Three-Phase Through-Type Current Isolating Transformer (ICT)

Tagline High-Accuracy, Wide-Range Current Isolation for Energy Meter Testing

Overview

When testing three-phase energy meters whose voltage and current circuits are inseparable (closed links), current isolation is required to ensure accuracy. For multi-meter and complex three-phase test setups, voltage isolation alone is insufficient. The ICT provides true 1:1 current isolation with electronic error compensation, enabling precise, safe, and flexible calibration under equipotential conditions.

Each ICT contains three independent 1:1 current transformers, supporting:

• Three-phase energy meters with non-separated voltage/current circuits
• Single-phase meters under non-separated conditions
• Multi-station meter test benches with equipotential current supply per position

To maintain high accuracy across different meter types and burdens, the ICT integrates an electronic error compensator and offers ample secondary output capacity. At 200 A, the secondary can deliver over 120 VA while maintaining accuracy. Secondary open-circuit/overload conditions are monitored with indication and automatic short-circuit protection.

Key Features

• Ultra-wide range: 0.1–200 A primary / 0.1–200 A secondary (1:1)
• Single-turn through-type structure for low loss and high efficiency
• High output capacity: up to 140 VA at 200 A
• Electronic error compensation for 0.01% class accuracy over wide range
• Secondary open-circuit and overload indication, alarm, and automatic short-circuit protection
• External status indicators and control buttons for ease of use
• Supports multi-ICT series primary connection with isolated secondary outputs per meter position

Typical Applications

• Three-phase and single-phase energy meter calibration (closed-link meters)
• Multi-position meter test benches using equipotential method
• Utility and metrology labs requiring high-accuracy current isolation

Technical Specifications

• Accuracy class: 0.01% [cosφ = 0.5C … 1 … 0.5L]

• Current range:

  • Primary: 0.1–200 A
  • Secondary: 0.1–200 A (1:1 ratio)

• Frequency: 50/60 Hz ±5%

• Output load:

  • 0.1–1 A: Z = 0.5 Ω
  • 1–200 A: permissible burden ≈ 0.6 V divided by current value

• Burden/voltage limits:

  • Maximum secondary output load voltage: 0.7 V
  • Secondary output capacity: ≥120 VA at 200 A (typ.), max output power up to 140 VA at 200 A

• Insulation:

  • Primary to secondary; windings to enclosure: 2500 V/1 min, leakage < 5 mA

• Environmental:

  • Operating temperature: +22 ℃ ±5 ℃

• Power supply:

  • Auxiliary: 2 × 13.5 V AC, 50/60 Hz, ±5%

Connection Guidelines

• For multi-ICT setups: Connect primaries in series; use each secondary independently to supply the meter under test.
• Use the provided protection features to prevent secondary open-circuit conditions at high current.

Safety & Protection

• Secondary open-circuit/overload detection with visual indication and alarm
• Automatic secondary short-circuit to protect devices and maintain stability
• High insulation strength between primary, secondary, and enclosure

Ordering Information

• Model: Three-Phase Through-Type Current Isolating Transformer (1:1, 0.1–200 A)
• Accessories: Power cables (AC 12–0–12), 7-pin I/O terminal plug, quick-start guide

Notes

• Accuracy specifications apply within stated burden and environmental conditions.

Guangzhou GENY Electric Co. Ltd. is a leading manufacturer of energy meter test systems, whose predecessor is Guangzhou Yangcheng Science & Technology Enterprises Co., Ltd. which was established in 1987. We have been dedicated to the energy meter testing industry for over 30 years, and continuously invest in R&D to improve our technology and the quality of our products. It enables GENY to provide top quality products and prompt after-sales service to customers at home and abroad.

GENY's product lines include stationary energy meter test system and portable meter test equipment, which fully comply with the national and international standards of GB, IEC, CE, ISO, etc. Thanks to excellent parameters and high functionality, more than eight thousand sets of test benches and more than one million sets of portable standards have so far found applications in China and overseas markets, and received excellent evaluation and reputation.

We are a privately owned high-tech company with an import and export license. Over the past ten years, we have made great efforts to develop overseas markets and have achieved excellent results. Our products have been shipped to more than 40 countries and regions, serving not only industrial customers, power companies, but also national laboratories.

Providing local technical support and after-sales service to global customers is our priority, and GENY focuses on supplying the right quality products and being a reliable partner in the past and in the future. We welcome our esteemed customers worldwide to cooperate with us.

Our customers

Our customers are located nationwide and worldwide:

1.More than electricity science research institutes over provincial level including China including National Electricity Science Research Institutes, North China Electricity Science Research Institutes, and East China Electricity Science Research Institutes (National Metrology Metrology Institute/Laboratory);

2.More than 210 power supply bureaus above the county level, including Shanghai Electricity Bureau, Beijing Electricity Bureau, Chongqing Electricity Supply Bureau;

3.More than 200 electric energy meter manufacturers including Hangzhou Holley Co., Ltd. and Ningbo Sanxing Co., Ltd.

4.In the international market, many large-scale energy meter manufacturers and power choose our products to replace ZREA or MTE products, such as Itron, Landis+gyr, EDMI, Secure Meters, BENTEC India Limited, Crystal Power Sinhal Udyog, ZEN Meters, Gram Power, LAN Engineering, Modern Transformers, Email Metering, AMPY UK, ITI LIMITED, Smart Meters (ADANI), United Electrical Ltd, SANDS Chennai, ALPHION, Ceylon Electricity Board, BSES NABL LAB etc. & various other national & international power companies, labs & meter manufacturers.

Our company is dedicated to providing customers with quality products and services. The goal is to make customers' dreams come true. At the same time, we believe in bring you the great economic benefit and development. Please either take a look at our website for more detailed information, or contact us directly. We look forward to the opportunity to work with your company for mutual success.

Our resources and advantages

1.We have been engaged in the field of electric energy meter measurement for 30 years as the technological leader and creator of new technology in the field of electric energy meter calibrator. We have an excellent R&D team that has been devoted to the technical development of electric energy meter test instruments for a long time,we can satisfy the various different requirements of all kinds of customers.

2. All of our employees have received specialized training and acquired good professional quality and skills. The company adopts ISO9001 management system, and we passed ISO9001-2000 certification in 2002, and all employees have received TQM training. GENY has now realized ISO9001 control of R&D production, marketing & sales and service to fully guarantee product quality.

3.We have a complete marketing network and offer a competitive price.

Our well-trained service team is able to provide maintenance, training, schematic design and software update services to each customer for the first time. Thus, GENY will be your reliable partner and we welcome our honorable customers worldwide to cooperate with us.