Line pin porcelain insulators are designed for an insulation and mounting of the wires on overhead transmission lines and in switchgears of power stations and substations. They meet the requirements of DSTU 2202-93 (GOST 1232-93). The material of the insulation part is a ceramic electrotechnical material of a subgroup 110 GOST 20419-83.
| Insulator name | Designation of the drawing | ТU | Voltage class, kV | Breaking force while bending (min), kN | Breakdown voltage, kV | N, mm | D outer, mm | Weight, kg | Rough drawing | |
| nom. | prev. deviation + -10% | |||||||||
| ШФ 20-1Г | НИЮД. 757526.010 |
ТU U 26.2-00214652 -003:2010 |
20 | 13 | 160 | 185 | 175 | 3,50 | 0,35 |  |
The following letters and figures in the conventional value of insulator type denote:
Sh – pin;
F – porcelain;
20 – nominal voltage, kV;
1G – modification.