Numbers Speak For Themselves!
Aunnual Quantity
240000 NOS+
Aunnual Value
Mlillion+
Low Voltage Current Transformers for 0.66kV Systems
Get Factory Price Start From
1 Nos
A leading manufacturer and exporter in low voltage ≤0.66kV current transformers.
Metering Current Transformer
Rated Primary Current: 5A to 6300A Rated Secondary Current: 5A, 1A
Rated Load: 2.5/5/10/20/40VA Accuracy Class：0.2S/ 0.5S/ 0.2/ 0.5/1.0
Protection Current Transformer
Rated Primary Current: 5A to 6300A Rated Secondary Current: 5A, 1A
Rated Load: 2.5/5/10/20/40VA Accuracy Class：5P10/5P20/10P10/10P20
Split Core Current Transformer
"Exclusive Design & Mold | Patented Product for Superior Quality"
Double terminals/ Ultrasonic wave solering/ Large opening design for split-core structure/High accuracy class/ Large burden
Rated Primary Current: 5A to 6300A Rated Secondary Current: 5A, 1A
Rated Load: 2.5/5/10/20VA Accuracy Class：0.5/1.0
BH Metering Current Transformer Production
1. Core Test
2. Core Winding
3. Terminal Soldering
4. Mid-Test
5. Assembly
6. Rivets Installation
7. Nameplate Print
8. Casing Gap Soldering
9. Final Test
10. Test Report Print
11. Inner Box Pack
12. Carton Belt Pack
PR Protection Current Transformer Production
1. Core Test
2. Insulation Layer
3. Core Winding
4. Mid-Test
5. Tape Wrap, Terminals
6. Nameplate
7. Final Test
8. Film Wrap
9. Box Lable
10. Honeycomb Carton
11. Carton Pack
12. Pallet
Applications
Low Voltage Current Transformers (LVCT) are widely used in various applications and equipment, primarily for current measurement, monitoring, and protection in electrical systems.
Used for current monitoring and protection in low-voltage distribution networks, accurately measuring current and providing signals for protection devices (such as overload protection, short-circuit protection, etc.).
Used in motors, transformers, distribution panels, etc., to measure current and monitor the operational status of equipment, helping prevent faults.
Used in smart meters or industrial meters, converting the actual current into readable signals for energy metering, billing, and power usage analysis.
Low voltage current transformers can be integrated with relay protection devices to provide current signals for protection operations, preventing overloads or short circuits in the power system.
Such as solar and wind power generation, used for monitoring current flow and load to ensure the safe and efficient operation of energy systems.
In UPS equipment, current transformers are used to monitor current in real-time, ensuring system stability and safety.
Company Overview
Zhejiang Jego Electric Co., Ltd., established in 2010, is a leading manufacturer and exporter of low voltage electrical apparatus in China. We prioritize engineering excellence, innovation, and customer service. Strategically located in Wenzhou city, Zhejiang province, close to Shanghai and Ningbo sea ports, our focus on efficiency and accessibility drives our operations. Our dedication to quality and environmental responsibility is evident through our ISO9001 and ISO14001 compliance.
Why Choose JEGO Electric?
Here at JEGO electric, we provide customer satisfaction and guarantee world-class service.
With over 13 years of business experience and certifications from various bodies,
we guarantee that our products are of the highest quality and precision.
Our Happy Clients!
Jason
CEO
Rated 4.5 out of 5
Rated 4.5 out of 5
Joe
Director
Jenny
Purchase Manager
Rated 4.5 out of 5
Rated 4.5 out of 5
Henry
CEO
Jayden
Purchase Manager
Rated 4.5 out of 5
We'd Love To Hear From You
contact us
Take the first step, we
will take care for the rest
How to Choose a Current Transformer?
Window Size: according to the specification and number of busbars.
Rated Current Ratio: 1/3 larger than the measured primary current.
Rated Secondary Current: 5A or 1A. When the installation location of the instrument is far away from the current transformer or the loop load is large, please choose the secondary current of 1A.
