The PS70I R 112W suspension glass insulator is designed for insulating and securing conductors and ground wires on overhead power transmission lines, as well as in distribution devices of power plants and substations with alternating current voltages above 1000 V and frequencies up to 100 Hz. The insulator operates in ambient temperatures ranging from -60 to +50 °C and complies with the UHL 1 version according to GOST 15150. It is manufactured according to TU 3493-004-99267582-2009 and meets the requirements of GOST 6490-2017.

Technical specifications:

• Insulator designation according to GOST 27661: PS70I 112W
• Insulator designation according to IEC 60305: U70BL
• Rated mechanical breaking load: 70 kN
• Rated mechanical residual breaking strength of the insulator: 56 kN
• Nominal diameter of the insulating part: 255 mm
• Nominal structural height: 146 mm
• Nominal leakage path length: 407 mm
• Standard ball-and-socket coupling according to GOST 27396 (IEC 120-84): 16 mm
• Breakdown voltage in insulating medium: 130 kV
• Withstand voltage at 50 Hz (dry): 72 kV
• Withstand voltage at 50 Hz (wet): 42 kV
• Impulse flashover voltage in air: 256–290 kV
• Withstand voltage of standard lightning impulse: ±110 kV
• Nominal voltage at permissible radio interference level: 34 dB/kV at 10 kV; 55 dB/kV at 18 kV; 75 dB/kV at 25 kV; 80 dB/kV at 30 kV
• Weight: 4.2 kg