Medium-Voltage Current Transformers (3~7.2 kV)
EW-3C
About the Product
Often used with the main panel or the motor control panel of a 3.6kV (max.) power system, this indoor, two-core (core type: cut-core) current transformer is good for protection and is suited to measuring and monitoring instruments. Compact, easy to install, and insulated with Araldite® epoxy resin, this medium-voltage coil molded current transformer has a fine exterior and provides excellent electrical performance.
Specifications
- Standard: IEC or IEEE*
- Indoor application
- Coil molded
- High-grade silicon steel cores
- System Voltage: ≤ 3.6 kV
- Frequency: 50/60 Hz
- Ith: 16 kA/1S
- Current Ratio: ≦ 300A/5-5A
- AC/BIL: 10/40kV
- Approx. Weight: 9 kg
Coil Molded Current Transformers (Selection Table)
Model | System | Primary | Secondary Current | Burden / Accuracy | Ith | AC/BIL | Approx. | Num. Of Cores | |
Core 1 | Core 2 | ||||||||
EW-3S | 3.6 kV | 10~400A | 5A / 1A | – | 40VA/1.0 | 16 kA/1S | 10/40 | 5 | 1 |
EW-3C | 3.6 kV | 10~300A | 5A / 1A | 5A / 1A | 15VA/5P10 + 25VA/0.5 or 15VA/5P10 | 9 | 2 | ||
EW-10SH | 12 kV | 5~400A | 5A / 1A | – | 40VA/1.0 | 28/75 | 7 | 1 | |
* Other standards and specifications available
Downloadables
Coil Molded Current Transformers, EW Series
Including EW-3S, EW-3C, and EW-10SH. Production description, photos, and a selection table.
CT & PT Selection Guide: How to Choose a Current Transformer or Potential Transformer
How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.