Rated Burden: the measuring instrument is connected to terminals S1 and S2, and the total load of the connected circuit should not exceed the transformer’s rated load/burden.
Accuracy Class: for measurement—class 1.0, 0.5, 0.2, 0.5S, 0.2S; for protection—class 5P10, 5P20, 10P10, 10P20.
Sales Manager: Gloria Zhao gloria@jegoelec.com gloria@meinna.com
What is Current Transformer Accuracy Class?
A Simple Guide for Choosing the Right CT
When selecting a current transformer (CT) for your power system, one of the most important considerations is the accuracy class. It determines how precise your CT will be in metering, monitoring, or protection applications. Here’s a simple guide to help you understand CT accuracy class and make the right choice for your system.
What is Accuracy Class?
The accuracy class of a CT defines its permissible error margin under specific conditions. It is typically represented by a numeric value such as 0.2, 0.5, 1, or 5P10. For class 0.2, 0.5, 1, lower numbers indicate higher accuracy for metering CTs; while the “P” notation is used for protection CTs.
For example:
- Class 0.5: The CT’s error does not exceed 0.5% of the actual primary current under standard operating conditions.
- Class 5P10: The CT maintains accuracy for protection purposes up to 10 times the rated primary current, with an error margin suitable for protection devices.
Example 1: 200/5A 5VA Class 0.5 (Metering CT)
Let’s take a common example of a metering CT with the following parameters:
- 200/5A Ratio: This CT steps down 200A of primary current to 5A on the secondary side, making it suitable for meters or monitoring devices.
- 5VA Burden: This is the maximum load (in volts-amperes) the CT can handle on its secondary side while maintaining accuracy. Exceeding this burden may lead to increased errors.
- Class 0.5:
- At 200A, the secondary current should ideally be 5A.
- The error margin is 0.5%, meaning the secondary current could vary between 4.975A and 5.025A.
This high precision ensures accurate energy metering and billing, which is essential for financial settlements and compliance in power systems.
Example 2: 400/5A 5VA Class 5P10 (Protection CT)
Now let’s look at a protection CT designed for fault detection:
- 400/5A Ratio: This CT steps down 400A of primary current to 5A on the secondary side, allowing protective relays to operate correctly.
- 5VA Burden: Similar to the metering CT, this represents the maximum load the CT can handle while maintaining accuracy. Protection CTs often connect to multiple devices, making burden considerations critical.
- Class 5P10:
- The “5P” indicates a protection class CT with a permissible error of 5%.
- The “10” means the CT can operate accurately up to 10 times the rated primary current (e.g., 4000A fault current) to ensure protective devices like relays or circuit breakers function correctly.
Protection CTs like this are vital for system safety, as they ensure rapid and reliable fault detection to prevent equipment damage or power outages.
Key Factors to Consider When Selecting a CT
- Application:
- For billing or metering, choose high-accuracy CTs like Class 0.2 or Class 0.5.
- for general monitoring where precision is less critical, CTs with lower accuracy like Class 1 or 3 are more suitable.
- For protection, use CTs with protection classes like 5P10 to handle high fault currents.
- Burden Compatibility:
- Ensure the total connected load (meters, relays, etc.) does not exceed the CT’s rated burden (e.g., 5VA). An overloaded CT will lose accuracy.
- Operating Range:
- Match the CT’s primary current ratio (e.g., 200/5A or 400/5A) with the expected operating current of your system. For example, if your system typically runs at 150A, a 200/5A CT is a good fit.
- Standards Compliance:
- Choose CTs compliant with IEC 61869-2 or IEC 60044-1 standards to ensure performance and reliability.
By understanding and applying accuracy classes with examples like 200/5A Class 0.5 for metering or 400/5A Class 5P10 for protection, you can select the perfect CT for your needs.
At JEGO, we offer a wide range of high-precision, IEC-compliant CTs designed for both metering and protection applications. Contact us today to find the ideal CT for your power system!
