Current Transformer Series

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Our R&D: Our R&D team consists of senior technical experts with decades of experience in the design and manufacture of high and low voltage electrical equipment. Their expertise, combined with our advanced facilities, enables us to always lead industry trends and continuously optimize our product portfolio.

Quality control: We are able to accurately and efficiently produce a wide range of high-quality electrical products that comply with GB 1984-2024 and GB/T11022-2020 standards to ensure the highest quality.

Customization requirements: We know that our customers' needs are different, so each product can be designed according to the specific needs of the customer.

Our services: In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

Advantages of Current Transformer Series

High measurement accuracy

The output signal accuracy can reach 0.5, 0.2 or even higher, which can meet the application occasions with high requirements for current signal accuracy.

Wide measurement range

It can be applied to different voltage and current levels, and can meet the needs of various power systems and industrial application scenarios. Modern current transformers usually have a multi-speed adjustable measurement range.

Small size and light weight

Made of insulating materials and fine wires, it has a compact overall structure, small size, light weight, and is easy to install and maintain. In electrical equipment with limited space, such as switch cabinets, distribution boxes, etc.

Good dynamic performance

It can respond to current changes quickly and accurately, has good frequency response and dynamic characteristics, and is suitable for application scenarios with a large current change range and high waveform requirements, such as short-circuit fault detection and protection in power systems.

Low power consumption

The current transformer consumes very little energy when working, and almost no additional load is caused to the circuit being measured. This enables the current transformer to maintain stable performance during long-term use, reducing energy consumption and the impact on the power system.

Specification of Current Transformer Series

NO.	Main technical parameters
1	Rated voltage	KV	40.5
2	Primary current	A	50-1200
3	Secondary current	A	5/1
4	Measurement level	-	0.2/0.2S/0.5/0.5S
5	Protection level	-	5P/10P

Types of Current Transformer Series

large enterprise scale

Wound current transformer: A wound current transformer has separate primary and secondary windings wrapped around a core. It is designed so the primary side consists of a winding with multiple turns. This design allows for precise control over the transformation ratio as both ns and np are customizable. It is also the standard form of a current transformer.

Toroidal current transformer

A toroidal current transformer is a variant of the wound current transformer with the primary side removed. This type of current transformer is shaped like a ring, allowing a current-carrying conductor to pass through. This conductor will act as the primary winding.

Bar current transformer

The bar current transformer works just like a toroidal current transformer, except the current-carrying conductor passing through its secondary winding is always fixed, and not removable. The bar current transformer is the most ideal for high current measurement.

Features of Current Transformer Series

The primary winding carries the high current and is connected in series with the main circuit. The secondary winding outputs a much smaller current (commonly 5A or 1A) and connects to meters or relays.

The iron core enhances magnetic induction and ensures high measurement accuracy. The insulating enclosure provides safety and protection from high-voltage breakdown.

Application of Current Transformer Series

Helps in detecting undercurrent and overcurrent situations to timely trigger or notify the protective devices to pause working. It also helps in providing feedback to control systems and protection relays.

Helps in detecting the faults in the power systems to prevent damage. The current flow is monitored and analyzed to get accurate information about the nature and location of the fault. By detecting the faults it is possible to resolve the issue as early as possible for restoring power.

Current transformers are also utilized in monitoring and measuring energy efficiency. By measuring the current flowing, it is possible to get the details about the energy consumption. It helps in minimizing energy wastage by optimizing the usage of energy.

Packing and Shipping of Current Transformer Series

Packing	Box
Shipping	Shipped by road, sea, rail

FAQ

Q: What is the current transformer in series?

A: A current transformer (CT) is a device that is used to measure current in an electrical system. The CT is connected in series with the circuit, and the current flowing through the circuit is measured by the CT. The output of the CT is usually in the form of a voltage which can be measured by a voltmeter.

Q: What is the main purpose of a current transformer?

A: A Current Transformer (CT) is used to measure the current of another circuit. CTs are used worldwide to monitor high-voltage lines across national power grids. A CT is designed to produce an alternating current in its secondary winding that is proportional to the current that it is measuring in its primary.

Q: What are CT and PT used for?

A: CT and PT type of transformer used in AC power. CT and PT both are measuring devices used to measure currents and voltages. They are used where large quantities of currents and voltages are used. The role of CT and PT is to reduce high current and high voltage to a parameter.

Q: Do current transformers step-up or down?

A: By reducing current in the secondary side, C.T. also steps up the voltage on the secondary side.

Q: Where to put a current transformer?

A: Place the CT around the correct conductor or cable. It should encircle the conductor without any obstruction or air gaps. Proper placement ensures that the CT can accurately measure the current flowing through the conductor.

Q: How to decide what transformer to use?

A: To select the proper transformer, determine the input and output voltages, frequency and current. The faster the voltage changes, the higher the frequency. The higher the current, the more heat is produced.

Q: How to check a current transformer?

A: The output voltage of a current transformer (CT) can be tested in the field using an digital multimeter with a millivolt AC (mVac) range. This test is useful to confirm that the CT is working properly and that current is flowing in the conductor that the CT is installed on.

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