Estd. 1974
Standing on the pillars of transparent business dealings and on-time delivery, we are
the leading Company, engaged in manufacturing, supplying & exporting of premium
quality high tension & low tension porcelain & polymer insulators, hardware fittings
and overhead line protection switches...
TM
INDIA
MANUFACTURERS OF
PORCELAIN AND POLYMER INSULATORS,
HARDWARE FITTINGS FOR INSULATORS AND
PROTECTION SWITCHES
NARESH POTTERIES
An ISO 9001:2008 & 14001:2004 Certified Co.
Industrial Area, G. T. Road,
KHURJA - 203131 (U.P.) INDIA
Website : www.npinsulators.com
www.indiamart.com/naresh-potteries
Email : nareshpott@gmail.com / nareshpott@yahoo.co.in
Telefax : +91-5738-232498, 230698
Mobile : +91-9897011107, 9897011106
TM
INDIA
ISO 14001:2004 Certified
Incepted in 1974, we are one of the leading Company engaged in the
manufacturing and exporting of durable and long lasting Electrical Porcelain and
Polymer Insulators, Hardware Fittings for Insulators and Protection Switches made from
premium quality raw materials. We manufacture our Products in accordance to
International Quality Standards. Located in the heart of the Pottery Town of Khurja, we
are empowered with world-class infrastructure and have also established
ISO 9001:2008 & 14001:2004 Certified Hi-tech Production Unit. Grounded our roots on
pillars like Quality, Trust and Loyalty; at Naresh Potteries every aspect of our operation
stands on professionalism and progress. We always stress on improving production
methods of our products and are committed to deliver our products within the shortest
period of time withfine quality.
In addition to this, our Highly Technical Staff is trained regularly to achieve or
exceed standards set by the latest, proven quality control systems applicable to our
manufacturing lines. We are also one of the few successful names in this booming
industry, to conduct periodical market survey and regularly collect consumer feedback
time after time. Today we are one of the few trusted names when it comes to provide
skillfully engineered products that can further improve clients' business.
Objectives...
Empowered with diverse experience in this high growth industry, we are committed:
To offer premium quality products that can perform efficiently in toughest
conditions.
To maximize our market leadership through on-time delivery of products and
continuous improvement with team effort.
To improvise our technology through continual R&D activities.
TM
SPOOL OR SHACKLE INSULATORS
INDIA
Two sizes of L.T. shackle insulators are widely used in india for tension as well as tangent locations
depending upon conductor sizes. These are 90 X 75 mm and 115 X 100 mm having failing load of 11.5
kN and 16 kN respectively. These insulators are made of good commercial grade wet process
porcelain. Altough L.T. Insulators are not susceptible to electrical failure, nevertheless NP-INDIA
ensures effective quality control particularly for archiving required mechanical strength and avoiding
sharp bends or uneven surfaces.
L.T.PIN INSULATORS
The choice of low tension insulators are guided by the relative realiability of the secondary lines and
constructional practices adopted by the different electricity supply undertaking. L.T. pin insulators are
also used in tangent locations. These are provided with a top groove and threaded to take mild steel
pins. The Pin insulators are generally suitable for a minimum failing load of 3.5 kN.
GUY/EGG INSULATORS
NP-INDIA guy insulators provide high quality insulation for medium and low voltage circuits. Its rugged
design provides relative freedom from breakage due to impact or rough handling. Maximum strength is
obtained from porcelain of guy insulators by the interlocking of guy cables as the load places the porcelain
between the holes in compression Further, the porcelain grooves of these insulators are suitably designed
to minimise strans stress. Guy or stay or egg insulators give protection in the event of a broken live
conductor accidentally energising a guy wire or stay wire and remaining in contact with the live line which
does nor trip. in such cases, he bottom portion of the guy wire or stay wire would have no voltage due to
insulation of guy strain insulator which normally installed in the middle of the guy or stay wire. Three types
of guy strain insulators are generally used for rural lines in India. These are (i) A type for 240/415V with
minimum failing load of 44 kN, (ii) B type for the same 240/415V with min. failing load of 53 kN and (iii) C
type for 11 kV lines with min. failing load of 88 kN. Two C type guy strain Insulators are normally used in
series for 33 kV lines. Guy Insulators can also be effectively used for dead end on medium voltage lines
11 KV PIN INSULATORS
NP - INDIA pin insulators are made of high grade wet process and are normally brown
glazed. Available range of 11 kV pin insulators : 230 mm CD (small head), 230 mm CD (bell
mouth), 280 mm CD & 320 mm CD.
