High Performance 11KV Cast Epoxy Resin ZCT 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.
Parameters
| hnical 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
| 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) |
Order 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.
Outline Drawing
