Options and accessories
Main features of EDS/EDC range
?
Roots vacuum blower, 1.
?
Auxiliary oil pump.
?
Transmitter for moisture content in oil (ppm), 2.
?
Double oil filter.
?
Dielectric strength tester, 3.
?
Auxiliary autotransformer.
?
Henrymetrer to measure the residual gas content, 4.
?
3 or 1 microns additional cartridge filters.
?
Outdoor version: canvas or metal cover, 5 and 7.
?
Mobile version: light tow or trailer.
?
Water cooler circuit, 6:
?
Electronic multichannel recorder.
Our plants perform three main functions:
Filtration
The presence of solid impurities reduces the oil's
dielectric strength and clogs the equipment
components. In our machines are two different
systems to achieve the manufacturer's
requirements: the mesh filter removes larger
impurities and then, thanks to special filters for
insulating oil, 1, 3 and 5 microns levels are
reached.
In order not to interrupt the process if it is
necessary to change the cartridge, it is possible
to install two filters in parallel. In addition, this
configuration allows to operate with two
filtration levels according to oil's condition.
Heating
Due to the fact that water's dissolution in
insulating oil depends on the temperature, it is
important to have oil as hot as possible so that it
can absorb the maximum amount of water
placed inside the cardboard and paper.
With electric heaters and control loop, the
heater can increase oil temperature 30°C every
cycle. The electrical resistors have a large
surface, so that heat transfer is limited to
2W/cm2.
Security against overheating the oil is ensured by
four separate devices that control different
variables such as: temperature, pressure and
flow. It is important no to exceed 80°C, which is
the maximum temperature recommended by
the main insulating oil producers.
- Cooling jacket for column.
?
Oil and vacuum hoses kit.
- Cooler for electric cabinet.
?
Recommended spare parts.
- Steam condenser.
?
Cooler for electric cabinet for tropical climates.
Auxiliary vacuum pump (external o incorporated).
?
?
Pirani type electronic vacuum gauge.
Double stage column.
?
?
Air dryer system.
1.
2.
3.
4.
Degassing Column
The column does the most important process:
the degassing under vacuum. To ensure the
succeed of process, it incorporates a distributor
and a random packing that ensures an optimal
spread having the largest area exposed to
vacuum.
5.
6.
7.
Once oil leaves the packing section, it is
collected at the bottom of the column to return
back to the transformer thanks to the oil pump.
The column features an illuminated observation
glass, a control system for liquid level and a
control system of foam. Optionally, you can
incorporate a Henrymeter.
Treated oil characteristics
The obtainable oil quality coming out of a Telstar unit is as follows:1
Water content
Gas content
Vacuum inside column
After one cycle
< 10 ppm
< 0,5%
< 10 mbar
After three cycles
< 5 ppm
< 0,2%
< 0,8 mbar
Josep Tapiolas, 120
08226 Terrassa (Spain)
T. +34 937 361 600
F. +34 937 859 342
In event of adding a roots pump, the obtainable oil quality will be:
Water content
Gas content
Vacuum inside column
After one cycle
< 5 ppm
< 0,2%
< 2 mbar
1. Provided that oil does not exceed 50 ppm and 12% gas content at entry.
After three cycles
< 3 ppm
< 0,1%
< 0,8 mbar
www.telstar-vacuum.com
ISO 9001: Certified Company
BR-EDS-EDC-EN-0409
Telstar reserves the right to improvements and specification changes without notice.
EDS - EDC
Vacuum Insulating
Oil Treatment Plants
EDS - EDC
Diagrams
Design features
Vacuum Insulating Oil Treatment Plants
For more than 30 years, TELSTAR has manufactured and distributed vacuum insulating oil treatment plants all over the
world. Our range EDS/EDC, remove the moisture, dissolved gas and solid particles to provide the best insulating
properties.
Thanks to the experience gained over 200 projects and the continuous R & D process, TELSTAR degassers offer innovative
solutions and advanced technology to ensure the highest quality and to fulfill customer satisfaction.
