TESTING INSTRUMENTS FOR CONDITION MONITORING AND DIAGNOSTIC TESTING SERVICES
                                                                                                                            

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 1.0   Capacitance and Tan delta test set :
          Make : Doble , Type : M4000

          The operation of Capacitance and Tan delta test set is fully controlled by Laptop and
          supervised by versatile software. This software controls the application of voltage, balancing
          of bridge, collects the test data, analyses the data, display the same in tabular and graphical
          format. The test data for respective HT equipments are stored for establishing the trending
          periodically, which is very important for any condition monitoring testing.
           1.1   Laptop with latest configuration with all licensed software
           1.2   User friendly Visual C++ windows Software for operation, data  collection, data retrieving
                    for C & Tan d test.
           1.3   Measuring range of bridge for Tan d : 0 to 100 % Resolution 1x 10 ^{– 4} accuracy + 1% of
                   the reading up to 20% range.
           1.4   Measuring range of bridge for capacitance: 1pF to 1.1mF and Resolution  0.1pF on lowest
                   range and accuracy + 0.25 % of the reading.
           1.5   Calibration unit for validating accuracy at site.
           1.6   Induction cancellation unit for 400kV switchyard operation.
           1.7  0-12kV AC supply with 200 m A continuous and 400 m A intermittent (15 min.)
           1.8  Resonating Inductor with current rating up to 3Amps. (satisfies the rating to test up to
                  250MW-machine with13.5KV Line Voltage)        

2.0  Tan delta, Dielectric Constant and Resistivity measurement test set with  
        Oil Cell and Oil cell Heater for insulating oils

         2.2    Oil test cell as per BIS standards

         2.3    Heater for Temp, up to 150 °C
 

        3.2    The Unit of measure is apparent charge pico coulomb (pC)

        3.3    The ndb make XDPIIB test instrument can be used :

•   To check the insulation quality of HT equipment at the time of manufacture.

•   To have the base foot print values before commissioning.

•   To check the discharge values during every maintenance cycle to check the ageing of the
                 insulation.

         Detailed description of this test can be viewed at : www.powersystemconsultant.com/htm/partialdischarge.htm

4.0   Sweep Frequency Response Analyzer (SFRA) : For Transformer Core and
         Winding Movement Diagnosis.

         4.1   The best diagnostic instrument for detecting "hidden" transformer defects

         4.2   The M5200 detects mechanical failure or movement of windings due to short
                  circuits, mechanical stresses, or transportation. Used to ensure transformer
                  performance, reduce maintenance cost, reliability and increase the service
                  life of transformers.

         4.3   The M5200 can "see" inside transformers and can detect problems early,
                  before they become costly failures. This test is used ;

• To improve the quality of your regular inspection program

• To eliminate unnecessary detanking and costly internal inspections

• To check new transformers to verify good condition on site

• To inspect for damage if the 'transformer' has experienced mechanical
               stress during transportation or in service

• In case of system problems, like short-circuit faults that can damage
              transformers

• After earthquakes, lightning, or other environmental events

         4.4  The entire set is operated with a software which can be used for analyzing
                 SFRA plots. Detailed description of this test can be viewed at :
                  www.powersystemconsultant.com/htm/SFRA.htm

  5.0  HV / MV Power Cables testing by : Very Low Frequency (VLF) test method

           5.3   The VLF test set detects ageing of the cable insulation, defects in insulation, by
                    measuring the dielectric loss of the insulation.

        6.0   Lightning Arrester Test Set : For ON line health check up of Lightning
                Arresters

                Make : ISA, Italy,  Type : SCAR 10

                6.1   Lightning arresters are tested online

                6.2   Online testing of Lightning Arrester is carried out by harmonic
                        analysis of leakage current. The harmonic analysis is used as 
                        a tool to diagnose the health / reliability of the Lightning
                        Arrester in online.

                6.3   This test set has an inbuilt voltage compensation circuit which is
                        useful in charged switchyards where 3rd harmonic voltages if present
                        will cause error in harmonic current measurement.

                6.4   Detailed description of this test can be viewed at
                       : www.powersystemconsultant.com/htm/SCAR-10.htm

        7.0  RSO Test Set : For main rotor winding Earth fault and Inter turn fault
               detection.

               The testing instrument used is,

                Rotor Reflectometer, Type : TDR 100, 
                Make : Convex Design Ltd., Bristol, England.

               7.1   This is a world renowned, highly accurate Rotor Reflectometer for
                        Recurrent Surge Oscillograph test.

               7.2   There are several modes in which the Reflectometer can be used.
                        These are,
                        a) Testing of stationary rotor within generator,
                        b) Testing of rotor at speed within generator (unexcited) and
                        c) Testing of rotor when removed from generator

               7.3   Testing set can be used for,
                        a) Fault between winding and rotor body (earth fault).
                        b) Inter turn fault.
                        c) High resistance joint in rotor.
                        d) Inter winding fault.
 

               7.4    Detailed description of this test can be viewed at
                        : www.powersystemconsultant.com/htm/RSO.htm

        8.0   Digital Dual Channel Storage oscilloscope

                Make : Tektronix, USA  with PC communication 
                software.

                This equipment is used in conjuction with RSO test
                instrument and partial discharge measurement for
                storage, transfer of measured wave form.

        9.0   Motorized digital megger having 500,1000,2500 & 5000V
                DC output ranges with high accuracy
                Insulation Resistance value and Polarization Index
                measurement.

               It is used for measuring winding resistance of Alternators, Transformer, HT motor,
              Current transformer secondary winding, circuit breaker power contact resistance etc.

               10.1   Output      :  1 Amp and 10 Amp DC

               10.3   Accuracy  :  ± 0.1% of range

               Special features of winding Resistance meter are as follows

1. High stability, high voltage compliance and extremely low ripple source.

2. Totally protected against inductive load and ranges

3. Test current can be selected

4. Suitable for live switchyard

5. Fast and stable readings for inductive loads

6. True four wire system of measurement

7. High resolution

8. Direct readout of resistance on 4.5 digit LCD display with backlight

9. Works on 230V AC mains