Medium-Voltage Current Transformers (3~7.2 kV)
ER-3C
About the Product
Designed to offer a higher rated current ratio, this indoor two-core epoxy-cast current transformer is suited to the main panel or the motor control panel of a 3.6kV (max.) power system and can be used in conjunction with measuring or monitoring instruments, or with protective relays. Insulated with Araldite® epoxy resin, the ER-3C has excellent moisture resistance and provides superior electrical performance. Easy to install, this current transformer also has a pleasing design.
Product Features
- Standards: JIS, IEC or IEEE*
- Indoor application; epoxy-cast model
- System Voltage: ≦ 3.6 kV
- Frequency: 50/60 Hz
- AC/BIL：10/40kV
- Rated Current Ratio: Single-ratio or dual-ratio types
- Approx. Weight: 11 kg
- Other standards and specifications upon request
Selection Table*
| Primary Current (A) | Secondary Current (A) | Burden / Accuracy | Ith (kA) | |
Core 1 | Core 2 | ||||
Single Ratio | 200〜400A | 5A or 1A | 5A or 1A | 15VA/5P10 + 30(15)VA/1.0(0.5) | Max. 25 kA/1S |
500〜800A | |||||
1000〜1200A | |||||
Dual Ratio | 200-400A | 5A or 1A | 5A or 1A | 15VA/5P10 + 30(15)VA/1.0(0.5) | Max. 25 kA/1S |
250-500〜400-800A | |||||
500-1000〜600-1200A | |||||
*Other standards and specifications available.
Downloadables
3kV Two-Core Epoxy-Cast Current Transformer (Model: ER-3C)
Easy-to-print document, containing product description and specifications.
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.