LZZBJ9-24-180b/2 、 LZZBJ9-24-180b/4 Current Transformer

分类 High Voltage CT&PT

LZZBJ9-24-180b/2 and LZZBJ9-24-180b/4 are indoor epoxy resin cast current transformers designed for 24kV medium voltage power systems.

They are widely used for current measurement, electric energy metering and relay protection in indoor switchgear and substations, featuring high insulation performance, compact structure and reliable operation

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Product Details:

Introduction

LZZBJ9-24-180b/2 and LZZBJ9-24-180b/4 are indoor epoxy resin cast current transformers designed for 24kV medium voltage power systems. These current transformers are widely used for current measurement, electric energy metering and relay protection in indoor switchgear, substations and power distribution systems.

The transformers adopt high-quality epoxy resin vacuum casting insulation with excellent dielectric strength, compact structure, stable performance and long service life. They are suitable for frequency 50Hz/60Hz AC systems with rated voltage up to 24kV.

Product Features

High quality epoxy resin cast insulation
Excellent dynamic and thermal stability
Accurate current measurement and protection performance
Compact structure for switchgear installation
Maintenance-free operation
Flame retardant and moisture resistant
Suitable for indoor medium voltage applications
Complies with IEC and GB standards

Technical Data

– Rated insulation level: 24/65/125kV
– Rated secondary current: 5A or 1A
– Power frequency withstand voltage: 17.5kV, 24kV
– Rated frequency: 50/60Hz
– Ambient temperature: -5°C ~+40°C
– Altitude : ≤1000m
-Standard: IEC 60044-1, GB1208-200

Specification

LZZBJ9-24/180b/2

Rated transformer Ratio(A)	Secondary accuracy classes combination	Rated output (VA)			Measuring current’s instrument security factor	Protective current’s accuracy limit factor	Rated short-time thermal current (kA/S)	Rated dynamic current ( kA)
		Measuring		Protective
		0.2(S)	0.5	10P
20-200/5	0.2（S）/0.2(S) 0.2(S)/0.5 0.2(S)/10P 0.5/10P	10 15	15	15	5 (10)	10 15	150I1n	375I1n
300/5							31.5	80
400/5							31.5	80
500/5							40	100
600/5							50	125
800/5				20			63	125
1000/5							80	160
1250/5							80	160

LZZBJ9-24-180b/4

Three secondary single ratio

Rated transformer Ratio(A)	Secondary accuracy classes combination	Rated output (VA)			FS	ALF	Rated short-time thermal current (kA/S)	Rated dynamic current ( kA)
		Measuring		Protective
		0.2(S)	0.5	10P
15-30/5 20-40/5 ………. 500-1000/5	0.2S/0.5/10P 0.2/0.5/10P 0.5/0.5/10P 0.2S/10P/10P 0.2/10P/10P 0.5/10P/10P	15	15	10 15	5 (10)	10 15 20	100I1n	250I1n
600-1200/5							50	105
750-1500/5							63	130
800-1600/5							80	160
1000-2000/5							80	160
1250-2500/5							100	200

2.Three secondary double ratio

Rated transformer Ratio(A)	Secondary accuracy classes combination	Rated output (VA)			FS	ALF	Rated short-time thermal current (kA/S)	Rated dynamic current ( kA)
		Measuring		Protective
		0.2(S)	0.5	10P
15-300/5	0.2S/0.5/10P 0.2/0.5/10P 0.5/0.5/10P 0.2S/10P/10P 0.2/10P/10P 0.5/10P/10P	15	15	15 20	5 (10)	10 15 20	100I1n	250I1n
400/5 ~600/5							50	105
800-1000/5							63	130
1200/5							80	160
1500/5							80	160
2000/5							100	200
2500/5							125	200