M/s C and I Calibrations Pvt. Ltd, is a NABL Accredited Calibration and Testing Laboratory. The prime aim of this unit is to provide solution in managing calibration and Testing looking to the needs of the various industries in this region govt. organizations and private sectors.

  • J-448, Sitapura Industrial Area, Jaipur-302022 (Raj.) India
  • +918003095304 / 91-8003095302
  • infocicpl@gmail.com
  • Mon - Sat: 9:00 am - 6:00 pm

Harmonics of No-Load Current in Transformer –

Harmonic Analysis of No-Load Current in distribution transformers. Applying a sinusoidal voltage to a distribution transformer results in a non-sinusoidal magnetizing current due to the non-linear relationship between magnetizing force H and flux density B, also known as magnetizing curve. The harmonic components of the no-load current are influenced by many factors. These factors are the flux density, the degree of saturation and the core stacking technique. This paper tested many transformers for the no-load current and its harmonic components. A slight over-excitation results in a substantial increase of the THD level. The increase in the THD is not linear with the flux density. Also this work has demonstrated that having a lower no-load current should not be an indication of lower harmonics. The simulation of the transformer through the use of nonlinear inductors and resistors provided reasonable accuracy.

Applying a sinusoidal voltage to a distribution transformer results in a non-sinusoidal magnetizing current due to the non-linear relationship between magnetizing force H and flux density B, also known as magnetizing curve. Although the no-load current in modern transformers is very low (0.1-0.5% of the rated current), it is generally responsible for the no-load losses. Considering thenumber of distribution transformers connected to the power grid, these no-load losses are constantly generated regardless of the transformer’s load, thus introducing significant energy consumption.  This presents the measurements of voltage and current harmonics, conducted for several three-phase distribution transformers with different rated apparent power and same voltage level, operating at no-load conditions.

Our Power and Distribution Transformer Test Laboratory is NABL Accredited & BIS Recognized Laboratory.

Our lab is well equipped, meeting National/ International Standards and accredited by NABL (National Accreditation Board for Testing & Calibration Laboratories) under Dept. of Science & Technology (DST), Govt. of India, New Delhi.

What Is Included

We have included 4 business. These business are below:

Transformer Testing Laboratory

We have NABL Accredited & BIS Recognized Power & Distribution Transformer Test Lab. Transformer Tests – As per Is: 1180/ IS: 2026. are Routine Test, Type Test, special Test, Other Test, Lightning Impulse Test on Insulator, Bushing, Current Transformer and Potential Transformer.

CI Proficiency Training Provider

The CIPTPL provides dedicated and quality Proficiency Testing Services to its participants. CIPTPL has set up management systems based on ISO/IEC 17043 for this purpose and continually improves upon the effectiveness of the system based on the experience gained in the process.

World Precious Calibration Laboratory

C and I Calibrations Private Limited was established in 1995.C&I is having State of the art NABL Calibration Accredited Laboratories at Kota and Jaipur. We are also having facilities for Mechanical Calibration, Thermal Calibration, Fluid Flow Calibration & Electro-technical calibration.

Building Material Testing Laboratory

C & I Systems is a NABL Accredited Civil Testing Laboratory as per ISO/IEC 17025:2005. Samples are tested here- Soil, Rock, Stone, Water, Steel, Aggregate, Cement, Concrete, CC Cube, Tiles, Brick, Bitumen, Sand, Interlocking Block, Mix Design, Bitumen Mix Design, Chemical and Mechanical Testing Both. etc.

Why Choose This Service

There are no secrets to success. It is the result of preparation, hard work, and learning from failure. So Great things in business are never done by one person. They’re done by a team of people.

Happiness does not come from doing easy work but from the afterglow of satisfaction that comes after the achievement of a difficult task that demanded our best.

“A customer is the most important visitor on our premises. He is not dependent on us. We are dependent on him. He is not an interruption in our work. He is the purpose of it. He is not an outsider in our business. He is part of it. We are not doing him a favor by serving him. He is doing us a favor by giving us an opportunity to do so.”