Flexible Seperators / Air
Cell
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| Product
Features |
 |
The
Flexible Separator (Air
Cell) is fitted inside
the conservators of oil
cooled power Transformers. |
|
It
compensates transformer
oil volume displacement
due to temperature variation
while in operation |
|
Protect
against water vapour |
|
Suppress
gas bubble formation in
the transformer oil. |
|
It
provides permanent, flexible
and non-porous barrier
between the transformer
oil and air. |
|
| Construction
|
|
The
Flexible Separator is
an air bag made of strong,
flexible rubber
coated fabric that provides
resistance to heat, punctures
and fatigue. |
|
Its
outer coating has good
oil resistance, while
the inner coating has
good ozone and weather
resistance. |
|
The
adapter of the flexible
separator is made of structural
steel
(Fe-410-S) and is zinc
plated and passivated. |
|
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| Dimensions
and Sizes |
The dimensions of the Flexible separators
are determined to the size of the conservators.
|
|
SL.NO |
PRODUCT
TYPE |
CONSERVATOR
SIZE |
FLEXIBLE
SEPERATOR SIZE |
|
Dia |
Length |
Width
-W(mm) |
Length
L(mm) |
Loop
Distance G(mm) |
| 1 |
STP
500-500 |
500 |
2710 |
825 |
3035 |
2010 |
| 2 |
STP
500-600 |
600 |
1970 |
982 |
2352 |
1170 |
| 3 |
STP
750-600 |
600 |
2850 |
982 |
3232 |
2050 |
| 4 |
STP
750-700 |
700 |
2180 |
1140 |
2620 |
1480 |
| 5 |
STP
1000-700 |
700 |
2830 |
1140 |
3270 |
1930 |
| 6 |
STP
1000-800 |
800 |
2167 |
1290 |
2657 |
1167 |
| 7 |
STP
1000-800 |
800 |
2260 |
1297 |
2757 |
1260 |
| 8 |
STP
1500-800 |
800 |
3250 |
1297 |
3747 |
2250 |
| 9 |
STP
1500-900 |
900 |
2660 |
1454 |
3214 |
1560 |
| 10 |
STP
2000-900 |
900 |
3440 |
1454 |
3994 |
2340 |
| 11 |
STP
2000-1000 |
1000 |
2400 |
1610 |
3010 |
1200 |
| 12 |
STP
2000-1000 |
1000 |
2990 |
1610 |
3600 |
1790 |
| 13 |
STP
2500-1000 |
1000 |
3300 |
1610 |
3910 |
2100 |
| 14 |
STP
2500-1000 |
1000 |
3400 |
1610 |
4010 |
2200 |
| 15 |
STP
3000-1000 |
1000 |
3540 |
1610 |
4150 |
2340 |
| 16 |
STP
2000-1000 |
1000 |
3800 |
1610 |
4410 |
2600 |
| 17 |
STP
2000-1000 |
1000 |
2880 |
1611 |
3491 |
1680 |
| 18 |
STP
2500-1000 |
1000 |
3520 |
1611 |
4131 |
2320 |
| 19 |
STP
3500-1000 |
1000 |
4740 |
1611 |
5351 |
3540 |
| 20 |
STP
2500-1100 |
1100 |
3000 |
1768 |
3668 |
1700 |
| 21 |
STP
3000-1100 |
1100 |
3520 |
1768 |
4188 |
2220 |
| 22 |
STP
3000-1200 |
1200 |
3050 |
1925 |
3775 |
1650 |
| 23 |
STP
4000-1200 |
1200 |
3940 |
1925 |
4665 |
2540 |
| 24 |
STP
3500-1300 |
1300 |
2800 |
2082 |
3582 |
1300 |
| 25 |
STP
4000-1300 |
1300 |
3450 |
2082 |
4232 |
1950 |
| 26 |
STP
4500-1300 |
1300 |
3600 |
2082 |
4382 |
2100 |
| 27 |
STP
5000-1300 |
1300 |
4000 |
2082 |
4782 |
2500 |
| 28 |
STP
5000-1300 |
1300 |
4200 |
2082 |
4982 |
2700 |
| 29 |
STP
6000-1300 |
1300 |
4770 |
2082 |
5552 |
3270 |
| 30 |
STP
8000-1300 |
1300 |
6520 |
2082 |
7302 |
5020 |
| 31 |
STP
3000-1300 |
1300 |
2512 |
2100 |
3300 |
1000 |
| 32 |
STP
5000-1400 |
1400 |
3710 |
2239 |
4549 |
2110 |
| 33 |
STP
6000-1400 |
1400 |
4360 |
2239 |
5199 |
2760 |
| 34 |
STP
6000-1400 |
1400 |
5000 |
2240 |
5840 |
3400 |
| 35 |
STP
6000-1500 |
1500 |
3900 |
2396 |
4796 |
2200 |
|
| |
Separator
Size
a) Width (W) : II/2 x conservator Dia +40
mm
b) Length (L) : Conservator Length-Conservator
Dia + width of air cell
