AMREST manufactures single phase 33kV Current Transformers in single bushing and double bushing designs for metering and protection duties.

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AMREST is a manufacturer of 33kV Current Transformers for electrical metering and protection. Our CTs are built for use in substations, switchyards, electrical distribution systems, industrial projects and EPC projects across India.

We manufacture 33kV single phase single bushing and double bushing Current Transformers to customer and project specifications. CT ratio, number of cores, accuracy class and rated burden are defined with the buyer, based on the approved datasheet, single-line diagram or BOQ.

If you are an EPC contractor, consultant, utility or procurement team, send us your requirement. We will review it and respond with a technical and commercial offer.

What Is a 33kV Current Transformer?

A 33kV Current Transformer (CT) is an instrument transformer used on 33kV circuits. It reduces the large primary current flowing in the line to a much smaller, proportional secondary current that measuring and protective equipment can handle.

Why not connect meters and relays directly? Line currents at 33kV can be far too high for meters and relays, and those devices cannot be exposed to line voltage. A CT solves both problems. It scales the current down and provides electrical isolation between the high-voltage primary and the low-voltage secondary circuit.

How it works. The primary winding is connected in series with the line. The secondary winding delivers a current in a fixed ratio to the primary current, commonly to standard secondary values defined in the project specification.

A 33kV CT serves three main roles:

• Metering: feeds energy meters used for billing and energy accounting
• Protection: feeds relays that detect overloads and faults and initiate tripping
• Monitoring: feeds ammeters, power analysers and SCADA inputs for load and performance tracking

Each role has different accuracy and performance requirements, so the CT must be specified for the duty it will perform.

33kV Single Phase Single Bushing Current Transformer

The 33kV Single Bushing Current Transformer is a single phase unit built around a single bushing primary arrangement. AMREST manufactures it for metering and protection applications on 33kV networks.

Construction. Single phase unit with a single bushing primary arrangement, insulated for 33kV class service, with secondary terminals for the required cores. Exact construction details follow the approved product drawing.

Metering and protection use. The CT can be built with metering cores, protection cores or a combination, depending on the number of cores and classes specified.

Typical installations

• Incoming and outgoing feeder bays
• Transformer bays in substations
• Switchyards and outdoor 33kV structures
• Industrial 33kV distribution points
• Renewable energy collector substations

Benefits for buyers

• Suitable for both metering and protection duties
• Ratio, cores, class and burden can be defined per project
• Datasheet-based manufacturing for approval-driven EPC projects

Project customisation. Primary current, secondary current, cores, accuracy classes, burden, terminal arrangement and mounting details are finalised as per customer/project requirement.

Enquire for Single Bushing CT on WhatsApp

33kV Single Phase Double Bushing Current Transformer

The 33kV Double Bushing Current Transformer is a single phase unit with a double bushing primary arrangement. AMREST manufactures it for 33kV metering and protection applications where the project layout or connection method calls for this configuration.

Product design. Single phase unit with a double bushing primary arrangement, insulated for 33kV class service, with secondary terminals for the specified cores. Final construction follows the approved drawing.

Typical application. Substations, switchyards, feeder circuits and industrial networks where the primary connection is planned around the double bushing arrangement.

Connection flexibility. The double bushing arrangement gives the designer a defined primary terminal layout to work with. Whether it suits your installation depends on your busbar or conductor arrangement. Share the layout drawing and we will help confirm the configuration.

Metering and protection use. Metering cores, protection cores or both can be provided as per the specification.

Custom manufacturing. CT ratio, cores, accuracy class, burden and mounting are agreed with the buyer before manufacturing.

Enquire for Double Bushing CT on WhatsApp

Single Bushing vs Double Bushing 33kV CT

Both types are single phase 33kV CTs and can be used for metering and protection. The choice usually depends on the project layout and the datasheet.

Selection should always follow the project datasheet and drawings. If your specification does not state the type, share your layout and our team will help confirm.

33kV Metering Current Transformer

A 33kV Metering Current Transformer supplies accurate current signals to energy meters and other measuring instruments.

