The PС120Б 212W suspension glass insulator is designed for insulating and securing conductors and ground wires on overhead power lines, as well as in distribution devices of power plants and substations with alternating current voltage above 1000 V and frequency up to 100 Hz. The insulator operates in ambient temperatures ranging from -60 °C to +50 °C and complies with the UHL 1 category according to GOST 15150. The product is manufactured according to TU 3493-004-99267582-2009 and meets the requirements of GOST 6490-2017.

Key technical specifications of the PС120Б 212W insulator:

• Designation according to GOST 27661: PС120Б 212W
• Rated mechanical failing load: 120 kN
• Rated mechanical residual strength of the insulator: 96 kN
• Nominal diameter of the insulating part: 255 mm
• Nominal height: 127 mm
• Nominal creepage distance: 330 mm
• Standard ball-and-socket coupling according to GOST 27396 (IEC 120-84): 16 mm
• Flashover voltage in insulating medium: 130 kV
• Power frequency withstand voltage (dry): 70 kV
• Power frequency withstand voltage (wet): 40 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: 3.9 kg