The insulating oil
In electrical transformers, the three main components
sensitive to deterioration and pollution are:
%
11
The cellulose paper: used for insulating the conductors.
?
The insulating oil: used as coolant and insulating fluid in
?
electrical transformers.
Between these three components, the insulating oil is more
accessible for taking samples and, with it, you can obtain
valuable information about the operation conditions of the
transformer. Insulating oil must ensure the following
properties:
High dielectric strength.
?
10
Water content in the paper
The cardboard form: used for main support and insulating
?
the winding.
30°C
20°C
40°C
9
50°C
8
Good heat distribution through the proper viscosity.
?
There are several factors contributing to deterioration of
insulating oil, such as moisture, overload, overheating and
the lack of maintenance.
4
2
TIC
Electric cabinet: The
LCD touchscreen
make it easy to
operate with the
machine:
temperature, oil
pressure, vacuum,
foam level... All
could be monitored
from the LCD.
13
FS
PIC
3
PS
6
Oil trap: the internal
design prevents vacuum
pump sucking oil drops
and the level alarm alerts
when it must be drained.
22
V5
20
15
16
60°C
17
7
25
12
18
23
PS
19
28
V4
5
80°C
EDC plants
3
2
TS
V2
24
4
14
V1 5 27
21
7
6
TIC
11
100°C
21
1
0
10
20
30
40
50
60
70
80
90
Oil filter: The two manometers
before and after the filters
indicates when should be
replaced. In addition, with the
double option filter it is
possible to replace them during
operation.
ppm
Water content in the oil
It is very important to heat the dielectric oil to increase the
water content capacity. If the oil temperature is too low, it is
far more difficult to extract the moisture inside the
cardboard and the paper. Because of this, our EDC plants
incorporate an additional feature that only heats and filters
the oil in a higher flow than the treatment capacity.
TELSTAR's plants offer the following advantages:
Suitable designed to transport by forklift.
?
Ability to be carried inside a van thanks to the
?
position of the items and the reduced measures
(version EDS / C4).
Double inlet and outlet ends.
?
Quick couplings KAMLOK® type.
?
LCD touch screen to control the whole plant .
?
Two operating modes:
?
- Automatic: the computer adapts the oil flow and
vacuum depending on the properties of the oil.
- Manual: where the user can adjust the parameters
at will.
9
Double inlet and outlet ends: To fill with new oil from a
tank/barrel or to drain it without unplugging the existing
hoses. Just plug the new ones in the second port and
regulate it with the valves. Furthermore, the quick link
KAMLOK® type oversimplifies the operation.
TIC
8
4 V1 5 27
1
FS
2
TIC
PS
6
TS
7
3
V4
Oil pump: the low NPSH and
the positive suction head
guarantees an optimal prime of
the pump and no cavitation.
News of the Vacuum
Treatment Equipment
The foaming effect: When the oil temperature is too low, the
vacuum pressure too high or the distribution pattern inside
the column is not the appropriate, foam begins to raise and
can damage the vacuum pump. Our equipment has the AFP®
(Anti-Foaming Protocol) to eliminate the foam during the
degasification under vacuum.
9 10
8
1
Excellent chemical stability.
?
Low electric losses due to the low value of its tangent
?
delta.
EDS plants
Vacuum pump: reliable design with big oil
carter. The anti suck back valve prevents oil
pump from being sucked into the system
when it switches off.
