The LKP 120/220-I (IG) polymeric suspension line insulators are designed to protect birds from electric shock upon contact with the insulator. Their use prevents power line outages caused by electrical flashovers due to birds and contaminants flowing onto the insulators from the crossarm. Utilizing LKP insulators eliminates the need for additional bird protection devices. They are intended for securing and insulating uninsulated conductors of 10-35 kV AC power lines with a frequency up to 100 Hz, operating in ambient temperatures ranging from -60 to +50 °C. The climatic design and placement category comply with UHL 1 according to GOST 15150. These insulators are manufactured in accordance with TU 3494-005-57966314-2006 and meet the standards of GOST 28856, GOST R 55189, and IEC 61109.