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Product Application

The LDZC series indoor current transformers are suitable for current measurement, energy metering, signal sampling, and microcomputer protection of 0.66-10kV power supply and distribution equipment in AC power systems.
It features small size, light weight, and easy installation. It is widely used in various types of ring network cabinets, switch cabinets, combined substations, and cable branch boxes. It is also suitable for sampling units composed of RTU, FTU and other remote terminal equipment to provide accurate data measurement for the entire system.
With various installation methods and sizes, and customizable services, it offers flexible and versatile applications.

Execution Standard

GB/T20840.2-2014

Conditions of Use

● Ambient temperature: ﹣40℃ ~70℃, daily average temperature not exceeding 35℃;
● No obvious dust, smoke, corrosive gases, steam or salt spray;
● Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
● Altitude: not exceeding 1000m (Please specify the altitude when used in plateau areas).

Wiring Diagram

LDZC1-10

Product Specifications and Dimensions

Ф45/Ф100×40

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10
50				2.5
75			2.5	3.75
100			5	5			1.25
200	2.5	3.75	5	7.5		1.5	2.5
300	5	7.5	7.5	10	1.5	2.5	3.75
400	5	7.5	10	10	2.5	3.75	5
500	5	7.5	10	10	2.5	2.5	5
600	10	10	10	12.5	2.5	3.75	5

Dimensions

LDZC2-10

Product Specifications and Dimensions

Ф45/Ф100×80

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P10	10P5
30				2.5
50		1.5	2.5	5			1.5		1.5		2.5
75	1.5	2.5	3.75	5		1.5	2.5		5	1.5	2.5
100	2.5	3.75	5	5	1.5	2.5	3.75	1.5	5	2.5	5
200	5	7.5	7.5	10	2.5	3.75	5	2.5	5	2.5	5
300	7.5	10	10	12.5	5	5	10	5	5	5	10
400	7.5	10	12.5	15	5	7.5	10	5	5	10	20
500	10	10	15	15	7.5	10	15	7.5	10	10	20
600	10	15	15	15	7.5	10	15	10	15	10	20

Dimensions

LDZC3-10

Product Specifications and Dimensions

Ф45/Ф100×120

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P15	10P10
30				3.75
50		1.5	1.5	5			1.5		1.5		1
75	2.5	3.75	3.75	5			2.5		2.5		1.5
100	3.75	5	5	7.5	2.5	2.5	2.5	2.5	5	1.5	2
200	7.5	10	10	12.5	5	5	5	5	10	2.5	3.75
300	10	12.5	12.5	15	5	7.5	7.5	7.5	12.5	2.5	5
400	12.5	15	15	15	7.5	10	15	7.5	15	3.75	5
500	15	15	15	15	7.5	10	15	10	15	5	7.5
600	15	15	15	15	10	15	20	10	15	7.5	10

Dimensions

LDZC4-10

Product Specifications and Dimensions

Ф45/Ф120×65

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10
50				2.5
75			2.5	3.75
100			5	5			1.25
200	2.5	3.75	5	7.5		1.5	2.5
300	5	7.5	7.5	10	1.5	2.5	3.75
400	5	7.5	10	10	2.5	3.75	5
500	5	7.5	10	10	2.5	2.5	5
600	10	10	10	12.5	2.5	3.75	5

Dimensions

LDZC5-10

Product Specifications and Dimensions

Ф45/Ф120×100

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P20	10P10
30			2.5	3.75		1.5	2.5		1.5		1.5
50	1.5	2.5	3.75	5	1.5	2.5	3.75		2.5		2.5
75	2.5	3.75	7.5	7.5	2.5	3.75	5		3.75	1.5	3.75
100	5	7.5	10	10	3.75	5	7.5	2.5	5	2.5	5
200	10	15	20	20	7.5	10	15	3.75	7.5	5	10
300	20	20	25	25	10	15	25	5	10	7.5	10
400	25	30	30	30	15	20	30	7.5	12.5	10	15
500	30	30	30	30	20	25	40	10	15	10	15
600	30	30	30	30	25	30	50	15	15	15	20

Dimensions

LDZC6-10

Product Specifications and Dimensions

Ф45/Ф120×135

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P20	10P10
30			2.5	3.75		1.5	2.5		1.5		1.5
50	1.5	2.5	3.75	5	1.5	2.5	3.75		2.5		2.5
75	2.5	3.75	7.5	7.5	2.5	3.75	5		3.75	1.5	3.75
100	5	7.5	10	10	3.75	5	7.5	2.5	5	2.5	5
200	10	15	20	20	7.5	10	15	3.75	7.5	5	10
300	20	20	25	25	10	15	25	5	10	7.5	10
400	25	30	30	30	15	20	30	7.5	12.5	10	15
500	30	30	30	30	20	25	40	10	15	10	15
600	30	30	30	30	25	30	50	15	15	15	20

