21.August
Overview of KOKS 24D11 Current Transformers: Reliable Solutions for Precise Measurement and Protection in Electrical Networks
The KOKS 24D11 current transformers are a modern solution for converting electrical currents in networks with voltages up to 20 kV. They are characterized by high accuracy and reliability, making them ideal for use in power systems and industrial AC installations. These transformers are specifically designed for transmitting measurement data and ensuring equipment protection, providing high stability and efficiency.
Main parameters
| Parameter name | Units | Parameters |
| Rated voltage | kV | 20 |
| Highest operating voltage | kV | 24 |
| Nominal alternating current frequency | Hz | 50 |
| Rated primary current | A | 500; 600; 750; 800; 1000; 1200; 1250; 1400; 1500; 1600; 1800; 2000; 2500; 2800; 3000; 3150; 3200; 3500; 3600; 4000; 5000; 6000 |
| Rated secondary current | A | 1 та/або 5 |
| Number of secondary windings | each | from 1 to 4 |
| Measurement winding accuracy class | 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5 | |
| Precision class of the winding for protection | 5P; 10R | |
| Rated secondary load | VA | 1; 1,5; 2; 2,5; 3; 5; 7,5; 10; 12,5; 15; 17,5; 20; 22,5; 25; 27,5; 30; 35; 40; 45; 50; 60; 75; 100; 125; 150 |
Key Advantages of KOKS 24D11 Transformers
Specialized Design: These transformers do not include a primary conductor but feature primary insulation, allowing them to be installed directly over a conductor or busbar. This makes them an optimal choice for generator terminals and other specialized applications.
Flexible Configuration: The KOKS transformers offer up to six secondary windings for models rated up to 17.5 kV or up to four windings for models rated up to 24 kV, allowing the equipment to be tailored for different applications.
Standards Compliance: The transformers adhere to multiple international standards (IEC, GOST, AS, BS, ANSI, VDE, CSN), ensuring versatility and meeting various customer requirements.
Operational Reliability: High-quality manufacturing and the use of epoxy compounds guarantee long service life and resistance to environmental conditions.
Applications
The KOKS 24D11 transformers are designed for current conversion in electrical networks with voltages up to 20 kV. They are used to transmit signals to measuring instruments and protection devices, as well as in industrial-frequency AC control systems. This equipment is optimally suited for installation in enclosed busbars and integrated switchgear.
Design and Functionality
KOKS transformers are constructed using high-quality epoxy compounds to ensure reliable insulation and durability. All versions feature standardized dimensions, simplifying installation and integration into existing systems.
A distinctive feature of KOKS transformers is their single-phase busbar design, where the busbar installed within the transformer serves as the primary winding. This reduces installation and operational costs while enhancing system efficiency.
The number of secondary windings can range from 1 to 5 (up to 10 secondary terminals), depending on the required measurement accuracy, protection level, short-circuit currents, and other technical parameters. This customization allows the transformer to be tailored to specific customer requirements, ensuring maximum efficiency and accuracy.
Installation and Operation
The transformers can be mounted in any orientation, making them convenient for various installation conditions. Standard fasteners with screws (M10 or M18, depending on the model) are used for mounting. All connections must be tightened to specified torque levels to ensure reliable and safe operation.
The secondary windings are protected by a terminal block with a plastic cover that can be sealed, providing additional protection against unauthorized access. All unused windings should be short-circuited and grounded during operation to ensure safe functionality.
Standards and Compliance
KOKS transformers are manufactured according to international standards such as IEC, VDE, ANSI, BS, GOST, and CSN, ensuring their compatibility with the requirements of most markets. Additional standards can be applied upon request.
KOKS current transformers are a high-tech solution for measurement and protection systems, offering flexible configuration, high reliability, and adherence to international standards. They are ideal for use in power and industrial networks, ensuring stable and safe operation of equipment.