medium voltage BUSBAR SYSTEMS
SILICONE PRODUCTS for industrial use
Completing the picture
based on experience is the future
nkt cables GmbH
1999 nKt a/s, denmark, merged with felten & Guilleaume
Kabelwerke Gmbh in Germany to form nkt cables group
GmbH with headquarters in cologne. nkt cables group GmbH
is owned by nKt holding a/s, an industrial group of companies
employing some 8.800 people.
developing and manufacturing of house service boxes, cable
distribution cabinets and cable accessories up to 145 kV is
one of the core businesses of nkt cables group GmbH. since
more than 60 years nkt cables GmbH nordenham, Germany
(formerly f&G Kabelgarnituren Gmbh) is one of the world
market leaders in power cable accessories.
as the first company introducing silicone rubber terminations
already in the sixties, nkt cables GmbH, nordenham is specialized in production of silicone rubber power cable accessories.
the product range covers cable joints, cable connectors for
sf6-switchgears and transformers as well as indoor- and outdoor terminations.
tailored products are complementing the product spectrum,
e.g. the bus bar system for interconnection of sf6-switchgears,
which was established in 1993. until now more than 180.000
busbars where installed from our international customers. additionally a large assortment of accessories for our busbar system
is available.
in our housing department cable distribution cabinets, metering
pillars, house service boxes, street lightning cabinets and ready
solutions for controlling, traffic lights and many more applications were produced.
Silicone rubber
silicone rubber is a preferred material for cable accessories due
to its excellent mechanical and electrical properties. for more
than 40 years silicone has been used successfully as high-quality electrical insulation for voltages up to 400 kV. silicone rubber
features high quality electrical insulation, superior corona and
tracking resistance, combined with high elasticity.
property
track resistance 2,5 kV;
6 kV
dimension Value
passed hKclass 1
standard
Vde 0441
Volume resistivity at 23°
Ω x cm
8 x 1014
din 53482
dielectric losses factor
tan δ
< 0,004
din 53483
dielectric strength
kV / mm
> 20
din 53481
dielectric constant
at 50 hz
er
2,8 ±0,2
din 53483
temperature resistance
°c
-50 ... + 180
(permanent)
up to + 250
(short periods)
iec 216
arc resistance
sec.
250
astM
495-61
flammability,
self-extinguishing
-
V0
uL 94
ozone stability
-
no tearing
din 53509
uV- stability
-
> 2000 h
xenon-test
1200
thermal conductivity
W/mxK
0,25 ... 0,30
din 52612
stretch to tear
%
> 450
din 53504
tensile strength
n / mm²
>8
din 53504
tear resistance
n / mm
> 20
din 53515
shore a hardness,
approx.
-
30 - 50
din 53505
specific gravity
g / cm³
1,10 - 1,17
din 53479
it facilitates multi range application, where one silicone rubber
body can be used for various conductor cross sections. optimal
flexibility ensures easy assembly of the accessories. outstanding features of the silicone rubber insulation material are:
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
uV and ozone resistance
durable
weather and aging resistance
non-flammable, self-extinguishing, heat resistant
applicable for use at temperatures between -50° c and +180° c
high elasticity
high tracking resistance
no conductive material deposition
unlimited storage life
environmentally friendly
Special products for industrial use
High flexibility by own building of moulds
Silicone instead of rubber
at our work we can manufacture Grp and silicone moulds within shortest time according to your desires. With our processing
centres also complex forms can be provided flexibly and fast.
Many years of experience and continuing education enables our
team to realise even ambitious shapes and moulds for.
rubber is considered as cheap material; but if it concerns the
electrical and mechanical characteristics, silicone is the material
of the superlative. silicone also under direct sunlight won’t become inflexible or expose plasticiser. after releasing the moulds,
the silicone parts will be tempered one more time. thus all
volatile silicone components interlace to a homogeneous unit.
as proof: a fresh rubber product (and also from other plastics)
has a „aromatic“ smell. this odour develops from evenly these
volatile components, e.g. plasticiser. silicone products do not
smell, from the machine nor after long weathering. thus silicone
is even food safe and taste neutral.
usage modern cad systems for tool design enables a visual
simulation of finally designed parts and moulds. rejections and
injections miss are avoided. short start up time of the tool is the
result. the time needed from order intake until production release
of mould is very short an so tooling costs are relatively low.
also the other characteristics of silicone are excellent: especially
the tear strength plays a prominent role: other materials destroy
themselves with a damage by a laceration, while silicone keeps
stable because its cross-linking mesh structure. silicone is
weather and age-stably, uV and ozone-steadily, durably waterrejecting and not inflammable. not least silicone is halogen- and
flue gas missions free.
