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LZZBJ9-35 Type Current Transformer for 35kV Power Systems - Top Suppliers and Factory in China

The LZZBJ9-35 current transformer is an essential component for power systems operating at rated frequencies of 50Hz or 60Hz and rated voltages of 35kV. Manufactured in China, this transformer is ideal for electric energy metering, current measurement, and ensuring reliable relay protection. As a leading supplier in the industry, our factory adheres to high-quality execution standards, specifically GB20840.1-2010 and GB20840.2-2014, guaranteeing the performance and durability of our products. Trust our expertise as a top China supplier for all your current transformer needs

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Product Detail

Model and its meaning

Summarize

15-40.5kV indoor current transformers are key components in electrical engineering, possessing excellent insulation performance, strong environmental adaptability, and high measurement accuracy. Their design and functionality comply with industry standards, ensuring compliance with the stringent requirements of indoor power systems. As we move towards a future centered on energy efficiency and reliability, the role of current transformers will become increasingly prominent, making them an indispensable part of building a sustainable and efficient energy future.

The 15-40.5kV indoor current transformer is an important electrical device used in power systems. It is widely used in various indoor substations, distribution rooms, and other power locations, and can be used in conjunction with switchgear, metering cabinets, and other equipment to provide strong support for the safe, stable, and efficient operation of the power system. Whether in industrial power supply systems or urban power grid substations, the 15-40.5kV indoor current transformer plays an indispensable role.

Normal Service Condition

🏢 Installation Location: Indoor, suitable for use in various environments such as power equipment and control rooms, to ensure the safe and stable operation of equipment and provide good working conditions.

🌡️ Ambient Temperature: Maximum temperature 40℃; minimum temperature -5℃; daily average temperature not exceeding 30℃, to adapt to climate changes in different seasons, ensure normal operation of the equipment under various temperature conditions, avoid performance impact due to excessively high or low temperatures, and guarantee the long-term stability of the equipment.

🌫️ Atmospheric Conditions: The atmosphere is free of severe pollution, ensuring that the equipment operates in a good environment, thereby improving its reliability and service life, reducing the possibility of failure, ensuring the stability and safety of the power system, and also providing convenience for equipment maintenance and management.

Technical Parameters

Product Model	Rated Primary Current (A)	Accuracy Level Combination	Rated Output (VA)	Rated Short-term Thermal Current (kA)	Rated Dynamic Stability Current (kA)
LZZBJ9-35	15	0.2/10P10 0.5/10P10 0.2/5P20 0.5/5P20 0.2/0.5/10P10 0.2/0.5/5P20 0.2/10P10/5P20 0.5/10P10/5P20	15/20 20/20 15/20 20/20 15/20/20 15/20/20 15/20/20 20/20/20	1.5/1	3.75
	20			2/1	5
	30			3/1	7.5
	40			4/1	10
	50			5/1	12.5
	75			7.5/1	18.75
	100			10/1	25
	150			15/1	37.5
	200			20/1	50
	300			31.5/1	80
	400			31.5/2	80
	500			31.5/2	80
	600			31.5/2	80
	800			31.5/3	80
	1000			31.5/3	80
	1200			31.5/3	80
	1500			31.5/3	80
	2000			31.5/3	80

⚡ Rated Secondary Current: 5A or 1A

🔒 Rated Insulation Level: 40.5 / 95 / 185 kV

Structure and Characteristics

🔧 Fully Enclosed Epoxy Resin Casting Structure: Provides excellent insulation and moisture resistance, ensuring stable operation under various environmental conditions.

✨ Clear Outline & Attractive Appearance: Easy to clean, facilitating daily maintenance and management.

🔌 Junction Box at Secondary Wiring Point: With holes on the front and side to mate with the output terminals for wiring, ensuring safety and reliability, effectively preventing wiring faults, and ensuring accurate current signal transmission.

🛠️ Grounding Bolt, Nameplate & Four Mounting Holes: This rational design allows for flexible installation and fixation, adapting to different installation needs and further enhancing the stability and safety of the equipment.

Frequently Asked Questions (FAQ)

❓ What is the voltage range of the LZZBJ9-35 indoor current transformer?

The LZZBJ9-35 indoor current transformer is designed for use in the 15–40.5kV voltage range, with a rated insulation level of 40.5/95/185kV, making it suitable for medium-voltage indoor power systems including substations and distribution rooms.

❓ What are the rated secondary current options for this current transformer?

The LZZBJ9-35 current transformer offers two rated secondary current options: 5A or 1A. The appropriate option can be selected based on the connected metering or protection equipment requirements.

❓ What accuracy levels are available for the LZZBJ9-35 current transformer?

The transformer supports multiple accuracy level combinations, including 0.2/10P10, 0.5/10P10, 0.2/5P20, 0.5/5P20, and multi-core configurations such as 0.2/0.5/10P10 and 0.5/10P10/5P20, accommodating both metering and protection functions.

❓ What are the allowable ambient temperature conditions for this transformer?

The LZZBJ9-35 is designed to operate within an ambient temperature range of -5℃ (minimum) to 40℃ (maximum), with a daily average temperature not exceeding 30℃. This ensures reliable performance across a wide range of seasonal and indoor climate conditions.

❓ What type of enclosure and insulation does the LZZBJ9-35 use?

The LZZBJ9-35 features a fully enclosed epoxy resin casting structure, which delivers superior insulation performance and moisture resistance. This construction ensures long-term stable operation even in challenging indoor environments.

❓ What applications is the LZZBJ9-35 current transformer suitable for?

The LZZBJ9-35 is widely used in indoor substations, distribution rooms, switchgear, and metering cabinets across industrial power supply systems and urban power grid substations. It provides precise current measurement and protection functions essential for safe and efficient power system operation.