Network choke (inlet) 4%, 3-phase for power up to 45 kW INS 3-90-400

Three-phase line choke – power protection and stabilization

The INS 3-90-400 line choke is a key element of electrical installations, designed to limit short-circuit and harmonic currents in the power supply network. This 45 kW device is used to protect various loads, from electric motors to energy-consuming devices. Its task is to minimize disturbances in the network, which translates to a more stable power supply and longer life of connected devices.

Construction and parameters

The INS 3-90-400 choke is characterized by a solid construction based on a copper (Cu) winding, ensuring high conductivity and reliability. Vacuum impregnation in class H varnish guarantees resistance to high temperatures and humidity, allowing operation in harsh industrial conditions. Rated voltage of 3x400V and frequency of 50Hz make it compatible with most standard electrical installations. A voltage drop of 4% provides effective protection without excessive impact on the operating parameters of devices.

Application and benefits

Line chokes of this type are particularly recommended in applications where there are large pulse or harmonic loads, such as:

• Motor starting: Limit inrush currents during electric motor starting, protecting them from damage and extending their life.
• UPS power supplies: Stabilize the voltage supplying uninterruptible power supply (UPS) systems, ensuring reliable operation in the event of a power failure.
• LED lighting: Reduce interference generated by LED lighting drivers, improving the performance of these devices.
• Industry: In industrial plants, they protect sensitive electronic devices from overvoltages and disturbances in the power supply network.

Mounting a line choke translates to:

• Increased installation reliability: Protection against the effects of overvoltages and short-circuit currents.
• Reduction of electromagnetic interference: Improved power quality and more stable device operation.
• Extended device life: Protection against damage caused by incorrect power supply.
• Compliance with safety standards: Compliance with EN/IEC 61558-2-20 and EN/IEC 60076-6 standards ensures safe operation of the device.

Additional information regarding physical parameters (dimensions, weight) and detailed technical data for different rated current values are available in the manufacturer's catalog documentation (e.g. INDUCTO). It is worth noting the possibility of ordering a version with optional C2/E1 execution for increased overvoltage resistance.