Dimensions

Keywords

indoor single-phase current transformer

The LDZC series indoor current transformers are suitable for current measurement, energy metering, signal sampling, and microcomputer protection of 0.66-10kV power supply and distribution equipment in AC power systems. They feature small size, light weight, and easy installation, making them widely applicable in various types of ring network cabinets, switchgear, combined substations, and cable branch boxes. They are also ideal for providing accurate data measurement to the entire system via sampling units composed of remote terminal units (RTUs) and field terminal units (FTUs). Multiple installation methods and dimensions are available, along with customized services, offering flexible and versatile application in a wide range of locations.

feherili@fhdq.com

+86-411-83117118

Product Application

Execution Standard

GB/T20840.2-2014

Conditions of Use

Wiring Diagram

LDZC1-10

Product Specifications and Dimensions

Ф45/Ф100×40

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10
50				2.5
75			2.5	3.75
100			5	5			1.25
200	2.5	3.75	5	7.5		1.5	2.5
300	5	7.5	7.5	10	1.5	2.5	3.75
400	5	7.5	10	10	2.5	3.75	5
500	5	7.5	10	10	2.5	2.5	5
600	10	10	10	12.5	2.5	3.75	5

Dimensions

LDZC2-10

Product Specifications and Dimensions

Ф45/Ф100×80

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P10	10P5
30				2.5
50		1.5	2.5	5			1.5		1.5		2.5
75	1.5	2.5	3.75	5		1.5	2.5		5	1.5	2.5
100	2.5	3.75	5	5	1.5	2.5	3.75	1.5	5	2.5	5
200	5	7.5	7.5	10	2.5	3.75	5	2.5	5	2.5	5
300	7.5	10	10	12.5	5	5	10	5	5	5	10
400	7.5	10	12.5	15	5	7.5	10	5	5	10	20
500	10	10	15	15	7.5	10	15	7.5	10	10	20
600	10	15	15	15	7.5	10	15	10	15	10	20

Dimensions

LDZC3-10

Product Specifications and Dimensions

Ф45/Ф100×120

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P15	10P10
30				3.75
50		1.5	1.5	5			1.5		1.5		1
75	2.5	3.75	3.75	5			2.5		2.5		1.5
100	3.75	5	5	7.5	2.5	2.5	2.5	2.5	5	1.5	2
200	7.5	10	10	12.5	5	5	5	5	10	2.5	3.75
300	10	12.5	12.5	15	5	7.5	7.5	7.5	12.5	2.5	5
400	12.5	15	15	15	7.5	10	15	7.5	15	3.75	5
500	15	15	15	15	7.5	10	15	10	15	5	7.5
600	15	15	15	15	10	15	20	10	15	7.5	10

Dimensions

LDZC4-10

Product Specifications and Dimensions

Ф45/Ф120×65

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10
50				2.5
75			2.5	3.75
100			5	5			1.25
200	2.5	3.75	5	7.5		1.5	2.5
300	5	7.5	7.5	10	1.5	2.5	3.75
400	5	7.5	10	10	2.5	3.75	5
500	5	7.5	10	10	2.5	2.5	5
600	10	10	10	12.5	2.5	3.75	5

Dimensions

LDZC5-10

Product Specifications and Dimensions

Ф45/Ф120×100

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P20	10P10
30			2.5	3.75		1.5	2.5		1.5		1.5
50	1.5	2.5	3.75	5	1.5	2.5	3.75		2.5		2.5
75	2.5	3.75	7.5	7.5	2.5	3.75	5		3.75	1.5	3.75
100	5	7.5	10	10	3.75	5	7.5	2.5	5	2.5	5
200	10	15	20	20	7.5	10	15	3.75	7.5	5	10
300	20	20	25	25	10	15	25	5	10	7.5	10
400	25	30	30	30	15	20	30	7.5	12.5	10	15
500	30	30	30	30	20	25	40	10	15	10	15
600	30	30	30	30	25	30	50	15	15	15	20

Dimensions

LDZC6-10

Product Specifications and Dimensions

Ф45/Ф120×135

Technical Parameters

● Rated frequency: 50HZ/60HZ
● Rated continuous thermal current: 120%ln
● Rated secondary current: 5A/1A
● Power frequency withstand voltage: 3kV/1min/50Hz
● Instrument safety factor: FS<10

Product Category	Measuring Current Transformer				Protection Current Transformer			Dual-winding Current Transformer
Rated Primary Current (A)	Accuracy Class and Rated Load (VA)
Rated Primary Current (A)	0.2S	0.2	0.5S	0.5	10P20	10P15	10P10	0.2	0.5	10P20	10P10
30			2.5	3.75		1.5	2.5		1.5		1.5
50	1.5	2.5	3.75	5	1.5	2.5	3.75		2.5		2.5
75	2.5	3.75	7.5	7.5	2.5	3.75	5		3.75	1.5	3.75
100	5	7.5	10	10	3.75	5	7.5	2.5	5	2.5	5
200	10	15	20	20	7.5	10	15	3.75	7.5	5	10
300	20	20	25	25	10	15	25	5	10	7.5	10
400	25	30	30	30	15	20	30	7.5	12.5	10	15
500	30	30	30	30	20	25	40	10	15	10	15
600	30	30	30	30	25	30	50	15	15	15	20

Dimensions

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