Line choke (inlet) 4%, 3-phase for power up to 7.5 kW INS 3-16-400

Three-phase network choke – power supply protection and stabilization

The INS 3-16-400 network choke is a component dedicated to improving the quality of power supply in electrical installations. Its main task is to limit inrush currents when switching on receivers, which translates to increased device life and more stable operation of the entire installation. This is particularly important for electric motors, transformers and other devices with high power consumption. This choke is used both in new installations and during the modernization of existing ones.

Construction and application

The choke's construction is based on a winding made of copper (Cu), which ensures high conductivity and efficiency. Vacuum impregnation in class H varnish guarantees resistance to high temperatures and humidity, as well as long-term reliability. The choke is designed to operate in three-phase networks with a rated voltage of 3x400V and a frequency of 50Hz. The voltage drop on the choke is 4% of the rated voltage (Un). The INS 3-16-400 model is designed to work with loads up to 7.5 kW.

Key features and benefits

• Limitation of inrush currents: Reduces the load on the electrical network during the starting of motors and other receivers, protecting them from damage.
• Increased device life: Power supply stabilization extends the life of connected devices.
• Made of high-quality materials: Copper winding and class H impregnation ensure reliable operation in difficult conditions.
• Compliance with standards: Meets the requirements of EN/IEC 61558-2-20 and EN/IEC 60076-6 standards, guaranteeing safety of use.
• Wide range of applications: Ideal for use in industry, construction, as well as in commercial and home installations with strong receivers.
• High dielectric strength: Withstands a 3 kV voltage test for 1 minute, ensuring insulation safety.
• IP00 protection class: Designed for mounting in enclosures providing adequate protection against external factors.

Thanks to its construction and parameters, the INS 3-16-400 choke is an effective solution for improving power quality and protecting connected electrical devices – both for professionals involved in electrical installations and for end-users looking for reliable protection of their systems.