Electrical Current Transformer (CT) (Protective)

• Customization: Available
• Application: Metering
• Type: Current Transformer
• Model NO.: LZZBJ18
• Operation Condition: Outdoor
• Usage: Protection, Measurement
• Winding Form: Single Layer & Tightly Wound Type
• Insulating Medium: Epoxy Resin
• Installation: Extension Type
• Magnetic Circuit Structure: Single Stage Type
• Voltage Transformation Principle: Electromagnetic Type
• Transport Package: Export Box
• Trademark: DGG
• Origin: China
• HS Code: 8504311000
• Production Capacity: 100000PCS/Year

Product Description

General

This type of current transformer adopts epoxy-resin vacuum casting and a fully enclosed post structure, is applicable for power systems of rated frequency 50Hz or 60Hz and rated voltage up to and including 10kV, used for electric energy metering, current measurement, and relay protection, it can be an arbitrary combination of classes 0.2S, 0.2, 0.5 and 10P.
It complies with the standards GB20840.1-2010 Instrument transformers-Part1:General requirements, GB 20840.2-2014Instrument transformers-Part 2:Additional requirements for current transformers, and JJG313-2010 Instrument Current Transformers.


Use environment

1. Altitude: should not exceed 1000m
2.Ambient temperature:-5ºC~+40ºC
3. Air relative humidity:≤85%
4. Air relative site: outdoors.



Technical parameter

5.Insulation level:40.5/95/200kV
6.Power factor:cosφ=0.8(lag)
7. Rated secondary current: 5A or 1A
8. Rated frequency: 50Hz or 60Hz
9.Weight:112kg


Technical ratio
 

Single parameter ratio
Rated primary current(A)	Accuracy class	Rated output(VA)	Rated short-time thermal current(kA/s)	Rated insulation level(kA)
50	0.2S/0.5/10P10/10P10 0.2S/0.5/10P20/10P20	15/15/30/30 15/15/20/20	3.6	7.2
60			4.32	8.1
75			5.4	13.5
80			5.76	14.4
100			7.2	18
120			8.64	21.6
150			10.8	27
200			14.4	36
250			18	45
300			21.6	54
400			28.8	63
500			36	72
600			43.2	81
800	0.2S/0.5/10P30/10P30	15/15/20/20	57.6	120
1000-2000			72	144

 

Dual-ratio parameter
Rated primary current(A)	Accuracy class	Rated output(VA)	Rated short-time thermal current(kA/s)	Rated insulation level(kA)
50-100	0.2S/0.5/10P10/10P10 0.2S/0.5/10P20/10P20	15/15/30/30 15/15/20/20	7.2	18
60-120			8.64	21.6
75-150			10.8	27
80-160			11.52	28.8
100-200-300			14.4	36
150-300			21.6	54
200-400-600			28.8	72
250-500			36	90
300-600			43.2	108
400-800			57.6	120
500-1000			72	120
600-1200			72	144
800-1600			100	160

 

Three parameters
Rated primary current(A)	Accuracy class	Rated output(VA)	Rated short-time thermal current(kA/s)	Rated insulation level(kA)
50-75-100	0.2S/0.5/10P10/10P10 0.2S/0.5/10P20/10P20	15/15/30/30 15/15/20/20	7.2	18
75-100-150			10.8	27
100-150-200			14.4	36
150-200-300			21.6	54
200-300-400			28.8	72
300-400-500			36	90
200-400-600			43.2	108
400-600-800			57.6	120
500-600-800			57.6	144
600-800-1000			72	160