Precision Current &
Potential Transformers
Built for India's Grid
JMD Electricals PVT LTD manufactures high-accuracy 11kV and 33kV instrument transformers — Current Transformers (CT) and Potential Transformers (PT) — conforming to IS & IEC international standards. Trusted by utilities, industries and EPC contractors across India.
Manufacturing
Range
Standards
Delivery
Complete Range of CT & PT Transformers
From 11kV Ring Core to 33kV Oil Cooled — every transformer manufactured to IS & IEC accuracy standards for metering and protection applications.
Current Transformer
11kV R/C Current Transformer (CT)
Ring Core type 11kV Current Transformer for indoor metering and protection. Designed for revenue metering in substations and HT connections.
- Accuracy Class: 0.2, 0.5, 1.0, 5P10, 5P20
- Indoor / Outdoor Mounting
- Conforms to IS 2705 & IEC 61869-2
- Single & Multi-Core Available
Potential Transformer
11kV R/C Potential Transformer (PT)
11kV Resin Cast Potential Transformer for accurate voltage measurement in metering cubicles. Used extensively in DISCOMS and industrial substations.
- Accuracy Class: 0.2, 0.5, 1.0, 3P
- Secondary Voltage: 110V / √3
- Conforms to IS 3156 & IEC 61869-3
- Cast Resin / Epoxy Insulated
LT Transformer
LT Current Transformer (LTCT)
Low Tension Current Transformers for energy metering at 415V / 0.433kV systems. Widely used in industrial panels, LT boards and distribution metering.
- Voltage: 415V / 0.433kV
- Accuracy Class: 0.2S, 0.5, 1.0
- Conforms to IS 2705 Part-1
- Bar Primary & Window Type
33kV — Flagship Product
33kV R/C Single Phase CT & PT | Oil Cooled CT PT
Our flagship 33kV instrument transformers — available as Resin Cast Single Phase and Oil Cooled outdoor types. Designed for 33kV substations, grid metering, and EHV protection applications. Fully type-tested and compliant with IS & IEC norms.
- Voltage Class: 33kV / 36kV highest system voltage
- Oil Cooled (Outdoor) & Resin Cast (Indoor) types
- CT Accuracy Class: 0.2, 0.5, 5P10, 5P20, 10P10
- PT Secondary: 110V, 110V/√3 | Accuracy: 0.2, 0.5, 3P
- Short Time Withstand: 25kA / 1 sec
- Impulse Withstand: 170kVp (33kV class)
Why Utilities & Industries
Choose Us
Over 15 years of experience manufacturing precision instrument transformers for India's power sector. Our CT and PT transformers power metering and protection systems across DISCOMS, industrial plants, and EPC projects.
IS & IEC Certified Manufacturing
All transformers manufactured to IS 2705, IS 3156, IEC 61869-2 & IEC 61869-3. Type tested for accuracy, insulation, and dielectric performance.
In-House Factory Manufacturing
Complete in-house production in Faridabad, Haryana — from core winding and casting to testing and dispatch. No outsourcing of critical components.
High Accuracy Classes Available
0.2S, 0.2, 0.5, 1.0 for revenue metering; 5P10, 5P20, 10P10 for protection — ensuring precise measurement in all grid conditions.
Pan India Supply & Fast Delivery
We supply 11kV and 33kV CT & PT transformers to all major states across India. Competitive pricing with quick turnaround for urgent project requirements.
CT & PT Transformers
Voltage Range
Class Available
Standards Compliant
Network
From Order to Delivery —
How We Work
A streamlined manufacturing process that ensures every CT and PT transformer meets your exact specifications before it leaves our facility.
Enquiry & Specification
Share your technical requirements — voltage class, CT ratio, accuracy class, burden, and application.
Design & Quotation
Our engineering team prepares the design as per IS/IEC standards and provides a competitive quotation.
Manufacturing
In-house production at our Faridabad factory — core winding, casting, assembly, and oil filling for outdoor types.
Testing & QC
Every transformer is tested for ratio, burden, insulation, and dielectric performance before dispatch.
Delivery & Support
Safe packaging, test certificates, and prompt delivery across India. After-sales support included.
Precision Instrument Transformer
Manufacturer in India
JMD Electricals PVT LTD is a dedicated manufacturer of Current Transformers (CT) and Potential Transformers (PT) based in Faridabad, Haryana. With over 15 years of expertise in instrument transformer manufacturing, we supply 11kV and 33kV CT & PT units to DISCOMS, power utilities, industrial plants, and EPC contractors across India.
Our product range — including Ring Core CT, Oil Cooled CT PT, LT Current Transformers, and Single Phase 33kV transformers — is manufactured in our fully equipped factory, with rigorous quality checks to IS 2705, IS 3156, IEC 61869 standards.
ISO Certified Quality Management
Consistent quality processes ensuring every unit meets the defined accuracy class and insulation requirements.
In-House Testing Laboratory
Ratio verification, burden testing, power frequency withstand, and insulation tests done in-house before dispatch.
Direct Manufacturer — No Middlemen
Buy directly from the manufacturer. Competitive pricing, technical support, and custom specifications available.
Manufactured to International Standards
Current Transformers
Indian Standard for Current Transformers — Parts 1 to 4 covering general requirements, accuracy, special purpose CT, and protective CT.
Potential Transformers
Indian Standard for Voltage/Potential Transformers covering measuring and protective PT accuracy classes and construction.
Current Transformer (IEC)
International standard for instrument transformers — specific requirements for current transformers including accuracy class and burden.
Voltage Transformer (IEC)
IEC standard for inductive voltage transformers (Potential Transformers) for metering and protection class accuracy.
What Our Clients Say
Trusted by power utilities, EPC contractors, and industrial clients across India for quality CT & PT transformers.
We procured 11kV CT PT units from JMD Electricals for our substation metering cubicle project. The accuracy class 0.5 units were within spec and the test certificates were provided on time. Good quality at competitive pricing.
JMD Electricals supplied 33kV oil cooled CT and PT for our industrial substation. The units were properly type-tested and delivery was faster than expected. The team provided technical support throughout installation.
Reliable manufacturer for LT Current Transformers. We have been sourcing LTCT from JMD for our LT panels and the accuracy is consistently 0.5 class as required for our energy metering application. Recommended.