Transformer Testing Services:-
We are having following Testing Facility for Transformer
• Dielectric Response Analyzer (DIRANA) Test
• Impulse Test up to 2400KV
• SFRA Test (Make: Doble)
• Tan Delta Test (Make: Megger)
• High Voltage Test
• Insulation Resistance Test
• Winding Resistance Test (Scope)
• Voltage Ratio Test
• Measuring Open Circut Voltage
• Measurement S C Current Test
• OTI and WTI Calibration
• Magnetic Balance Test
• Magnetizing Current Test
• Partial Discharge Test • Spill Current Test
• DVDF Test
• BDV Test of Transformer Oil
• Impedance Voltage Test
• Vector Group Test
• Earth Resistance Test
• CT Testing (Kneepoint Voltage Test& Primary Injection)
• Due Point Test( Doble Make Kit)
• Moisture Content in Oil(PPM) (Doble Make Kit)
• Moisture Content in SF6 Gas (Doble Make Kit)
• CT ,PT & Power Analyser for Loss Measurement(Yokohama)
Dielectric Response Analyzer(DIRANA)Test:
Dielectric Response Analyzer (DIRANA) Test on Transformer Winding (To determine the moisture content in oil-paper insulation of Winding by Direct Measurement).
This is the Most Advanced Method of Determining
the Moisture Content in oil-paper insulations of
Transformer Winding.
The DIRANA reduces the required measurement time to 50%, as the device uses a combination of the time and frequency range method (Polarization Depolarization Current [PDC] and Frequency Domain Spectroscopy [FDS]).
Applications:-
• Water analysis of oil-paper insulation
• Capacitance and dissipation factor measurement on power transformers
• Dissipation factor measurement and determination of ageing on bushings
• Diagnosis of generator, motor and cable insulation, as well as instrument transformers
Key Features:-
• Extremely fast measurements reduce downtimes
• Detailed connection diagrams show the correct wiring for various measurement scenarios
• Automatic determination of the water content with the DIRANA software (no expert knowledge required)
• Reliable moisture content determination for new and aged oil-paper insulation
• No overestimation of water content due to unique compensation for ageing by products
• Evaluation of very dry transformers due to a wide measuring range of 5 kHz to 10 µHz
SFRA Test (Sweep Frequency Response Analysis):
Doble Make SFRA Test Kit
The Purpose of SFRA Test is mainly to check any
Mechanical Dislocation inside your transformer during
Transportation or due to Fault Condition.
Region Frequency Sub-Band Components
1. < 10 kHz Main Core; Bulk Winding (Inductance)
2. 10 kHz to 150 kHz Bulk Component Shunt Impedances
3. 150 kHz to 400 kHz Main Windings
4. 400 kHz to ~1 MHz Main windings, Tap windings etc
CAPACITANCE AND TAN DELTA TEST:
In This Test Insulation power factor or dissipation factor (Tan delta) and Capacitance measurement of bushing provide an indication of the quality and soundness of the insulation in the bushing.( Eltel Make Tandelta Testing Kit Megger Make Tandelta Testing Kit)
In this Test voltage upto 10KV is Applied to Bushing and Winding.There are Two type mode of measured in this method UST & GST Mode.
Insulation Resistance Test(5000 Volts):
Insulation resistance (IR) measurement is the simplest and most widely used test to check the soundness of transformer insulation. This test reveals the condition of insulation (i.e.Degree of dryness of paper insulation), presence of any foreign contaminants in oil and also any
gross defect inside the transformer (like failure to remove the temporary transportation bracket on the live portion of tap-changer part).
(Kyoritsu Make Insulation Resistance Testing Kit )
Winding Resistance Test(25AMPS):
Transformer winding resistance are measured in the field
in order to check for any abnormalities due to loose
connections, broken strands and high contact resistance
in tap changers as a pre-commissioning checks and
compare the measured values with factory
test values.
(Scope Make Winding Resistance Test Testing Kit )
Voltage Ratio Test:
To determine the turns ratio of transformer, Turns Ratio:
The Turns Ratio of a transformer is the ratio of the number of turns in a higher voltage winding to that in a lower voltage winding. Transformer turns ratio (TTR) meter available in convenient portable form. They have a hand crank power supply, with the voltages commonly used being very low, such as 12-120 V and 50-60 Hz. (Eltel Make Voltage Ratio Testing Kit )
Partial Discharge Testing Kit:
This routine test aims to measure the partial discharges which may occur in the transformer insulation structure during test.
