>Product>CT & PT>Instrument Current Transformer>Medium Voltage Electrical Measuring Zct Zero Sequence Current Transformer
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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.
DESCRIPTIONThe 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 current transformers are strictly comply IEC60044-1, IEC 61869-2, NTC 2205, GB1208-2006, GB20840.2-2013, ANSI/IEEE C57.13.
■ Power Meter;
■ Energy meter;
■ MV switchgears;
■ Air switch cabinet;
■ Distribution boxes;
■ Power Quality meter;
■ Ring network cabinet;
■ Measuring instrument;
■ Protective relay device;
■ Current load monitoring;
■ Low voltage metering system;
■ Distribution power transformer monitor system;
■ Size:φ82xφ130x55;
■ Support Dual Ratio;
■ Using life more than 20 years;
■ Holding wire diameter: φ82mm;
■ Measurement range 0-1500A AC;
■ 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;
| Technical parameters | |
|---|---|
| Standards | IEC60044-1; IEC 61869-2; NTC 2205; ANSI/IEEE C57.13; GB1206-2006; |
| Rated primary current | 50-1500A |
| Rated load | ≤25VA |
| 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 |
| Insulation Class | E |
| Material | polyurethane +Silicon steel sheets+Enameled wire+ABS |
| Mechanical parameters | |
| Dimensions (W×D×H) (mm) | φ82xφ130x55 |
| 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. |
| Type | LZCT720-10 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |||||||
| Model | Primary rated current | Rated load | Aperture (mm) | Description (mm) | Weight (kg) |
|---|---|---|---|---|---|
| LZCK310-10 | 300-1000A | ≤10VA | φ50 | φ50 x φ110 x 32 | 1 |
| LZCK322-10 | 30-1000A | ≤10VA | φ50 | φ50 x φ110 x 52 | 1.6 |
| LZCK350-10 | 30-1000A | ≤25VA | φ50 | φ50 x φ110 x 105 | 3.1 |
| LZCK720-10 | 30-1000A | ≤25VA | φ80 | φ80 x φ110 x 50 | 2.1 |
| LZCK2500-10 | 30-3000A | ≤30VA | φ120，140，160 | φ120 x φ185 x 100 | 7 |
| LZCG530-10 | 30-1000A | ≤20VA | φ45 | φ45 x φ120 x 65 | 2.1 |
| LZCG930-10 | 30-1500A | ≤25VA | φ60 | φ60 x φ155 x 60 | 3.6 |
| LZCT722-10 | 30-1500A | ≤10VA | φ82 | φ82 x φ130 x 55 | 2.3 |
| LZCG2500-10 | 30-3000A | ≤30VA | φ120，140，160 | φ120 x φ185 x 100 | 7 |
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