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VCP Trading keeps a high level of work standards and quality, carefully choosing the products it represents. All product lines take pride in following global standards, good quality control and a stellar brand reputation.

Exciting Current Test

Typically part of preventive maintenance test procedures, the exciting current test is also performed during commissioning, acceptance, and after fault/trip.  The Exciting Current Test provides information and measurement on abnormal core grounds, winding faults (shorts and open circuits), manufacturing defects, and load tap changer problems.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Transformer Turns Ratio

This test can detect shorted turns in the windings or a defective tap changer. The Turns Ratio Test (TAR) will detect and confirm a difference in voltages between phases. This means, that your transformer is not operating up to the manufacturer’s specifications and is not producing proper output voltages. This is also an early indication of transformer failure. It can also be used for transformer acceptance testing when a new transformer is installed. This will also be a base line for future diagnostics.

Winding Resistance

Winding Resistance Test determines the I2R losses in the transformer, and as a benchmark for assessing possible damages in the field.  As a  routine test procedure, this procedure is used to determine abnormalities due to loose connections, broken strands of conductors, high contact resistance in tap changers, high voltage leads, and bushings.

Insulation Power Factor

Better known as the “DOBLE Test”, IPF or insulation power factor test is the most comprehensive measurement of insulating properties of a power transformer or any apparatus with a winding.  Elements such as deterioration, contamination, moisture, and heat can breakdown dielectric strength.  Insulation Power Factor Testing measures the dielectric losses due to leakage current thru the insulation.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Winding Resistance

Winding Resistance Test determines the I2R losses in the transformer, and as a benchmark for assessing possible damages in the field.  As a  routine test procedure, this procedure is used to determine abnormalities due to loose connections, broken strands of conductors, high contact resistance in tap changers, high voltage leads, and bushings.

Corrosive Sulfur

Corrosive sulfur and the effect that it has in transformer systems can be significant. The extent of the corrosion damage caused by sulfur, if left unchecked can cause failure of the apparatus. Sulfur is found in many materials of transformer construction including the copper, paper insulation, gaskets and oil. Not all sulfur is considered corrosive but the tendency to operate transformers at substantially higher temperatures can aggravate an already present corrosive sulfur condition or convert stable compounds into reactive ones that will cause damage.

DBV

The dielectric breakdown voltage test is a measure of an insulating oil’s ability to withstand higher than rated voltage.  Typically it is desirable that the breakdown voltage is high rather low.  The DBV test can indicate the presence of moisture in oil.

Furan Analysis

When the cellulosic insulation materials within a transformer undergo degradation some of the products formed are derivatives of the aromatic compound called furan.  The five most prevalent derivatives of furan that arise from the degradation of the cellulose and that are soluble in the oil to an appreciable degree are the following: 2-Furaldehyde ; Furfuryl alcohol ; 2-Acetylfuran ; 5-Methyl-2-furaldehyde ; and 5-Hydroxymethyl-2-furaldehyde.  The five furanic materials normally analyzed in this procedure are aromatic compounds that arise from the degradation of the cellulosic materials within a transformer either by normal aging or from being involved with an incipient fault. Thus the amount of these products present in the oil might be a good indication of the condition of the cellulosic insulation.

Interfacial Tension

As insulating oil ages, the same is contaminated by oxidized by-products of oil and paper insulation. Particles on top of water extend across the water and oil interface line which weakens the surface tension between two liquids. Particles in oil weaken interfacial tension and lower interfacial tension number.

Moisture In Oil

In the presence of oxygen, moisture can pose extreme hazards to transformer insulation.  Typically, when moisture presence in insulating oils are doubled, the life of an insulating system is reduced by half.

Exciting Current Test

Typically part of preventive maintenance test procedures, the exciting current test is also performed during commissioning, acceptance, and after fault/trip. The Exciting Current Test provides information and measurement on abnormal core grounds, winding faults (shorts and open circuits), manufacturing defects, and load tap changer problems.

Insulation Power Factor

Better known as the “DOBLE Test”, IPF or insulation power factor test is the most comprehensive measurement of insulating properties of a power transformer or any apparatus with a winding. Elements such as deterioration, contamination, moisture, and heat can breakdown dielectric strength. Insulation Power Factor Testing measures the dielectric losses due to leakage current thru the insulation.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Transformer Turns Ratio

This test can detect shorted turns in the windings or a defective tap changer. The Turns Ratio Test (TAR) will detect and confirm a difference in voltages between phases. This means, that your transformer is not operating up to the manufacturer’s specifications and is not producing proper output voltages. This is also an early indication of transformer failure. It can also be used for transformer acceptance testing when a new transformer is installed. This will also be a base line for future diagnostics.