26
11 14
10
13
16
15
17
PIC
V2
22
12
V5
20
PS
18
23
25
Technical data
Type
Treatment capacity
Capacity during transformer heating process
Maximum oil temperature rise at rated capacity
Vacuum pump capacity
Heating power
Total input power
Quantity of oil filter cartridges
Column dimensions
Inlet/Outlet pipes dimensions
Total weight
Dimensions
Units
m3 /h
m3 /h
°C
m3 /h
kW
kVA
EDS 2
EDS 4
EDC 4
EDC 7
EDC 10
2
4
4
7
10
----7
11
18
30
30
30
30
30
35
70
70
200
300
32
70
110
170
260
35
75
115
180
275
3
3
6
6
12
mm
L=1200 Ø=500 L=1200 Ø=500 L=1200 Ø=500 L=1400 Ø=600 L=1600 Ø=700
DN 32
DN 32
DN 40
DN 50
DN 65
kg
700
1100
1200
2000
3000
Lenght (mm)
2200
2200
2200
2600
3500
Widht (mm)
1250
1250
1250
1500
2000
Height (mm)
1600
1600
1600
1800
2000
1. Oil inlet valve
2. Temperature indicator
3. Mesh filter
4. Manometer
5. Flow switch
6. Heat exchanger
7. Safety thermostat
8. Safety valve
9. Temperature regulator/indicator
10. Oil isolation electrovalve
11. Flow rate regulating valve
12. Degassing column
V6
19
24
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Pressure indicator control
Airing valve with filter
Vacuum isolation electrovalve
Oil trap
Vacuum gauges
Vacuum pump
Oil outlet pump
Check valve
Oil filter
Oil outlet valve
Max. oil and foam level alarm
Sampling valve
V3
28
25.
26.
27.
28.
Vacuum pump safety valve
Oil inlet pump
Pressure switch
Electric cabinet
Options and Accesories
V1. Transmiter for moisture content
V2. Henrymeter
V3. Roots vacuum blower
V4. Double oil filter
V5. Flow-through meter
V6. Auxiliary vacuum pump
Options and accessories
Main features of EDS/EDC range
?
Roots vacuum blower, 1.
?
Auxiliary oil pump.
?
Transmitter for moisture content in oil (ppm), 2.
?
Double oil filter.
?
Dielectric strength tester, 3.
?
Auxiliary autotransformer.
?
Henrymetrer to measure the residual gas content, 4.
?
3 or 1 microns additional cartridge filters.
?
Outdoor version: canvas or metal cover, 5 and 7.
?
Mobile version: light tow or trailer.
?
Water cooler circuit, 6:
?
Electronic multichannel recorder.
Our plants perform three main functions:
Filtration
The presence of solid impurities reduces the oil's
dielectric strength and clogs the equipment
components. In our machines are two different
systems to achieve the manufacturer's
requirements: the mesh filter removes larger
impurities and then, thanks to special filters for
insulating oil, 1, 3 and 5 microns levels are
reached.
In order not to interrupt the process if it is
necessary to change the cartridge, it is possible
to install two filters in parallel. In addition, this
configuration allows to operate with two
filtration levels according to oil's condition.
Heating
Due to the fact that water's dissolution in
insulating oil depends on the temperature, it is
important to have oil as hot as possible so that it
can absorb the maximum amount of water
placed inside the cardboard and paper.
With electric heaters and control loop, the
heater can increase oil temperature 30°C every
cycle. The electrical resistors have a large
surface, so that heat transfer is limited to
2W/cm2.
Security against overheating the oil is ensured by
four separate devices that control different
variables such as: temperature, pressure and
flow. It is important no to exceed 80°C, which is
the maximum temperature recommended by
the main insulating oil producers.
- Cooling jacket for column.
?
Oil and vacuum hoses kit.
- Cooler for electric cabinet.
?
Recommended spare parts.
- Steam condenser.
?
Cooler for electric cabinet for tropical climates.
Auxiliary vacuum pump (external o incorporated).
?
?
Pirani type electronic vacuum gauge.
Double stage column.
?
?
Air dryer system.
1.
2.
3.
4.
Degassing Column
The column does the most important process:
the degassing under vacuum. To ensure the
succeed of process, it incorporates a distributor
and a random packing that ensures an optimal
spread having the largest area exposed to
vacuum.
5.
6.
7.
Once oil leaves the packing section, it is
collected at the bottom of the column to return
back to the transformer thanks to the oil pump.
The column features an illuminated observation
glass, a control system for liquid level and a
control system of foam. Optionally, you can
incorporate a Henrymeter.
