Overview

The LMZ3(D)-0.66 current transformer is specifically designed for use in electric power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 0.66kV or below. These transformers are suitable for indoor installation and play a critical role in various applications such as energy metering, voltage control, and relay protection.

Compliant with international standards IEC60044-1 and GB1208-2006, the LMZ3(D)-0.66 current transformers are designed for high accuracy and reliability. They are essential components for measuring electrical energy and current, ensuring proper functioning of power systems and safeguarding electrical equipment through effective relay protection.

The products are compact, easy to install, and operate efficiently in diverse industrial environments. With their high performance and adherence to global standards, the LMZ3(D)-0.66 series offers a trusted solution for accurate monitoring and protection in low-voltage power systems.

Type Designation for LMZ3(D)-0.66 Current transformer

Construction of LMZ3(D)-0.66 Current transformer

This current transformer features a loop-type iron core with the secondary winding uniformly wound around the core. The structure is designed for optimal magnetic performance and efficient current sensing. The crust of the transformer is made of epoxy casting, ensuring durability and protection from environmental factors.

Additionally, the design includes a hole in the nip area to accommodate the busbar, facilitating easy integration into electrical systems. This feature simplifies the installation process, especially when connecting the transformer to high-voltage systems.

Key Features:

1. Loop-Type Iron Core:
   The loop-type iron core design enhances magnetic flux and ensures efficient current transformation. This configuration maximizes performance and reliability.
2. Uniformly Wound Secondary Coil:
   The secondary winding is evenly wound around the core, ensuring consistent and accurate measurements. This design helps in reducing signal distortion and maintaining high accuracy in current measurement.
3. Epoxy-Casting Crust:
   The transformer is encased in an epoxy resin, providing robust insulation and protection against environmental conditions, such as moisture or dust, that could affect performance.
4. Busbar Integration:
   A strategically placed hole in the nip allows for seamless busbar passage, simplifying installation and connection with the power system.

Structure Features of LMZ3(D)-0.66 Current transformer

The construction of this current transformer is designed with precision to ensure high performance in various applications. The iron core is loop-type, meaning it is shaped to form a closed loop. The secondary winding is carefully wound around the core, ensuring uniformity throughout the process to maintain accurate measurement and signal transmission. This design enhances the transformer’s efficiency by providing a stable magnetic flux.

Additionally, the outer crust is made using epoxy casting, offering a durable and insulating exterior that protects the internal components. The transformer also features holes for busbars to pass through, allowing for efficient and safe installation. These key construction characteristics make the current transformer robust, reliable, and easy to integrate into electrical systems for monitoring and protection purposes.

This structure allows the current transformer to perform effectively, providing accurate measurements and reliable protection in various electrical applications. Whether used for measuring current, electrical energy, or for relay protection in systems with voltages up to 0.66kV, this design ensures the transformer meets the necessary safety and performance standards for optimal operation.

Technical Data of LMZ3(D)-0.66 Current transformer

Type	Rated primary current (A)	Rated secondary current (A)	Accuracy Class	Rated output (VA)
LMZ1-0.66	200, 300, 400, 600, 800	5	0.5	10
LMZ2-0.66	1000, 1200, 1500	5	0.5	15
LMZ2-0.66	2000, 2500, 3000	5	0.5	20
LMZ2-0.66	4000	5	0.5	30

Operating Conditions for LMZ3(D)-0.66 Current transformer

• Ambient Temperature: -5°C to +40°C
• Relative Humidity: ≤ 80%
• Altitude: ≤ 1000m
• Installation Location: Indoors, without any explosive dust or severe vibration.

Outline and Dimensions of LMZ3(D)-0.66 Current transformer

Overall Dimension of LMZ3(D)-0.66 Current transformer

Type	A (mm)	B (mm)	C (mm)	D (mm)	E (mm)	F (mm)	G (mm)	K (mm)	L (mm)	W (mm)	H (mm)
LMZ3D-0.66 B00-1500/5	131	86	48	43	2-M6	30	39	45	144	63	135
LMZ3D-0.66 3000/5	187	130	90	62	2-M8	74	50	205	66	174

FAQs forLMZ3(D)-0.66 Current transformer 

• What are the primary applications of the RCT Indoor Current Transformer? The RCT is ideal for current measurement, energy metering, and relay protection in low-voltage electrical systems.
• Can the RCT transformer be used in outdoor environments? No, the RCT transformer is specifically designed for indoor use only.
• What is the maximum rated voltage for the RCT transformer? The RCT transformer is designed for use in systems with a rated voltage of 0.66kV or below.
• What is the primary feature of the RCT transformer’s design? The RCT features a durable loop-type iron core and uniform secondary winding to ensure efficient current transformation and measurement.
• Is the RCT transformer customizable? Yes, the RCT transformer can be customized with different current ratios and accuracy classes to suit specific operational needs.

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