Purpose. To reproduce the primary current faithfully at normal operating loads, so that energy consumption and load data are recorded correctly.

Metering applications

• Revenue and tariff metering at incomer and feeder points
• Energy audit and internal sub-metering
• Trivector and multifunction meters
• Power analysers and load monitoring systems
• SCADA and energy management inputs

Accuracy requirements. Accuracy class is set by the metering requirement of the utility or the project. It is defined as per application and customer/project specification. Burden should also be matched to the meter and the connected wiring.

Utility and industrial use. Utilities specify metering CTs for billing points, while industries use them for incomer metering, cost allocation and energy management.

Enquire for Metering CT on WhatsApp

33kV Protection Current Transformer

A 33kV Protection Current Transformer supplies current signals to protective relays. Its job is to stay dependable when the current in the circuit is far above normal, as it is during a fault.

Protection relay applications

• Overcurrent and earth fault relays
• Differential protection schemes
• Directional and distance relays, where applicable
• Busbar protection, where applicable

Where it is used

• Fault current monitoring: supplies the relay with the fault current signal
• Transformer protection: feeds relays on transformer bays
• Feeder protection: covers incoming and outgoing 33kV feeders
• Switchgear protection: supports protection of 33kV switchgear and panels
• Substation applications: bay and bus protection

Protection class, burden and other performance requirements depend on the relay type, fault level and scheme, and are defined as per customer/project requirement.

Enquire for Protection CT on WhatsApp

33kV Current Transformer Technical Specification

Detailed ratings, standards and test documentation are confirmed in the technical offer and approved datasheet for each project.

Applications of 33kV Current Transformers

Electrical Substations

Used on feeders, transformer bays and bus sections for metering and protection.

Switchyards

Support bay protection, line monitoring and control interfaces in outdoor 33kV yards.

Power Distribution Systems

Provide current measurement for load management, fault detection and loss analysis on 33kV distribution networks.

Industrial Power Networks

Used at plant incomers and internal 33kV feeders for metering, protection and energy monitoring.

Transformer Protection

Feed relays that protect power and distribution transformers connected at 33kV.

Switchgear

Fitted in or alongside 33kV switchgear for measurement and protection of feeders.

Utility Projects

Support revenue metering, feeder protection and network monitoring on utility 33kV systems.

Solar Power Projects

Used at collector substations and evacuation points for metering and protection.

Wind Energy Projects

Support metering and protection on 33kV collector circuits and pooling stations.

Renewable Energy Substations

Provide accurate measurement and relay inputs where generation is stepped up for evacuation.

EPC Infrastructure Projects

Supplied against approved datasheets and BOQs for turnkey electrical infrastructure.

Customised 33kV Current Transformer Manufacturer

Every project has its own requirements, so we manufacture 33kV CTs around the specification you provide. You can specify:

• CT ratio and primary current
• Secondary current
• Metering core: accuracy class and burden
• Protection core: protection class and burden
• Number of cores
• Rated burden for each core
• Single bushing or double bushing
• Project requirements: mounting, terminals, documentation and delivery

Send your technical datasheet or BOQ. If you already have an approved specification, share it. We will review it against the design and confirm what can be supplied. If parts of the specification are still open, our team can help you close them before you finalise the order.

Why Choose AMREST?

Instrument transformers are specified, not chosen from a shelf. What matters is that the manufacturer understands the specification and delivers to it. That is how we work.

• Project-specific manufacturing: CTs built around your datasheet
• Technical requirement-based production: ratio, cores, class and burden confirmed before manufacture
• Metering and protection options: separate or combined cores as required
• Single and double bushing configurations: both available
• Customised CT ratios: as per project requirement
• B2B project support: technical clarifications and quotation support
• EPC requirements: datasheet, BOQ and quantity-based enquiries welcome
• Domestic supply: enquiries from buyers across India
• Export and project enquiries: discussed on a case-by-case basis

We also work with related equipment such as 11kV current transformers, 11kV and 33kV potential transformers, distribution transformers and power transformers, which helps when a project needs matched instrument transformers and transformers from one source.

