Product Overview
Indoor 10kV Cast Resin Current Transformer from a Leading Chinese Manufacturer
Equipped with epoxy resin casting insulation, the 10kV indoor high-voltage current transformer converts high primary currents into low secondary signals that can be safely measured in MV distribution and switchgear systems. With a cast resin body, it offers high degree of insulation, as well as overcoming adverse environment and mechanical influences.
Applications & circuit protection
The indoor CT is appropriate for applications involving 10kV switchgear, distribution panels, and substation secondary circuits where there is a need for exact current conversion and dependable insulation.
- MV switchgear: Current measurement for protection and measurement purposes.
- Distribution panels: Feeder and transformer current sensing function.
- Substation applications: Secondary circuits used for relays and instruments.
- OEM equipment: CT for switchgear and packaged assemblies.
Construction & operating reliability
Casting of epoxy resin ensures that the windings are embedded within the epoxy resin, making it possible for the CT to deliver excellent dielectric properties, dimensional stability, and durability against humidity and dirt conditions that occur in normal indoor environments.
- A wide range of primary current rating of from 100A to 1000A.
- A secondary output of either 5A or 1A or even classes of 0.5/1.0 or 5P/10P.
- High quality connections for easy secondary wiring.
- Compact design ideal for a standard switchgear apparatus.
Technical Parameter
| Parameter | Value |
| Rated voltage | 10 kV |
| Rated primary current | 100 / 200 / 400 / 630 / 1000 A |
| Rated secondary current | 5 A or 1 A |
| Accuracy class | 0.5, 1.0 (metering); 5P, 10P (protection) |
| Insulation | Epoxy resin casting, indoor |
| Rated frequency | 50/60 Hz |
| Application | MV switchgear metering and protection |
Instrument Transformer Cost & Quote
Please provide the ratio, accuracy rating, and number of pieces you require for us to generate a quote for Cast Resin Current Transformer. Discounts are available for switchgear and panel manufacturers.
- Quotation based on technical specifications
- OEM and private label services available
- Quick delivery of conventional models
CT Wiring & Secondary Connection
The Cast Resin Current Transformer has properly identified primary and secondary terminals. Make sure that the secondary circuit is connected to the a meter or relay in the correct way and the secondary circuit must never be left open when the transformer is energized.
- P1/P2 and S1/S2 indications for correct wiring conventions
- Polarity conventions to ensure proper connections
- Secondary short-circuiting options are available on request
Compare CT Options
Choose the instrument transformer that fits your scheme:
| Feature | This CT | Alternative |
| Ratio | As specified | Other ratios available |
| Accuracy | Per class | 0.2 / 0.5 / protection class |
| Insulation | Epoxy cast / oil | Indoor or outdoor design |
| Application | Metering / protection | Multi-ratio or special duty |
Export Markets & Country Compatibility
Instrument transformers are sent to manufacturers and dealers of switchgear, which are specified to the standards, accuracies and ratios applicable in each particular country.
CT Dimensions, Weight & Packing
The size and weight of the device depend on the type of insulation, and installation process. The units are designed for either saw panel or cable mounted installation, while terminals are safe during shipping, thus providing the expected performance. The drawings with dimensions are provided in the technical information.
- Compact design for panel mounting devices
- Terminals secure during transit
- Dimensions diagram supplied based on the model
Standards & certifications
Developed in accordance with IEC 60044-1 / IEC 61869, this CT is offered with type-test and routine-test certification for project approval.
- Manufacturing standard: IEC 60044-1 / IEC 61869 series.
- Indoor insulation class 10 kV.
- Tested accuracy for metering and protection classes.
- Signature and designation of terminals according to the standard.
OEM & B2B supply support
Subian Electric, as a power equipment manufacturer and factory supplier, partners with switchgear manufacturers, distributors, and utilities to provide CT supply, sampling, and technical support.
Provide us with your specifications and quantity to confirm the right configuration, design custom ratios, burdens or secondaries.
- Samples available for testing.
- Choosing the right quantity depending on your project and needs.
- OEM / ODMhelping you with technical documents and certifications.
Frequently Asked Questions
What are the available ratios?
Common primary currents include 100A, 200A, 400A, 630A, and 1000A, with a secondary output of either 5A or 1A. Other ratios can be customized according to customer requirements.
What accuracy classes are offered?
Measurement and metering applications are typically done in classes 0.5 and 1.0. In the case of protection relay applications, classes 5P and 10P are used.
Why is epoxy resin casting used?
Epoxy casting provides strong insulation, good creepage performance, and high mechanical reliability, which are suitable for demanding conditions of indoor MV environments.
Can I order custom specifications?
Yes. Custom ratios, burdens and terminal arrangements can be offered in OEM projects. Get in touch with us describing the details of your requirements.