3
Busbar system 24 kV up to 1250 A
Busbar system with
end- and cross adapter
screened cross- and end-adapter and screened busbar for sf6
insulated switchgears with metal housing, connecting type c
according to en 50180, en 50181 and din 47636, max. system
voltage up to 24 kV, continuous nominal current 630/1250 a**.
✓
✓
✓
✓
✓
✓
variable busbar length from 226 - 1586 mm possible
fitting to all switchgears
quick and easy assembly
screening by outer conductive layer
integrated stress control system
various accessories available
· surge arrester
· cable connector, coupling connector
· voltage transformer adapter
✓ capacitive measuring point
Scope of delivery
✓
✓
✓
✓
✓
✓
✓
✓
3 cross- or end adapter
3 covering caps
3 insulating plugs
3 threaded bolts
6 contact shells
3 earthing strands
1 assembly instructions
accessories
technical data
Maximum system voltage
24 kV
rated current
1250 a
partial discharge at 2 u0
<10 pc
alternating withstand voltage (ac, 5 min.)
direct withstand voltage (dc, 15 min.)
impulse withstand voltage
57 kV
76 kV
125 kV
thermal short-circuit 3s
25 ka
dynamic short-circuit
63 ka
type
reference no.
end adapter
26 129 72 (1 set)
cross adapter
26 129 73 (1 set)
bus bar
26 450 ..* (1 piece)
*= length acc. to application
**for 1250 a appropriate bushing is mandatory
+2
L-0 *
83
Ø~32
127
max.
630/1250 a**
~240
max.
1250 a
*length acc. to application
L = Field distance = busbar length + 14 mm
Ø~54
max.
630/1250 a**
~225
Double busbar system 24 kV up to 2500 A
Busbar system with coupling
end- and coupling cross
adapter
screened coupling cross- and coupling end adapter and
screened busbar for sf6 insulated switchgears with metal housing for connection to screened busbar systems, max. system
voltage up to 24 kV, continuous nominal current 630/1250 a**.
technical data
Maximum system voltage
✓ doubling of the current load-carrying capacity by
parallel feed
✓ variable busbar length from 226 - 1586 mm possible
✓ quick and easy assembly
✓ screening by outer conductive layer
✓ integrated stress control system
✓ various accessories available
· surge arrester
· cable connector, coupling connector
· voltage transformer adapter
✓ capacitive measuring point
2500 a
partial discharge at 2 u0
<10 pc
alternating withstand voltage (ac, 5 min.)
direct withstand voltage (dc, 15 min.)
impulse withstand voltage
Scope of delivery
✓
✓
✓
✓
✓
✓
24 kV
rated current
3 coupling cross- or coupling end adapter
3 threaded bolts
6 contact shells
3 earthing strands
1 assembly instructions
accessories
57 kV
76 kV
125 kV
thermal short-circuit 3s
25 ka
dynamic short-circuit
63 ka
type
reference no.
coupling end adapter
26 219 70 (1 set)
coupling cross adapter
26 219 71 (1 set)
busbar
26 450 ..* (1 piece)
*= length acc. to application
**for 1250 a appropriate bushing is mandatory
+2
L-0 *
83
Ø~32
~240
max.
1250 a
max.
1250 a
max.
1250 a
max.
1250 a
Ø~54
*length acc. to application
L = Field distance
= busbar length + 14 mm
137
~365
127
max.
630/1250 a**
max.
630/1250 a**
5
Busbar system 36 kV up to 1250 A
Busbar system with end- and
cross adapter
screened cross- and end adapter and screened busbar for sf6
insulated switchgears with metal housing, connecting type c
according to en 50180, en 50181 and din 47636, max. system
voltage up to 36 kV, continuous nominal current 630/1250 a**.