c) Loop Dist (G) : Conservtor length-conservator
Dia-200mm |
| |
| Flexible
separators of any size can be manufactured
as per customer requirements. |
| |
Material
|
Oil
side coating |
|
Nitrile |
|
Air
side under coating |
|
Neoprene |
|
Air
side top coating |
|
Hypalon |
|
Polyamide
fabric
|
|
Nylon |
|
Adapter
and bolts |
|
Structural
Steel (Fe-410-S),
zinc plated and passivated
|
|
| |
| Properties
of coating material |
| |
Oil
side Coating |
Air
side (under) Coating |
Air
side (top) Coating |
| Polymer |
Acrylonitrile Butadiene Rubber (NBR) |
Poly-Chloroprene (CR) |
Chloro-Sulphonated Polyethylene (CSM) |
| Colour |
Black |
Black |
Olive green |
| Specific Gravity |
1.33 |
1.36 |
1.6 |
| Hardness , Shore A |
65
|
60
|
65
|
| Tensile strength, MPa |
12.6 min. |
13 min. |
8 min. |
| Elongation at break |
250 % min. |
250 % min. |
250 % min. |
| Compression set for 24 hrs at 70° C |
20% max |
25% max |
N.A |
| Corrosion of metal at 170°C for 168 hrs.
|
No corrosion. |
No corrosion. |
N.A |
| Adhesion to polyamide fabric |
45 N/ 25mm width of strip min. |
45 N/ 25mm width of strip, min. |
N.A |
| Resistance to Ozone |
| for
96 hours at 40°C for
Ozone conc. 200±20
pphm. |
N.A
|
N.A |
No crack |
Flexibility at low temperature
at - 10°C |
No
crack or brittleness |
No crack or brittleness |
No crack or brittleness |
| Resistance to heat at 100 °C for 168 hr |
| Change in hardness |
+10 max |
+10 max |
+ 10 Max |
| Change in tensile |
-25 % max |
-25% max |
-25% Max |
| Change in elongation |
-40% max |
-40% max |
-40% max |
| Resistance to transformer oil at 100°C for
168 hrs |
| Change in hardness |
±3 |
N.A |
N.A |
| Change in tensile |
- 15% max |
N.A |
N.A |
| Change in elongation |
-35% max |
N.A |
N.A |
| Change in volume |
+ 10 % max |
N.A |
N.A |
| Change in mass |
+ 3 %max |
N.A |
N.A |
| Ageing inTransformer Oil at 100°C for 30
days |
| Change in hardness |
± 5 max |
N.A |
N.A |
| Change in volume |
+ 12 max |
N.A |
N.A |
| Ageing in Transformer Oil as per BS 5354 |
| Increase in acidity |
0.1mg K0H/gm max |
N.A |
N.A
|
| Increase in sludge contact |
0.05% max |
N.A |
N.A
|
|
|
Properties
of Coated Fabric |
 |
|
 |
| |
| Surface
finish |
:
Clean uniform coating, free
from deep lines,
pits, pinholes, cracks,
paint marks etc.
|
| Thickness
mm |
:
1.25 |
| Weight
gm/m2 |
:
1400 |
| Colour
|
| -
Air side |
:
Olive green |
| -
Oil side |
:
Black |
| Tear
Strength, N |
| -
Warp Dir. |
:
300 min |
| -
Weft Dir. |
:
300 min |
| Breaking
Strength KN/50mm |
| -
Warp Dir. |
:
3.0 min |
| -
Weft Dir. |
:
3.0 min |
| %
Elongation at break |
| -
Warp Direction |
:
25 min |
| -
Weft Direction |
:
30 min |
| Low
temp. bend - 20° C |
:
No crack |
| Bursting
strength Mpa |
:
7.0 min |
| Resistance
to perforation, N. |
:
390 min |
Resistance
to damage by flexing
10 cycles. |
:
No damage |
| Blocking
resistance |
:
No block |
|
|
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|
 |
|
Product
Characteristics |
| Surface
Finish |
Clean
surface and uniform coating,
free from deep lines, pits,
pinholes, cracks, paint
marks, etc. |
| Dimensions
|
As
per specified dimension.
|
| Inflating/deflation
test at 1.5 psi pressure
for 10 cycles |
No
damage |
| Inflation
test at 1.5 psi for 24 hrs
|
No
leakage / seepage of air
|
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