SERVICES
OIL ANALYSIS
Oil analysis is one of the most used predictive maintenance tools, it is able to generate a diagnosis by monitoring and evaluating the conditions of the fluids in your equipment. Producing increased performance and reliability, identifying problems and failures in advance.
Oil analysis is one of the most used predictive maintenance tools, it is able to generate a diagnosis by monitoring and evaluating the conditions of the fluids in your equipment. Producing increased performance and reliability, identifying problems and failures in advance.
PHYSICOCHEMICAL
The physical-chemical analysis determines the cooling capacity, insulation and aging status of mineral oil. The results obtained are compared with values established in ABNT norm. Values outside the specified limits indicate the need for thermo-vacuum treatment, replacement or regeneration of mineral oil.
The physical-chemical analysis determines the cooling capacity, insulation and aging status of mineral oil. The results obtained are compared with values established in ABNT norm. Values outside the specified limits indicate the need for thermo-vacuum treatment, replacement or regeneration of mineral oil.
DEGREE OF POLYMERIZATION
Conducting the degree of polymerization test on insulating papers (NBR / IEC 60450). It aims to evaluate the level of degradation of cellulosic insulation using a paper sample. Its result can be used as a tool to assess the level of aging and loss of useful life of transformers.
Conducting the degree of polymerization test on insulating papers (NBR / IEC 60450). It aims to evaluate the level of degradation of cellulosic insulation using a paper sample. Its result can be used as a tool to assess the level of aging and loss of useful life of transformers.
CHROMATOGRAPHIC ANALYSIS
It is the most appropriate current method of Analysis of gases generated in the transformer, the results of which greatly contribute to the detection of possible faults that are occurring or that may occur in the transformer, being quite different from the physicochemical analysis of the insulating oil.
Arc, corona and overheating are types of flaws that can be detected by chromatographic analysis before the problem can become more critical.
There are limit values that are adopted as a reference, but only being used as a parameter for diagnosis due to the influence of several factors such as:
– Initial concentration of gases;
– Compatibility of internal paint as insulating materials;
– Maximum voltage of the equipment;
– Service conditions (overload);
– Oil preservation system, among others;
But through periodic monitoring, we can analyze the evolution of these gases from the beginning of their operation and diagnosing a future failure in time.
Of the methods used for the interpretation of faults in the transformer we have:
DIAGNOSTIC METHOD BY KEY GAS
This method is based on the fact that when there is an incipient failure in evolution in the transformer, the concentration of gases associated with it exceeds the normal values of degradation of the insulation, of those established in laboratory tests.
DIAGNOSTIC METHOD FROM THE CONCENTRATIONS OF DISSOLVED GASES
This method analyzes the formation of gases in the insulating mineral oil through the relations stipulated in the NBR 7274 and NBR 7070 standards.
It is the most appropriate current method of Analysis of gases generated in the transformer, the results of which greatly contribute to the detection of possible faults that are occurring or that may occur in the transformer, being quite different from the physicochemical analysis of the insulating oil.
Arc, corona and overheating are types of flaws that can be detected by chromatographic analysis before the problem can become more critical.
There are limit values that are adopted as a reference, but only being used as a parameter for diagnosis due to the influence of several factors such as:
– Initial concentration of gases;
– Compatibility of internal paint as insulating materials;
– Maximum voltage of the equipment;
– Service conditions (overload);
– Oil preservation system, among others;
But through periodic monitoring, we can analyze the evolution of these gases from the beginning of their operation and diagnosing a future failure in time.
Of the methods used for the interpretation of faults in the transformer we have:
DIAGNOSTIC METHOD BY KEY GAS
This method is based on the fact that when there is an incipient failure in evolution in the transformer, the concentration of gases associated with it exceeds the normal values of degradation of the insulation, of those established in laboratory tests.
DIAGNOSTIC METHOD FROM THE CONCENTRATIONS OF DISSOLVED GASES
This method analyzes the formation of gases in the insulating mineral oil through the relations stipulated in the NBR 7274 and NBR 7070 standards.
PCB'S CONTENT ANALYSIS
Determination of PCB content (According to NBR 13882/2008). Biphenyl polychloride is a synthetic fluid that was used in the past as a dielectric and currently must be covered by environmental legislation. For that, the analysis must be performed and the equipment must be classified as contaminated or not contaminated.
Determination of PCB content (According to NBR 13882/2008). Biphenyl polychloride is a synthetic fluid that was used in the past as a dielectric and currently must be covered by environmental legislation. For that, the analysis must be performed and the equipment must be classified as contaminated or not contaminated.
FURFURALDEHYDE ANALYSIS
Determination of the concentration of furfuraldehyde and its derivatives in samples of insulating mineral oil by the high performance liquid chromatography method, in order to obtain data on the useful life of cellulosic insulation, making it possible to correlate with the degree of polymerization of the insulating paper.
Determination of the concentration of furfuraldehyde and its derivatives in samples of insulating mineral oil by the high performance liquid chromatography method, in order to obtain data on the useful life of cellulosic insulation, making it possible to correlate with the degree of polymerization of the insulating paper.
THERMOGRAPHIC INSPECTION
Thermographic inspection aims to prolong the operational efficiency of the systems, avoiding losses through anticipating the defect. Labor has high quality thermographic cameras that identify the heating points, thus preventing downtime in the production process. Detailed technical reports with photos are issued, identifying the points inspected, and the locations with heating. Labor uses a data collection application, which makes the service more efficient, and the generation of the report is practically automatic, thus helping companies that go through audits and pre-stops processes. The customer has an access point on our website, where he can check all the completed technical reports.
Thermographic inspection aims to prolong the operational efficiency of the systems, avoiding losses through anticipating the defect. Labor has high quality thermographic cameras that identify the heating points, thus preventing downtime in the production process. Detailed technical reports with photos are issued, identifying the points inspected, and the locations with heating. Labor uses a data collection application, which makes the service more efficient, and the generation of the report is practically automatic, thus helping companies that go through audits and pre-stops processes. The customer has an access point on our website, where he can check all the completed technical reports.
ULTRASOUND INSPECTION
The ultrasound inspection aims to identify partial discharges, electrical arcs and corona in the electrical system, through the noise level. This service can be performed without the need for disconnections. Once the defect is detected, the company can schedule a correction, thus avoiding unnecessary downtime.
The ultrasound inspection aims to identify partial discharges, electrical arcs and corona in the electrical system, through the noise level. This service can be performed without the need for disconnections. Once the defect is detected, the company can schedule a correction, thus avoiding unnecessary downtime.