Treated oil characteristics
The obtainable oil quality coming out of a Telstar unit is as follows:1
Water content
Gas content
Vacuum inside column
After one cycle
< 10 ppm
< 0,5%
< 10 mbar
After three cycles
< 5 ppm
< 0,2%
< 0,8 mbar
Josep Tapiolas, 120
08226 Terrassa (Spain)
T. +34 937 361 600
F. +34 937 859 342
In event of adding a roots pump, the obtainable oil quality will be:
Water content
Gas content
Vacuum inside column
After one cycle
< 5 ppm
< 0,2%
< 2 mbar
1. Provided that oil does not exceed 50 ppm and 12% gas content at entry.
After three cycles
< 3 ppm
< 0,1%
< 0,8 mbar
www.telstar-vacuum.com
ISO 9001: Certified Company
BR-EDS-EDC-EN-0409
Telstar reserves the right to improvements and specification changes without notice.
EDS - EDC
Vacuum Insulating
Oil Treatment Plants
EDS - EDC
Diagrams
Design features
Vacuum Insulating Oil Treatment Plants
For more than 30 years, TELSTAR has manufactured and distributed vacuum insulating oil treatment plants all over the
world. Our range EDS/EDC, remove the moisture, dissolved gas and solid particles to provide the best insulating
properties.
Thanks to the experience gained over 200 projects and the continuous R & D process, TELSTAR degassers offer innovative
solutions and advanced technology to ensure the highest quality and to fulfill customer satisfaction.
The insulating oil
In electrical transformers, the three main components
sensitive to deterioration and pollution are:
%
11
The cellulose paper: used for insulating the conductors.
?
The insulating oil: used as coolant and insulating fluid in
?
electrical transformers.
Between these three components, the insulating oil is more
accessible for taking samples and, with it, you can obtain
valuable information about the operation conditions of the
transformer. Insulating oil must ensure the following
properties:
High dielectric strength.
?
10
Water content in the paper
The cardboard form: used for main support and insulating
?
the winding.
30°C
20°C
40°C
9
50°C
8
Good heat distribution through the proper viscosity.
?
There are several factors contributing to deterioration of
insulating oil, such as moisture, overload, overheating and
the lack of maintenance.
4
2
TIC
Electric cabinet: The
LCD touchscreen
make it easy to
operate with the
machine:
temperature, oil
pressure, vacuum,
foam level... All
could be monitored
from the LCD.
13
FS
PIC
3
PS
6
Oil trap: the internal
design prevents vacuum
pump sucking oil drops
and the level alarm alerts
when it must be drained.
22
V5
20
15
16
60°C
17
7
25
12
18
23
PS
19
28
V4
5
80°C
EDC plants
3
2
TS
V2
24
4
14
V1 5 27
21
7
6
TIC
11
100°C
21
1
0
10
20
30
40
50
60
70
80
90
Oil filter: The two manometers
before and after the filters
indicates when should be
replaced. In addition, with the
double option filter it is
possible to replace them during
operation.
ppm
Water content in the oil
It is very important to heat the dielectric oil to increase the
water content capacity. If the oil temperature is too low, it is
far more difficult to extract the moisture inside the
cardboard and the paper. Because of this, our EDC plants
incorporate an additional feature that only heats and filters
the oil in a higher flow than the treatment capacity.
TELSTAR's plants offer the following advantages:
Suitable designed to transport by forklift.
?
Ability to be carried inside a van thanks to the
?
position of the items and the reduced measures
(version EDS / C4).
Double inlet and outlet ends.
?
Quick couplings KAMLOK® type.
?
LCD touch screen to control the whole plant .
?
Two operating modes:
?
- Automatic: the computer adapts the oil flow and
vacuum depending on the properties of the oil.
- Manual: where the user can adjust the parameters
at will.
9
Double inlet and outlet ends: To fill with new oil from a
tank/barrel or to drain it without unplugging the existing
hoses. Just plug the new ones in the second port and
regulate it with the valves. Furthermore, the quick link
KAMLOK® type oversimplifies the operation.
TIC
8
4 V1 5 27
1
FS
2
TIC
PS
6
TS
7
3
V4
Oil pump: the low NPSH and
the positive suction head
guarantees an optimal prime of
the pump and no cavitation.
