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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 

Road, HuangHua LiuShi YueQing,

Zhe Jiang, CHINA


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 HY 121-30M-LA split core current transformer

HY 121-30M-LA split core current transformer


1:The structure of the self-locking, 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
4:Isolated plastic case recognized according to UL94-V0
5:Wires plugs,Audio plugs,Power plugs and so on five kinds of plugs


1:Current measurement, monitoring and protection

for electrical wiring and equipment.

2:Current and power measurement for electric motors, lighting, aircompressor,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  Characteristics
NO Item Specification
1 Primary Current (Arms 50/60Hz) 30A nom 75A max
2 Secondary Current at primary nominal (rms) 10mA
3 Primary/secondary currents ratio in the nominal range of primary current 3000Ts
5 Winding D.C.Resistance .at 25℃ ('Ω): 460ΩMAX
6 Burden resistive load of secondary winding 20Ω
7 Amplitude Error f(%) ±2%
8 Insulation between primary non-insulated wire, touching inside surface of the window, and secondary output must withstand AC rms voltage 1500V/1mA/1min
9 Impulse withstand voltage 1.2/50us 3500V
10 Temperature error of currents ratio <50ppm/K
11 Ambient operating temperature range _-20°C~70°C


Electrical  Characteristics
NO Item Describe
1 Housing ABS OR PC(BLACK)
2 Bobbin PBT
3 core Ferrite
4 Tap Polyethylene Terephthalate
5 Magnet Wire 2UEW
6 Leader wire UL1185 26#AWG BLACK +DC plug
Flame retardant UL94-V0
Approximate Weight 65g

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