The LZZBJ9-10A is an indoor medium voltage current transformer featuring cast-resin insulation, combining both metering and protection functions in a single unit. Designed for 50Hz AC power systems with rated voltages up to 12kV, it ensures accurate measurement and reliable protection performance.
The LZZBJ9-10 is a high-performance indoor current transformer featuring epoxy resin cast insulation and a fully enclosed structure. Designed for use in AC power systems operating at frequencies of 50–60 Hz with maximum voltages up to 12 kV, it provides accurate power measurement, reliable current monitoring, and effective relay protection.
Standards Compliance
Manufactured in accordance with GB 1208, JJG 1021, and IEC 60044-1, ensuring international quality and safety benchmarks.
| Model | LZZBJ9-10A | |
|---|---|---|
| Rated voltage | 10 kV |  |
| Maximum voltage | 12 kV | |
| Rated frequency | 50/60 Hz | |
| Power-frequency withstand voltage (primary to secondary and to earth) |
42 kV/1 min | |
| Power-frequency withstand voltage (secondary to secondary and to earth) |
3 kV/1 min | |
| Lightning impulse withstand voltage | 75 kV | |
Service Conditions
Installation: Indoor use only
Ambient Temperature: -15°C to +40°C (daily average not exceeding +30°C)
Altitude: ≤ 1,000 m
Humidity: Average relative humidity ≤ 95% over 24 hours
Pollution Level: Class II
Environment: Free from significant dust, smoke, corrosive gases, vapor, or salt; no severe vibration or impact
Structural Overview
The transformer is fully cast in epoxy resin, providing a compact and maintenance-free design
Primary terminals are clearly marked as P1 and P2; secondary terminals are labeled sequentially (e.g., 1S1, 1S2, 2S1, 2S2) for easy identification and wiring
