20kV Multi-Ratio Current Transformers (Single-Core & Two-Core Options)
MV Window-Type Epoxy-Cast CT
About the Product
Designed to be installed in a switchgear panel of a 25 kV (max.) power system, these current transformers can be used in conjunction with measuring or monitoring instruments, or with protective relays. The insulation material for the core and the secondary coil is Araldite® epoxy resin. The window-type design facilitates installation and wiring with a busbar or insulated cables, decreasing the occurrence rate of contact point failure. With excellent insulation and a high degree of moisture resistance, the CR-20S Series current transformers can perform in locations of high humidity or moderate pollution. These lightweight and economic CTs are quick and easy to install.
- Standards: IEC or IEEE*
- Indoor application; window-type design
- System Voltage: ≤ 25 kV
- Frequency: 50/60 Hz
- AC/BIL: 50/125 kV
- Single-ratio and multi-ratio types
- 2-core options available
- Ith = Max 43.3kA/1S
* Other standards and specifications available.
- Related Products
EWF-20DA, EWF-20DB, EWF-20DD, EWF-20DE, EWF-20DS
For use in conjunction with energy meters or protective relays. Available in single-core, 2-core, and 3-core models. Insulated with Araldite® epoxy resin. Custom-made to meet various requirements.
2-core epoxy-cast current transformer for a ≦24kV power system. For use with measuring or monitoring instruments, and protective relays. “U-shaped top” design for safety and for a shorter distance between two current transformers installed side-by-side, thus reducing the required width of the switchgear panel.
2-core current transformer for a 20~24kV power system. Used in conjunction with measuring or monitoring instruments, and with protective relays. Epoxy cast. Designed to have greater creepage, it is appropriate for polluted regions.
Single-core and 2-core indoor window-type current transformers for power systems ≦ 15kV. Primary current: 500~3000A (single-ratio or multi-ratio). Araldite® epoxy resin. Used with measuring or monitoring instruments, or for protection.
When a power system is in operation, it is imperative that the secondary of the current transformer(s) should not have an open circuit. When an open circuit occurs, an extremely high transient voltage will be induced, which can in turn damage the current transformers and the instruments at the secondary, or even posing a threat to personal safety. This CT secondary overvoltage protector offers protection from such accidental damage caused by secondary transient voltage.
- Download Materials
Easy-to-print document, containing product description, specifications, and a selection table.
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.