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China LZZBJ9-12/175b/2(Series Current Transformers - Reliable Power Solutions from Trusted Suppliers and Factory

Discover top-quality current transformers manufactured in China, essential for power monitoring and protection relays. Our products are widely recognized among suppliers and are integral to metering equipment and various applications within power systems. Whether for industrial, commercial, or residential power management, our factory delivers reliable current measurement solutions that meet the execution standards of GB20840.1-2010 and GB20840.2-2014.

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Outline and Installation Dimension Drawing

🏷️ Model and its meaning

📋 Summarize

Current transformers must be operated within specified normal operating conditions. They should be installed indoors in a temperature-controlled environment. They are designed to operate within a temperature range of -5°C to 40°C, with an average daily temperature not exceeding 30°C. These conditions are crucial to ensuring the lifespan and reliability of the current transformer, as extreme temperatures can adversely affect its performance and accuracy.

⚙️ Normal Service Condition

🏠 Installation site: Indoor.

🌡️ Ambient temperature: Maximum air temperature 40℃; The minimum temperature is -5℃. The daily average temperature does not exceed 30℃.

🌫️ Atmospheric conditions: There is no severe pollution in the atmosphere.

📊 Technical Parameter

📌 LZZBJ9-12/175b/2 Type — Technical Parameter Table of Current Transformer

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZBJ9- 12/175b/2	5	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15 0.2S/10P30	10/15 10/15 10/15 15/15 15/15	0.6	1.5
	10			1.2	3
	15			1.8	4.5
	20			2.4	6
	30			3.6	9
	40			4.8	12
	50			6	15
	75			9	22.5
	100			12	30
	150			18	45
	200			21	52.5
	300	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15 0.2S/10P30	10/15 10/15 10/20 15/20 15/15	24.5	61.25
	400			32	80
	500
	600
	800	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15 0.2S/10P30	15/20 15/20 15/20 30/20 15/15	50	125
	1000
	1200
	1250
	1500	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15 0.2S/10P30	15/20 15/20 20/20 30/20 15/15	63	157.5
	2000
	2500
	3000
	3150

📌 LZZBJ9-12/175b/4 Type — Technical Parameter Table of Current Transformer

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZBJ9-12/175b/4	5	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	10/10/20 10/10/15 10/10/15 10/15/15 10/15/15 10/10/15/15	0.6	1.5
	10			1.2	3
	15			1.8	4.5
	20			2.4	6
	30			3.6	9
	40			4.8	12
	50			6	15
	75			9	22.5
	100			12	30
	150			18	45
	200			21	52.5
	300	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	10/10/20 10/10/20 10/15/15 10/15/20 15/15/15 10/10/15/15	24.5	61.25
	400			32	80
	500			32	80
	600	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	10/10/20 10/10/15 10/10/15 10/15/15 15/15/15 10/10/15/15	32	80
	800		10/10/20 10/10/15 10/10/15 10/15/15 15/15/15 10/10/15/15	50	125
	1000	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	10/10/30 15/15/20 15/20/20 10/15/15 15/15/20 10/10/15/15	50	125
	1200
	1250
	1500			63	157.5
	2000			63	157.5
	2500	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	15/15/30 15/15/20 15/20/20 15/15/20 15/20/15 10/10/15/15	63	157.5
	3000	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.5/5P10/10P20 0.2S/0.5/5P30/5P30	15/15/30 15/15/20 15/30/20 15/15/20 15/20/15 10/10/15/15	63	157.5
	3150		15/15/30 15/15/20 15/30/20 15/15/20 15/20/15 10/10/15/15	63	157.5

⚡ Rated secondary current: 5A or 1A | Rated insulation level: 12/42/75kV.

🔩 Structure and Characteristics

This series of current transformers utilizes a fully enclosed epoxy resin cast structure, exhibiting excellent insulation and moisture resistance. Its compact design, small size, and light weight make it easy to clean and maintain. The secondary terminals are equipped with a terminal block for safety and reliability. The baseplate is equipped with a grounding bolt and six mounting holes for flexible installation.

❓ Frequently Asked Questions

Q What is the operating temperature range of the LZZBJ9-12/175b current transformer?

The LZZBJ9-12/175b current transformer is designed to operate within a temperature range of -5°C to 40°C, with an average daily temperature not exceeding 30°C. It must be installed indoors in a temperature-controlled environment to ensure optimal performance and longevity.

Q What is the rated insulation level of the LZZBJ9-12/175b series?

The rated insulation level of the LZZBJ9-12/175b series current transformer is 12/42/75kV, providing reliable protection across a range of medium-voltage applications.

Q What are the available accuracy level combinations for the LZZBJ9-12/175b/2 type?

The LZZBJ9-12/175b/2 type supports multiple accuracy level combinations including 0.2/10P10, 0.5/10P10, 0.2/10P15, 0.5/10P15, and 0.2S/10P30, making it suitable for both metering and protection applications.

Q What is the rated secondary current for this current transformer?

The rated secondary current for the LZZBJ9-12/175b series is either 5A or 1A, allowing compatibility with a wide range of measuring instruments and protection relays.

Q What structural features make the LZZBJ9-12/175b series easy to install and maintain?

The LZZBJ9-12/175b series features a fully enclosed epoxy resin cast structure with excellent insulation and moisture resistance. Its compact, lightweight design simplifies cleaning and maintenance. The secondary terminals include a terminal block for safe connections, while the baseplate provides a grounding bolt and six mounting holes for flexible installation options.

Q What is the difference between the LZZBJ9-12/175b/2 and LZZBJ9-12/175b/4 types?

The primary difference lies in the number of cores and the accuracy level combinations available. The /2 type supports dual-core configurations with combinations such as 0.2/10P10 and 0.5/10P15, while the /4 type supports four-core configurations with more complex combinations such as 0.2/0.2/5P10 and 0.2S/0.5/5P30/5P30, making the /4 type suitable for more demanding metering and multi-protection applications.