| Application: | Electronic |
|---|---|
| Type: | Current Transformer |
| Phase: | Single |
| Operation Condition: | Indoor |
| Usage: | Protection, Measurement |
| Winding Form: | Single Layer & Tightly Wound Type |
| Customization: |
|---|
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Audited Supplier 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.
P1, P2 is primary polarity terminal, S1, S2 is secondary polarity terminal.
P2, S2 is homonymous terminals (subtractive polarity).
| 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. |
| 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 |
| 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) |
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