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Testing of energy meters, CTs and PTs involves verifying their accuracy and functionality.
Energy meters are tested to ensure they measure energy consumption accurately.
CTs (Current Transformers) are tested to verify their current ratio and accuracy.
PTs (Potential Transformers) are tested to verify their voltage ratio and accuracy.
Testing may involve simulating different load conditions and measuring the output.
Calibrat...
Energy meter can be tested on line mode at site using a portable test equipment.
Use a portable test equipment to simulate the load and measure the output of the energy meter.
Ensure that the test equipment is calibrated and accurate.
Perform the test during normal operating conditions to get accurate results.
Compare the readings with the manufacturer's specifications to determine if the energy meter is functioning proper...
CT can be tested at site with load condition using a test kit and a load bank.
Use a test kit to measure the CT ratio and polarity
Connect the CT to a load bank to simulate load conditions
Measure the output voltage and current of the CT under load
Compare the measured values with the CT specifications
Repeat the test for different load conditions
Ensure safety precautions are taken during the test
PT can be tested at load condition by applying the load and measuring the voltage and current.
Apply the load to the PT
Measure the voltage and current using appropriate instruments
Calculate the power factor and accuracy of the PT
Ensure that the PT is within the acceptable limits of error
Repeat the test at different load conditions to ensure accuracy
Over current relay is set based on the load current and time characteristics.
Determine the maximum load current and time characteristics
Select the appropriate over current relay type and current rating
Calculate the relay settings based on the load current and time characteristics
Adjust the settings to ensure proper coordination with other protective devices
Test the relay to ensure proper operation
I applied via Campus Placement and was interviewed before Apr 2019. There was 1 interview round.
I applied via Naukri.com and was interviewed before Jun 2020. There was 1 interview round.
MCB components are typically made of materials such as copper, silver, thermoplastics, and ceramics.
Copper is commonly used for conducting electricity in MCBs.
Silver is sometimes used as a contact material for better conductivity.
Thermoplastics like polyamide are used for insulation and housing of MCB components.
Ceramics are used for arc chutes to extinguish the arc when the MCB trips.
Other materials like steel, brass,...
posted on 24 Apr 2021
I applied via Naukri.com and was interviewed before Apr 2020. There were 3 interview rounds.
I applied via Recruitment Consultant and was interviewed in Dec 2021. There was 1 interview round.
posted on 5 Nov 2023
I applied via Naukri.com and was interviewed in May 2023. There were 3 interview rounds.
Electrical testing for equipment involves verifying functionality and safety through various tests.
Perform insulation resistance tests to check for any leakage currents
Conduct continuity tests to ensure proper electrical connections
Verify voltage and current ratings are within acceptable limits
Test for proper grounding to prevent electrical hazards
Use specialized equipment like multimeters and insulation testers
Documen
Different cable types have varying current carrying capacities and methods of laying, impacting overall electrical system performance.
Different cable types such as PVC, XLPE, and rubber have different current carrying capacities.
Current carrying capacity is influenced by factors like conductor size, insulation material, and ambient temperature.
Methods of laying cables include direct burial, conduit installation, and ov...
posted on 23 Sep 2022
I applied via Walk-in
I applied via Newspaper Ad and was interviewed in Jun 2023. There were 2 interview rounds.
To reduce resistance in a transformer, one can use low resistance materials, increase the cross-sectional area of the winding, and minimize the length of the winding.
Use low resistance materials for the transformer windings
Increase the cross-sectional area of the winding to reduce resistance
Minimize the length of the winding to reduce resistance
Ensure proper insulation to avoid any short circuits
Maintain proper cooling
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