An Open Circuit Test is one of the most essential procedures used to determine the efficiency and performance of electrical transformers. It helps engineers measure core losses, magnetizing current, and no-load parameters without loading the transformer. This test ensures that the transformer operates efficiently and safely under real-world conditions. In Bangladesh, the demand for reliable Open Circuit Test Service has grown rapidly, especially in industries related to power, energy, and manufacturing.
The main goal of the Open Circuit Test is to find out how much energy is consumed by the transformer core when it operates without load. It provides crucial data about:
Core losses (iron losses) in the transformer
Magnetizing current required to energize the core
Voltage ratio verification
Efficiency and performance estimation
These results are vital for ensuring that transformers used in power plants, substations, and industries are performing at their optimum level.
During an Open Circuit Test, one winding of the transformer (usually the low-voltage side) is left open, while the other winding (usually the high-voltage side) is connected to a standard voltage source. The test measures input voltage, current, and power to determine the losses that occur in the core.
The readings obtained from voltmeters, ammeters, and wattmeters are then used to calculate the:
Core loss (no-load loss)
Magnetizing reactance
Core resistance
This method is cost-effective, safe, and provides accurate data without applying a full load to the transformer.
Bangladesh’s energy and industrial sectors are growing rapidly, leading to an increased need for precise electrical testing and inspection services. Reliable Open Circuit Test Service in Bangladesh ensures that transformers installed in factories, substations, and renewable energy setups operate efficiently and safely.
Without proper testing, transformers can suffer from overheating, reduced efficiency, and costly power losses. Therefore, conducting an Open Circuit Test helps:
Improve transformer performance
Reduce power loss and downtime
Ensure safety and reliability in electrical systems
Comply with international testing standards
Pico Labs Ltd. is a trusted name in Testing & Inspection Services across Bangladesh. We specialize in Electrical Equipment Calibration and Transformer Testing, providing precise and reliable results for industrial and power sector clients.
Here’s why Pico Labs Ltd. stands out:
Advanced testing instruments and certified technicians
Accurate data analysis following IEC and IEEE standards
On-site testing capability for large-scale transformers
Comprehensive test reports with detailed performance insights
Affordable service packages for industries and power utilities
Whether you operate a power generation plant, industrial facility, or renewable energy setup, Pico Labs Ltd. ensures your electrical equipment meets top efficiency and safety standards.
Our Open Circuit Test Service in Bangladesh is widely used in:
Power distribution substations
Industrial transformer testing
Renewable energy systems (solar and wind power plants)
Electrical maintenance and inspection programs
Research and educational institutions
These services play a vital role in ensuring reliable power delivery and efficient energy management across various sectors.
An Open Circuit Test is a key step in evaluating the health and efficiency of transformers. It ensures that the core losses are minimal and that the system performs optimally. For industries in Bangladesh seeking accurate and professional testing solutions, Pico Labs Ltd. offers the most trusted Open Circuit Test Service in Bangladesh with top-quality equipment, skilled engineers, and timely service delivery.
Maintain the performance of your transformers and ensure the reliability of your power systems—partner with Pico Labs Ltd., your trusted testing and inspection expert in Bangladesh.