Partial-discharges are electrical arks which form the surges between electrodes of any area of the insulating media of a transformer between the conductors. These discharges may occur in air bubbles left in the insulating media, gaps in the solid materials or at the surfaces of two different insulators.
Although these discharges have small (weak) energy, the thermal energies due to these discharges can cause aging, deformation and tear of the insulating material.
The following conditions can be determined during partial-discharge measurement:
1. To determine whether a partial-discharge above a certain value has occurred in the transformer at a pre-defined voltage.
2. To define the voltage values where the partial-discharge starts by increasing the applied voltage (partial-discharge start voltage) and
the value where the partial-discharge ceases by decreasing the applied voltage (partial-discharge cease voltage).
3. To define the partial-discharge strength at a pre-defined voltage.
Details of Major Testing Works Carried out :-
Equipment :- Reactor
Rating: 80MVAR,voltage class:765 kv
Site:-PGCIL Bina- Alstom; Ranchi –TBEA; PGCIL Kurnool, Gaya, Raichur –Alstom.
Mahagenco (AFANI)- Hyundai
PGCIL Moga – Alstom.
PGCIL Bhiwani – TBEA
PGCIL Jabalpur –Alstom
Test Details- CT, LT ,Tan Delta and SFRA and Particle Counter,
Vibration test and Noise level measurement.
400kv Class reactor
NTPC Meja -63MVAR – Make:- Alstom.
PGCIL Tumkur –63MVAR – Make:- CGL
PGCIL thiruvallam-63MVAR – Make:- CGL
North Chennai(NCTPS) -63MVAR – Make:-BHEL
PGCIL kovilpatti-63MVAR – Make:- BHEL
Test Details:- CT, LT ,Tan Delta and SFRA
1.Equipment :- ICT
Voltage : 765/400/33kv
Rating:-500MVA
Site :- PGCIL Ranchi, Sundargrh(Jharshuguda), Pgcil Jabalpur
2.Equipment :-GT
Rating: 355 mva
Site : S.K.S Raigarh
Make ;BHEL
3. Equipment :-GT
Rating: 370 mva
Site : Dhariwal infrastructure PVT ltd,Chandrapur
Make : Alstom
4. Equipment : TANTRANSCO, Sriperumbudur
Rating: 315 mva: voltage :400/230/33 KV
Test Details:- CT, LT ,Tandelta , DIRANA and SFRA
5.Equipment :-GT
Rating: 275 MVA: voltage :400/230/33 kV
Site : S.K.S Raigarh
Make ;BHEL
Test Details:- CT, LT ,Tandelta and SFRA
6.Equipment :-ICT :
voltage :765/220/33 kV
Make: BHEL –BIDCO Lalitpur.
LIFE ASSESMENT TESTS :
1)Premier Mills
Raing : 16 MVA
Make : AREVA
2)Nuclear Fuel Complex Ltd
Rating : 31.5 MVA
Make : General Electric Company Ltd
3)Numaligarh Refinery Ltd
Rating : 10 MVA
Make : Voltamp Transformers Ltd
Tests Performed : LT,Tan Delta, DIRANA & SFRA
TESTING OF REPAIRED TRANSFORMERS :
1)Mettur Thermal Power Station
Rating : 250 MVA
Make : AREVA
2)400/230/33 KV SS, Sriperumpudhur.
Rating : 315 MVA
Make : Crompton Greaves Ltd.
3)Rourkela Steel Plant
Rating : 2.7 MVA
Make : The Indian Transformers Ltd
Tests Performed : LT,Tan Delta, DIRANA & SFRA
TESTING OF OVERHAULED TRANSFORMERS :-(Including LT & Tan Delta Tests )
1)Datia & Lalitpur TSS : 12.5 MVA, BHEL Make.
2)Tirupathur TSS : 21.6 MVA, TELK Make.
For More Details send your Enquiries or Call us.
Shree Abirami Enggineering Works.
Plot No: 56, Arunachalam Main Road,
Ambal Nagar, Porur,
Chennai-600 116.
