LKZB-0.5 (LBD-LCT) Zero Sequence Current Transformer
Overview The LKZB-0.5 (LBD-LCT) Zero Sequence Current Transformer, is a premium indoor device engineered for 35kV cable head applications. Certified by the Power System Automation Equipment Quality Inspection and Testing Center, this transformer is designed for relay protection in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage range of […]
Overview
The LKZB-0.5 (LBD-LCT) Zero Sequence Current Transformer, is a premium indoor device engineered for 35kV cable head applications. Certified by the Power System Automation Equipment Quality Inspection and Testing Center, this transformer is designed for relay protection in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage range of 6-35kV. Its precision, high sensitivity, and reliable performance make it a versatile solution for industries such as power, metallurgy, coal, railways, petroleum, chemical, and construction materials. The transformer is available in both circular and square designs, ensuring adaptability to diverse application needs.
LKZB-0.5 Zero Sequence Current Transformer is Constructed with a durable ABS engineering plastic housing and fully resin-cast for complete sealing, the transformer offers excellent insulation performance and operational reliability. It supports a wide range of system configurations, including grounded, ungrounded, high-resistance grounding, low-resistance grounding, and arc suppression coil grounding. Additionally, the transformer is compatible with both electromagnetic relay protection systems and modern electronic or microcomputer-based protection devices, making it ideal for complex power systems.
Type Designation of LKZB Current Transformer
The type designation for the LKZB-0.5, LBD-LCT Zero Sequence Current Transformer is as follows:
- L: Current transformer
- k: Used for protection
- Z: Casting resin insulated
- B: Open-close type
- 0.5 (LBD-LCT): Voltage grade (kV)
This designation clarifies the product’s specifications and applications.
Construction Overview LKZB-0.5 current transforme
The LKZB-0.5 Zero Sequence Current Transformer is designed with an open-close structure, utilizing a robust epoxy resin encapsulation for superior insulation and durability. During installation, the transformer can be separated into two halves, enabling the primary busbar to pass through the central aperture. Once positioned, the halves are securely fastened with bolts to ensure dependable performance and operational stability. The base of the transformer is equipped with two mounting holes for easy installation. Available in five internal diameter options—φ60, φ80, φ100, φ150, and φ180—this design provides flexibility to accommodate various system requirements.
Technical Data for LKZB-0.5 Zero Sequence CT
- Insulation Performance:The primary main insulation is ensured by the cable itself. The product is tested only for the insulation performance of the secondary winding, which can withstand a power frequency test voltage of 3kV to ground.
- Rated Specifications:The rated current ratio, accuracy class, and rated output are detailed in the table below:
| Rated Current Ratio (A) | Accuracy Class | Rated Output (VA) |
|---|---|---|
| 50/1 | 10P10 | 1 |
| 75/1 | 10P10 | 1.6 |
| 100/1 | 10P10 | 2.5 |
| 150/1 | 10P10 | 5 |
| 200/1 | 10P10 | 5 |
| 300/1 | 10P10 | 5 |
| 400/1 | 10P10 | 5 |
| 600/1 | 10P10 | 5 |
For specific requirements or custom configurations, please contact our technical team for tailored solutions.
Outline and Installation Dimensions
Dimensions for LKZB-0.5 Zero Sequence Current Transformer
Table of Dimensions and Specifications
| Type | Inner Hole Diameter (φ) |
Width (L) |
Height (H) |
Thickness | Base Size | |
|---|---|---|---|---|---|---|
| Bolt Specification |
Center Distance |
|||||
| LCT-4 | 120 | 260 | 230 | 55 | M × 25 | 110 ± 0.5 |
| LCT-3 | 100 | 260 | 230 | 55 | M × 25 | 110 ± 0.5 |
| LCT-2 | 80 | 210 | 200 | 55 | M × 25 | 110 ± 0.5 |
For inner diameters ranging from 80mm to 240mm, and for custom requirements exceeding 200mm, our technical team can provide tailored solutions to meet specific needs. Please contact us for further assistance.
FAQs for LKZB-0.5 Zero Sequence Current Transformer
- What are the main applications of the LKZB-0.5 Zero Sequence Current Transformer?
The transformer is used for zero-sequence current measurement, relay protection, and energy metering in power systems across industries like power, metallurgy, coal, and railways. - What voltage levels does the LKZB-0.5 support?
It supports systems with rated voltages of 6kV to 35kV and frequencies of 50Hz or 60Hz. - What are the available inner diameters for the LKZB-0.5 transformer?
The transformer is available in internal diameter options of φ60, φ80, φ100, φ150, and φ180, with custom sizes up to 240mm available on request. - Is the LKZB-0.5 transformer compatible with modern protection systems?
Yes, it is compatible with both electromagnetic relay protection systems and electronic or microcomputer-based protection devices. - What materials and design ensure the durability of the LKZB-0.5?
The transformer features ABS engineering plastic housing and a fully resin-cast structure, offering excellent insulation and resistance to environmental factors like moisture and pollutants.
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