Winding Resistance

Winding Resistance Test determines the I2R losses in the transformer, and as a benchmark for assessing possible damages in the field. As a routine test procedure, this procedure is used to determine abnormalities due to loose connections, broken strands of conductors, high contact resistance in tap changers, high voltage leads, and bushings.

Acoustic Pinpointing

Cable diagnostics and pre-location can provide invaluable data for directly buried cables. Acoustic pinpointing is possible thru the use of a surge generator and a “ground” microphone pinpointing device to show the exact location of the fault.

Cable Diagnostics

Upon completion of an insulation resistance test, we can determine and clasify the type of insulation fault a cable has. If the insulation resistance measurement falls below 100Ω, this is considered a low ohmic resistance fault that can be located by the use of a Time Domain Reflectometer, however if the fault that exists is beyond 100Ω, the fault must then be converted to a low ohmic resistance fault by process of permanent burning, impluse current, or voltage decay.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Partial Discharge

PD defined is a localized dielectric breakdown within a small portion of an electrical insulation system under stress of high voltage, which does not bridge the space between two conductors. Partial Discharge is not yet a complete failure of the insulation, however, it is an indication of what is to come. PD testing determines the presence, and locates PD activity within a system.

Insulation Power Factor

Better known as the “DOBLE Test”, IPF or insulation power factor test is the most comprehensive measurement of insulating properties of a power transformer or any apparatus with a winding. Elements such as deterioration, contamination, moisture, and heat can breakdown dielectric strength. Insulation Power Factor Testing measures the dielectric losses due to leakage current thru the insulation.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Partial Discharge

PD defined is a localized dielectric breakdown within a small portion of an electrical insulation system under stress of high voltage, which does not bridge the space between two conductors. Partial Discharge is not yet a complete failure of the insulation, however, it is an indication of what is to come. PD testing determines the presence, and locates PD activity within a system.

Dissolved Gas Analysis

The DGA is one of the easiest, most convenient test that can be performed on a power transformer, yet it is one of the most important. DGA determines the health of a transformer’s insulating oil.

Exciting Current Test

Typically part of preventive maintenance test procedures, the exciting current test is also performed during commissioning, acceptance, and after fault/trip. The Exciting Current Test provides information and measurement on abnormal core grounds, winding faults (shorts and open circuits), manufacturing defects, and load tap changer problems.

Insulation Power Factor

Better known as the “DOBLE Test”, IPF or insulation power factor test is the most comprehensive measurement of insulating properties of a power transformer or any apparatus with a winding. Elements such as deterioration, contamination, moisture, and heat can breakdown dielectric strength. Insulation Power Factor Testing measures the dielectric losses due to leakage current thru the insulation.

Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Leakage Reactance

Also know as the Short Circuit Impedance Test, is a procedure that can be performed on a per-phase basis. This test can confirm Nameplate Impedance data, and detect winding deformation.

Partial Discharge

PD defined is a localized dielectric breakdown within a small portion of an electrical insulation system under stress of high voltage, which does not bridge the space between two conductors. Partial Discharge is not yet a complete failure of the insulation, however, it is an indication of what is to come. PD testing determines the presence, and locates PD activity within a system.

SFRA

Sweep Frequency Response Analysis is a powerful method to measure and evaluate the mechanical integrity of a power transformer’s core, winding, and clamping structures by measuring their electrical transfer functions over a wide frequency range.

Transformers Turn Ratio

This test can detect shorted turns in the windings or a defective tap changer. The Turns Ratio Test (TTR) will detect and confirm a difference in voltages between phases. This means, that your transformer is not operating up to the manufacturer’s specifications and is not producing proper output voltages. This is also an early indication of transformer failure. It can also be used for transformer acceptance testing when a new transformer is installed. This will also be a base line for future diagnostics.

Winding Resistance

Winding Resistance Test determines the I2R losses in the transformer, and as a benchmark for assessing possible damages in the field. As a routine test procedure, this procedure is used to determine abnormalities due to loose connections, broken strands of conductors, high contact resistance in tap changers, high voltage leads, and bushings.