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LMK1(BH)-0.66 current transformer

0102030405

LZZB9-24/180b/2(Series Current Transformers from China Suppliers and Factory for Power Systems

The LZZB9-24/180b/2(series current transformers are engineered for power systems operating at a rated frequency of 50Hz or 60Hz and a voltage of 20kV. As leading China suppliers and manufacturers in the power industry, we provide these transformers for critical applications such as energy metering, current measurement, and relay protection, ensuring the safe and stable operation of power systems. Our design emphasizes reliability in high-voltage environments, effectively catering to diverse power application needs while delivering precise current measurement and monitoring.

This product complies with the execution standards GB20840.1-2010 and GB20840.2-2014, affirming our commitment to quality as a trusted factory.

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Product Detail

Model and its meaning

Summarize

🛡️ Superior Insulation Performance: Rated insulation voltages up to 40.5/95/185kV, these transformers are designed to withstand the harsh conditions of high-voltage environments. For example, the creepage distance of the LZZB9-35 and 40.5 type current transformers is as long as 851mm, effectively preventing insulation breakdown. This characteristic is crucial for ensuring the safe and reliable operation of the transformer, as it minimizes the risk of electrical faults that could lead to catastrophic failures.

🌍 Excellent Environmental Adaptability: Its design resists pollution and humidity, making it suitable for harsh indoor environments. This adaptability is crucial for maintaining performance in a variety of climates, including tropical regions. This 15-40.5kV indoor current transformer operates normally within a temperature range of -5℃ to 40℃, further highlighting its versatility and enabling its widespread application and stable performance in diverse environments.

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 equipment under various temperature conditions, and avoid performance impact due to excessively high or low temperatures.

💨 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, and ensuring the stability of the power system.

Technical Parameter

LZZB9-24/180b/2 Technical Parameter Table of Type Current Transformer

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZB9-24/180b/2	20	0.2/0.2 0.2/0.5 0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15	15/15 15/20 10/20 15/20 10/15 15/15	3	7.5
	30			4.5	11.25
	40			6	15
	50			7.5	18.75
	75			11.25	28.125
	100			15	37.5
	150			22.5	56.25
	200			31.5	80
	300			45	112.5
	400
	500
	600	0.2/0.2 0.2/0.5 0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15 0.2S/10P30	15/15 15/20 10/20 15/20 10/15 15/15 15/15	63	130
	800			63	130
	1000			80	160
	1200
	1250

Rated secondary current: 5A or 1A

Rated insulation level: 24/65/125kV

LZZB9-24/180b/4 Technical Parameter Table of Type Current Transformer

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZB9-24/180b/4	20	0.2/0.2/0.2 0.2/0.5/0.5 0.2/10P10/10P10 0.5/10P10/10P10 0.2/10P15/10P15 0.5/10P15/10P15	10/10/10 10/10/10 10/15/15 10/15/15 10/10/15 10/10/15	3	7.5
	30			4.5	11.25
	40			6	15
	50			7.5	18.75
	75			11.25	28.125
	100			15	37.5
	150			22.5	56.25
	200			31.5	80
	300			45	112.5
	400
	500
	600	0.2/0.2/0.2 0.2/0.5/0.5 0.2/10P10/10P10 0.5/10P10/10P10 0.2/10P15/10P15 0.5/10P15/10P15 0.2S/0.5/15P30/15P30	10/10/10 10/10/10 10/15/15 10/15/15 10/10/15 10/10/15 15/15/15/15	63	130
	800			63	130
	1000			80	160
	1200
	1250

Structure and Characteristics

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

📦 Compact Structure — Small size, light weight, and easy surface cleaning, facilitating daily maintenance and management.

🔌 Terminal Box — Installed at the secondary output terminals, ensuring safety and reliability and effectively preventing wiring faults.

🔧 Flexible Installation — The base plate includes a grounding bolt and six mounting holes, allowing for flexible installation and fixation to meet diverse installation needs.

Frequently Asked Questions

What is the rated insulation voltage of the LZZB9-24/180b series current transformer?

The LZZB9-24/180b series current transformer has a rated insulation level of 24/65/125kV, designed to withstand the demanding conditions of high-voltage indoor environments. The series also supports insulation voltages up to 40.5/95/185kV for higher-rated variants.

What is the operating temperature range for this current transformer?

This 15-40.5kV indoor current transformer operates normally within a temperature range of -5℃ to 40℃, with a daily average temperature not exceeding 30℃. This ensures reliable performance across different seasonal and climatic conditions.

What are the rated secondary current options available?

The LZZB9-24/180b series current transformers offer two rated secondary current options: 5A or 1A, providing flexibility to match various metering and protection system requirements.

What is the difference between the LZZB9-24/180b/2 and LZZB9-24/180b/4 models?

The LZZB9-24/180b/2 model supports dual-winding accuracy level combinations (e.g., 0.2/0.5, 0.2/10P10), while the LZZB9-24/180b/4 model supports triple-winding accuracy level combinations (e.g., 0.2/0.2/0.2, 0.2/0.5/0.5, 0.2/10P10/10P10), making the /4 variant suitable for applications requiring more complex metering and protection configurations.

Is this current transformer suitable for use in polluted or humid environments?

Yes. The fully enclosed epoxy resin casting structure provides excellent resistance to pollution and humidity. The transformer is designed for indoor environments that are free of severe pollution, making it suitable for power equipment rooms, control rooms, and similar installations across various climates including tropical regions.

What installation options does the LZZB9-24/180b current transformer support?

The base plate of this current transformer is equipped with a grounding bolt and six mounting holes, allowing for flexible and secure installation to meet diverse mounting requirements. Its compact and lightweight design further simplifies the installation process and daily maintenance.