To Stay Ahead of the Curve, Keeping Adherence to Traditions

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The MAIN JOURNAL for POWER GRID SPECIALISTS in RUSSIA

3 - 6   J U N E   2 0 1 9

MADRID, SPAIN

The MAIN JOURNAL for POWER GRID SPECIALISTS in RUSSIA

3 - 6   J U N E   2 0 1 9

MADRID, SPAIN


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34

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equipment

To Stay Ahead of 
the Curve, Keeping 
Adherence to Traditions

For more than 120 years of its history, Izolyator plant has 
produced more than 620,000 high-voltage bushings, operating 
in the vast majority of power facilities in Russia and the CIS 
countries, as well as in 30 countries of the world. Due to 
active research and development activities, continuous 
expansion of international relations both in business and in 
engineering direction, the company is constantly improving 
its products, offering perfect innovative solutions, which 
provide the highest level of reliability.

INNOVATIVE 

DEVELOPMENTS

The  range  of  products  manufac-

tured by the company includes over 

360  high-voltage  bushings  (includ-

ing  its  versions)  of  various  types 

and voltage classes. In total, about 

32 new bushing designs were devel-

oped  within  the  past  2018.  Among 

them there were innovative products 

not previously produced in Russia.

Since 2018, Russian power grids 

have set a course for the transfer of 

all  major  technological  processes 

to  a  new  digital  platform.  Support-

ing  the  implementation  of  power 

grid digitalization concept, Izolyator 

started  the  development  of  a  new 

bushings  line  containing  additional 

power sources for connecting digital 

diagnostic equipment. Such an op-

tion will undoubtedly be in demand 

in  the  nearest  future  when  retrofi t-

ting  power  transformers  and  old 

circuit breakers without inbuilt diag-

nostic tools.

Design and construction of new 

modern digital substations required 

new  types  of  high-voltage  equip-

ment,  which  includes  high-voltage 

bushings. The best option for solving 

the tasks of digital substations was 

to implement a new type of bushings 

with solid insulation like RIN (Resin 

Impregnated Nonwoven).

RIN is a resin-impregnated non-

woven  synthetic  material.  This  in-

novative  in  all  senses  component 

allows  engineers  to  create  new-

generation  high-voltage  bushings. 

Eliminating  paper  from  solid  bush-

ing insulation signifi cantly increases 

its moisture resistance. In addition, 

requirements  for  bushings  storage 

are considerably reduced.

  The  technology  of  RIN-insula-

tion manufacturing is almost identi-

cal to the RIP-technology. However, 

RIN-insulation  properties  make  it 

possible  to  eliminate  long  and  en-

ergy-intensive  operation  of  thermal 

vacuum  drying.  Besides,  the  im-

pregnation process leaves no voids 

in the insulation material due to the 

chemical  reaction  of  synthetic  yarn 

and epoxy resin. It ensures the ab-

sence  of  partial  discharges  inside 

the  insulation  up  to  the  maximum 

operating voltage.

The  resulting  insulation  material 

has the highest hydrophobic proper-

ties. Due to this, dielectric loss coeffi  -

cient is stable and independent from 

the  eff ects  of  very  high  humidity.  It 

ensures transportability, absence of 

special  storage  requirements,  and 

reliable operation of the insulation.

Digital substations are designed 

to ensure minimal equipment main-

tenance  in  operation.  If  something 

happens,  it  is  necessary  to  re-

place failed equipment as easily as 

a blown fuse. Bushings with internal 

RIN insulation and external polymer 

insulation  serve  these  purposes. 

When  damaging  such  a  bushing, 

there are no damages for adjacent 

equipment and bushings of adjacent 

electrical phases. In this case, it is 

enough  to  replace  the  bushing  for 


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further electric power supply of con-

sumers.

Bushings with RIN insulation are 

certifi ed in GOST RF state certifi ca-

tion  system.  The  certifi cates  of  the 

Federal Agency on Technical Regu-

lating  and  Metrology  are  obtained. 

At  present,  the  certifi cation  proce-

dure in PJSC "Rosseti" is at the fi nal 

stage.

It should also be noted that RIN 

insulation has high thermal conduc-

tivity and a low coeffi  cient of thermal 

expansion. It helps to decrease volt-

age between mechanically connect-

ed elements of the bushing. This is 

important  for  operation  at  extreme 

temperatures  (both  high  and  low). 

Also,  such  properties  of  RIN  insu-

lation  open  up  the  possibilities  for 

creating equipment using supercon-

ductivity phenomenon.