✓
✓
✓
✓
✓
✓
variable busbar length from 226 - 1586 mm possible
fitting to all switchgears
quick and easy assembly
screening by outer conductive layer
integrated stress control system
various accessories available
· surge arrester
· cable connector, coupling connector
· voltage transformer adapter
✓ capacitive measuring point
Scope of delivery
✓
✓
✓
✓
✓
✓
✓
✓
3 cross- or end adapter
3 covering caps
3 insulating plugs
3 threaded bolts
6 contact shells
3 earthing strands
1 assembly instructions
accessories
technical data
Maximum system voltage
36 kV
rated current
1250 a
partial discharge at 2 u0
<10 pc
alternating withstand voltage (ac, 5 min.)
81 kV
direct withstand voltage (dc, 15 min.)
108 kV
impulse withstand voltage
170 kV
thermal short-circuit 3s
25 ka
dynamic short-circuit
63 ka
type
reference no.
end adapter
26 129 52 (1 set)
cross adapter
26 129 53 (1 set)
busbar
26 451 ..* (1 piece)
*= length acc. to application
**for 1250 a appropriate bushing is mandatory
+2
L-0 *
83
Ø~32
127
max.
630/1250 a**
~240
max.
1250 a
*length acc. to application
L = Field distance = busbar length + 14 mm
Ø~54
max.
630/1250 a**
~225
Busbar system 36 kV up to 2500 A
Busbar system with end- and
cross adapter
screened cross- and end adapter and screened busbar for sf6
insulated switchgears with metal housing, max. system voltage
up to 36 kV, continuous nominal current 2000/2500 a, depending upon the switchgear. special bushing according to nkt specifications or bushing type f necessary.
✓
✓
✓
✓
✓
variable busbar length from 582 - 1182 mm possible
quick and easy assembly
screening by outer conductive layer
integrated stress control system
various accessories available
· surge arrester
· cable connector, coupling connector
· voltage transformer adapter
✓ capacitive measuring point
✓ This cross- and endadapter is also for connection
to bushing type C available
Scope of delivery
✓
✓
✓
✓
✓
✓
✓
✓
3 cross- or end adapter
3 covering caps
3 insulating plugs
3 threaded bolts
6 contact shells
3 earthing strands
1 assembly instructions
accessories
technical data
Maximum system voltage
36 kV
rated current
2500 a
partial discharge at 2 u0
<10 pc
alternating withstand voltage (ac, 5 min.)
81 kV
direct withstand voltage (dc, 15 min.)
108 kV
impulse withstand voltage
170 kV
type
reference no. bushing type f
end adapter
26 129 88 (1 set)
cross adapter
26 129 89 (1 set)
busbar
26 484 ..* (1 piece)
*= length acc. to application
type
reference no. bushing type c
end adapter
26 526 88 (1 set)
cross adapter
26 526 89 (1 set)
+2
L-0 *
~260
Ø~50
max.
2500 a
Ø~74
~275
~160
max.
2500 a
*length acc. to application
L = Field distance
= busbar length + 18 mm
max.
2500 a
7
Surge arrester
CSA 24 for connection onto
busbar systems for 24 kV
csa 24 is a metal oxide surge arrester with silicone rubber connector housing. incoming over voltage waves and voltage increase by reflection are limited. Minimum total length is achieved
by direct link of the surge arrester onto cross- or end adapter.
✓
✓
✓
✓
extremely short installation depth
quick and easy assembly
integrated stress control system
capacitive measuring point
csa 24-5
csa
10
continuous operating voltage uc
24 kV
24 kV
rated voltage ur
30 kV
30 kV
nominal discharge current in
5 ka
10 ka
partial discharge at 24 kV
< 5 pc
< 5 pc
24-
residual voltage at:
Scope of delivery
✓
✓
✓
✓
✓
technical data
3 surge arrester
3 threaded bolts
3 earthing strands
1 assembly instructions
accessories
-
steep current impulse
5/10 ka, 1/20 µs
88,6 kV
85,6 kV
-
long duration current impulse
100 a, 30/60 µs
63,7 kV
60,2 kV
-
lightning current impulse
5/10 ka, 8/20 µs
80,0 kV
80,0 kV
350 mm
320 mm
dimension L
type
reference no. (1 set)
csa 24-5
26 357 92
csa 24-10
26 357 93
Further alternatives concerning continuous operating voltage
Uc and nominal discharge current In upon request.
L *
~245
Coupling connector
CC 24/36-630 for connection
of cables onto busbar systems
cc 24/36-630 are a screened coupling connector made of silicone
rubber for connection onto busbar systems. it is linked directly
onto cross- or end adapter.