Phone : +91-44-2482 5906 ,2482 7572, 2482 7769,2482 7256,4383 3142
Telefax : +91-44-2482 7572
Mobile : +91 9444386906,9841044595
E-mail : saew92@gmail.com
Website : www.abiramiengg.in
Website : www.abiramiengg.com
We are having following Testing Facility for Transformer
• Dielectric Response Analyzer (DIRANA) Test
 |
| IMPULSE TESTING UP TO 2400KV |
• SFRA Test (Make: Doble)
• Tan Delta Test (Make: Megger)
• High Voltage Test
• Insulation Resistance Test
• Winding Resistance Test (Scope)
• Voltage Ratio Test
• Measuring Open Circut Voltage
• Measurement S C Current Test
• OTI and WTI Calibration
• Magnetic Balance Test
• Magnetizing Current Test
• Partial Discharge Test • Spill Current Test
• DVDF Test
• BDV Test of Transformer Oil
• Impedance Voltage Test
• Vector Group Test
• Earth Resistance Test
• CT Testing (Kneepoint Voltage Test& Primary Injection)
• Due Point Test( Doble Make Kit)
• Moisture Content in Oil(PPM) (Doble Make Kit)
• Moisture Content in SF6 Gas (Doble Make Kit)
• CT ,PT & Power Analyser for Loss Measurement(Yokohama)
Dielectric Response Analyzer(DIRANA)Test:
Dielectric Response Analyzer (DIRANA) Test on Transformer Winding (To determine the moisture content in oil-paper insulation of Winding by Direct Measurement).
This is the Most Advanced Method of Determining
the Moisture Content in oil-paper insulations of
Transformer Winding.
The DIRANA reduces the required measurement time to 50%, as the device uses a combination of the time and frequency range method (Polarization Depolarization Current [PDC] and Frequency Domain Spectroscopy [FDS]).
Applications:-
• Water analysis of oil-paper insulation
• Capacitance and dissipation factor measurement on power transformers
• Dissipation factor measurement and determination of ageing on bushings
• Diagnosis of generator, motor and cable insulation, as well as instrument transformers
Key Features:-
• Extremely fast measurements reduce downtimes
• Detailed connection diagrams show the correct wiring for various measurement scenarios
• Automatic determination of the water content with the DIRANA software (no expert knowledge required)
• Reliable moisture content determination for new and aged oil-paper insulation
• No overestimation of water content due to unique compensation for ageing by products
• Evaluation of very dry transformers due to a wide measuring range of 5 kHz to 10 µHz
SFRA Test (Sweep Frequency Response Analysis):
Doble Make SFRA Test Kit
The Purpose of SFRA Test is mainly to check any
Mechanical Dislocation inside your transformer during
Transportation or due to Fault Condition.
Region Frequency Sub-Band Components
1. < 10 kHz Main Core; Bulk Winding (Inductance)
2. 10 kHz to 150 kHz Bulk Component Shunt Impedances
3. 150 kHz to 400 kHz Main Windings
4. 400 kHz to ~1 MHz Main windings, Tap windings etc
CAPACITANCE AND TAN DELTA TEST:
In This Test Insulation power factor or dissipation factor (Tan delta) and Capacitance measurement of bushing provide an indication of the quality and soundness of the insulation in the bushing.( Eltel Make Tandelta Testing Kit Megger Make Tandelta Testing Kit)
In this Test voltage upto 10KV is Applied to Bushing and Winding.There are Two type mode of measured in this method UST & GST Mode.
Insulation Resistance Test(5000 Volts):
Insulation resistance (IR) measurement is the simplest and most widely used test to check the soundness of transformer insulation. This test reveals the condition of insulation (i.e.Degree of dryness of paper insulation), presence of any foreign contaminants in oil and also any
gross defect inside the transformer (like failure to remove the temporary transportation bracket on the live portion of tap-changer part).
(Kyoritsu Make Insulation Resistance Testing Kit )
Winding Resistance Test(25AMPS):
Transformer winding resistance are measured in the field
in order to check for any abnormalities due to loose
connections, broken strands and high contact resistance
in tap changers as a pre-commissioning checks and
compare the measured values with factory
test values.
(Scope Make Winding Resistance Test Testing Kit )
Voltage Ratio Test:
To determine the turns ratio of transformer, Turns Ratio:
The Turns Ratio of a transformer is the ratio of the number of turns in a higher voltage winding to that in a lower voltage winding. Transformer turns ratio (TTR) meter available in convenient portable form. They have a hand crank power supply, with the voltages commonly used being very low, such as 12-120 V and 50-60 Hz. (Eltel Make Voltage Ratio Testing Kit )
Partial Discharge Testing Kit:
This routine test aims to measure the partial discharges which may occur in the transformer insulation structure during test.
