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0102030405

LZZBJ9-12/150b/2(4) 12kV Indoor Cast Resin Current Transformer | MV CT for Switchgear Protection and Metering

A current transformer (CT) is an electrical device used to measure alternating current. It is widely used in power systems, industrial automation, and electrical monitoring. Its primary function is to convert large currents into smaller, measurable currents for use in instrumentation and protective devices.
The product execution standards are GB20840.1-2010 and GB20840.2-2014.

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Product Detail

Dimensional Drawing

Model and its meaning

Summarize

The LZZBJ9-12/150b/2(4) series current transformers are suitable for power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 10kV, and are used for electric energy metering, current measurement and relay protection.

One of the most attractive features of the LZZBJ9-12/150b/2(4) current transformer is its maintenance-free operation. In industries where downtime can result in significant financial losses, the ability to deploy a transformer that requires no special maintenance is a significant advantage. This feature not only reduces operating costs but also improves overall power system reliability. Users can be confident that the LZZ-10 current transformer will perform consistently without the need for frequent inspection or repair, enabling a more streamlined approach to energy management.

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

LZZBJ9-12/150b/2 type current transformer Technical Parameter Table

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZBJ9- 12/150b/2	5	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15	10/15	0.5	1.25
	10			1	2.5
	15			1.5	3.75
	20			2	5
	30			3	7.5
	40			4	10
	50			5	12.5
	75			7.5	18.75
	100			10	25
	150			15	37.5
	200			21	52.5
	300			24.5	61.25
	400			32	80
	500	0.2(0.5）/10P10 0.2(0.5）/10P15	10/15 10(15)/15	32	80
	600	0.2(0.5）/10P10 0.2(0.5）/10P15	10/15 10(15)/15	32	80
	800	0.2/10P10 0.5/10P10 0.2/10P15 0.5/10P15	15/20 15/20 15/15 20/15	50	125
	1000			50	125
	1200			50	125
	1250			50	125

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

LZZBJ9-12/150b/4 type current transformer Technical Parameter Table

Product model	Rated primary current	Accuracy level combination	Rated output	Rated short-term thermal current	Rated dynamic stability current
LZZBJ9- 12/150b/4	5	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.2S/0.5/10P10/10P10	10/10/15 10/10/15 10/15/15 10/10/15 10/10/10	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			21	52.5
	200			21	52.5
	300	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.2S/0.5/10P10/10P10	10/10/15 10/10/15 10/15/15 10/15/15 15/15/15	45	112.5
	400			45	112.5
	500			32	80
	600
	800
	1000	0.2/0.2/5P10 0.2/0.5/5P15 0.2/0.5/5P20 0.2/5P10/10P15 0.2S/0.5/10P10/10P10	10/10/20 10/15/15 10/15/15 10/15/20 15/15/20	50	125
	1200
	1250

Structure and characteristics

This series of current transformers are of fully enclosed structure with epoxy resin casting, featuring excellent insulation performance and moisture-proof capability. The product features a compact structure, small size, light weight and easy surface cleaning. A terminal box is installed at the secondary output terminal, which is safe and reliable. There are grounding bolts and six installation holes for installation on the product base plate.

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