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
  • 91-141-2771849 / 91-8003095302
  • infocicpl@gmail.com
  • Mon - Sat: 9:00 am - 6:00 pm

Zero Phase Sequence Impedance :-

Zero-sequence current and voltage values are important quantities to provide proper relay protection of power lines and substation equipment. Zero-sequence quantities having any real significance generally occur only when a power system becomes unbalanced due to non symmetrical power loading or because of a fault.

For a three-phase power system, zero-sequence current flows when one or two phases are faulted to ground. The correct operation of ground relays requires proper zero-sequence relay current and (for directional relays) polarizing quantities during the fault.

Delta-wye transformers with grounded wye neutrals are the major sources of zero sequence-current flow within a power system. Depending on a transformer’s configuration, zero-sequence currents can flow through the transformer, from the transformer, or both.

To describe zero-sequence impedance testing on a transformer, a grounded wye (sometimes called a star configuration) connection is used. Zigzag transformers are tested for zero-sequence impedance by the same test connections. 

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.”