LZCT722-10 Electrical Cast Resin zct zero sequence Current transformer

zero sequence current transformer

LZCT722-10 bushing type current transformer is suitable forcurrent 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 bushing type current transformer through its internal poles quickly and uniformly.

 

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).

Parameters

Technical parameters 
Standards IEC60044-1; IEC 61869-2; NTC 2205; ANSI C57.13; GB1208-2006
Rated primary current 20-600A
Rated load ≤10VA
Rated frequency 50Hz or 60Hz
Rated secondary current 5A or 1A
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
Mechanical parameters 
Dimensions (W×D×H) (mm) φ182×φ130×55
Weight (kg) 2.3
Operating conditions 
Operating temperature -35°C to +55°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
20/1 0.5 0.75
30/1 1 1
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 12.5 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 12.5 20 3.75 5 10 5 7.5

Selection guide

 Model Primary rated current Rated load Aperture (mm) Description (mm) Weight (kg) Material Water-proof
LZCK-55 100-1500A ≤10VA φ55 180×138×52 2 ABS+Resin  IP65
LMCK185-10 300-3000A ≤25VA φ185 350×283×55 4.5 ABS+Resin  IP65
LZCK310-10 300-600A ≤10VA φ50 φ50 x φ110 x 32 1 Resin silicon case (option)
LZCK322-10 30-600A ≤10VA φ50 φ50 x φ110 x 52 1.6 Resin silicon case (option)
LZCK350-10 20-600A ≤25VA φ50 φ50 x φ110 x 105 3.1 Resin silicon case (option)
LZCK720-10 20-1000A ≤25VA φ60 φ80 x φ110 x 50 2.1 Resin silicon case (option)
LZCK2500-10 500-1500A ≤20VA φ120 φ120 x φ185 x 100 7 Resin silicon case (option)
LZCG530-10 30-600A ≤20VA φ45 φ45 x φ120 x 65 2.1 Resin silicon case (option)
LZCG930-10 100-1500A ≤25VA φ60 φ60 x φ155 x 60 3.6 Resin silicon case (option)
LZCT722-10 20-600A ≤10VA φ82 φ82 x φ130 x 55 2.3 Resin silicon case (option)

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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