✓
✓
✓
✓
✓
✓
short installation depth
quick and easy assembly
screening by outer conductive layer
integrated stress control system
only 2 versions cover 25 up to 300 mm²
use of various cable lug types:
· mechanical (screw type)
· hexagonal pressing
· deep indent pressing
✓ cable sheath testing without dismantling of connector
✓ capacitive measuring point
~245
Scope of delivery
✓
✓
✓
✓
✓
✓
✓
3 coupling connectors
3 stress cone
3 conductor cable lugs (optional)
3 earthing cable lugs
3 earthing strands
1 assembly instructions
accessories
CC 36-630*2 for connection of 12/20(24) kV
cables onto busbar systems
conductor cross
section (mm²)
size of
stress cone
stretch range over
insulation
(mm)
reference no.
(M16 *2)
CC 24-630*1 for connection of 12/20(24) kV
cables onto busbar systems
conductor cross
section (mm²)
size of
stress cone
basic set without
cable lug
stretch range over
insulation
(mm)
reference no.
(M12*1)
basic set without
cable lug
25 - 70
5003
17,0 - 24,3
26 332 94
25 - 95
type 02
12,7 - 25,0
26 353 87
95 - 240
5005
21,2 - 33,5
26 332 95
95 - 300
type 03
21,2 - 34,6
26 353 88
300
5027
28,9 - 40,0
26 332 96
CC 36-630 for connection of 18/30(36) kV
cables onto busbar systems
conductor
size of stretch range over reference no. reference no.
cross section stress cone
(M16 *2)
insulation
(M12*1)
(mm²)
(mm)
basic set without cable lug
25 - 35
5003
17,0 - 24,3
26 332 97
26 332 94
50 - 150
5005
21,2 - 33,5
26 332 98
26 332 95
150 - 300
5027
28,9 - 40,0
26 332 99
26 332 96
*1 matching to adapter 26 129 52 / 53 /70 / 71 / 72 / 73
*2 matching to adapter 26 129 88 / 89
9
Coupling pieces
the cross- or end adapter can be coupled by the coupling pieces
Ko 630 and Ko 1250 to raise the current per phase significant.
type
Max. current
reference no. (1 set)
Ko 630 set*1
630 a
31 700 82
Ko 1250 set*1
1250 a
31 700 88
*1 matching to adapter 26 129 52 / 53 /70 / 71 / 72 / 73
215
~440
*2 matching to adapter 26 129 88 / 89
127
Voltage transformer adapter
Voltage transformer adapter type aVt for connection of voltage
transformers with connection type b or c onto end- or cross
adapter.
~272
type
aVt 36-630 M12*
connection type reference no. (1 set)
1
c
26 129 42
aVt 36-400 M16*2
b
26 129 39
aVt 36-400 M12*1
b
26 129 40
*1 matching to adapter 26 129 52 / 53 /70 / 71 / 72 / 73
*2 matching to adapter 26 129 88 / 89
Busbar end for busbar
systems up to 1250 A
With the screened busbar end an extensible termination of the
switchgearfield is realisable. further high-voltage tests at the
switchgear are possible.
type
reference no. (1 piece)
busbar end L = 195 mm*1
26 132 97
busbar end L = 276 mm*1
26 132 99
busbar *2
31 459 93
*1 matching to adapter 26 129 52 / 53 /70 / 71 / 72 / 73
*2 matching to adapter 26 129 88 / 89
Ø~32
L
Special products of silicone
examples
create new ideas with the material of the future! silicone is the
ideal material, if it concerns electrical and non electric applications. on this page you can find some examples, which special
requirements can be realized with us.
· components with ingrained metal devices
· ingrained stress control elements from conductive silicone
· one piece constructions with indentation
· mouldings with up to 6 litre filling volume
· different colours
· complex structures
· conductive coating
optional your construction unit also can be packed with accessories (assembly instructions, small material etc.) and ready for
dispatch.
11
nkt industrial products - edition 1. 9. 2009
subject to alterations
printed in Germany / www.ostedruck.de
technische Änderungen vorbehalten
nkt cables GmbH
Cable Accessories
Helgoländer Damm 75
D-26954 Nordenham
Phone: +49 (0) 47 31 / 364 - 436
Fax:
+49 (0) 47 31 / 364 - 364
E-Mail: info.nordenham@nktcables.com
Internet: www.nktcables-acc.com
Completing the picture