News of the Vacuum
Treatment Equipment
The foaming effect: When the oil temperature is too low, the
vacuum pressure too high or the distribution pattern inside
the column is not the appropriate, foam begins to raise and
can damage the vacuum pump. Our equipment has the AFP®
(Anti-Foaming Protocol) to eliminate the foam during the
degasification under vacuum.
9 10
8
1
Excellent chemical stability.
?
Low electric losses due to the low value of its tangent
?
delta.
EDS plants
Vacuum pump: reliable design with big oil
carter. The anti suck back valve prevents oil
pump from being sucked into the system
when it switches off.
26
11 14
10
13
16
15
17
PIC
V2
22
12
V5
20
PS
18
23
25
Technical data
Type
Treatment capacity
Capacity during transformer heating process
Maximum oil temperature rise at rated capacity
Vacuum pump capacity
Heating power
Total input power
Quantity of oil filter cartridges
Column dimensions
Inlet/Outlet pipes dimensions
Total weight
Dimensions
Units
m3 /h
m3 /h
°C
m3 /h
kW
kVA
EDS 2
EDS 4
EDC 4
EDC 7
EDC 10
2
4
4
7
10
----7
11
18
30
30
30
30
30
35
70
70
200
300
32
70
110
170
260
35
75
115
180
275
3
3
6
6
12
mm
L=1200 Ø=500 L=1200 Ø=500 L=1200 Ø=500 L=1400 Ø=600 L=1600 Ø=700
DN 32
DN 32
DN 40
DN 50
DN 65
kg
700
1100
1200
2000
3000
Lenght (mm)
2200
2200
2200
2600
3500
Widht (mm)
1250
1250
1250
1500
2000
Height (mm)
1600
1600
1600
1800
2000
1. Oil inlet valve
2. Temperature indicator
3. Mesh filter
4. Manometer
5. Flow switch
6. Heat exchanger
7. Safety thermostat
8. Safety valve
9. Temperature regulator/indicator
10. Oil isolation electrovalve
11. Flow rate regulating valve
12. Degassing column
V6
19
24
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Pressure indicator control
Airing valve with filter
Vacuum isolation electrovalve
Oil trap
Vacuum gauges
Vacuum pump
Oil outlet pump
Check valve
Oil filter
Oil outlet valve
Max. oil and foam level alarm
Sampling valve
V3
28
25.
26.
27.
28.
Vacuum pump safety valve
Oil inlet pump
Pressure switch
Electric cabinet
Options and Accesories
V1. Transmiter for moisture content
V2. Henrymeter
V3. Roots vacuum blower
V4. Double oil filter
V5. Flow-through meter
V6. Auxiliary vacuum pump
EDS - EDC
Diagrams
Design features
Vacuum Insulating Oil Treatment Plants
For more than 30 years, TELSTAR has manufactured and distributed vacuum insulating oil treatment plants all over the
world. Our range EDS/EDC, remove the moisture, dissolved gas and solid particles to provide the best insulating
properties.
Thanks to the experience gained over 200 projects and the continuous R & D process, TELSTAR degassers offer innovative
solutions and advanced technology to ensure the highest quality and to fulfill customer satisfaction.
The insulating oil
In electrical transformers, the three main components
sensitive to deterioration and pollution are:
%
11
The cellulose paper: used for insulating the conductors.
?
The insulating oil: used as coolant and insulating fluid in
?
electrical transformers.
Between these three components, the insulating oil is more
accessible for taking samples and, with it, you can obtain
valuable information about the operation conditions of the
transformer. Insulating oil must ensure the following
properties:
High dielectric strength.
?
10
Water content in the paper
The cardboard form: used for main support and insulating
?
the winding.
30°C
20°C
40°C
9
50°C
8
Good heat distribution through the proper viscosity.
?
There are several factors contributing to deterioration of
insulating oil, such as moisture, overload, overheating and
the lack of maintenance.
4
2
TIC
Electric cabinet: The
LCD touchscreen
make it easy to
operate with the
machine:
temperature, oil
pressure, vacuum,
foam level... All
could be monitored
from the LCD.
