High-precision Cast Resin Straight-Through Current Transformer energy monitoring 30-1000A
LZCG series high precision current transformer is suitable for current measurement and microcomputer protection of electrical equipment in 10KV and 35KV AC power system. It is widely used in not only compact fully insulated ring network switchgears such as ABB-SafeRing/ SafePlus, Uniswitch, Schneider RM6, SM6, Siemens 8DJ10/8DH10, Simosec, FBX, Fluokit, Omar Garbo GA, GAE; SEL TPS(Q); VEI Unifluorc; Eaton SVS/12 ring network, but also cable distribution boxes because of its small size, light weight, openable and convenient installation.
It is very convenient that the transformer can be directly installed at the inlet and outlet cables. New magnetic material is taken to be the core of the current transformer, which has high magnetic permeability, low saturation magnetization and good stability. Therefore, the measuring accuracy is higher and the instrument security factor is lower. Since the high quality silicon processed by advanced technology is taken to be the core of the protection windings, which assured the accuracy limit factor is higher.
The semicircular ring core and secondary windings are vacuum poured by high quality epoxide resin in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance. Small size, light weight, small footprint, fixed in the ring network switchgear cable.
The cable can cross the current transformer through its internal poles quickly and uniformly.
The current transformers can be divided several kinds according to the various current ratio, accuracy and rated loads. The specific parameters are showed in the corresponding to each model parameter tables.
OUTLINE DRAWING
WIRING DIAGRAMS
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 |
30-1000A |
| Rated load |
≤30VA |
| 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) |
φ60×φ155×60 |
| Weight (kg) |
3.6 |
| 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 |
| Rated primary current (AMP) |
Accuracy class and rated load(VA) |
Accuracy class and rated load(VA) |
Composite accuracy class and rated load(VA) |
| 0.2S |
0.2 |
0.5 |
10P20 |
10P15 |
10P10 |
0.2S |
0.5 |
10P15 |
10P10 |
| 30 |
|
|
2 |
|
|
|
|
|
|
|
| 40 |
|
|
2.5 |
|
|
|
|
|
|
|
| 50 |
|
|
3.75 |
|
|
2 |
|
|
|
|
| 75 |
|
3.75 |
5 |
|
2 |
3.75 |
|
|
|
|
| 100 |
2.5 |
5 |
7.5 |
|
2.5 |
3.75 |
|
|
|
|
| 150 |
5 |
7.5 |
10 |
2.5 |
3.75 |
6.25 |
2.5 |
3.75 |
|
2.5 |
| 200 |
7.5 |
10 |
15 |
3.75 |
5 |
7.5 |
5 |
7.5 |
|
3.75 |
| 300 |
10 |
15 |
20 |
5 |
7.5 |
10 |
7.5 |
10 |
2.5 |
5 |
| 400 |
15 |
20 |
25 |
6.25 |
7.5 |
15 |
10 |
12.5 |
3.75 |
5 |
| 500 |
20 |
25 |
25 |
6.25 |
7.5 |
15 |
15 |
15 |
3.75 |
5 |
| 600 |
20 |
30 |
30 |
7.5 |
10 |
20 |
15 |
20 |
3.75 |
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.
