminations are supplied
with one shed per phase and four sheds
per phase for outdoor.
d =
SEE
TABLE 4
80mm
NUMBER OF SHEDS PER PHASE
VOLTAGE
INDOOR
OUTDOOR
7.2kV
1
12kV
2
17.5kV
2
24kV
3
36kV
1
4
Ta ble 4
200mm
The first shed should be fitted at a
distance 200mm from the lower edge of
the anti-track tube to the edge of the
shed. All subsequent sheds should be
fitted at a distance of 80mm from edge to
edge.
N ot e :- It is advisable not to position rain
sheds at the top of stress control tubes,
re-position if necessary.
I n ve r t e d Con n e ct ion s
If a termination is to mounted for connection from above the equipment i.e in the
inverted position, sheds should be
installed through 180° as shown
Ca ble Be n din g Ra diu s
MIN BENDING
RADIUS r = 15xD
During installation care should be taken
not to over bend the cable. In cold
condition it may be necessary to gently
heat the cable to prevent damage whilst
D
WWW.CABLEJOINTS.CO.UK
THORNE & DERRICK UK
TEL 0044 191 490 1547 FAX 0044 477 5371
TEL 0044 117 977 4647 FAX 0044 977 5582
WWW.THORNEANDDERRICK.CO.UK
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