The PС120В 112W suspension glass insulator is designed for insulating and suspending conductors and ground wires at substations, power plants, and overhead transmission lines with direct and alternating current voltage above 1000 V and frequency from 50 to 100 Hz. The insulator operates within a temperature range from -60 °C to +50 °C and is manufactured according to TU 3493-004-99267582-2009.

Key technical specifications of the PС120В 112W insulator:

• Designation according to GOST 27661: U120B
• Designation according to IEC 60305: PС120В 112W
• Minimum mechanical failing load: 120 kN
• Minimum residual strength: 96 kN
• Diameter of the insulating part: 255 mm
• Height: 146 mm
• Nominal creepage distance: 407 mm
• Standard ball-and-socket coupling size according to GOST 27396, IEC 120: 16 mm
• Flashover voltage in insulating medium: 130 kV
• Power frequency withstand voltage (dry): 72 kV
• Power frequency withstand voltage (wet): 42 kV
• Impulse flashover voltage in air: 130 kV
• Standard lightning impulse withstand voltage: ±110 kV
• Nominal voltage at permissible radio interference level: 60 dB/kV at 20 kV; 86 dB/kV at 30 kV
• Weight: 4.4 kg