They are intended for an insulation and mounting of the current-carrying parts in electrical devices, switchgears of power stations and substations. They are used for the packaging of: disconnect switches of indoor installation, circuit breakers, power cabinets, safety cutoffs, for tire insulation. The material of the insulating part is a ceramic electrotechnical material of a subgroup 110 GOST 20419-83. They meet the requirements of TU 16-528.105-77.
| Insulator name* | Designation of the drawing | GOST, TU | Voltage class, kV | The length of insulation distance is not less than, cm | N, mm | D outer, mm | Weight, kg | Rough drawing | |
| nom. | prev. deviation + -10% | ||||||||
| ИО-1-2,5-1 У3 | INYAZH.686111.005SB | TU U26.2-00214652-002:2010 | 1 | — | 60 | 70 | 0,53 | 0,053 |  |
| ИОов-1-7,5-1 У3 | INYAZH.686111.004SB | TU U 26.2-00214652-002: 2010 | 1 | — | 70 | 174 | 1,5 | 0,15 | |
| ИО-6-3,75 I У3 ИО-6-3,75 II У3 | INYAZH.686112.003SB | GOST 9984-85 | 6 | — | 100 | 77 | 1,0 | 0,1 | |
| ИО-10-3,75 I У3 ИО-10-3,75 II У3 | INYAZH.686113.007SB | GOST 9984-85 | 10 | — | 120 | 82 | 1,4 | 0,14 | |
| ИО-10-20,00 У3 | INYAZH.686113.005SB | GOST 9984-85 | 10 | — | 134 | 160 | 6,0 | 0,6 | |
| OFR-10-7,5-II UHL2 | INYUM.686113.011SB | GOST 9984-85 | 10 | 17,5 | 190 | 220 | 5,5 | 0,55 | |
| OFR-20-7,5-II UHL2 | INYAZH.686114.006SB | GOST 9984-85 | 20 | 40 | 257 | 220 | 8,3 | 0,83 | |
| OFR-35-4-II UHL2 | BFIR.686115.015SB | GOST 9984-85 | 35 | 60 | 356 | 220 | 14,6 | 1,46 | |
| I4-80 I UHL2 | ИМЖК.686113.018SB | GOST 9984-85 | 10 | — | 120 | 105 | 2,10 | 0,21 | |
| I4-60 IІ UHL2 | IMZHK.686112.015SB | GOST 9984-85 | 6 | — | 95 | 85 | 1,20 | 0,12 | |
| I4-60 III UHL2 | IMZHK.686112.015SB | GOST 9984-85 | 6 | — | 100 | 85 | 1,20 | 0,12 | |
| IOR-10-7,50 I UHL2 | INYAZH.686113.006SB | GOST 9984-85 | 10 | — | 124 | 115 | 2,90 | 0,29 | |
| IOR-10-7,50 III UHL2 | NIYUD.686113.014SB | GOST 9984-85 | 10 | 18 | 120 | 115 | 2,5 | 0,25 | |
| IOR-10-7,50 III-1 UHL2 | NIYUD.686113.010SB | GOST 9984-85 | 10 | — | 124 | 115 | 2,88 | 0,28 | |
| IOR-6-1,0 UHL2 | NIYUD.384SB | GOST 9984-85 | 6 | — | 70 | 78 | 0,65 | 0,06 | |
| IOR-6-3,75 UHL2 | INSHYU.686112.006SB | GOST 9984-85 | 6 | — | 100 | 84 | 1,10 | 0,11 | |
| IOR-10-3,75 UHL2 | ILYUT.686113.003SB | GOST 9984-85 | 10 | — | 120 | 96 | 1,60 | 0,16 | |
| IOR-20-7,50 У3 | INYAZH.686114.003SB | GOST 9984-85 | 20 | — | 160 | 160 | 6,30 | 0,63 | |
| IOR-24-6 UHL2 | ILYAN.686115.025SB | GOST 9984-85 | 24 | 48 | 307 | 220 | 9,7 | 0,97 | |
| IORF-20-8,0 І UHL2 | NIYUD.686143.022SB | GOST 9984-85 | 20 | 40 | 232 | 198 | 7,1 | 0,71 | |
| IORF-20-8,0 ІІ UHL2 | NIYUD.686143.022-01SB | GOST 9984-85 | 20 | 50 | 272 | 198 | 8,1 | 0,81 | |
| IORF-24-8,0 UHL2 | NIYUD.686143.022-02SB | GOST 9984-85 | 24 | 62 | 302 | 198 | 9,3 | 0,93 | |
The following letters and figures in the conventional value of IOR and OFR insulator types denote:
I – insulator;
O – supporting;
R – ribbed;
F – porcelain;
1; 6; 10; 20; 24; 35 – nominal voltage, kV;
1; 2.5; 3.75; 4; 6; 7.5; 20 – minimum breaking force while bending (breaking), kN;
60; 80 – impulse test voltage, kV;
I; II; III; IV – hardware versions;
UHL – climatic version according to GOST 15150-69;
2 (under the covers); 3 (indoors) – placement (operation) category according to GOST 15150-69.
The following letters and figures in the conventional value of IO and IOov insulator types denote:
I – insulator;
O – supporting;
ov – oval shaped base stand;
1 – nominal voltage, kV;
2,5; 7,5 – minimum breaking force while bending (breaking), kN;
1 – modification;
U – climatic version according to GOST 15150-69;
3 (indoors) – placement (operation) category according to GOST 15150-69.
The following letters and figures in the conventional value of I4 and I8 insulator types denote:
I – insulator;
4; 8 – minimum breaking force while bending (breaking), kN;
60; 80; 125 – test voltage of lightning impulse;
UHL – climatic version according to GOST 15150-69;
2 – placement category according to GOST 15150-69.