What Is Indoor Dry-type Current Transformerr？
Working Conditions of the Indoor Dry-type Current Transformer
- Altitude: less than 1000m;
- Ambient Temperature: -40℃ ~ +40℃.
- No violent mechanical vibration, no harmful gas or vapor, no electric or explosive, and no explosive dust in the location.
- Continuous operation voltage: 1.00 Un, long-term max, Over voltage: less.1 Un.
- Stable overcurrent (including harmonic current) less 1.3 in.
- With stand voltage: between terminal 2.15, time rated voltage for 10 seconds, between terminals, and container 42kV for 10 seconds.
Main Technical Data of the Indoor Dry-type Current Transformer
Note: Other special specification models are supplied according to user requirements
| Rated Primary Current(A) | Accuracy Class Combination | 0.2S | 0.2 | 0.5S | 0.5 | 10P10 | 10P15 | 10P20 | 1s Short-time Thermal Current(kA) | Rated Dynamic Stability Current(kA) |
| 5 | 0.2S/10P10、0.2S/10P15、0.2S/10P20、0.2/10P10、0.2/10P15、0.2/10P20、0.5/10P10、0.5/10P15、0.5/10P20、0.2S/0.2/10P10、0.2S/0.2/10P20 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 0.5 | 12.5 |
| 10 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 1 | 2.5 | |
| 15 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 1.5 | 3.75 | |
| 20 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 2 | 5 | |
| 25 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 2.5 | 6.25 | |
| 30 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 3 | 7.5 | |
| 40 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 4 | 10 | |
| 50 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 5 | 12.5 | |
| 75 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 7.5 | 18.75 | |
| 100 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 10 | 25 | |
| 150 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 15 | 37.5 | |
| 200 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 20 | 50 | |
| 300 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 30 | 75 | |
| 400 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 40 | 100 | |
| 500 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 50 | 75 | |
| 600 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 60 | 150 | |
| 800 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 1000 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 1200 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 1500 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 2000 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 2500 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 | |
| 3000 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 80 | 200 |
Why Choose ZHIMING's Indoor Dry-type Current Transformer?
High-Accuracy & Stable Performance
Our indoor dry-type current transformers are built with precision-wound coils and high-permeability cores, delivering exceptional accuracy for metering and protection applications. The optimized magnetic circuit design ensures low ratio error and phase displacement, maintaining consistent performance even under fluctuating load conditions.
Safe & Reliable Dry-Type Insulation
Adopting advanced epoxy resin casting technology, our current transformers eliminate the risk of oil leakage and fire hazards. The fully enclosed, solid insulation structure provides superior dielectric strength and moisture resistance, ensuring long-term safety and reliability in indoor distribution systems.
Compact & Low-Profile Design
Designed for space efficiency, our transformers feature a compact, modular structure that fits seamlessly into indoor switchgear and panel setups. The lightweight construction simplifies installation and maintenance, making them ideal for new builds and retrofits alike.
Wide Range of Accuracy Class Options
We offer a comprehensive range of accuracy classes (0.2S, 0.5, 10P) and rated primary currents to meet diverse application requirements. Whether for high-precision metering or reliable protection, our current transformers can be customized to suit your specific system needs.
Robust & Maintenance-Free Operation
Built to withstand harsh indoor operating conditions, our current transformers feature corrosion-resistant enclosures and durable materials. With no moving parts or consumable components, they require minimal maintenance, reducing long-term operational costs and downtime.
FAQ
What key advantages does your indoor dry-type current transformer offer over traditional oil-immersed models?
Our indoor dry-type current transformer eliminates the risk of oil leakage, fire hazards, and environmental pollution. With epoxy resin insulation, it delivers superior safety and reliability for indoor distribution systems, while requiring zero routine maintenance.
How do the accuracy classes of this current transformer support different application needs?
The current transformer is available in a full range of accuracy classes, including 0.2S/0.5S for high-precision metering and 10P10/10P15/10P20 for protection purposes. This versatility ensures compatibility with both billing-grade metering and system protection requirements.
What safety features are built into this indoor current transformer?
This indoor current transformer features a fully enclosed epoxy-cast structure and advanced internal protection. Individual fuses isolate faulty elements to prevent cascading failures, ensuring continuous operation and enhanced safety even under partial faults.
Can this current transformer withstand the short-circuit currents common in power systems?
Yes. The current transformer is designed with high mechanical and thermal stability, with rated short-time thermal and dynamic stability currents to meet standard power system requirements, ensuring safe operation even under severe short-circuit conditions.
Is this current transformer suitable for installation in compact indoor switchgear?
Absolutely. The compact, modular design of this current transformer allows seamless integration into standard indoor switchgear and panel setups. Its small footprint and lightweight construction make it ideal for both new installations and retrofits with limited space.
