Network choke (inlet) 4%, 3-phase for power up to 75 kW INS 3-150-400

Network choke for protecting inverters and reducing harmonics

This three-phase network choke, with a power of up to 75 kW, is a key element of power supply systems for inverters and other power electronic devices. Its task is to limit inrush currents during start-up and reduce harmonics that can negatively affect device operation and network stability. Installing an input choke is an investment in the reliability and long life of connected receivers.

Construction and application

The INS 3-150-400 choke is designed to operate in 3x400V AC systems at a frequency of 50Hz. Its construction based on a copper winding, protected by vacuum impregnation in class H varnish, guarantees high durability and resistance to environmental conditions. This choke is primarily used in drive systems, where it protects inverters from disturbances from the power supply network. The voltage drop on the choke is 4% at full load, which is a typical value for this type of device.

Key features and benefits

• Limitation of inrush currents: Reduces network load during the start-up of motors and other devices with high power demand. This translates to more stable voltage and reduced risk of damage.
• Harmonic reduction: Minimizes disturbances generated by inverters, improving energy quality in the network and protecting other devices.
• Durable construction: Copper winding and class H varnish impregnation ensure reliable operation even in harsh industrial conditions.
• Thermal protection (optional): Possibility of equipping with a bimetallic thermal overload protector for additional protection against overheating.
• Easy installation: Equipped with eyelet terminals for easy connection to the electrical installation.
• High quality workmanship: Compliance with EN/IEC 61558-2-20 and EN/IEC 60076-6 standards confirms the high quality of the product.
• Compact dimensions: Dimensions of 240 x 210 x 116 mm allow for easy adaptation to existing infrastructure. The weight of the device is approximately 24.5 kg.
• Insulation class F (155°C): Ensures safe operation at elevated ambient temperatures (up to 40°C).

The INS 3-150-400 choke is a solid solution for installers and users looking for reliable protection of their power electronic devices. Its installation allows for improved energy quality, increased inverter durability and reduced risk of failures related to disturbances in the power supply network.