LZCT722-10 electrical cast resin zct zero sequence current transformer

zero sequence current transformer

LZCT722-10 zero sequence current transformer is suitable for current measurement and microcomputer protection of electrical equipment in 10KV and 35KV AC power system. It is not only widely used in compact fully insulated ring net switch cabinets and load switch cabinet but also cable distribution boxes because of its small size, light weight, open feasibility and convenient. It is very convenient that the transformer can be directly installed at connected output and input cables.

 

New magnetic material amorphous alloy or permalloy is taken to be the core of the bushing type current transformer, which has high magnetic permeability, low saturation induction density and good stability. Therefore, the measuring accuracy is higher and the instrument security factor in lower. Since the high quality silicon steel sheet metal processed by advanced technology is taken to be the core of the protection windings, the accuracy limit factor will be higher.
The circular ring core and secondary windings are poured by quality epoxies resin or polyurethane or silicon rubber in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance. The cable can cross the window type current transformer through its internal poles quickly and uniformly.
All of our zero sequence current transformers are strictly comply IEC60044-1, IEC 61869-2, NTC 2205, GB1208-2006, GB20840.2-2013, ANSI/IEEE C57.13.

Outline drawing

Split core cast resin current transformer

Wiring diagrams

Split core cast resin current transformer

P1, P2 is primary polarity terminal, S1, S2 is secondary polarity terminal.
P2, S2 is homonymous terminals (subtractive polarity).

Features

  • Size: φ82xφ130x55;
  • Support dual ratio;
  • Holding wire diameter: φ82mm;
  • Measurement range 0-1500A AC;
  • Using life more than 20 years;
  • High precision 0.2s, 0.2, 0.5s, 0.5;
  • Easily installation, with mounting bracket;
  • High magnetic conductivity silicon steel material;
  • Secondary windings are vacuum poured by insulated resin;
  • IEC60044-1; IEC 61869-2; ANSI C57.13; NTC 2205; GB1208-2006;

APPLIATIONS

  • Power meter;
  • Energy meter;
  • MV switchgears;
  • Air switch cabinet;
  • Distribution boxes;
  • Power quality meter;
  • Measuring instrument;
  • Ring network cabinet;
  • Current load monitoring;
  • Protective relay device;
  • Low voltage metering system;
  • Distribution power transformer monitor system;
 

Parameters

Technical parameters
Standards IEC60044-1; IEC 61869-2; NTC 2205; ANSI/IEEE C57.13; GB1206-2006;
Class 0.2S, 0.2, 0.5S, 0.5, 1, 3, 10P10, 10P, 10P20
Rated primary current 50-1500A
Rated load ≤25VA
Rated frequency 50Hz or 60Hz
Rated short-time thermal current 40kA, 1S
Rated continuous thermal current 120%I1n
Secondary winding power-frequency voltage 3kV, 1min
Instrument security factor FS≤10
Insulation class A
Material Polyurethane+silicon steel sheets+enameled wire+ABS
Mechanical parameters
Dimensions (W×D×H)(mm) φ182×φ130×55
Jaw cable diameter (mm) 82
Weight (kg) 2.3
Operating conditions
Operating temperature -40°C to +70°C
Daily average temp <+40°C
Storage temperature -40°C to +70°C
Altitude <3500 meters
Condition No existence of severely begrimed, erosive and radioactive gas in the air. Permission of long-term operation under rated current.

Selection guide

Type LZCT722-10 LZCT722-10 LZCT722-10
Purpose Measuring current transformer Protection current transformer Double winding current transformer
Ratio Accuracy class and rated load (VA) Accuracy class and rated load (VA) Composite accuracy class and rated load (VA)
I1/I2 0.2S 0.2 0.5 10P15 10P10 10P5 0.5 1 10P10 10P5
50/1 2 0.75 2 1.5 0.6
100/1 3.75 1 1.5 2 2.5 0.75 1.5
200/1 2.5 5 1.25 2 3 1 2
300/1 2.5 3.75 5 1.5 2.5 3.75 1.5 3
400/1 3.75 5 7.5 1.5 3 5 1.5 3
500/1 5 7.5 10 2 3.5 5 1.5 3
600/1 7.5 10 2 3.75 7.5 1.5 3
75/5 2.5 2.5
100/5 3.75 3.75
200/5 3.75 7.5 2.5 6.25 3.75 2.5
300/5 3.75 5 10 2.5 5 5 2.5 5
400/5 5 7.5 15 2.5 5 7.5 3.75 6.25
500/5 7.5 10 15 3.75 5 7.5 3.75 6.25
600/5 7.5 10 20 3.75 5 10 5 7.5
750/5 7.5 10 20
800/5 10 15 20
1000/5 10 15 25
1200/5 15 15 25
1500/5 15 15 25

Selection guide

Model Primary rated current Rated load Aperture (mm) Description (mm) Weight (kg)
LZCK310-10 300-1000A ≤10VA φ50 φ50xφ110x32 1
LZCK322-10 30-1000A ≤10VA φ50 φ50xφ110x52 1.6
LZCK350-10 30-1000A ≤25VA φ50 φ50xφ110x105 3.1
LZCK720-10 30-1000A ≤25VA φ80 φ80xφ110x50 2.1
LZCK2500-10 30-3000A ≤30VA φ120, 140, 160 φ120xφ185x100 7
LZCK2500-10 30-3000A ≤30VA φ120, 140, 160 φ120xφ185x100 7
LZCG530-10 30-1000A ≤20VA φ45 φ45xφ120x65 2.1
LZCG930-10 30-1500A ≤25VA φ60 φ60xφ155x60 3.6
LZCT722-10 30-1500A ≤10VA φ82 φ82xφ130x55 2.3
LZCG2500-10 30-3000A ≤30VA φ120, 140, 160 φ120xφ185x100 7

Ordering information

Be sure to the type, current ratio, accuracy class, rated load and use of the products when you plan to make a order. Special specifications could be customized. All kinds of different specifications and parameters current transformers can be made according to your needs.

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