Shaanxi Longxiang Electrical Co., Ltd. is one of the most reliable manufacturers and suppliers of single phase 12kv indoor current transformer ct in China. With abundant experience, we are committed to providing high quality customized products with competitive price. Welcome to buy premium single phase 12kv indoor current transformer ct made in China here from our factory.
Product Overview
The LZZBJ9-10A is an indoor, single-phase, epoxy resin vacuum-cast, post-type current transformer. It is engineered for current measurement, energy metering, and relay protection in 10kV / 12kV medium-voltage indoor power systems, such as air-insulated switchgear ( KYN28) and ring main units (RMUs) operating at a rated frequency of 50Hz or 60Hz. it can be arbitrary combination of classes 0.2S, 0.2, 0.5 and 10P.
Normal Service Condition
- Installation site: Indoor
- Relative humidity: Daily average ≤ 95%, monthly average ≤ 90% (at +20 °C reference)
- Ambient temperature: Maximum air temperature 40°C: The minimum temperature is -5°C. The daily average temperature does not exceed 30°C
- Atmospheric conditions: There is no severe pollution in the atmosphere
- Environmental conditions: Free from corrosive gases or vapors; free from explosive or flammable media; no severe vibration, mechanical shock, or impact
- Altitude: Not exceeding 1000 m above sea level (higher altitude shall be specified with manufacturer)
Key Features & Advantages
Sealed & Cast Epoxy Resin Body
Made of high-grade epoxy resin via full vacuum casting. It delivers excellent resistance to moisture, dust and corrosion for an extended service lifespan.
Class 0.2S Precision Metering
Equipped with Class 0.2S high-precision metering cores. Accurate readings are guaranteed even at light loads, ideal for billing metering and substation monitoring.
Rated Insulation Level: 12kV
It features an insulation specification of 12/42/75kV (rated voltage / power-frequency withstand voltage / lightning impulse withstand voltage) for dependable performance within medium voltage distribution networks.
Compact Post Style Design
Space-saving layout plus well-arranged primary terminals enable easy installation and direct busbar connection inside standard indoor switchgears.
Wide Primary Current Selection: 5A–3000A
Primary rated current ranges from 5A to 3000A. Dual-core or multi-core secondary combinations (e.g. 0.2S/0.5/10P10) are available to handle metering and protection at the same time.
Current Transformer Technical Data
Rated insulation level : 12/42/75kV;
Rated secondary current : 5A or 1A;
The load power factor : cos ø = 0.8(lag);
Product standard : with GB20840.2-2014;
Pollution class : class Ⅱ;
The current transformers are in accordance with GB1208 and IEC61869-2 standards
|
Model |
Rated primary current (A) |
Accuracy level combination |
Rated output (VA) |
Rated short-time thermal current(kA/s) |
Rated dynamic stabilization current(kA) |
|
LZZBJ9–10A |
5 |
0.2(S) |
10 |
0.5 |
1.25 |
|
10 |
1 |
2.5 |
|||
|
15 |
1.5 |
3.75 |
|||
|
20 |
2.0 |
5.0 |
|||
|
30 |
3 |
7.5 |
|||
|
40 |
4.0 |
10 |
|||
|
50 |
5 |
12.5 |
|||
|
75 |
7.5 |
25 |
|||
|
100 |
10 |
25 |
|||
|
150 |
15 |
37.5 |
|||
|
200–600 |
45 |
112.5 |
|||
|
800–1200 |
63 |
130 |
|||
|
1500–3000 |
80 |
160 |
Company Certificates & Honors
Patents Certificates(Invention Patent, Utility Model Patent,Design Patent)
What Could We Do
Frequently Asked Quenstions
Q: Is LZZBJ9-10 an indoor or outdoor CT?
A: LZZBJ9-10 is an indoor epoxy cast current transformer, widely fitted in 10kV switchgear like KYN28A-12, XGN. Not for outdoor direct use.
Q: What is rated voltage of LZZBJ9-10 CT?
A: Rated insulation level 12kV (10kV class), power frequency withstand 42kV, lightning impulse withstand 75kV.
Q: What accuracy classes are available for LZZBJ9-10?
A: Metering/measurement: 0.2S,0.2,0.5S,0.5 (accuracy valid with specified VA burden); Protection: 5P10,5P20,10P10,10P20.
Q: Can we customize CT ratio for LZZBJ9-10?
A: Yes. Common ratios from 5/5 up to 1000/5. Secondary current standard 5A, 1A optional.
Q: What is installation type of LZZBJ9-10?
A: Busbar through-core type, mounted inside high voltage switch cabinet.
Q: What insulation material does LZZBJ9-10 adopt?
A: Solid epoxy resin cast insulation, dust-proof and moisture-proof for indoor cabinet.
Q: Is CT secondary open circuit allowed?
A: Strictly forbidden. Open circuit causes high overvoltage, damages CT and brings safety risk.
Q: LZZBJ9-10 VS LZW-10, what is the difference?
A: LZZBJ9-10: indoor cast CT for switchgear. LZW-10: outdoor CT for overhead lines, anti-rain & anti-pollution.