33kV Current Transformer Manufacturer for EPC Projects

EPC projects run on approved datasheets, drawings and delivery schedules. AMREST supports:

• EPC contractors
• Electrical consultants
• Utilities
• Industrial buyers
• Electrical distributors
• Infrastructure companies
• Procurement departments

How to enquire

1. Send BOQ or CT schedule
2. Request technical offer against your datasheet
3. Request commercial quotation with project quantity
4. Share delivery requirement and site location

For bulk requirement enquiries, mention the total quantity and any phased delivery schedule so that we can respond with realistic project pricing.

33kV Current Transformer Supplier Across India

Buyers from any region of India can submit an enquiry for a 33kV CT supplier requirement. Whether the project is a utility substation, an industrial plant or a renewable energy site, send your specification and delivery location. We will confirm supply and dispatch details for the project.

33kV Current Transformer Export Enquiries

International buyers and overseas project teams can also send their requirements. Please share:

• Destination country
• Applicable technical standards
• Required documentation
• Quantity and delivery timeline

Export enquiries are reviewed individually against the specification and order terms.

33kV Current Transformer Price in India

There is no single 33kV CT price, because the cost depends on the specification. The main factors are:

• CT ratio and primary current
• Number of cores and accuracy classes
• Rated burden
• Single or double bushing type
• Quantity and delivery schedule
• Documentation and project requirements

To get a quotation for a 33kV CT, or to buy a 33kV Current Transformer for a project, send the parameters above or your datasheet. We will respond with project pricing.

Need a 33kV Current Transformer for Your Project?

Send us the following, as far as available:

1. Required CT ratio
2. Quantity
3. Accuracy class
4. Number of cores
5. Rated burden
6. Single or double bushing
7. Metering or protection application
8. Project location
9. Required delivery timeline
10. Technical specification / BOQ

Get 33kV CT Quote  |  Request Technical Datasheet  |  Send Requirement on WhatsApp  |  Submit Your BOQ  |  Request Project Pricing

Frequently Asked Questions

What is a 33kV Current Transformer?

It is an instrument transformer for 33kV circuits that reduces high primary current to a proportional, lower secondary current for meters and relays.

What is the purpose of a 33kV CT?

A 33kV CT enables safe and accurate current measurement, energy metering and relay protection, and isolates instruments from the high-voltage line.

Who manufactures 33kV Current Transformers in India?

Several manufacturers make them. AMREST manufactures 33kV single phase single bushing and double bushing Current Transformers for metering and protection to customer specifications.

What is a single bushing Current Transformer?

It is a CT with a single bushing primary arrangement. Its exact construction follows the approved product drawing for the project.

What is a double bushing Current Transformer?

It is a CT with a double bushing primary arrangement, used where the project layout and connection method call for it.

What is the difference between single and double bushing CT?

The difference is in the primary bushing construction and connection arrangement. Choice depends on the layout, datasheet and installation requirements.

What is a metering CT?

A metering CT feeds energy meters and measuring instruments, and is specified for accuracy at normal load current.

What is a protection CT?

A protection CT feeds relays and is specified to stay dependable at high fault currents, so that protection operates correctly.

Can 33kV CT ratios be customised?

Yes. Ratio, cores, accuracy class and burden can be customised as per customer/project requirement.

What information is required to request a quotation?

CT ratio, quantity, accuracy class, number of cores, rated burden, single or double bushing, metering or protection use, project location and delivery timeline. A datasheet or BOQ is helpful.

Where are 33kV Current Transformers used?

In substations, switchyards, distribution networks, industrial plants, utility projects, solar and wind projects, and EPC infrastructure projects.

Can AMREST support bulk/EPC project requirements?

Yes. Send your BOQ, datasheet and quantity, and we will respond with a technical and commercial offer.

Can customers submit their own CT specifications?

Yes. Customers can send their own datasheet, single-line diagram or CT schedule, and we will review it before quoting.

Can AMREST handle export/project enquiries?

Yes. Export and international project enquiries are welcome. Share the destination country, standards, documents and quantity for review.