Product Overview
The LZZB6-12 / LZZB6J-12 indoor epoxy cast-resin current transformers are designed for 10kV, 11kV, and 12kV class medium-voltage switchgear. They provide reliable current measurement, energy metering, feeder monitoring, and relay protection in AC power systems at 50Hz/60Hz. The LZZB6J-12 variant features a reinforced housing, enhanced insulation, and higher short-time withstand capability.
The fully enclosed cast-resin construction supports cable or busbar-through installation, while secondary windings and magnetic cores are encapsulated for stable performance. LZZB6-12/J series meet IEC61869-2 international standards and GB20840 Chinese national standards.
Product Type
| Item | Specification |
|---|---|
| Product name | Indoor Epoxy Cast-Resin Current Transformer |
| Model | LZZB6-12 / LZZB6J-12 |
| Structure | Fully enclosed epoxy cast-resin, busbar/cable-through |
| Voltage class | 10kV / 11kV / 12kV |
| Rated insulation level | 12/42/75kV |
| Rated frequency | 50Hz / 60Hz |
| Rated secondary current | 5A or 1A |
| Rated primary current | 1500A – 5000A |
| Installation feature | LZZB6J-12 reinforced housing / higher short-time withstand |
| Typical application | Current measurement, energy metering, relay protection, high-current feeders |
Applications
- Indoor medium-voltage switchgear (10kV/11kV/12kV)
- High-current feeders and incoming/outgoing panels
- Relay protection circuits using 5P/10P class cores
- Energy metering and monitoring systems
- OEM and retrofit switchgear projects
Features
- Fully enclosed epoxy cast-resin body for insulation and mechanical stability
- Cable/busbar-through primary conductor; no wound primary coil
- Reinforced J-type housing: enhanced insulation and higher short-time withstand
- Supports 5A and 1A secondary outputs with multiple metering/protection combinations
- IEC61869-2 & GB20840 compliance for international projects
- External terminal box for safe wiring and inspection
Technical Parameters
| Rated
Current (A) |
Accuracy
Class / Protection |
Rated
Output (VA) |
Secondary
Current |
Remarks |
|---|---|---|---|---|
| 1500 | 0.2S / 0.5 / 5P10 / 5P15 | 15 / 20 / 30 / 30 | 5A | Busbar/cable-through, epoxy cast, reinforced J housing |
| 2000 | 0.2S / 0.5 / 5P10 / 5P15 | 15 / 20 / 30 / 30 | ||
| 3000 | 0.2S / 0.5 / 5P15 / 5P20 | 20 / 25 / 35 / 35 | ||
| 4000 | 0.2S / 0.5 / 5P20 / 5P25 | 30 / 35 / 40 / 40 | ||
| 5000 | 0.2S / 0.5 / 5P25 / 5P30 | 40 / 45 / 50 / 50 | ||
| 1500 | 0.2S / 0.5 / 5P10 / 5P15 | 10 / 15 / 20 / 25 | 1A | Busbar/cable-through, epoxy cast, reinforced J housing |
| 2000 | 0.2S / 0.5 / 5P10 / 5P15 | 15 / 20 / 25 / 30 | ||
| 3000 | 0.2S / 0.5 / 5P15 / 5P20 | 20 / 25 / 30 / 35 | ||
| 4000 | 0.2S / 0.5 / 5P20 / 5P25 | 25 / 30 / 35 / 40 | ||
| 5000 | 0.2S / 0.5 / 5P25 / 5P30 | 30 / 35 / 40 / 45 |
Installation & Terminals
Primary bus/cable enters the hollow aperture, marked P1. Secondary winding outlet ends marked 1S1 / 1S2 and 2S1 / 2S2. Equipotential lines connected through bus fenestrae. Four mounting holes included in cast-resin body. Suitable for XGN-10 type or similar metal-enclosed switchgear.