The LZZBJ9-10A1 Current Transformer is a high-performance instrument transformer designed for precise measurement and protection in medium-voltage electrical systems. It is engineered with epoxy resin casting insulation, ensuring durability, reliability, and high insulation performance. This CT is widely used in power distribution networks, substations, and industrial applications where accurate current measurement and relay protection are required.
Overview
Current transformers (CTs) are essential components in modern electrical systems. The LZZBJ9-10A1 is an indoor-type CT designed to operate at rated voltages up to 12kV, 24kV, and 40.5kV, with a rated frequency of 50Hz or 60Hz. It provides precise current conversion for metering and protection, ensuring electrical system safety and efficiency.
Key Features:
- High-Quality Epoxy Resin Insulation: Ensures long service life and excellent dielectric properties.
- High Accuracy: Available in multiple accuracy classes for precise measurement and protection.
- Wide Range of Current Ratios: Suitable for various applications.
- Compact and Robust Design: Designed for reliable performance in harsh environments.
- Compliance with IEC Standards: Meets IEC 60044-1 standards for safety and reliability.
Operation Conditions
| Parameter | Specification |
|---|---|
| Rated insulation level | 12/42/75kV |
| Rated secondary current | 5A or 1A |
| Power frequency withstand voltage | 12kV |
| Rated frequency | 50Hz / 60Hz |
| Ambient temperature | -5°C to +40°C |
| Altitude | ≤ 1000m |
| Compliance standard | IEC 60044-1 |
Technical Data
| Rated Current Ratio (A) | Accuracy Classes (Measuring/Protection) | Rated Output (VA) | FS | ALF | 1s Short-Time Thermal Current (kA) | Rated Dynamic Current (kA) |
| 10-200/5 | 0.2(s)/0.2(s), 0.2(s)/0.5, 0.2(s)/10P, 0.5/10P | 10, 15 | 15 | 5 | (10) | 10 |
| 300/5 | 0.2s/0.5/10P, 0.2/0.5/10P | 15 | 15 | 10 | 15 | 20 |
| 400/5 | 0.2/0.5/10P | 15 | 15 | 10 | 31.5 | 80 |
| 500/5 | 0.2/0.5/10P | 20 | 20 | 10 | 31.5 | 80 |
| 600/5 | 0.2/0.5/10P | 20 | 20 | 10 | 40 | 100 |
| 800/5 | 0.2/0.5/10P | 20 | 20 | 10 | 50 | 125 |
| 1000/5 | 0.2/0.5/10P | 80 | 80 | 10 | 20 | 63 |
| 1200-1500/5 | 0.2/0.5/10P | 80 | 80 | 10 | 80 | 160 |
| 1500-2000/5 | 0.2/0.5/10P | 100 | 100 | 10 | 100 | 160 |
| 2000-3150/5 | 0.2/0.5/10P | 130 | 130 | 10 | 130 | 160 |
Applications
The LZZBJ9-10A1 Current Transformer is widely used in various electrical systems, including:
- Power Distribution Networks: Ensures accurate current measurement and protection.
- Substations: Provides reliable performance for voltage and current monitoring.
- Industrial Applications: Used in factories and manufacturing plants for electrical protection.
- Smart Grid Systems: Supports modern energy monitoring and management.
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FAQs
1. What is the primary function of the LZZBJ9-10A1 Current Transformer?
The primary function of the LZZBJ9-10A1 Current Transformer is to convert high primary currents into standardized low secondary currents for accurate metering and protective relaying in electrical power systems.
2. What are the available accuracy classes for this CT?
The LZZBJ9-10A1 offers multiple accuracy classes, including 0.2(s), 0.5, and 10P, making it suitable for both measurement and protection purposes.
3. Does this current transformer comply with international standards?
Yes, the LZZBJ9-10A1 complies with IEC 60044-1, ensuring international safety and performance standards.
The LZZBJ9-10A1 Current Transformer guide is a high-accuracy, durable, and reliable solution for electrical power monitoring and protection. Its advanced epoxy resin insulation, wide range of current ratios, and compliance with IEC standards make it an ideal choice for modern electrical systems. Whether for substations, industrial plants, or smart grids, the LZZBJ9-10A1 ensures optimal performance and long-term reliability.