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Furan Testing of Transformers Oil
1. FURAN ANALYSES IN TRANSFORMER
PRESENTED BY:
Nitish Kumar, Nutan Chandra, Muna Kumar,
Subhajit Bhandari .
Guided By: Er. A Kannan
Dr. M.G.R. University
EEE Department
2. SCOPE
Analysis the 2-furtural and related furan
compounds during cellulosic insulation in mineral
insulating oil samples.
analyzed by high performance liquid
chromatography
(HPCL)
furan derivatives are extracted from the oil by use
of a extraction method such as liquid-liquid
extraction (method A) or solid-phase separation
on silica cartridge (method B).
3. ABSTRACT:
To determine of the life of Transformer and
the condition of Insulating Component furan
test conduct.
To Study the effect of oil reconditioning and
oil replacement on the furan values.
To Study the relationship between carbon die
- oxide and furan compounds in power
Transformers.
4. Introduction:
The insulating system of a transformer consist of both
paper and oil.
A transformer reaches the end of its life when its
insulation system totally lost its dielectric properties.
Moisture is introduce into the system, and particle
accumulate in the oil.
As the paper insulation ages, tensile strength decreases,
making the unit susceptible to winding failure during
mechanical stresses such as vibration, through faults and
short circuit.
Degradation of cellulosic materials produces CO and
CO2 gases. These gases dissolve in oil, by extracting these
gases and analyzing them, the paper insulation
degradation can be assessed.
5. Construction of Transformer
Definition of Transformer:
Electrical Power Transformer is a static device which transforms power from on circuit to
another without changing its frequency but may be in different voltage level.
Industrial transformer parts:
Frame, enclosure, tank
De-energized tap changer
Dual-voltage switch
Windings
Core
Control relays
Cooling fans
Pressure-relief Valve
Air terminal chambers
Nameplate or label
6. Production of Transformer oil
Transformer oil is hydrocarbon product,
mainly oil contains napthanic, parrafinic and
aromatics.
crude oil which is buried from earth crust.
Clay treatment process on TOBS will give us the
finished transformer oil.
After the hot filtration operation transformer oil
is ready for filling the transformers.
7. Types of Transformer Oil
Generally there are two types of Transformer Oil used in transformer
1. Paraffin based Transformer Oil
2. Naphtha based Transformer Oil
Naphtha oil is more easily oxidized than Paraffin oil. Paraffin based oil obstruct
the transformer cooling system. Although it has mentioned disadvantage but still
in our country it is generally used because of its easy availability.
9. Type of test conducted on
Transformer oil
Dissolved Gas Analyzer test
Break Down Voltage Test
Tan Delta & Resistivity Test
Total Acidity Test
Water Content Test
Inter Facial Tension Test
Furan Compounds Test.
10. WHAT IS FURAN?
Furan is a hetero cyclic aromatic system consisting of 4 carbon
and one oxygen in a five membered ring
Molecular formula is C4H4O
Structure of Furan Components
11. Insulation Paper
Evaluation through DP
Degree of Polymerization (DP): A
measure of length of cellulose chains
Value for fresh paper: 1000-1200
Value at End of life: 150-200
12. Paper Insulation
Mechanism of Degradation
Degradation is accelerated by temperature,
water and oxygen
Degradation by-products are:
Water and Carbon oxides
Furans
Alcohols, acids and aromatic & aliphatic
hydrocarbons
18. Conclusion:
REWIND / REPLACE SOLID INSULATION
This value are above shown data is available IEEE
In INDIA value are under study conducted by CPRI
State of Transformer Oil Standard Value of PPB
Normal 0 – 100
Questionable 101 – 250
Deteriorated 251 – 1000
Low Reliability 1001.– 2500
Rewind / Replace Solid Insulation >2500
The oil treatment is needed for keeping the transformer on
good technical condition & helps to make better the solid and
liquid insulation parameters.
19. 18 & 19 March 2011 ICCCET 2011 - National College of Engineering 20