LKP 70/110-I (IG)
The LKP 70/110-I (IG) type polymer suspension line insulators with bird protection are designed for securing and insulating bare conductors of overhead power transmission lines (PTL) operating at 110 kV AC with frequencies up to 100 Hz. They provide protection for birds against electric shock upon contact with the insulator and prevent PTL outages caused by electrical flashovers due to birds or contaminants flowing from the crossarm of the support. The use of these insulators eliminates the need for additional bird protection devices. They are suitable for operation in ambient temperatures ranging from -60 °C to +50 °C and comply with the climatic version and placement category UHL 1 according to GOST 15150. Manufactured in accordance with TU 3494-005-57966314-2006, these insulators meet the standards of GOST 28856, GOST R 55189, and IEC 61109.
Key technical specifications of the LKP 70/110-I (IG) insulators include:
- Rated voltage: 110 kV.
- Rated mechanical breaking load: 70 kN.
- Overall height: from 1205 to 1455 mm, depending on the model.
- Insulation height: from 1000 to 1230 mm.
- Leakage distance: from 2610 to 3780 mm.
- Withstand voltage of full lightning impulse: from 575 to 690 kV.
- Power frequency withstand voltage in dry conditions: from 335 to 430 kV.
- Power frequency withstand voltage under rain: from 305 to 380 kV.
- Power frequency flashover voltage in polluted and wet conditions: not less than 110 kV.
- Specific surface conductivity of pollution layer: from 10 to 50 μS/cm.
- Permissible pollution degree according to GOST 9920: from II to IV.
The insulators are available with various combinations of end fittings, including: "clevis-tongue" (SP), "clevis-clevis" (SS), "socket-tongue" (GP), and "socket-clevis" (GS).