Winding Resistance Ohmmeter Vanguard WRM-40 has successfully repaired by PT. Dynamics Circuit Indonesia

The WRM-40 is designed to accurately measure the winding resistance of highly inductive power transformers. The unit’s dual resistance-reading input channels can measure two winding resistances simultaneously, and four-wire (Kelvin) connections provide high accuracy and require no lead compensation.

The WRM-40 provides stable resistance readings of very large transformers by utilizing a 36Vdc power supply capable of outputting up to 40 Amperes. The resistance reading of a 500MVA transformer can be achieved in 5 minutes or less. The unit’s power supply is cooled by four heavy-duty fans designed for continuous operation. For greater fl exibility in the fi eld, the WRM-40 comes with a built-in 2.5-inch wide thermal printer used for printing test reports.

If any question about your vanguard instruments, don't hesistate to contact us :

PT. Dynamics Circuit Indonesia
Jl. P. Tubagus Angke No. 10 Blok C11
Komplek Jelambar Center
Grogol-Petamburan
Jakarta Utara, Indonesia
Phone : +62-21-29541370
Fax : +62-21-29541370
Email : adi.wahyu@dynamicscircuit.com
Office Hour : Monday to Friday, 08.00am to 05.00pm

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Three-Phase Transformer Turn Ratio Tester - Megger TTR310 successfully repaired and tested by PT. Dynamics Circuit Indonesia

The TTR300 Series of three-phase transformer turns ratio test sets are designed to measure the turns ratio of power, instrument, and distribution transformers in a substation or manufacturing environment. The instruments are ideal for use by power transformer manufacturers. Their unique testing procedures and storage capability allows an operator to setup and test difficult three-phase transformers in a fraction of the time than it used to take with other TTRs.

The TTR300 Series also measure the phase deviation of the transformer primary versus secondary. This quickly indicates problems such as partial shorted turns and core faults. This is also useful in verifying phase errors in all types of PTs and CTs.

Each unit comes equipped with a remote-control switch for single person testing. This allows the operator to test transformers with LTCs very quickly.

If any question about your Megger TTR310 instrument problem, don't hesistate to contact us :

PT. Dynamics Circuit Indonesia
Jl. P. Tubagus Angke No. 10 Blok C11
Komplek Jelambar Center
Grogol-Petamburan
Jakarta Utara, Indonesia
Phone : +62-21-29541370
Fax : +62-21-29541370
Email : adi.wahyu@dynamicscircuit.com
Office Hour : Monday to Friday, 08.00am to 05.00pm

 

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Three-Phase Transformer Turn Ratio Test Set - Megger TTR 550503 successfully repaired and tested by PT. Dynamics Circuit Indonesia

The Three-Phase Automatic TTR is designed to measure the turns ratio of power, instrument, and distribution transformers in a substation or manufacturing environment. At 16.5 lbs (7.5 kg), it weighs less than any other commercially available instrument. A rugged and robust design makes this TTR well suited for use in a variety of harsh environments. The TTR is also particularly suited for testing in power transformer manufacturing environments where testing of complex, three-phase substation power transformers can be performed quickly while minimizing the possibility of errors. This new TTR measures the highest turns ratio range in the industry (10,000:1) and also provides the highest accuracy (0.1%).

If any question about your Megger TTR550503 instrument problem, don't hesistate to contact us :

PT. Dynamics Circuit Indonesia
Jl. P. Tubagus Angke No. 10 Blok C11
Komplek Jelambar Center
Grogol-Petamburan
Jakarta Utara, Indonesia
Phone : +62-21-29541370
Fax : +62-21-29541370
Email : adi.wahyu@dynamicscircuit.com
Office Hour : Monday to Friday, 08.00am to 05.00pm 

 

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3-phase Automatic Ratio Tester - NDB ART-3D successfully repaired and tested by PT. Dynamics Circuit Indonesia

The ART-3D series are precision instruments, designed to measure turn ratios, phase displacements, excitation currents of single phase and three phase power, distribution and instrument transformers in conformity to the IEEE C57.12.90 & IEC 60076.

The instrument’s rugged design is perfectly suited to tackle the most challenging field or manufacturing environments. The anti-induction mode strongly enhances the efficiency of the measurements by countering the unwanted effect of nearby induction interference. The large, high contrast, color, touch screen display offers easy menu navigation, creation of test plans and viewing of test files. The integrated LTC control terminal allows for manual or fully automatic testing sequence of On-Load Tap changers with configurable pulse duration and duty cycle. The additional tertiary winding channel of the ART-3Dx will save a great deal of time, with onetime test connections to primary, secondary and tertiary windings. One of the ART-3D’s key features is the colored and graphical way of displaying LTC test results for interpretation in seconds!

With its real 3-phase test circuit, the ART-3D can address complex ratio measurements of PhaseShifting/Regulating or irregular vector group type transformers, otherwise impossible to achieve with conventional ratio meters. Zigzag type transformers testing is very easy and will not require the installation of jumpers or the use of relay matrix circuits. The single or real 3 phase voltage output up to 275V contributes to higher magnetization currents and therefore stronger flux for better signal reflection on secondary and/or tertiary windings allowing more accurate results. The ART-3D phase displacement measurements enables for simple detection of the transformer vector group.

If any question about your NDB ART-3D instrument problem, don't hesistate to contact us :

PT. Dynamics Circuit Indonesia
Jl. P. Tubagus Angke No. 10 Blok C11
Komplek Jelambar Center
Grogol-Petamburan
Jakarta Utara, Indonesia
Phone : +62-21-29541370
Fax : +62-21-29541370
Email : adi.wahyu@dynamicscircuit.com
Office Hour : Monday to Friday, 08.00am to 05.00pm

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Single Phase Transformer Turn Ratio Tester - Megger TTR Hand-Cranked successfully repaired and tested by PT. Dynamics Circuit Indonesia

The Single-phase TTR® Transformer Turns Ratio Test Set measures the turns ratio and exciting current of windings in power, potential and current transformers. Deviations in turns ratio readings indicate problems in one or both windings or the magnetic core circuit.

The TTR test set aids in identifying:

 - Shorted coils

 - Open circuits

 - Incorrect connections

 - Internal faults or tap-changer defects in step regulators as well as in transformers.

The single-phase, hand-cranked model measures highly sensitive turns ratios of up to 129.99:1 with accuracy of ±0.1%. An optional auxilary transformer extends the ratio range to 329.99:1.

The TTR set operates on the principle that the voltage ratio of the transformer at no load is practically equal to the true turns ratio.

The major source of error in a transformer is a primary impedance drop due to magnetizing current, which is kept to a minimum by excitation at a fraction of rated voltage. By employing a design that meets both of these conditions along with the use of a null balance system, the turns ratio of a transformer can be determined accurately.

When measuring the turns ratio of distribution and power transformers, the accuracy is well within 0.1%.

If any question about your instrument problem, don't hesistate to contact us :

PT. Dynamics Circuit Indonesia
Jl. P. Tubagus Angke No. 10 Blok C11
Komplek Jelambar Center
Grogol-Petamburan
Jakarta Utara, Indonesia
Phone : +62-21-29541370
Fax : +62-21-29541370
Email : adi.wahyu@dynamicscircuit.com
Office Hour : Monday to Friday, 08.00am to 05.00pm

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