Top 10 Questions for Electrical High Tension Tester Interview

1. Describe the types of electrical high tension tests and their applications?

• AC withstand voltage test: This test is used to determine the voltage that an electrical component can withstand without breaking down. It is typically applied to insulators, surge arresters, and transformers.
• Impulse voltage test: This test is used to determine the voltage that an electrical component can withstand without damage when subjected to a sudden surge of voltage. It is typically applied to transformers, switchgear, and power lines.
• Corona discharge test: This test is used to detect the presence of corona discharge, which is a type of electrical discharge that occurs when the voltage gradient in a gas exceeds the breakdown voltage of the gas. It is typically applied to insulation and high-voltage equipment.

2. Explain the procedure for carrying out an AC withstand voltage test?

Procedure:

• Connect the test object to the high voltage test set.
• Apply the test voltage to the test object and gradually increase the voltage until the desired test voltage is reached.
• Maintain the test voltage for the specified duration of the test.
• Record the leakage current and any other relevant data during the test.
• After the test is complete, gradually reduce the voltage to zero and disconnect the test object from the test set.

3. What are the safety precautions that should be taken when conducting high tension testing?

• Wear appropriate personal protective equipment (PPE), including rubber gloves, safety glasses, and a hard hat.
• Ensure that the test area is clear of any flammable materials or combustible gases.
• Ground the test object and all test equipment properly.
• Use proper shielding and barriers to protect personnel from exposure to high voltage fields.
• Never work alone when conducting high tension testing.

4. Describe the different types of high tension test equipment and their applications?

• High voltage test sets: These are used to generate the high voltages required for testing. They can be either AC or DC.
• Insulation testers: These are used to measure the resistance of insulation materials. They can be either analog or digital.
• Corona discharge detectors: These are used to detect the presence of corona discharge. They can be either handheld or stationary.
• High voltage probes: These are used to measure the voltage in high voltage circuits. They can be either capacitive or resistive.

5. Explain the importance of calibration and maintenance of high tension test equipment?

• Calibration ensures that the test equipment is accurate and reliable.
• Maintenance ensures that the test equipment is in good working condition and safe to use.
• Regular calibration and maintenance can prevent accidents and ensure the validity of test results.

6. What are the common problems encountered during high tension testing and how can they be resolved?

• Arcing: This can be caused by loose connections, improper grounding, or insulation failure. It can be resolved by tightening connections, ensuring proper grounding, and replacing failed insulation.
• Overheating: This can be caused by excessive current, high voltage, or poor ventilation. It can be resolved by reducing current, lowering voltage, or improving ventilation.
• Corona discharge: This can be caused by sharp edges, high voltage gradients, or contamination. It can be resolved by smoothing edges, reducing voltage gradients, or cleaning contamination.

7. Describe the different methods used for interpreting high tension test results?

• Pass/fail criteria: This is the simplest method, where the test results are compared to a predetermined pass/fail threshold.
• Trend analysis: This method involves tracking the test results over time to identify any trends that may indicate a potential problem.
• Statistical analysis: This method uses statistical techniques to analyze the test results and identify any significant deviations from the norm.

8. Explain the importance of documentation in high tension testing?

• Documentation provides a record of the test procedure, test results, and any relevant observations.
• It can be used to identify trends, troubleshoot problems, and support quality control.
• Proper documentation is essential for meeting regulatory requirements and maintaining traceability.

9. Describe the different types of reports that are typically generated after high tension testing?

• Test reports: These reports provide a detailed summary of the test procedure, test results, and any relevant observations.
• Failure analysis reports: These reports are generated when a test object fails to meet the specified requirements. They include a detailed analysis of the failure and recommendations for corrective action.
• Trend analysis reports: These reports summarize the test results over time and identify any trends that may indicate a potential problem.

10. Explain the role of quality control in high tension testing?

• Quality control ensures that the test procedures are followed correctly and that the test results are accurate and reliable.
• It involves the implementation of quality control measures, such as calibration of test equipment, training of personnel, and documentation of test procedures.
• Quality control is essential for ensuring the validity of test results and maintaining the integrity of the testing process.

Electrical High Tension Testers play a crucial role in ensuring the safety and reliability of electrical equipment by conducting high-voltage tests to identify potential defects or failures.

1. High-Voltage Testing

Perform high-voltage tests on electrical equipment, such as transformers, switchgear, and cables.

• Adhere to established test procedures and industry standards.
• Use specialized equipment, such as high-voltage transformers and oscilloscopes.

2. Data Analysis and Interpretation

Analyze test data to identify any irregularities or deviations.

• Interpret test results and prepare reports.
• Recommend appropriate corrective actions or further testing.

3. Equipment Maintenance and Calibration

Maintain and calibrate high-voltage testing equipment to ensure accuracy and safety.

• Follow established maintenance schedules.
• Troubleshoot and repair any equipment malfunctions.

4. Safety Compliance

Ensure compliance with all applicable safety regulations and protocols.

• Wear appropriate personal protective equipment (PPE).
• Follow established work procedures and safety guidelines.

To ace your interview for an Electrical High Tension Tester position, consider the following tips:

1. Research the Company and Role

Demonstrate your interest and enthusiasm by researching the company and the specific role.

• Visit the company’s website to learn about their mission, products, and culture.
• Review the job description thoroughly to understand the key responsibilities and qualifications.

2. Emphasize Relevant Experience and Skills

Highlight your previous experience in electrical testing, particularly in high-voltage applications.

• Quantify your accomplishments with specific examples and results.
• Discuss your proficiency in using high-voltage testing equipment and data analysis techniques.

3. Showcase Safety Consciousness

Emphasize your commitment to safety and compliance.

• Describe your experience in adhering to safety protocols and regulations.
• Explain your understanding of the importance of PPE and safe work practices.

4. Prepare for Technical Questions

Expect technical questions related to high-voltage testing and electrical equipment.

• Review basic electrical theory and high-voltage testing techniques.
• Practice answering questions about different types of electrical equipment and their testing procedures.

5. Practice Your Communication and Presentation Skills

Interviews often include a presentation or technical demonstration component.

• Practice presenting your qualifications and explaining technical concepts clearly.
• Prepare visual aids, such as slides or diagrams, to enhance your presentation.