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China LZZB9-24/180b/2(Series Current Transformers - Reliable Power Measurement Solutions from Suppliers & Factory

The LZZB9-24/180b/2(series current transformers are specifically designed for power systems operating at a rated frequency of either 50Hz or 60Hz, and a rated voltage of 20kV. As one of the leading China suppliers and manufacturers in the power industry, we ensure these transformers play a crucial role in energy metering, current measurement, and relay protection. They are essential for maintaining the safe and stable operation of power systems.

Our current transformers are built with a focus on reliability in high-voltage environments, making them suitable for a range of diverse power applications. Users can rely on these transformers for precise current measurement and monitoring, enhancing their operational efficiency. All products adhere to 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

A key highlight of the 15-40.5kV indoor current transformer is its 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.

In addition to its superior insulation performance, this current transformer also boasts 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

Product model	Rated primary current (A)	Accuracy level combination	Rated output (VA)	Rated short-term thermal current (kA)	Rated dynamic stability current (kA)
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

LZZB9-24/180b/4 Technical Parameter Table

Product model	Rated primary current (A)	Accuracy level combination	Rated output (VA)	Rated short-term thermal current (kA)	Rated dynamic stability current (kA)
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

Rated secondary current: 5A or 1A Rated insulation level: 24/65/125kV

Structure and Characteristics

This series of current transformers features a fully enclosed epoxy resin casting structure, providing excellent insulation and moisture resistance, ensuring stable operation under various environmental conditions. The product boasts a compact structure, small size, light weight, and easy surface cleaning, facilitating daily maintenance and management. A terminal box is installed at the secondary output terminals, ensuring safety and reliability and effectively preventing wiring faults. The base plate includes a grounding bolt and six mounting holes, a rational design that allows for flexible installation and fixation to meet diverse installation needs.

Frequently Asked Questions (FAQ)

What is the rated insulation voltage of these current transformers?

The rated insulation voltages can reach up to 40.5/95/185kV (with specific models like the LZZB9-24 having a rated insulation level of 24/65/125kV), designed to withstand high-voltage environments.

What is the creepage distance of the LZZB9-35 and 40.5 type current transformers?

The creepage distance is as long as 851mm, which effectively prevents insulation breakdown and ensures safe, reliable operation.

What are the ambient temperature limits for normal service?

The transformer operates normally within an ambient temperature range of -5℃ to 40℃, with a daily average temperature not exceeding 30℃.

What kind of structure does this series of current transformers feature?

It features a fully enclosed epoxy resin casting structure, which provides excellent insulation, moisture resistance, and a compact, lightweight body.

How is the installation and wiring secured?

A terminal box is installed at the secondary output terminals to prevent wiring faults. Additionally, the base plate features a grounding bolt and six mounting holes for flexible, stable installation.

What is the rated secondary current for these transformers?

The rated secondary current is designed to be either 5A or 1A.