13
FS
PIC
3
PS
6
Oil trap: the internal
design prevents vacuum
pump sucking oil drops
and the level alarm alerts
when it must be drained.
22
V5
20
15
16
60°C
17
7
25
12
18
23
PS
19
28
V4
5
80°C
EDC plants
3
2
TS
V2
24
4
14
V1 5 27
21
7
6
TIC
11
100°C
21
1
0
10
20
30
40
50
60
70
80
90
Oil filter: The two manometers
before and after the filters
indicates when should be
replaced. In addition, with the
double option filter it is
possible to replace them during
operation.
ppm
Water content in the oil
It is very important to heat the dielectric oil to increase the
water content capacity. If the oil temperature is too low, it is
far more difficult to extract the moisture inside the
cardboard and the paper. Because of this, our EDC plants
incorporate an additional feature that only heats and filters
the oil in a higher flow than the treatment capacity.
TELSTAR's plants offer the following advantages:
Suitable designed to transport by forklift.
?
Ability to be carried inside a van thanks to the
?
position of the items and the reduced measures
(version EDS / C4).
Double inlet and outlet ends.
?
Quick couplings KAMLOK® type.
?
LCD touch screen to control the whole plant .
?
Two operating modes:
?
- Automatic: the computer adapts the oil flow and
vacuum depending on the properties of the oil.
- Manual: where the user can adjust the parameters
at will.
9
Double inlet and outlet ends: To fill with new oil from a
tank/barrel or to drain it without unplugging the existing
hoses. Just plug the new ones in the second port and
regulate it with the valves. Furthermore, the quick link
KAMLOK® type oversimplifies the operation.
TIC
8
4 V1 5 27
1
FS
2
TIC
PS
6
TS
7
3
V4
Oil pump: the low NPSH and
the positive suction head
guarantees an optimal prime of
the pump and no cavitation.
News of the Vacuum
Treatment Equipment
The foaming effect: When the oil temperature is too low, the
vacuum pressure too high or the distribution pattern inside
the column is not the appropriate, foam begins to raise and
can damage the vacuum pump. Our equipment has the AFP®
(Anti-Foaming Protocol) to eliminate the foam during the
degasification under vacuum.
9 10
8
1
Excellent chemical stability.
?
Low electric losses due to the low value of its tangent
?
delta.
EDS plants
Vacuum pump: reliable design with big oil
carter. The anti suck back valve prevents oil
pump from being sucked into the system
when it switches off.
26
11 14
10
13
16
15
17
PIC
V2
22
12
V5
20
PS
18
23
25
Technical data
Type
Treatment capacity
Capacity during transformer heating process
Maximum oil temperature rise at rated capacity
Vacuum pump capacity
Heating power
Total input power
Quantity of oil filter cartridges
Column dimensions
Inlet/Outlet pipes dimensions
Total weight
Dimensions
Units
m3 /h
m3 /h
°C
m3 /h
kW
kVA
EDS 2
EDS 4
EDC 4
EDC 7
EDC 10
2
4
4
7
10
----7
11
18
30
30
30
30
30
35
70
70
200
300
32
70
110
170
260
35
75
115
180
275
3
3
6
6
12
mm
L=1200 Ø=500 L=1200 Ø=500 L=1200 Ø=500 L=1400 Ø=600 L=1600 Ø=700
DN 32
DN 32
DN 40
DN 50
DN 65
kg
700
1100
1200
2000
3000
Lenght (mm)
2200
2200
2200
2600
3500
Widht (mm)
1250
1250
1250
1500
2000
Height (mm)
1600
1600
1600
1800
2000
1. Oil inlet valve
2. Temperature indicator
3. Mesh filter
4. Manometer
5. Flow switch
6. Heat exchanger
7. Safety thermostat
8. Safety valve
9. Temperature regulator/indicator
10. Oil isolation electrovalve
11. Flow rate regulating valve
12. Degassing column
V6
19
24
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Pressure indicator control
Airing valve with filter
Vacuum isolation electrovalve
Oil trap
Vacuum gauges
Vacuum pump
Oil outlet pump
Check valve
Oil filter
Oil outlet valve
Max. oil and foam level alarm
Sampling valve
V3
28
25.