In such equipment, the bushings 

must  operate  reliably  at  ultra-low 

temperatures. At the same time, the 

lower  part  of  the  bushings  should 

constantly work in liquid nitrogen at 

the  temperature  of  minus  196  °С, 

and  the  upper  part  —  at  ambient 

temperature.

Conducted  studies  have  shown 

that  RIN-insulation,  using  synthetic 

nonwoven material, makes it possi-

ble to produce bushings enabled to 

withstand all the specifi ed electrical 

and  mechanical  loads  in  extreme 

working  conditions  (under  extreme 

temperatures). As a result, Izolyator 

plant  developed  and  manufactured 

110  and  220  kV  bushings,  which 

passed all acceptance tests. Today, 

Izolyator plant is the only manufac-

turer  of  high-voltage  bushings  in 

the world that has successfully con-

Bushings with RIN insulation in the assembly room of Izolyator plant

New equipment for manufacturing external polymer insulation 
of bushings at Izolyator plant

The 

 rst phase of 220 kV superconducting current limiter, 

equipped with bushings produced by Izolyator plant in the 
KER test center

ducted acceptance tests of 110 and 

220  kV  bushings,  the  lower  parts 

of  which  were  in  liquid  nitrogen  at 

a temperature of minus 196 °С.

Such  high-voltage  bushings 

produced  by  Izolyator  plant  proved 

their  high  reliability  and  quality  in 

the project of SuperOX company for 

creating  220  kV  three-phase  cur-

rent-limiting  device  based  on  high 

temperature super conductivity. The 

equipment was installed at Moscow 

"Mnevniki"  substation  in  2018.  Fol-

lowing the results of the work done, 

the company plans to initiate a stan-

dard for the use of cryogenic equip-

ment in power industry.

Foreign  orders  pose  new  chal-

lenges  to  the  company,  related  to 

the  change  of  product  design,  the 

search  for  technical  solutions  and 

non-standard  approaches  when 

manufacturing  process.  Many  new 

engineering  solutions  of  Izolyator 

plant appear due to foreign orders.

In response to world technologi-

cal  challenges  and  requests  from 

foreign  customers,  Izolyator  plant 

developed and launched into serial 

production a line of DC bushings for 

long-distance transmission lines. To 

the  date,  complete  documentation 

has  been  prepared  for  the  produc-

tion  of  high-voltage  DC  bushings. 

In  addition,  plant’s  test  center  has 

been  equipped  with  the  necessary 

equipment.  Thus,  high-quality  do-

mestic  bushings  for  future  Russian 

The 25th CIRED Session 
Special issue, June 2019


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long-distance DC transmission lines 

already exist.

INTEGRATION 

COOPERATION

In the past and present, and well into 

the future international cooperation 

is an important part of Izolyator Com-

pany operation and development. At 

the same time, the company espe-

cially appreciates the opportunity to 

prove  the  reliability  and  effi  ciency 

of  developed  technologies,  materi-

als  and  equipment  through  one  of 

the most diffi  cult challenges — the 

test  of  time.  Due  to  this,  Izolyator 

Company constantly opens up new 

regions of presence worldwide, es-

tablishing  long-term  and  eff ective 

partnership.

In 2018, the company signifi cant-

ly  strengthened  its  relations  with 

long-standing  and  reliable  partners 

from the CIS countries — power grid 

companies  and  energy  equipment 

manufacturers  from  Armenia,  Mol-

dova, Tajikistan, Kazakhstan, Bela-

rus, Ukraine, Uzbekistan and Geor-

gia.  Izolyator  Company  has  found 

reliable  partners  in  European  and 

Asian countries and has contributed 

to the strengthening of relations be-

The agreement on joint manufacturing facility establishment between Mehru and 
Izolyator was signed during the 47th CIGRE Session in Paris. From left to right: 
Andrey Murov, Chairman of the Management Board of "FGC UES", PJSC; I. S. Jha, 
Chairman of Power Grid; Sandeep Prakash Sharma, Executive Director of Mehru; 
Alexander Slavinsky, Chief Executive O

  cer of Izolyator Plant LLC

Participants of bushing tests for Indian companies TSTRANSCO and TTDI in the test center of Izolyator Plant

tween the national energy systems 

of Russia, Vietnam and India.

