Bushings for metal clad installations
SF6 / Oil
Type SOT
123 kV to 550 kV
Up to 2500 A
According IEC 1639-1996 & IEC 60137-2008
Bushingsfor
for transformer
transformer to
Bushings
to gas
gas insulated
insulatedswitchgear
switchgearconnections
connections
Trench OIP technology for
Trench OIP technology for
Oil / SF6 bushings
Oil / SF6 bushings
Application:
Application:
Bushing Type SOT
Bushing Type SOT
SF6
SF6
This type of bushing, suitable for direct connection between metal
clad
switchgear
enables
the metal
This SF6-insulated
type of bushing,
suitableand
for transformers,
direct connection
between
integrating
of powerswitchgear
transformers
to transformers,
the grounded enclosure
clad SF6-insulated
and
enables the
system
of the
integrating
of switchgear.
power transformers to the grounded enclosure
system
of
the
switchgear.
It is no longer required
to join the transformers to the switchgear
by
of overhead
or cables,
thus savingtooutdoor
It ismeans
no longer
requiredlines
to join
the transformers
the switchgear
bushing
orof
cable
end boxes
switchgear
and transformer
by means
overhead
lineson
orboth
cables,
thus saving
outdoor
side.
bushing or cable end boxes on both switchgear and transformer
side.
Features:
Features:
