11 KV POST INSULATORS
NP-INDIA post insulators are made from high quality electrical grade porcelain which provides
excellent electrical and mechanical properties. All post insulators are assembeled by jig and fixture
to ensure accuracy of overall height, parallelity of end faces and correct alignment of fixing holes.
Available range : 230 mm CD, 270 mm CD, 280 mm CD, 320 mm CD & 330 mm CD.
22 KV PIN INSULATORS
NP-INDIA range of 22 kV pin insulators includes both one piece or multipiece
construction. Pin insulators with special head grooves to accomodate special conductor
fastenings can be supplied on request. Range available upto 900 mm CD
22 & 33 KV POST INSULATORS
NP-INDIA cap & pedestal type post insulators are designed mainly to support disconnecting
switches, busbars, conductors and equipment of substations. They are capable of being stressed in
tension, compression, flexion, torsion and combined stresses upto the specified limits. These
insulators are more ecnomical than other types of insulators used for similar applications. Cap &
Pedestal type post insulators are divided into two main groups, viz. nonstacking and stacking units.
For service voltage upto 33 kV single units are available. Multi-unit stacks are available for service
voltage upto 220 kV.
TM
DISC INSULATORS (Standard & Antifog Type)
INDIA
NP-INDIA disc insulators ensure maximum creepage path due to their distinctive geometrical
configuration. Smooth rounded contours of shell provide protection against chipping. Caps are
made of malleable cast irons and pins of forged steel. These are galvenised to provide better
protection against corrosion. Insulators having alternative electro-mechanical ratings, spacings or
leakage distances to suit enviromental conditions. The glaze applied is compressive in nature, adds
to mechanical strength and provides smooth surface for self cleaning under contamination.
Standard glaze colour is brown. Disc Insulators are the most widely used models for transmission
and distribution lines. In strings they can be used for any voltage depending on the number of units
mounted in series. Their design varies to suit different types of polluted zones and mechanical
strength as per customer’s requirement. Available range : 45 kN T&C/ B&S/ Dead End Type, 70 kN
B&S/ T&C, 90 kN B&S/ T&C, 120 kN B&S & 160 kN B&S Type both in Standard & Antifog Version
33 KV PIN INSULATORS
NP-INDIA pin insulators of one piece or multipiece construction are widely used in low
cost distribution lines. Multipiece construction makes these insulators less vulnerable to
damage as with one shell broken a multipiece insulator can normally withstand the line
voltage for a considerable time without difficulty. NP-INDIA manufacturers full range of
pin insulators for application in sub-transmission and distribution lines upto a system
voltage of 66/72 kV. These insulators are available with creepage path to meet various
requirement of pollution. The recommended system voltage foe a particular type is
adequate for satisfactory performance as NP-INDIA pin insulators are designed for
natural cleaning by wind and rain and operate successfully with no attention whatsoever
under normal deposit of atmospheric dirt. NP-INDIA insulators are tested and
guaranteed for cantilever strength and are provided with adequate margin of safety.