Partial-discharges are electrical arks which form the surges between electrodes of any area of the insulating media of a transformer between the conductors. These discharges may occur in air bubbles left in the insulating media, gaps in the solid materials or at the surfaces of two different insulators.
Although these discharges have small (weak) energy, the thermal energies due to these discharges can cause aging, deformation and tear of the insulating material.
The following conditions can be determined during partial-discharge measurement:
1. To determine whether a partial-discharge above a certain value has occurred in the transformer at a pre-defined voltage.
2. To define the voltage values where the partial-discharge starts by increasing the applied voltage (partial-discharge start voltage) and
the value where the partial-discharge ceases by decreasing the applied voltage (partial-discharge cease voltage).
3. To define the partial-discharge strength at a pre-defined voltage.
Details of Major Testing Works Carried out :-
Equipment :- Reactor
Rating: 80MVAR,voltage class:765 kv
Site:-PGCIL Bina- Alstom; Ranchi –TBEA; PGCIL Kurnool, Gaya, Raichur –Alstom.
Mahagenco (AFANI)- Hyundai
PGCIL Moga – Alstom.
PGCIL Bhiwani – TBEA
PGCIL Jabalpur –Alstom
Test Details- CT, LT ,Tan Delta and SFRA and Particle Counter,
Vibration test and Noise level measurement.
400kv Class reactor
NTPC Meja -63MVAR – Make:- Alstom.
PGCIL Tumkur –63MVAR – Make:- CGL
PGCIL thiruvallam-63MVAR – Make:- CGL
North Chennai(NCTPS) -63MVAR – Make:-BHEL
PGCIL kovilpatti-63MVAR – Make:- BHEL
Test Details:- CT, LT ,Tan Delta and SFRA
1.Equipment :- ICT
Voltage : 765/400/33kv
Rating:-500MVA
Site :- PGCIL Ranchi, Sundargrh(Jharshuguda), Pgcil Jabalpur
2.Equipment :-GT
Rating: 355 mva
Site : S.K.S Raigarh
Make ;BHEL
3. Equipment :-GT
Rating: 370 mva
Site : Dhariwal infrastructure PVT ltd,Chandrapur
Make : Alstom
4. Equipment : TANTRANSCO, Sriperumbudur
Rating: 315 mva: voltage :400/230/33 KV
Test Details:- CT, LT ,Tandelta , DIRANA and SFRA
5.Equipment :-GT
Rating: 275 MVA: voltage :400/230/33 kV
Site : S.K.S Raigarh
Make ;BHEL
Test Details:- CT, LT ,Tandelta and SFRA
6.Equipment :-ICT :
voltage :765/220/33 kV
Make: BHEL –BIDCO Lalitpur.
LIFE ASSESMENT TESTS :
1)Premier Mills
Raing : 16 MVA
Make : AREVA
2)Nuclear Fuel Complex Ltd
Rating : 31.5 MVA
Make : General Electric Company Ltd
Rating : 10 MVA
Make : Voltamp Transformers Ltd
Tests Performed : LT,Tan Delta, DIRANA & SFRA
TESTING OF REPAIRED TRANSFORMERS :
1)Mettur Thermal Power Station
Rating : 250 MVA
Make : AREVA
2)400/230/33 KV SS, Sriperumpudhur.
Rating : 315 MVA
Make : Crompton Greaves Ltd.
3)Rourkela Steel Plant
Rating : 2.7 MVA
Make : The Indian Transformers Ltd
Tests Performed : LT,Tan Delta, DIRANA & SFRA
TESTING OF OVERHAULED TRANSFORMERS :-(Including LT & Tan Delta Tests )
1)Datia & Lalitpur TSS : 12.5 MVA, BHEL Make.
2)Tirupathur TSS : 21.6 MVA, TELK Make.
For More Details send your Enquiries or Call us.
Shree Abirami Enggineering Works.
Plot No: 56, Arunachalam Main Road,
Ambal Nagar, Porur,
Chennai-600 116.
Phone : +91-44-2482 5906 ,2482 7572, 2482 7769,2482 7256,4383 3142
Telefax : +91-44-2482 7572
Mobile : +91 9444386906,9841044595
E-mail : saew92@gmail.com
Website : www.abiramiengg.in
Website : www.abiramiengg.com