Transformer
Transformer

Design is in line with latest requirements of IEC 1639 for gas
side connection.
Design is ininline
with latest
requirements
ofthan
IEC 1639
for gas
Experience
bushing
manufacture
for more
90 years.
side
connection.
Capacitance fine graded oil-paper insulation with long
Experience in bushing manufacture for more than 90 years.
experience.
Capacitance
fine graded
oil-paper
insulation with long
Computer
optimized
electrical
field distribution.
experience.
Proven
high electrical withstand against transient or impulse
Computer optimized electrical field distribution.
test.
Proven high
withstand
transient
or impulse
Excellent
longelectrical
term stability
due toagainst
extremely
low partial
test.
discharge
and power loss factor.
Excellent
long
term
stability
due
to extremely
low
partial
Oil
immersed
part
and
SF6 part
covered
by epoxy
resin
tube
providing
high
impact
resistance.
discharge and power loss factor.
Tan
δ and PD-values
more
as good
as requested
by
Oil immersed
part and
SF6than
parttwice
covered
by epoxy
resin tube
IEC
60137.
providing high impact resistance.
Possibility
trace SF6more
gas by
means
doing
Tan δ and to
PD-values
than
twiceofas
goodDGA
as requested by
(dissolved
gas
analysis)
IEC 60137.
Long
term easy
storage:
Bushing
100% tight
towards
Possibility
to trace
SF6 gas
by means
of doing
DGAambient
humidity.
(dissolved gas analysis)
Long term easy storage: Bushing 100% tight towards ambient
humidity.
Certified ISO 9001
Certified ISO 9001
Certified ISO 14001
Certified ISO 14001
Page 2 / 12
Page 2 / 12
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40497285_00
Oil/ SF6
/ SF6Bushing
Bushing
Oil
1
2
3
Design
Design
1
SF6 side Shield (on request)
SF6 side Shield (on request)
2
SF6 side Terminal
SF6 side Terminal
Terminal (Al or Cu) for connection is designed
according
1639.
Terminal
(Al standard
or Cu) forIEC
connection
is designed
according standard IEC 1639.
3
SF6 side end
SF6
side
end on the SF6 side is made of an epoxy
The
insulator
tube. on the SF6 side is made of an epoxy
Theresin
insulator
resin tube.
4
4
5
The active
Active
part part is made of oil-impregnated wide band
paper with layers of aluminum foil to control the
The active part is made of oil-impregnated wide band
electrical field radially and axially. Depending on the
paper
withrating,
layersthe
of paper
aluminum
foil are
to control
theon
current
and foil
wounded
electrical
field
radially
and
axially.
Depending
on the
either a central tube or conductor
current rating, the paper and foil are wounded on
either a central tube or conductor
Flange
6
Mounting flange with integrated test tap and oil
Flange
sampling device made of corrosion free aluminum
Mounting
flange with
integrated
test tap seal
and oil
alloy, machined
to ensure
an excellent
sampling
made and
of corrosion
free aluminum
betweendevice
the bushing
the transformer
or metal
cladmachined
SF6 insulated
switchgear.
alloy,
to ensure
an excellent seal
between the bushing and the transformer or metal
clad SF6 insulated switchgear.
Oil sampling device
5
6
Oil sampling device
7
7
8
8
9
9
Active part
10
10
Page 3 / 12
Page 3 / 12
Test tap
Test tap for through life capacitance and
Test tap
tan delta measurement.
Test tap for through life capacitance and
Oil side end
tan delta measurement.
The insulator on the SF6 side is made of an epoxy
Oilresin
sidetube.
end
Oilinsulator
side terminal
The
on the SF6 side is made of an epoxy
resin tube.
Terminal (Al or Cu) for connection
according customer request
OilDimensions
side terminal
Oil side
Terminal
(AlShield
or Cu)(on
forrequest)
connection
Dimensions according customer request
Oil side Shield (on request)
40497285_00
40497285_01
40497285_00
420 243 750
01
02
03
Type SOT
04
06
245 142 505
420 243 695
1250
2500
1250
140 5000
630 1425 1050 1600
265 4000
2500
280 5000
1250
240 4000
680 1550 1175 1600
265 4000
2500
280 5000
750
325
355
170 98
2586 1176 360 1050 ±2 25
650
240 4000
275
Page 4 / 12
130 4000 2012 860 382 770 ±2
-
23
23
25
25
280 5000
25
2586 1176 360 1050 ±2 25
24
23
25
26
99
110 139
40497285_00
24
mm
Page 4 / 12
20 365 640 700 365 640 690
22
2500
265 4000
240 4000
25
21
25 270 400 450 270 535 565
680 1550 1175 1600
1250
23
25 270 400 450 270 535 565
20
280 5000
265 4000
22
20 205 290 335 205 305 335 70
19
2500
20 205 290 335 205 305 335 70
240 4000
20
18
630 1425 1050 1600
1250
20
140 5000
23
23
25
17
2500
L5 L6 L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9
130 4000 2012 860 382 770 ±2
25
1600
22
16
460 1050 850
22
120 4000
1325 575 230 520 ±1
15
1250
Mass Approx.
L3
90 4000
70 4000
90 3150
70 3150
90 3150
CT Space L4
14
1600
1250
1325 575 230 520 ±1
70 3150
Rated current (Ir)
L2
1600
1250
70 4000
mm kg
Maximum phase to earth voltage
13
14
16 17 18 19 20 21
Bushing
Dry 15
Power
frequency voltage
withstand (AC)
