Medium-Voltage Current Transformers (3~7.2 kV)
EW-3S
About the Product
Intended for measuring or monitoring instruments, this coil molded current transformer for indoor use is insulated with Araldite® epoxy resin. Often used with the main panel or the motor control panel of a 3.6kV (max.) power system, this current transformer is compact and easy to install. It features a fine exterior and excellent electrical performance.
Specifications
- Standard: IEC or IEEE*
- Indoor application
- Coil molded
- High-grade silicon steel core
- Rated Voltage: ≦ 3.6 kV
- Frequency: 50/60 Hz
- Ith = 16 kA/1S
- AC/BIL: 10/40kV
- Current Ratio: ≦ 400/5A
- Burden / Accuracy: 40VA/1.0
- Approximate Weight: 5 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.