LMZJ1-0.5 Current Transformer

The LMZJ1-0.5 resin current transformers are primarily designed for indoor applications, suited for AC circuits with rated voltages of up to 0.5KV and frequencies of 50/60Hz. These transformers fulfill the roles of electric energy and current measurement, as well as relay protection. Encased in molded resin, they ensure robust performance and accurate readings.

Technical Parameters:

Serieslow voltage current transformer
Item Number LMZJ1-0.5
Rated Primary Current 75A to 6000A
Rated Secondary Current 5A
Rated Load 2.5/5/10/20/40VA
Accuracy Class 1.0, 0.5, 0.2, 0.5S, 0.2S
Rated voltage AC 0.66kV
Rated Frequency 50/60Hz
Casing Material resin
Installation busbar or floor mounting
Operating Temperature -40℃ to +50℃
Altitude ≤ 3000m
Power Frequency Voltage Endurance 3000V/1min
Operating humidity ≤ 80%
Function measurement of current and power; relay protection

Product Parameters:

ModelRatioHole DimensionsRated Burden Accuracy Class
LMZJ1-0.5 30I75/5A~300/5Aφ=30mm5VA1.0, 0.5, 0.2, 0.5S, 0.2S
LMZJ1-0.5 45I400/5A~600/5Aφ=45mm5~10VA1.0, 0.5, 0.2, 0.5S, 0.2S
LMZJ1-0.5 80*50I600/5A~1000/5A80*50mm5~10VA1.0, 0.5, 0.2, 0.5S, 0.2S
LMZJ1-0.5 100*50I1000/5A~2000/5A100*50mm10~20VA1.0, 0.5, 0.2, 0.5S, 0.2S
LMZJ1-0.5 130*60I2000/5A~3000/5A130*60mm15~30VA1.0, 0.5, 0.2, 0.5S, 0.2S
LMZJ1-0.5 180*90I4000/5A~6000/5A180*90mm20~40VA1.0, 0.5, 0.2, 0.5S, 0.2S

Drawings:

How to Choose a Current Transformer?

Window Size: according to the specification and number of busbars.

Rated Current Ratio: 1/3 larger than the measured primary current.

Rated Secondary Current: 5A or 1A. When the installation location of the instrument is far away from the current transformer or the loop load is large, please choose the secondary current of 1A.

Rated Burden: the measuring instrument is connected to terminals S1 and S2, and the total load of the connected circuit should not exceed the transformer’s rated load/burden.

Accuracy Class: for measurement—class 1.0, 0.5, 0.2, 0.5S, 0.2S; for protection—class 5P10, 5P20, 10P10, 10P20.

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