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Tan-Delta test systems
 
Electrical properties of insulating systems change due to age and continuous electrical stress. Tan-Delta, also called Loss Angle or Dissipation Factor testing, is a diagnostic method of testing electrical equipment to determine the integrity of the insulation. By measuring electrical properties such as Capacitance and Tan-Delta regularly it is possible to ensure the operational reliability of HV insulating systems and to avoid costly insulation breakdown. This is particularly important for High-Voltage Bushings, Power Transformers, Generators, Power Capacitors, H.T. cables etc. Power Electronical manufactures a variety of Tan-Delta test systems to serve the different applications of testing Transformers, Oils, Generators, XLPE Cables, Capacitors etc.
Automatic_Tan-Delta-test-set
PE-ACDF-1 - Automatic Capacitance & Tan-delta tester 12kV 200mA
This is a complete integrated Capacitance and Tan-Delta test set including inbuilt
12kV AC power source
Measurement Bridge
and a reference SF6 gas filled Standard Capacitor.

It is simple to use and easy to operate. It has a large backlit LCD display, and soft touch membrane buttons. The connections are simple and the set can be operated by inexperienced operators. The set is extremely light-weight and portable enough to be carried by a single person.

Equipped with a USB serial output port, users can download their test results on PCs, or can use the internal 99 test storage facility. Integrated thermal Printer also allows printing of results on site. The instruments are calibrated in our in-house test laboratory to give you results traceable to national standards.
Features
  • High Interference suppression, good signal-to-noise ratio. Can be used in 765kV environments
  • UST, GST and GSTg test modes
  • CVT test facility
  • Input overvoltage & Output short-circuit protection
  • Ground check interlock
  • Application
  • Transformer testing
  • Testing Bushings, CTs, PTs, etc at substations
  • Testing Rotating machines (LV Motors/Generators) on-site
  • Tan-Delta-icon
    Download PDF
    Tan-Delta-2
    PE-HVTD-12/100 - Manual Capacitance & Tan-delta tester 12kV 100mA
    POWER ELECTRONICAL’s Manual Capacitance and Tan-Delta Test System (Model HVTD-12/100) has inbuilt HV Power Source, Standard Capacitor (SF6 Gas Filled), and set of cables. The compact design of the system uses the principle of three winding differential transformer on a high permeability mu-metal core to measure the Capacitance of the object and its Tan-Delta value accurately.

    The Capacitance & Dissipation Factor (Tan-Delta) Test System is contained in a sturdy metallic housing with mu-metal lining which shields it from external electromagnetic & electrostatic influences. Built-in battery powered Null indicator makes the system suitable for operation in workshop, factories, High Voltage Switch Yards etc. It is suitable for both grounded as well as ungrounded objects.

    The system is provided with High Voltage Protection Devices which protect the system and operator against failure of test object or standard capacitor.
    Features
  • 12kV 100mA
  • Tan-Delta accuracy of 1 X 10 -4
  • Low Dissipation factor Reference Standard Capacitor of 1 X 10E-5
  • UST, GST and GSTg testing modes
  • Open Ground Indication
  • HT Cut- off on overload.
  • All operating controls are at earth potential
  • Application
  • Transformer testing
  • Testing Bushings, CTs, PTs, etc at substations
  • Testing Rotating machines (LV Motors/Generators) on-site
  • Tan-Delta-icon
    Download PDF
    Tan-Delta system for HT Generators
    PE-HVTD-XX/YYY - Manual Capacitance & Tan-Delta (Dissipation Factor) tester 15kV 500mA for testing HT Generators/Motors
    15kV/500mA test sets have been specifically designed for testing very high Capacitances and Tan-Delta associated with large capacity HT Generators/Motors. These tan delta test sets used in conjunction with tuned reactors can test Generator windings at 13.8kV, either individually, or all the 3 phases together, without singling out each phase, thus saving a lot of testing time and giving a collective result.

