Ceramic unreinforced covering. The covering is designed for coupling capacitors, power robbing and voltage divisor operating outdoors on the overhead transmission lines of high-voltage DC current and AC current that provide operational integrity of the high-voltage electric transmission lines, stability of power systems. The covering is intended for current transformers for a voltage from 35 to 1150 kV. The covering operates within outdoor conditions, is used as an external insulation and protect the internal parts of transformers from weather and mechanical effects. It meets the requirements of GOST 5862-79. The material of the insulation part is a ceramic electrotechnical material of a subgroup 110 GOST 20419-83.
| Covering name | Designation of the drawing | GOST, TU | Voltage class, kV | The length of the insulation distance is not less than, cm | N, mm | D outer, mm | Weight, kg | Rough drawing | |
| nom. | prev. deviation ±10% | ||||||||
| П 400/265 О (глинозем) | НИЮД.925 | GOST 5862-79 | — | 46 | 400 | 472 | 58,0 | 5,8 |  |
| П 400/470 О | ИМЖК.757523.003-05 | GOST 5862-79 | — | 46 | 400 | 700 | 78,0 | 7,8 | |
| П 550/100 О | ИМЖК.757523.174-02 | GOST 5862-79 | — | 105 | 550 | 290 | 30,0 | 3,0 | |
| П 550/210 О1 | НИЮД.559 | GOST 5862-79 | 35 | 105 | 550 | 400 | 48,0 | 4,8 | |
| П 645/340 О | ИНШЮ.757524.024 | GOST 5862-79 | 35 | 65 | 645 | 500 | 71,0 | 7,1 | |
| П 670/420 У | ИНШЮ. 757524.022 | GOST 5862-79 | 35 | 70 | 670 | 614 | 91,0 | 9,1 | |
| П 840/450-1 | НИЮД.757523.127 | GOST 5862-79 | 35 | 105 | 840 | 644 | 154,5 | 15,4 | |
| П 850/170 О | ИМЖК.757523.003-11 | GOST 5862-79 | — | 145 | 850 | 334 | 65,0 | 6,5 | |
| П 870/420 О | ИТЖШ.757524.029 | GOST 5862-79 | 35 | 108 | 870 | 624 | 119,0 | 11,9 | |
| П 1130/170 УХЛ1 | НИЮД.757523.056 | GOST 5862-79 | 110 | 284 | 1130 | 364 | 101,0 | 10,1 | |
| П 1185/430 О | ИНЯЖ.757524.054 | GOST 5862-79 | 110 | 285 | 1185 | 610 | 178,0 | 17,8 | |
| П 1240/450 УХЛ1 | НИЮД.757523.055 | GOST 5862-79 | 110 | 284 | 1240 | 636 | 209,0 | 20,9 | |
| П 1280/420 О | НИЮД.862 | GOST 5862-79 | 110 | 280 | 1280 | 630 | 214,0 | 21,4 | |
| П 1300/170 УХЛ1 | НИЮД.757523.138 | GOST 5862-79 | 110 | 390 | 1300 | 374 | 114,0 | 11,4 | |
| П 1320/470 О | ИМЖК.757523.003-14 | GOST 5862-79 | — | 350 | 1320 | 700 | 325,0 | 32,5 | |
| П1330/420 О
П1330/420-II О |
ИНЯЖ.757525.009
– 02 |
GOST 5862-79 | 110 | 280 | 1330 | 630 | 216,0 | 21,6 | |
| П 1340/150 О | ИМЖК.757523.175 | GOST 5862-79 | — | 260 | 1340 | 340 | 95,0 | 9,5 | |
| П 1340/170 О | ИМЖК.757523.003 | GOST 5862-79 | — | 300 | 1340 | 350 | 130,0 | 13,0 | |
| П 1385/300 У | ИНЯЖ.757524.007-03 | GOST 5862-79 | 110 | 280 | 1385 | 520 | 245,0 | 24,5 | |
| П 1400/265 О (глинозем) | НИЮД.873 | GOST 5862-79 | — | 350 | 1400 | 455 | 191,0 | 19,1 | |
| П 1405/470 УХЛ,Т | 2ИП.812.031 | GOST 5862-79 | 110 | 280 | 1405 | 690 | 390,0 | 39,0 | |
| П 1440/450 УХЛ1 | НИЮД.757523.054 | GOST 5862-79 | 166 | 370 | 1440 | 646 | 250,0 | 25,0 | |
| П 1515/470 О | ИМЖК.757523.003-15 | GOST 5862-79 | — | 414 | 1515 | 700 | 335,0 | 33,5 | |
| П 1535/450 О | ИНЯЖ.757524.007 | GOST 5862-79 | 110 | 290 | 1535 | 660 | 261,0 | 26,1 | |
| П 1620/450 О | ИНЯЖ.757525.007 | GOST 5862-79 | 110 | 400 | 1620 | 630 | 268,0 | 26,8 | |
| П 1645/590-2 О | НИЮД.757524.010 | GOST 5862-79 | 150 | 390 | 1645 | 790 | 363,0 | 36,3 | |
| П 1700/470 О | ИМЖК.757523.003-16 | GOST 5862-79 | — | 459 | 1700 | 700 | 360,0 | 36,0 | |
| П 1745/300 У | ИНЯЖ.757524.020 | GOST 5862-79 | 150 | 390 | 1745 | 520 | 312,0 | 31,2 | |
| П 2000/280 УХЛ1 | НИЮД.757523.052 | GOST 5862-79 | 220 | 568 | 2000 | 480 | 255,0 | 25,5 | |
| П 2280/700 О | ИНЯЖ.757524.018 | GOST 5862-79 | 220 | 591 | 2280 | 930 | 780,0 | 78,0 | |
| П 2650/580 У | ИБДП.757524.004 | GOST 5862-79 | 330 | 540 | 2650 | 812 | 706,0 | 70,6 | |
| П 2670/470-2 | НИЮД.757524.012 | GOST 5862-79 | 750 | 621 | 2670 | 670 | 594,0 | 59,4 | |
| П 2670/590-2 | НИЮД.757524.011 | GOST 5862-79 | 750 | 621 | 2670 | 810 | 717,0 | 71,7 | |
| П 2700/700 У | ИНЯЖ.757524.009 | GOST 5862-79 | 1150 | 620 | 2700 | 940 | 1215,0 | 121,5 | |
| П 2875/470 У,Т | ИНЯЖ.757523.064 | GOST 5862-79 | 330 | 817 | 2875 | 700 | 1346,0 | 134,6 | |
| П 4100/570-1 У,Т | НИЮД.187 | GOST 5862-79 | 500 | 1180 | 4100 | 770 | 1100,0 | 110,0 | |
| ПКДА 1840/100 О | ИМЖК.686174.033СБ | ТУ 16-88 ИМЖК. 686174.023 ТУ | — | 450 | 1840 | 245 | 90,0 | 9,0 | |
Interpretation of the conventional value of a covering type:
P – covering;
Numerator of the fraction is the height of a covering, mm;
Denominator of the fraction is the maximum inner diameter of a covering, mm;
1; 2 – modification;
O; U; UHL; T – climatic version;
1 – placement category.
Interpretation of the conventional value of the covering of PKDA type:
P – covering;
K – condenser;
D – voltage divisor;
A – reinforced;
Numerator of the fraction is the height of a covering, mm;
Denominator of the fraction is the maximum inner diameter of a covering, mm;
O – climatic version;
The material of insulation part is a ceramic electrotechnical material of a subgroup 110 GOST 20419-83