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HEYI Electrical CO.,LTD

Contact person: Bethy

Position: Sales Manager

Tel: 86-577-62659558

Fax: 86-577-61712987

Mobile: 86-13968747975


Skype: bethycai

ADD: #21 ShangYou North 

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 LMZJ1 Series current transformer

LMZ and LMZJ ranges of current transformers are mainly used indoors. For a rated voltage of 0.5kV and below,

rated frequency of 50Hz AC circuit as the current energy measurement or relay use.

They’re pouring type current transformers, the installation method uses a fixed plate.


1:Safe, easy to install, portable
2:Wide inner window, allowing clamping of big cables or bus-bars
3:Wide range of sizes to accommodate all the existing installations


1:Current measurement, monitoring and protection for electrical wiring and equipment.

2:Current and power measurement for electric motors, lighting, air compressor, heating and ventilation system,

air-condition equipment and automation-control system.

3:Current, power and energy monitoring device.
4:Relay protection device.

Technical Index:

Electrical Parameter
Mechanical Parameter
Frequency 50/60Hz Case PC/UL94-V0
Rated Input 5A-5000A Bobbin PBT
Measuring range 5%In-120%In Core Silicon steel
Rated Output 1A,5A Construction Screw
Ratio Voltage 0.72KV (AC) Operating Temp -25℃~+75℃
Dielectric strength 3.0KV/1mA/1min Operating Humidity ≤85%
Insulation Resistance DC500V/100MΩ min Output Connection Terminal

Technical Parameter:

Model Primary / Secondary Busbar Hole Dimensions(mm) Rated Burden (VA) Accuracy Class Rated Voltage
LMZJ1-0.5  30 5/5A~300/5A Φ=31mm
2.5~5 0.2S  0.5S  0.5 0.72KV(AC)
LMZJ1-0.5  35 5/5A~300/5A Φ=35mm
2.5~5 0.2S  0.5S  0.5
LMZJ1-0.5  40 200/5A~500/5A Φ=42mm
5 0.2S  0.5S  0.5
LMZJ1-0.5  50 400/5A~600/5A Φ=56mm
0.2S  0.5S  0.5
LMZJ1-0.5  80 750/5A~1200/5A Φ=83mm
10~20 0.2S  0.5S  0.5
LMZJ1-0.5  100 800/5A~2000/5A
10~30 0.2S  0.5S  0.5 0.72KV(AC)
LMZJ1-0.5  140 2000/5A~4000/5A Φ=142mm
15~30 0.2S  0.5S  0.5 0.72KV(AC)
LMZJ1-0.5  180 5000/5A~6000/5A Φ=182mm
15~30 0.2S  0.5S  0.5 0.72KV(AC)

Dimension of case (mm):

Model H h D d a b
LMZJ1-0.5 30
113mm 70mm 86mm 31mm / /
LMZJ1-0.5 35
114mm 70mm 88mm 31mm 10mm 36mm
LMZJ1-0.5 40
115mm 70mm 90mm 36mm 10mm 42mm
LMZJ1-0.5 50
127mm 75mm 96mm 50mm 12mm 56mm

Model A1 A2 B h H L1 L2 C b
LMZJ1-0.5 80
145mm 83mm 45mm 80mm 100mm 125mm 115mm 50mm 50mm
LMZJ1-0.5 100
175mm 102mm 45mm 102mm 120mm 143mm 123mm 50mm 70mm
LMZJ1-0.5 140
210mm 142mm 45mm 117mm 150mm 162mm 150mm 50mm 90mm
LMZJ1-0.5 180
260mm 182mm 45mm 125mm 190mm 185mm 162mm 50mm 110mm

Current Transformer installation way

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