Current transformer

current transformer (CT) is a type of transformer that is used to reduce or multiply Alternating current(AC). It produces a current in its secondary which is proportional to the current in its primary.

Current transformers, along with voltage or potential transformers, are instrument transformers. Instrument transformers scale the large values of voltage or current to small, standardized values that are easy to handle for measuring instruments and protective relays. 

Current transformers are the current-sensing units of the power system and are used at generating stations, electrical substations, and industrial and commercial electric power distribution.

Function :

A current transformer has a primary winding, a core, and a secondary winding, although some transformers, including current transformers, use an air core. While the physical principles are the same, the details of a “current” transformer compared with a “voltage” transformer will differ owing to different requirements of the application. A current transformer is designed to maintain an accurate ratio between the currents in its primary and secondary circuits over a defined range.

A current transformer has a primary winding, a core, and a secondary winding, although some transformers, including current transformers, use an air core. While the physical principles are the same, the details of a “current” transformer compared with a “voltage” transformer will differ owing to different requirements of the application. A current transformer is designed to maintain an accurate ratio between the currents in its primary and secondary circuits over a defined range.

The alternating current in the primary produces an alternating magnetic field in the core, which then induces an alternating current in the secondary. The primary circuit is largely unaffected by the insertion of the CT. Accurate current transformers need close coupling between the primary and secondary to ensure that the secondary current is proportional to the primary current over a wide current range. The current in the secondary is the current in the primary (assuming a single turn primary) divided by the number of turns of the secondary. In the illustration on the right, ‘I’ is the current in the primary, ‘B’ is the magnetic field, ‘N’ is the number of turns on the secondary, and ‘A’ is an AC ammeter.

Current transformers typically consist of a silicon steel ring core wound with many turns of copper wire as shown in the illustration to the right. The conductor carrying the primary current is passed through the ring. The CT’s primary, therefore, consists of a single ‘turn’. The primary ‘winding’ may be a permanent part of the current transformer, i.e. a heavy copper bar to carry current through the core. Window-type current transformers are also common, which can have circuit cables run through the middle of an opening in the core to providing a single-turn primary winding. To assist accuracy, the primary conductor should be centered in the aperture.

A- Indoor CT with Epoxy insulation up to 33KV https://www.apipl.co.in/mv-ct-metering.html

Burden and accuracy class as per IS Standard.

Is=5 or 1A Ith Upto 50KA

B-Oil cooled CT up to 33KV

Burden and accuracy class as per IS Standard.

Metering Cubicle

We provide the metering cubicle for accurate metering of energy & widespread activities. The metering cubicles are installed electrically in between the incoming supply point and the step-down transformer of consumer’s installation., with the following technical details: https://www.apipl.co.in/mv-ct-metering.html

AKANKSHA POWER AND INFRASTRUCTURE PVT. LTD.

We like to introduce, Akanksha Power and Infrastructure Pvt Ltd., (APIPL) is one of the leading companies in the field of electrical engineering, a single-window source offering turnkey solutions for your electrical needs starting from conceptualization to design, manufacturing, supply, installation, and commissioning.

Akanksha is an ISO 9001:2008 company and manufacturer of electrical panels pertaining to APFC, MCC, PCC, and VFD offering turnkey solutions for Electrical infrastructure up to 33 kV voltage level. As regards to the measurement, manufacturing Automatic Power factor correction relay and Multifunction meters and Current and Voltage transformer (CT-PT and RVT) up to 33 kV from its STATE OF THE ART manufacturing facilities/works located at Nashik, Maharashtra. The Company has been successful in managing Input-based Franchisee operation of a Rural Distribution Sub-division in NESCO, Odisha since 2010. The Company has also been executing EPC Capital Projects for loss reduction and adopted best practices in the Electricity distribution management adopting IT Techniques and tools in Meter-reading, Spot Billing, Performance monitoring, MIS and Energy Audit. M/s. Akanksha Power bagged the prestigious National Award from the Hon’ble Minister of Power & Coal, Govt. of India for meritorious performance in 2013-14 under the Rural Distribution Franchise segment.https://www.apipl.co.in/index.php

You may Buy from Weekooo