Transformer Power frequency voltage
withstand (AC)
Lightning Impulse withstand voltage
(BIL)
Switching Impulse withstand voltage
(SIL)
Highest voltage (Um)
27
28
29
30
90
70
115
90
16
12
24
22
16
L1 Cantilever
L2
L3 test
L5load
L6 (min)
L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 n1 t1
mm
N
-
120 4000
L1
13
20 365 640 700 365 640 690
420 243 750
1600
90 4000
12
420 243 695
1600
305
90 3150
1600
1600
N
70 3150
L
1250
1250
1250
11
245 142 505
460 1050 850
90 3150
145 84
1600
-
750
70 3150
550
325
1250
230
650
L
255
275
10
123 71
-
mm kg
A
12
550
A
kV
11
230
09
kV
10
kV
08
kV
09
kV
Standard: 100, 300
08
kV
07
kV
07
355
06
kV kV
05
305
05
Highest voltage (Um)
255
Maximum phase to earth voltage
170 98
Bushing Dry Power frequency voltage
withstand (AC)
Transformer Power frequency voltage
withstand (AC)
Lightning Impulse withstand voltage
(BIL)
Switching Impulse withstand voltage
(SIL)
145 84
Rated current (Ir)
123 71
kV
04
CT Space L4
kV kV
03
Mass Approx.
02
Cantilever test load (min)
01
Standard: 100, 300
Type SOT
25
40497285_01
40497285_00
26
27
99
70
110 139
90
32
16
8
20
16
n2 t2
31
34
35
36
4
M12
4
M10
M12
n3 m3 n4 m4
33
08: Other extension current transformer on request
03
04
05
06
Page 5 / 12
21
22
23
24
25
26
27
28
29
30
2586 1176 360 1050 ±2 25
25
20
mm
365 640 700 365 640 690 110 139
16
25
17
25
18
20
19
20
21
L5 L6 L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9
365 640 700 365 640 690 110 139
11,12: L1 depends on L4. The values in the table are valid for L4= 100mm. If L4>100mm add L4 to L1 and L.
25
Cantilever test load (min)
22
23
mm
24
40497285_00
90
115
16
24
L5 L6 L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 n1 t1
Mass Approx.
L3
CT Space L4
L3
15
Page 5 / 12
20
14
08: Other extension current transformer on request
280 5000
265 4000
240 4000
265 4000
280 5000
265 4000
240 4000
L2
2500
280 5000
2586 1176 360 1050 ±2 25
240 4000
19
Rated current (Ir)
L2
N
1675 1175 1600
240 4000
N
280 5000
L1
13
Comments related to columns :
03: Bushings test voltage at 50Hz 60 sec.
680
550 318 750
265 4000
mm kg
L1
18
Transformer Power frequency voltage
withstand (AC)
Lightning Impulse withstand voltage
(BIL)
Switching Impulse withstand voltage
(SIL)
17
Bushing Dry Power frequency voltage
13withstand
14
15 16
(AC)
L
12
1250
2500
11
2500
1675 1175 1600
Standard: 100, 300
1250
10
1550 1175 1600
2500
L
12
1250
1250
11
1550 1175 1600
A
10
mm kg
kV
09
A
680
Highest voltage (Um)
Maximum phase to earth voltage
09
550 318 750
Maximum phase to earth voltage
Highest voltage (Um)
08
kV
08
680
kV
07
kV
07
680
06
kV kV
02
11,12: L1 depends on L4. The values in the table are valid for L4= 100mm. If L4>100mm add L4 to L1 and L.
01
Comments related to columns :
03: Bushings test voltage at 50Hz 60 sec.
Bushing Dry Power frequency voltage
withstand (AC)
Transformer Power frequency voltage
withstand (AC)
Lightning Impulse withstand voltage
(BIL)
Switching Impulse withstand voltage
(SIL)
550 318 750
Rated current (Ir)
550 318 750
kV
05
CT Space L4
kV
04
Standard: 100, 300
kV kV
03
Mass Approx.
02
Cantilever test load (min)
01
25
26
40497285_01
40497285_00
27
90
32
16
20
n2 t2
31
34
35
36
4
M12
4
M10
n3 m3 n4 m4
33
Dimensional Drawing
Dimensional
Drawing
L3
L3
SF6-Side
SF6-Side
øD4
L
L1
L1
øD1
L4
øD1
L4
L5
L5
L
L2
L2
L6 L6
øD4
Oil-Side
Oil-Side
Page 6 / 12
Page 6 / 12
40497285_00
40497285_01
40497285_00
Dimensional
Drawing
Dimensional
Drawing
SF6 side
SF6 side
Ø D6
Ø D6
Ø D5
Ø D5
0
n3 x M 3
n3 x M 3
Ø D8 0-0.5
Ø D8 -0.5
Ø D7 ± 0.3
Ø D7 ± 0.3
L7
L7
n2 x ø t2
n2 x ø t2
Oil side
Oil side
Ø D3
Ø D2
Ø D3
Ø D2
L8
n1 x ø t1
n1 x ø t1
n4 x M 4
n4 x M 4
Ø D9
Ø D10
Ø D9
L8
Ø D10
Page 7 / 12
Page 7 / 12
40497285_00
40497285_00
40497285_01
Standard
G1/4 Air Outlet
Standard
G1/4 Air Outlet
Flat gasket
Flat gasket
6
6
Test tap (2kV)
Test tap (2kV)
Multiple spring contact
22
Multiple spring contact
O-ring gasket
O-ring gasket
22
Oil sampling device
Oil sampling device
Valve
Valve
Page 8 / 12
Page 8 / 12
40497285_00
40497285_01
40497285_00
On
On request
request
Pressure control
Pressure control
This system
This system
permit to control
permit to control
the pressure
the pressure
inside of the
inside of the
bushing
bushing
Stress shield
Stress shield
Stress shields are also available
Stress shields are also available
with bayonet fixing system and
with bayonet fixing system and
screwed fixing system
screwed fixing system
If you need any Oil / SF6 bushing proven
If you need any Oil / SF6 bushing proven
in operation conditions around the world,
in operation conditions around the world,
Trench has it!
Trench has it!
Page 9 / 12
Page 9 / 12
40497285_00
40497285_01
40497285_00
Technical
Technicaldata
datarequest
request
  Mark the requested value…
  Mark the requested value…
Um
Um
123kV
123kV
145kV
145kV
170kV
170kV
245kV
245kV
420kV
420kV
550kV
550kV
Other
Other