    POWER ELECTRONICAL Capacitance and Tan-Delta Test System (Model SP15/500) includes a HV Power Source, Reference Standard Capacitor 1000pF/15kV (very low dissipation factor), a Measuring Bridge, and set of cables. The compact design of the system uses the principle of three winding differential transformer on a high permeability mu-metal core. The set is contained in a sturdy metallic housing with mu-metal lining which shields it from external electromagnetic & electrostatic influences. Built-in battery powered Null indicator makes the system suitable for operation in workshop, factories, High Voltage Switch Yards etc. It is suitable for both grounded as well as ungrounded objects.
    The system is provided with High Voltage Protection Devices which protect the system and operator against failure of test object or standard capacitor. The other safety features are -
  • Zero start control
  • Open Ground Indication Lamp
  • HT Cut¬ Off on overload
  • UST, GST and GSTg testing modes
  • HT ON/OFF Indication Lamp
  • All operating controls are at earth potential
  • The set consists of heavy shielded HV transformer with required tapping and current ranges with necessary controls and protective circuits, feeding transformer and its guard circuit and auxiliary bridge, all this to eliminate any bit of stray capacitance.
    Application
  • Testing Rotating machines (HT/MV Generators/Motors)
  • Testing High Voltage high value Capacitors
  • Tan-Delta-icon
    Download PDF
     
    Tan-Delta system for HT Generators
    Tunable Reactor (Variable Resonating Inductor)
    It expands the range of measurement of the Capacitance & Dissipation Factor (C&DF) test sets. Used in conjunction with the Tan-Delta test set, it allows extending the short term rating of power supply from 100mA up to 4A. This capacity is suitable for testing capacitances up to 1000nF (1µF) at 13.8kV, which is of utmost importance in HT/MV Generators, Motors etc.
  • Can be used in the UST, GST and GSTg modes
  • Use of resonating inductor does not alter the accuracy of measured Capacitance or Tan-Delta
  • Has selection tapping of 1A, 2A and 4A, at 10kV
  • Available in 1A, 2A and 4A models
  • Tan-Delta-5
    Tan-Delta-6
    High-Voltage SF6 Gas filled Standard Reference Capacitors
    Insulated Standard Capacitors are indispensable in every modern high-voltage laboratory and test field where it occupies a wide range of important functions.

    The SF6 insulated standard capacitor is used as Capacitance standard in measuring bridge circuits to measure the Dielectric Dissipation Factor (Tan-Delta) of all types including cables, capacitors, bushings, instrument transformers and power transformers. Further-more, It can be used as high-voltage capacitor for voltage divider circuits for high-voltage transformer test. Power Electronical’s standard capacitor’s insulation is of the highest accuracy and reliability. The result reflects a true advantage in high voltage measurements especially at high humidity levels.

    The SF6 insulated Standard Capacitor is also used in conjunction with our Capacitance and Tan Delta measuring bridges (e.g. PE-ACDF-1, and PE-MCDF-6 ) as a comparison standard for exact measurements of the Capacitance and Tan-D of HV equipment like cables, transformers, bushings, capacitors, etc. The capacitor is provided with a top electrode which allows partial discharge free interconnections to the other elements of the HV circuit.

    The SF6 insulated standard capacitor is designed for indoor service and is portable. The standard capacitors of the SCGF series are used for:

    * Exact measurements of the capacitance and tan delta

    * Exact measurements of AC voltages (AC divider)
    Specifications
  • Rated Voltage
  • – 5kV…500kV
  • Test Voltage
  • – 120% of rated High Voltage
  • Capacitance
  • – 50 pF…1000pF + 1%
  • Tan-Delta
  • < 1 X 10-5 (0.00001 or 0.001%)
  • PD level
  • < 5pC
    Tan-Delta-icon
    Download PDF
    To be used in conjunction with Capacitance & Tan-Delta (Dissipation Factor) bridges (PE-ACDF-1)
     
     
    Designed by :