Quais são as práticas de teste de equipamentos elétricos mais eficazes durante paradas de manutenção?

Durante paradas de manutenção, é essencial realizar uma bateria abrangente de testes elétricos para avaliação de equipamentos. Incluem medições precisas de tensão, corrente, resistência, continuidade, isolamento, impedância, fator de potência, harmônicos e frequência. Recorre-se a instrumentos especializados, como multímetros, medidores, megômetros e analisadores de potência. A execução segue procedimentos e diretrizes normativas, e os resultados são comparados meticulosamente com valores esperados através de gráficos e parâmetros pré estabelecidos.

Effective electrical equipment testing during maintenance shutdowns is crucial to ensure the reliability and safety of the electrical systems. Here are some key practices for testing electrical equipment during maintenance shutdowns: Visual Inspection, Infrared Thermography, Electrical Testing, Circuit Breaker Testing, Transformer Testing, Grounding System Inspection, Protective Relay Testing, Load Bank Testing, Battery Testing, Documentation and Recordkeeping, Safety Precautions, Compliance with Standards. Regular and thorough testing during maintenance shutdowns helps identify and address potential issues before they lead to equipment failures. It is essential to follow a systematic approach, prioritize safety throughout testing process.

En el ámbito industrial Las paradas además de ser aprovechadas para realizar pruebas específicas. Se debe aprovechar para enfocar los esfuerzos y darle la preponderancia y lugar a la información que las técnicas de detección anticipada de fallas puedan aportar, a los fines de realizar los ajustes o recambios necesarios como también relevar los datos tendenciales en equipos críticos.

I am doing a test, I try to have these things with me; 1 _ Test device 2_ Software used by the equipment, data model (if the equipment requires a relay) 3_ Having the contact number of those who had the experience of doing this test 4 _ Having a past test file.

Clear method of statement, Risk analysis,check list and test forms with expected values as per criteria shall be available. Resource planning which includes manpower,tools,materials,spares, equipment and consumeables

Visual inspections, executed by means of periodic check lists, can provide very good and valuable primary information. Properly performed, with the correct frequency and conscientiously done, they provide information that, after being evaluated by maintenance specialists, can give early alerts to define the need of executing maintenance actions. This way, the use of the senses can be very useful. The detection of abnormally high or low temperatures, color changes, corrosion, existence of spills or low level of fluids, sound of discharges, corona, ozone smell or other similar anomalies are generally indicative of ongoing deterioration processes that should be carefully evaluated.

Electrical tests, both on-line or off-line, are in all cases predictive determinations that allow us to know the condition of the asset and reveal the possible existence of anomalous processes in progress. It results a key factor to properly identify the determination to be made on each asset, representative of its condition, which when possible, should arise from an Analysis of Failure Modes and their Effects (FMECA), and their execution frequencies,that must be related in all cases to their background and operational context.

One thing I was responsible for in a maintenance position was the emergency lighting. If it worked when there was a power loss and for how long the lighting lasted. The answer would tell us weather the batteries were good or if they should be replaced.

Functional verifications are valuable to identify hiddden faults affecting some function of any device. They help to verify the condition of redundant systems, protecting devices and automatism systems. A typical case is a system with 2 pumps, a main one and a backup one. If the backup has a hidden fault, this will be detected just when, in case of failure of the main pump, the backup has to operate; periodic functional verifications help to early detect this situation. Another examples could be a faulty Buchholz relay, this will be detected when in case of having to trip for a transformer fault, it is not able to do it. The same for a faulty maximal relay, this will be detected only when in case of having to operate, it cannot do it

Troubleshooting is where you find the problem whether it is a component fault, lost connections, a programming error, a short circuit, or other issues. Troubleshooting help find issues.

Troubleshooting is where you find the problem whether it is a component fault, lost connections, a programming error, a short circuit, or other issues. Troubleshooting help find issues.

Documenting your work means taking notes and pictures of your project once you build it. This will help you to note your progress and troubleshoot any issues that arise.