………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
Up Transformer
230kV

Up Transformer
230kV

275kV

275kV

325kV

325kV

460kV

460kV

630kV

630kV

680kV

680kV

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
BIL
550kV

BIL
550kV

650kV

650kV

750kV

750kV

1050kV

1050kV

1425kV

1425kV

1550kV

1550kV

1675kV

1675kV

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
Rated Current
1250A

Rated Current
1250A

1600A

1600A

2500A

2500A

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
CT Space
100mm

CT Space
100mm

300mm

300mm

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
Terminals Material
Aluminum

Terminals Material
Aluminum

Copper

Copper

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
Maximum Oil Temperature
70°

Maximum Oil Temperature
70°

80°

80°

90°

90°

100°

100°

Other

Other

………………………………………………………………………………………………………………………………………………...
………………………………………………………………………………………………………………………………………………...
Bus Duct Temperature
60°

Bus Duct Temperature
60°

70°

70°

80°

80°

Other

Other

Page 10 / 12
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40497285_00
Notes:
…………………………………………………………………………………………………………………………………
Notes:
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Page 11 / 12
Page 11 / 12
40497285_00
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40497285_00
Product Range
Quality
Bushings for
At Trench quality is a way of life.
Trench quality assurance
complies with the most stringent
standards of ISO 9001 and ISO 14001.
• Power Transformers
up to 550 kV, 5000A
• High Current Application
up to 52 kV, 40kA
Certified by AFAQ since 1994
• Transformer to SF6
connection up to 550kV
• Gas-insulated Switchgear
(GIS) up to 800 kV, 6000A
• Generators
up to 36 kV, 50kA
• Railways
• Buildings , Wall
up to 245 kV, 5000A
• Bushings according
Standard IEC 60137
• Bushings according to
customer’s special specification
Trench® France SAS
16, rue du Général Cassagnou
B.P. 80070
F-68302 Saint-Louis Cedex France
Phone : +33 3 89 70 23 23
Fax :
+33 3 89 70 23 59
imprimerie de saint-louis troendlé bieler
40497285_01
www.trenchgroup.com
Sales-bushing.fr@trench-group.com
All rights reserved.
Brands and trademarks used in this document
are the property of Trench®
Subject to change without prior notice.
The information in this document contains general
descriptions of the technical options which are not
necessarily available in every single case. The required
features must therefore be defined in each individual case
when concluding the contract.