Interested to Buy Any Domain ? << Click Here >> for more details...
What is the technical name of Transformer Oil ?
- 17 Answers
- 39710 Views
- Bhel, Don Bosco, Lanco, I also Faced
- E-Mail Answers
Answer Posted / arvind singh
There is not any technical name for the transformer oil,
its only the specification which made the crude oil to
transformer oil(insulating oil). Nepthanic oil, Peraphenic
oil, Mineral Oil (its the specification which process the
crude oil to the nepthane base for the cooling of
transformer which have various acceptance norms as
specified in IS:335 below
Sl No. Characteristics Requirement Method of test as
per latest revision of IS as indicated below
1. Appearance The oil shall be clear and
transparent and free from suspended matters/sediments A
representative sample of oil shall be examined in a 100 mm
thick layer at the ambient temperature
2. Density at 29.5 Deg. C. Max. 0.89 g/cm3
IS:1448[P:16]
3.
Kinematic Viscosity at 27oC Max. 27 cst
IS:1448[P:25]
4. Interfacial tension at 27oC Min. 0.04 N/m
IS:6104
5. Flash point Pensky Marten (closed),Min.
140oC IS:1448[P:21]
6. Pour point Max. -6 deg. C IS:1448[P:10]
7. Neutralisation value (Total acidity) Max.
0.03 mg KOH/G IS:1448 [P:2]
8. Corrosive Sulphur Non-corrosive IS:335
9. Electric Strength (breakdown voltage)
IS:6792
a) New unfiltered oil, Min. 30 kV (rms)
b) After filtration, Min. 60 kV (rms)
10. Dielectric dissipation factor (Tan delta) at 90ยบ C,
max. 0.002 IS:6262
11. Specific resistance (resistivity)
IS:6103
a) at 90oC min. 150x1012 ohm-cm *
b) at 27oC min. 2500x1012 ohm-cm *
12. Oxidation stability IS:335
a) Neutralisation value after oxidation Max.
0.40 mg KOH/g
b) Total sludge value after oxidation Max.
0.10 percent by weight.
13. Presence of oxidation inhibitor present by weight
The oil shall not contain anti-oxidant additives
IS:13631
14. Water content maximum 50 ppm IS:13567
15. Aging characteristics after accelerated ageing
(open beaker method with copper catalyst)
IS:12177
Method A
a) Specific resistance (resistivity) Min.
IS:6103
1) at 27oC, Min. 4.5x1012 ohm-cm
2) at 90oC, Min. 0.2x1012 ohm-cm
b)Dielectric dissipation factor (Tan delta) at 90oC
Max.
0.20 IS:6262
c) Total acidity, Max. 0.05 mg KOH/gm IS:1448
[P:2]
d) Total sludge, Max. 0.05 percent by weight
Annex A of IS 12177
16. SK value, max. 4-8% volume increase IS : 335
| Is This Answer Correct ? | 40 Yes | 10 No |
Post New Answer View All Answers
What is domestic transformer? Draw the connection of domestic transformer.
we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards
upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.
What is depreciation factor?
Why efficiency in thermal power plant is low?
What are the functions of temperature scanner in power transformer?
What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?
which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?
What are dcs and plc?
what is data block in plc ? How the values of data block are written and read by hmi ? what is the difference between function and function block ?
Why efficiency of generator is higher than motor at a particular load?
Why synchronous motor is used in power factor improvement,dc series in lift
why we are using Load factor?
Why is voltage is required to be within permissible range for an electrical equipment?
why would amp draw on neutral wire be as much as amp draw on the hot leg.
