Name: Toroidal Current Transformers
Brand: Torotrans

Precision OEM Toroidal Current Transformers

Established in 1994, Torotrans is an ISO 9001:2015 certified manufacturer, supplier, and global exporter of high-accuracy Toroidal Current Transformers (CTs) located in Pune, Maharashtra, India. Engineered for low tension (LT) applications, our CTs feature ultra-low phase displacement, minimal core loss, and robust thermal endurance.

Whether required for switchgear assemblies, electrical control panels, energy meters, or motor protection relays, our CT series—ranging from Resin Cast Measuring CTs to Tape Insulated Protection CTs—are built to conform strictly with international standards such as IEC 61869-2 and IS 2705.

Catalog Overview

Featured CT Models & Variants

Explore our standardized toroidal current transformer series available in encapsulated box, resin-cast, and ring-type designs.

TORO-BOX-30X35-BP

TORO-BOX-75X75P-4M-L12

TORO-OMEGA-55

TORO-OMEGA-70

TORO-RING-32

TORO-TW-C Series

Engineering Parameters

General Technical Specifications

Technical Parameter	Standard Specification Range
Primary Current Rating	5A to 4000A (Custom ratios available on request)
Secondary Current Rating	1A or 5A
Accuracy Class	0.2, 0.2S, 0.5, 0.5S, 1.0 (Metering) / 5P10, 10P10, PS Class (Protection)
Rated Burden	1.5 VA to 30 VA
Core Material	High-permeability Grain Oriented Silicon Steel (CRGO) / Nanocrystalline Cores
Insulation Class	Class E & Class B (up to 660V RMS system voltage)
Encapsulation Type	Polycarbonate Box Shell, Flame Retardant Resin Cast, or Polyester Film Tape Insulated
Compliance Standards	IEC 61869-1/2, IS 2705, BS 7626, ERDA Tested

Quality Assurance

Why Global Procurement Teams Trust Torotrans CTs

Superior Magnetic Geometry

The seamless ring-core construction minimizes flux leakage, preventing external magnetic field interference in dense panel layouts.

ERDA Type-Tested Performance

Extensive type tests verified by ERDA certify our current transformers for thermal short-time current withstand and ratio/phase limits.

Fully Custom OEM Solutions

Tailored window dimensions, secondary lead lengths, mounting brackets, and specialized burden/accuracy requirements tailored for your equipment.

Global Export Logistics

Export-grade protective packaging and compliance documentation streamlined for overseas equipment manufacturers across 30+ countries.

Need Custom Current Transformer Specifications?

Our engineering team assists OEM engineers and international sourcing managers in selecting or designing custom Toroidal CTs matching specific system parameters.

Toroidal Current Transformers