Low-Voltage Outdoor Current Transformer

Product Parameters:

MODEL:Low Voltage Outdoor Current Transformer

· Outdoor epoxy resin current transformer
· Single Phase
· Rated voltage:  400V, 600V, 700V
· Metering class for CT: 0.2S, 0.2, 0.3, 0.5, 0.5S, 0.6
· Standard: IEC, ANSI, GB
· Type name: LMZW-0.66

 General
This Outdoor dry type current transformer used in 0.66kV, 0.75kV. power system, for measuring and protection.
It have been used in power line, or distrubution secondary output cable, and bay-installed switching stations.
The current transformer made from outdoor epoxy resin, amorphous alloy core for metering and high quality CRGO core for protection, primary and secondary use pure electrolytic copper.

Standard
All UNISUN Electric instrument transformers are in conformity with IEC standards, and recommendations IEC 61869. Transformers in conformity with specific country standards can also be supplied. (IEEE C57.13, NBR6855).

Specification data she

TypeRated current ratioPrimary ampere-turnRated output (VA)
0.513
LMZW-0.665,10,15,30,50,75,1501201010 
20,40,100,2002001010 
300~800300~8001010 

1000~3000

1000~3000

20

3050
  • Products can be customized by customer requirements, above data is standard data, customized data please contact us.
  • Products can be customized by customer requirements, above dimension may change, correct dimension please contact us.
 

Main Structure

A current transformer (CT) primarily consists of five major components: the iron core, the primary winding, the secondary winding, the insulation system, the housing, and the terminals. These components work together to achieve current transformation and electrical isolation.

  • Iron Core — Magnetic Flux Path
  • Primary winding — Series current-carrying
  • Secondary Winding — Inductive Output
  • Insulation—A Safety Barrier
  • Housing & Accessories

Primary winding

 

High electrolytic copper is used as primary winding, silver base welding material is used at the welding place, and semiconductor shielded paper is wrapped to ensure that the partial discharge tseting data is qualified.  

Secondary winding

 

Large capacity design secondary winding, automatic winding, high insulation and high purity enameled wire, to ensure wide capacity output under standard accuracy.

Suitable for direct use in outdoor power distribution and pole-mounted circuits

 * Specifically designed for outdoor low-voltage overhead lines, pole-mounted distribution boxes, photovoltaic grid-tie boxes, and streetlight metering boxes; can be installed close to utility poles or outdoor cabinets.

* Reduces secondary cable length and improves the quality of metering and protection signals.

Safety – Typically oil-free, non-flammable, with microcrystalline or epoxy encapsulation

* Non-flammable, non-explosive, and leak-free

* Suitable for installation in densely populated areas and near residential distribution transformers

Weather-resistant, moisture-resistant, and UV-resistant

* Withstands prolonged exposure to sunlight, rain, dew, and daily temperature fluctuations, outperforming indoor products sealed with epoxy alone.

Compact size, lightweight, and low cost

 * Low voltage rating – short insulation distance, compact design, and low cost

* Suitable for mass deployment in substations, photovoltaic systems, and the low-voltage side of charging stations

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