26.
27.
28.
Vacuum pump safety valve
Oil inlet pump
Pressure switch
Electric cabinet
Options and Accesories
V1. Transmiter for moisture content
V2. Henrymeter
V3. Roots vacuum blower
V4. Double oil filter
V5. Flow-through meter
V6. Auxiliary vacuum pump
Options and accessories
Main features of EDS/EDC range
?
Roots vacuum blower, 1.
?
Auxiliary oil pump.
?
Transmitter for moisture content in oil (ppm), 2.
?
Double oil filter.
?
Dielectric strength tester, 3.
?
Auxiliary autotransformer.
?
Henrymetrer to measure the residual gas content, 4.
?
3 or 1 microns additional cartridge filters.
?
Outdoor version: canvas or metal cover, 5 and 7.
?
Mobile version: light tow or trailer.
?
Water cooler circuit, 6:
?
Electronic multichannel recorder.
Our plants perform three main functions:
Filtration
The presence of solid impurities reduces the oil's
dielectric strength and clogs the equipment
components. In our machines are two different
systems to achieve the manufacturer's
requirements: the mesh filter removes larger
impurities and then, thanks to special filters for
insulating oil, 1, 3 and 5 microns levels are
reached.
In order not to interrupt the process if it is
necessary to change the cartridge, it is possible
to install two filters in parallel. In addition, this
configuration allows to operate with two
filtration levels according to oil's condition.
Heating
Due to the fact that water's dissolution in
insulating oil depends on the temperature, it is
important to have oil as hot as possible so that it
can absorb the maximum amount of water
placed inside the cardboard and paper.
With electric heaters and control loop, the
heater can increase oil temperature 30°C every
cycle. The electrical resistors have a large
surface, so that heat transfer is limited to
2W/cm2.
Security against overheating the oil is ensured by
four separate devices that control different
variables such as: temperature, pressure and
flow. It is important no to exceed 80°C, which is
the maximum temperature recommended by
the main insulating oil producers.
- Cooling jacket for column.
?
Oil and vacuum hoses kit.
- Cooler for electric cabinet.
?
Recommended spare parts.
- Steam condenser.
?
Cooler for electric cabinet for tropical climates.
Auxiliary vacuum pump (external o incorporated).
?
?
Pirani type electronic vacuum gauge.
Double stage column.
?
?
Air dryer system.
1.
2.
3.
4.
Degassing Column
The column does the most important process:
the degassing under vacuum. To ensure the
succeed of process, it incorporates a distributor
and a random packing that ensures an optimal
spread having the largest area exposed to
vacuum.
5.
6.
7.
Once oil leaves the packing section, it is
collected at the bottom of the column to return
back to the transformer thanks to the oil pump.
The column features an illuminated observation
glass, a control system for liquid level and a
control system of foam. Optionally, you can
incorporate a Henrymeter.
Treated oil characteristics
The obtainable oil quality coming out of a Telstar unit is as follows:1
Water content
Gas content
Vacuum inside column
After one cycle
< 10 ppm
< 0,5%
< 10 mbar
After three cycles
< 5 ppm
< 0,2%
< 0,8 mbar
Josep Tapiolas, 120
08226 Terrassa (Spain)
T. +34 937 361 600
F. +34 937 859 342
In event of adding a roots pump, the obtainable oil quality will be:
Water content
Gas content
Vacuum inside column
After one cycle
< 5 ppm
< 0,2%
< 2 mbar
1. Provided that oil does not exceed 50 ppm and 12% gas content at entry.
After three cycles
< 3 ppm
< 0,1%
< 0,8 mbar
www.telstar-vacuum.com
ISO 9001: Certified Company
BR-EDS-EDC-EN-0409
Telstar reserves the right to improvements and specification changes without notice.
EDS - EDC
Vacuum Insulating
Oil Treatment Plants