An  important  milestone  in  the 

development  of  the  international 

relations of Izolyator Company and 

entire  domestic  electrical  indus-

try  was  the  signing  of  a  strategic 

memorandum with the Indian com-

pany Mehru Electrical & Mechanical 

Engineers (P) Ltd on the establish-

ment of a joint manufacturing facility

within the 47th CIGRE Session.


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Izolyator Company 

Leninа str. 77, Pavlovskaya Sloboda,

Istrinskiy District, Moscow Region,

143581 Russian Federation

Tel  + 7 (495) 727 3311

Fax  + 7 (495) 727 2766 

mosizolyator@mosizolyator.ru 

www.mosizolyator.com

The  signing  ceremony  of  the 

Agreement  was  held  at  the  booth 

of  Russian  National  Committee  of 

CIGRE  (RNC  CIGRE)  in  the  pres-

ence  of  Andrey  Murov,  Chairman 

of the Management Board of "FGC 

UES", PJSC and Chairman of RNC 

CIGRE, and Mr. Jha, Chairman and 

Managing  Director  of  Power  Grid 

Corporation  of  India  Limited  and 

Chairman of CIGRE Indian NC.

The  agreement  establishes  the 

principles  of  organizing  the  com-

plete  production  cycle  and  further 

realization  of  high-voltage  bush-

ings of various voltage classes with 

modern solid RIP insulation in India. 

The main constructive part, as well 

as the know-how of the joint manu-

facturing  facility  will  be  the  internal 

RIP-isolation  —  Izolyator  company 

in-house development. It should be 

noted that this is the fi rst experience 

of  Russian  companies  in  creating 

a joint manufacturing facility for the 

production  of  high-voltage  electric 

power  equipment  with  Indian  com-

panies.

Mutually  benefi cial  cooperation 

of Izolyator and Mehru will allow the 

companies to reduce production and 

transport  costs  and  to  optimize  the 

logistics of ultimate product delivery 

to the customer. Much attention will 

be paid to the maintenance of pro-

ducts both in the processes of its in-

stallation and operation through the 

use of developed service and distri-

bution network of the Indian partner.

Izolyator Company plans to con-

duct  a  full  range  of  high-voltage 

bushings tests at the Central Power 

Research  Institute  in  India  in  April 

2019.

The  type  test  program  includes 

a full cycle of electrical, current and 

special  seismic  tests  of  420  kV  / 

3000 A and 800 kV / 2000 A bush-

ings.  The  most  interesting  and  un-

paralleled  anywhere  in  the  world 

stage  of  future  international  event 

will  be  seismic  resistance  test  of 

800 kV / 2000 A bushing.

The main part of the event will in-

clude an open technical conference 

for discussing all aspects and tech-

nical features of operation, installa-

tion  and  maintenance  of  ultrahigh-

voltage bushings with RIP-insulation 

made by Izolyator Company for In-

dian power facilities.

Due to the expansion of interna-

tional  cooperation  areas,  Izolyator 

Company  has  the  opportunity  to 

manufacture products that are com-

petitive not only in the Indian market, 

but also in the markets of Southeast 

Asia,  including  China,  and  in  other 

regions  of  the  world.  In  the  near-

est  future,  the  company  will  have 

good prospects in the Middle East. 

The  fi rst  steps  of  cooperation  with 

Turkey have already been taken. In 

addition,  cooperation  with  Syria  is 

starting and collaborative work with 

such  a  long-time  partner  as  Iran 

Transfo company is continuing.

Alexander  Slavinsky,  D.  Sc., 

Chief  Executive  Offi  cer  of  Izoly-

ator Plant LLC emphasizes that the 

company’s  staff   is  always  ready  to 

share  unique  accumulated  experi-

ence  with  all  partners.  Sharing  of 

experience is an integral part of the 

mission  to  create  the  foundations 

for a stable and sustainable energy 

supply in the world.

Today,  the  company  sets  new 

global  challenges.  For  Izolyator 

plant it has already become a good 

tradition  to  please  consumers  with 

new  materials  and  technologies

every  year.  In  2019  the  export  vol-

ume  will  be  further  increased,  and 

"Made  in  Russia"  brand  will  be 

brought to a new global level.  

Р

The 25th CIRED Session 
Special issue, June 2019


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For more than 120 years of its history, Izolyator plant has produced more than 620,000 high-voltage bushings, operating in the vast majority of power facilities in Russia and the CIS countries, as well as in 30 countries of the world. Due to active research and development activities, continuous expansion of international relations both in business and in engineering direction, the company is constantly improving its products, offering perfect innovative solutions, which provide the highest level of reliability.

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