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Oil suffers from electrical and mechanical stresses while a transformer is in operation. In addition there are contaminations caused due to chemical interactions with windings and other solid insulations, catalyzed by high operating temperature. As a result the original chemical properties of Transformer Oil changes gradually, rendering it ineffective for its intended purpose after many years. Hence this oil has to be periodically tested to ascertain its basic electrical properties, and make sure it is suitable for further use, or necessary filtration/regeneration has to be done.
Testing of DC resistivity and Tan-delta/Dissipation-Factor of such insulating Oils is one of the most critical tests to determine the Oil condition. Power Electronical provides instruments to achieve this objective of accurately measuring the Power-Factor and Volume Resistivity of Insulating liquids |
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| PE-AORDF-1 – Fully Automatic Oil Dissipation Factor (Tan-delta) and Resistivity tester |
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| PE-AORDF-1 Fully Automatic Oil Resistivity & Tan-delta tester is a 2-pc unit, consisting of Heater unit and Measuring Bridge. The Stainless Steel oil cell is to be mounted inside the Heater unit. Heater unit is separated from main unit, to avoid component derating and influence of temperature on measurements Measuring Bridge consists of AC/DC high voltage supply, Tera-ohm meter, and precision electronic bridges to measure & derive the readings for |
Resistance
Resistivity
Capacitance
Power Factor
Tan-delta
Watt-loss
Dielectric Constant
Temperature
Voltage
Frequency |
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Oil suffers from electrical and mechanical stresses while a transformer is in operation. In addition there are contaminations caused due to chemical interactions with windings and other solid insulations, catalyzed by high operating temperature. As a result the original chemical properties of Transformer Oil changes gradually, rendering it ineffective for its intended purpose after many years. Hence this oil has to be periodically tested to ascertain its basic electrical properties, and make sure it is suitable for further use, or necessary filtration/regeneration has to be done.
Testing of DC resistivity and Tan-delta/Dissipation-Factor of such insulating Oils is one of the most critical tests to determine the Oil condition. Power Electronical provides instruments to achieve this objective of accurately measuring the Power-Factor and Volume Resistivity of Insulating liquids |
| Pre-programmed international test methods compliant to |
| ASTM-D924-04 l ASTM-D1169 l VDE-0380-2 l
IEC-60247 l IEC-61620 l BS-5737 |
| Features |
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Complete automatic test procedure. Once test voltage is selected, it applies excitation to the 3-terminal Oil cell, measures R, C, DF, F, V, and then displays and prints the results on integrated printer
High Accuracy, Best resolution in its class
Pure Sine test operation for AC measurements and <0.1% ripple for DC measurements
Heater interfaced with main unit for temperature set, control and display
Multiple temperature set values programmable
Measures cell constant automatically for Resistivity and Dielectric Constant
SF6 Gas Capacitor integrated inside for std reference
Big Touch-screen LCD 320 X 240 with white LED backlit for user convenience
Integrated Programmable AC & DC test voltages
Thermal printer for immediate printing
Pre-programmed 9 test sequences, and user-programmable 10 test sequences
USB2.0 interface for PC
PC software for control and display of test results
On-site calibration possible for yearly schedule
SF6 Gas Capacitor integrated inside for std reference
Optional Bluetooth/RS485/RF interface with user definable config, for Automated Laboratory setup
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| PE-ORDF-2 – Oil Resistance & Oil Tan-delta tester (3-pc set…Heater unit, TD unit, Res unit) |
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PE-ORDF-2 Oil Resistivity & Dissipation Factor Test set is a combination of 3 instruments, which can be applied to measure Resistance & Tan-delta of the Oil under test. The Volume Resistivity of insulating oil is derived from the measured value of Resistance. It is 3-piece set, consisting of the Heater unit (and Stainless Steel oil cell), Million-mega-ohm meter, and the Dissipation Factor bridge to derive the readings.
The Insulation resistance testing instrument is available in max test voltages of 500V DC and 1000V DC, and can be ordered accordingly. Voltages lower than them are available to be set from the front panel via the selector switch |
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| Features |
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Wide measurement range
Completely solid state circuitry, hence drift-free operations
Completely protected against all overloads and short-circuits
Suitable for testing “Earthed” samples
High power coil heating, precision point control implemented
Adjustable temperature from ambient to 150 deg C
Separate visual push buttons for “Charge” & “Discharge” for rapid and safe testing
Can implement testing as per ASTM D924, IEC60247, IS6262/6103 test methods
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| Oil Cell 2kV (Compliant to IS/IEC/CIGRE standards) |
| Specifications |
| Material |
– Stainless Steel |
| Insulation Material |
– Teflon |
| Max test voltage |
– 2500V AC / 1500V DC |
| Cell Capacitance |
– 55pF + 5% |
| Cell Volume |
– 50ml (approx) |
| Max Operating Temp |
– 150 deg C |
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| To be used in conjunction with Oil Tan-delta (Dissipation Factor) and DC resistivity bridges (PE-AORDF-1 / PE-ORDF-2) |
| Oil Cell 10kV |
| Specifications |
| Material |
– Stainless Steel |
| Insulation Material |
– Teflon |
| Max test voltage |
-- 12000V AC / 10000V DC |
| Cell Capacitance |
– 55pF + 5% |
| Cell Volume |
– 50ml (approx) |
| Max Operating Temp |
– ambient |
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| To be used in conjunction with Capacitance & Tan-delta (Dissipation Factor) bridges (PE-ACDF-1) |
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