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CT/PT Transformer

A CT (Current Transformer) and PT (Potential Transformer) are both types of instrument transformers used in electrical power systems.

A current transformer, or CT, is designed to measure high currents flowing through power conductors. It consists of a primary winding and a secondary winding. The primary winding is connected in series with the conductor carrying the high current, while the secondary winding is connected to a measuring or protection device. The primary winding has a lower number of turns compared to the secondary winding, resulting in a reduced current being detected and measured by the secondary winding. CTs are used for accurate measurement, metering, and protection of high currents in power systems.

A potential transformer, or PT, is used to measure high voltages in power systems. Similar to a CT, it also has a primary winding and a secondary winding. The primary winding of a PT is connected in parallel across the high voltage line, and the secondary winding is connected to the measuring device. The primary winding is designed with a high voltage rating, while the secondary winding provides a lower voltage proportional to the high voltage being measured. PTs are commonly used for voltage measurement, metering, and protective relay applications in power systems. They allow for accurate and safe measurement of high voltages.

Both CTs and PTs are essential components of power system measurement and instrumentation. They ensure the safe and reliable monitoring of electrical currents and voltages, enabling effective control and protection of power systems.

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Current transformer electric equipment with copper materials

Current transformer electric equipment with copper materials

LZC-12 Electronic Current Transformer - A Versatile Solution for High Voltage Switchgear Applications The LZC-12 Electronic Current Transformer is a cutting-edge device specially designed for high voltage switchgear applications up to 12kV and below. It seamlessly integrates with electronic instruments and microcomputer measurement and protection equipment, offering a comprehensive range of functionalities, including measurement, control, protection, and data transmission. Constructed with high-quality copper materials, the LZC-12 ensures superior performance and reliable current monitoring in AC circuits. Its primary objective is to accurately measure the current flowing through the primary coil and provide proportional voltage output through its secondary coil. One remarkable feature ......

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Through-core current transformer indoor high current transformer for Inflatable Cabinet

Through-core current transformer indoor high current transformer for Inflatable Cabinet

LMZC-10 Current Transformer - Accurate and Reliable Solution for Current Monitoring and Protection in Power Systems The LMZC-10 Current Transformer is an exceptional device designed for precise and reliable current measurement in AC circuits. Its innovative design and advanced technology make it an ideal choice for accurate current monitoring and protection in various power systems. At the heart of the LMZC-10 is a primary coil and a secondary coil. The primary coil consists of a specific number of turns and is connected within the measurement circuit. When an AC current flows through the primary coil, it generates an alternating magnetic field around it. This magnetic field, in turn, induces an electromotive force within the secondary coil. The secondary coil is wound around the primary......

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Dedicated circuit breaker zero sequence current transformer

Dedicated circuit breaker zero sequence current transformer

The LZW8-10 Dedicated Circuit Breaker Zero Sequence Current Transformer is designed to transform the high current on the primary side into a uniform standard 5A or 1A current. This current is then used as the standard input current for measurement, metering instruments, and relay protection devices. Selecting the correct current transformer is crucial as it involves ensuring the accuracy of measurement and metering instruments, as well as the proper operation of relay protection devices. When selecting a current transformer, several factors need to be considered. Firstly, the type of current transformer must be chosen based on the desired measurement and protection objectives. The primary and secondary rated current ratios need to be carefully selected in order to achieve accurate measure......

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Split core high sensitivity indoor current transformer electrical equipment

Split core high sensitivity indoor current transformer electrical equipment

The LZW20-10 Split Core High Sensitivity Indoor Current Transformer is specifically designed for current, energy measurement, and microcomputer protection of power supply equipment in 10kV AC power systems. This current transformer offers several distinctive features, including compact size, lightweight construction, and easy installation, making it highly suitable for a wide range of applications, including compact ring network switchgear and capacitors. In terms of design, the LZW20-10 current transformer incorporates a toroidal core and secondary winding made from high-quality epoxy resin, which is vacuum-cast within a flame-retardant plastic housing. This specific construction ensures resistance to moisture, stable performance, and eliminates the need for maintenance. With its small s......

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Integrated inflatable cabinet dedicated feedthrough current transformer

Integrated inflatable cabinet dedicated feedthrough current transformer

The LMZT-10 three-phase integrated inflatable cabinet dedicated feedthrough current transformer is specifically designed to be installed on inflatable cabinets. It is used for the measurement and protection of current and zero-sequence current, and can also be used for the measurement and protection of zero-sequence current in multiple cable circuits. The core and secondary winding of the LMZT-10 series zero-sequence current transformer are made from high-quality epoxy resin, which is vacuum cast in a flame retardant plastic casing. This design ensures moisture resistance, stable performance, and eliminates the need for maintenance. This current transformer is a reliable and efficient solution for accurate current measurement and protection in various applications. Its installation on in......

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High Voltage indoor three phase current transformer

High Voltage indoor three phase current transformer

The LZZBJ9-10 current transformer is a versatile indoor epoxy resin-casted pillar-type product designed to operate in a wide range of conditions. It is specifically used for current, energy metering, and relay protection purposes in power systems with a rated frequency of 50Hz and a rated voltage of 10kV or below. This current transformer is suitable for both centralized and other types of switchgear installations. One notable feature of the LZZBJ9-10 current transformer is its ability to cater to user requirements by offering options for dual or triple winding ratio structures. This flexibility allows for customized performance based on specific needs. Currently, the LZZBJ9-10 current transformer is available in multiple accuracy classes such as 0.5, 0.2, 0.5S, and 0.2S. It also offers ......

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Single Phase High Current Residual  Zero Sequence Current Transformer

Single Phase High Current Residual Zero Sequence Current Transformer

LMZK Series Current Transformer is a compact and lightweight device known for its small size, easy installation, and convenient functionality. It is widely used in compact fully insulated ring main units and is highly compatible with remote terminal devices like RTUs and FTUs, providing essential data support for the entire system. The installation process is simple and efficient, as it can be directly attached to the connected input and output cables. This current transformer has found extensive applications in various models of compact fully insulated ring main units, including SafeRing/Plus, Uniswitch, RM6/SM6, SVS, GA/GE, FB, and SS. Additionally, it is also suitable for use in combination substations and cable junction boxes. The LMZK Series Current Transformer utilizes high-quality......

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3 phase Indoor  Open-Close Type  Zero Sequence current transformer

3 phase Indoor Open-Close Type Zero Sequence current transformer

The LXK Series Zero Sequence Current Transformer is specifically designed for use in power systems and high-voltage three-phase AC generators and motors, providing effective protection against zero sequence overcurrent. It is suitable for indoor installation and can be used in 10kV and below, 50Hz line circuits. The outer diameter of the transmission cable should not exceed 120mm. Innovative Design: The LXK Series features a unique and innovative design, dividing the current transformer into two halves. These halves are then cast in resin to form a semicircular shape and connected using clamping brackets. This design allows for easy installation by separating and then merging the current transformer into a single unit, ensuring utmost convenience during setup. Secure and Reliable Protect......

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China CT/PT Transformer is one kind of products from RZMV factory. As one of leading manufacturers and suppliers in China, we provide durable products. We can sell them at a low price and can be customized. We sincerely look forward to becoming your reliable long-term business partner!