You are here: Home > Products > MV CT & PT
The task of instrument transformers is to transform high currents and voltages proportionally and in-phase into small current or voltage values for measuring or protection purposes. Current transformers (CTs) may have multiple secondary windings with cores that are magnetically independent and can have varied characteristics. They can be configured with different types of cores for diverse accuracy needs, such as one for precise measurements and another for general protection purposes. Voltage transformers (VTs) typically have a single magnetic core and one secondary winding. Some VTs, especially those designed for single-phase systems, may also include an extra winding known as a residual voltage winding, which is used to detect earth faults.
| Operating voltage Um: | 12/24/40.5kV |
| Rated short-duration power-frequency withstand voltage Ud: | 42/65/95kV |
| Rated lightning impulse withstand voltage Up: | 75/125/185kV |
| Rated frequency: | 50/60Hz |
| Rated primary current IPN: | 5A to 4000A |
| Multi-ratio | 2x20 to 2x600 |
| Secondary current ISN: | 1/5A |
| Rated short time thermal current Ith: | 80kA or 100xIPN |
| Rated dynamic current Idyn: | 120kA or 2.5xIth |
| Core: | |
| Protection (Factor) | 5P10, 5P15, 5P20, 10P10, 10P15, 10P20 |
| Power Capacity | 10VA/15VA/20VA/30VA |
| Measuring (Accuracy) | 0.2/0.2S/0.5/0.5S/1/3 |
| Power Capacity | 10VA/15VA/20VA/30VA |
For example: Measuring only model 600A/5A, 0.2S, 10VA or multi-ratio 2x500A/5A, 0.2/0.5 10/15VA
Measuring with protection model: 600A/5A 0.2/10P10 10/15VA
Voltage Transformer
| Operating voltage Um: | 3.6/7.2/12/40.5kV |
| Rated short-duration power-frequency withstand voltage Ud: | 25/32/42/95kV |
| Rated lightning impulse withstand voltage Up: | 40/60/75/200kV |
| Rated frequency: | 50/60Hz |
| Rated thermal limiting output of the residual voltage winding: | 230VA/4A |
| Rated primary voltage maximum VPN: | 3kV, 6kV, 10kV, 40.5kV, 3/√3 V, 6/√3 V, 10/√3 V,40.5/√3 V |
| Secondary voltage USN: | 100V, 220V, 100/√3 V, 220/√3 V |
| Thermal limiting output Sth: | 200VA, 300VA, 400VA, 500VA, 600VA, 800VA, 1000VA |
| Auxiliary residual voltage winding | Without or 100/3V, 110V/3V, 120/3V |
| Rated output of the measuring winding | Class 0.2/0.5/1/3/5 |
| Rated output of the protection winding | 3P or 6P |
| Rated output of the power capacity | 10VA, 15VA,20VA, 30VA, 50VA, 60VA, 100VA,150VA, 200VA etc. |
For example: JDZ10-10A, 10/0.1KV, 100V, 0.2/30VA, Dual output voltage: JDZ10-10A, 10/0.1KV, 100/100V 0.2/0.5 10/15VA
JDZ10-10A 10/√3 / 100/√3 /100/3V 0.5/3P 15/20VA
WeChat
WhatsApp
We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our traffic. By clicking "Accept All", you consent to our use of cookies.