Available range upto 900 mm CD and can be made of higher CD as per requirement
APPARATUS/HOLLOW BUSHING
The design concept for hollow porcelains is dependent on the complete design of electrical
equipment such as SF6 circuit breakers, Air blast circuit breakers, minimum-oil circuit
breakers, instrument transformers, condenser bushings and lightning arresters. NP-INDIA
accordingly finalises its design of porcelain housings, upto the range of 66 kV, in consultation
with the manufacturers of equipments so as to meet the electrical and mechanical
requirements, fixing and sealing arrangements and dimensional needs of an electrical
equipment within the manufacturing possibilities of shape, size and dimensional tolerance of
large hollow porcelains commensurate with provisions of IS 5621-1980. NP-INDIA apparatus
porcelains are subjected to tests specified under IEC-233/IS 5621-1980. Special Mechanical
and Hydraulic tests are also carried out as many be prescribed by the equipment
manufacturers
TRANSFORMER BUSHING
The porcelain shells of NP-INDIA transformer bushings represent a combination of competent
design with skilled manufacturing process. Inherent porcelain shells strength and electrical
properties of NP-INDIA transformer bushings fulfil the requirement of all international standards.
The porcelain shells for cable box and transformer bushings are a part of NP-INDIA product range
for service voltage upto 66 kV with current requirements varying from 250 to 3150 amps
conforming to relevant specifications. Dimensions of porcelain parts of insulators and bushings are
based on voltages and ampere ratings of transformer.
PRESSED ELECTRICAL PORCELAIN
The range of NP-INDIA Pressed Electrical Porcelain consists Kit-kats/Cut-outs, Bus Bars,
HRC Fuse Bases upto 500 Amp. and Reel Insulators, Split/Guard Insulators, Connectors of
Different sizes, as required. These products are made of good commercial grade wet
process porcelain. Although L.T. insulators are not susceptible to electrical failure,
nevertheless NP-INDIA ensures effective quality control particularly for achieving
required mechanical strength and avoiding sharp bends or uneven surfaces.
TM
SILICONE COMPOSITE POLYMER HIGH VOLTAGE INSULATORS
INDIA
Electrical insulator is a very important component in the electric power systems such as sub-stations and distribution &
transmission lines. In the early days, insulators were made of ceramic and glass materials. But in 1963, polymeric insulators were
developed and its improvements in design and manufacturing in the recent years have made them attractive to utilities. It consists
of a fiberglass core rod covered by weather-sheds or skirts of polymer such as silicone rubber, equipped with metal end fittings. It
is also called composite insulators, which means made of at least two insulating parts a core and housing equipped with end
fittings. Polymeric insulators have many advantages over the ceramic and glass insulators such as good performance in
contaminated environment, light weight, easy handling, maintenance free, and considerably low cost etc. Because of these
properties it is gaining popularity worldwide and as of result we, at NARESH POTTERIES started manufacturing Composite Polymer
insulators too.
This write-up gives the salient features considered by NARESH POTTERIES (An ISO 9001: 2008 & 14001 : 2004 Certified
Company) in developing SILICONE COMPOSITE POLYMER INSULATORS. Two aspects are to be essentially considered in the
development, one is the material suiting to the requirements and the other is design aspect. The following few lines will briefly
describe the important aspects considered.
INSULATOR CONSTRUCTION
PRODUCTION DETAILS
Factors
Composite Insulators Features
Resistance to flash overs in Polluted atmosphere.
Resistance to puncture
Resistance to Cracking and Erosion in Polluted
atmosphere.
Contamination & Pollution
Hydrophobicity
Self Cleaning Property
High
Not Puncturable
High
Maintenance
Weight
Resistance to breakage and Vandalism
Artificial Pollution Test
Power Arc Test
Performance not affected
Unique Hydrophobicity character
Due to Hydrophobicity recovery
characteristic
No Maintenance is required
10% to 35% of Ceramic Insulator
Unbreakable
Not applicable
Not Mandatory
INJECTION MOLDING
Polymeric housing is a single piece, directly injection moulded over FRP rod using a new
generation machine with microprocessor based controls. The housing is securely bonded to the
FRP core throughout the length of the housing.
Specialized crimping equipment with microprocessor based control is used to provide uniform
and consistent product. Crimping is verified through an extensive QA tests.
Advantages of Composite Insulators :
Light weight
Ease of Installation
Long term surface hydrophobicity and insulating properties
Superior anti-tracking properties
Resistance to breakage and vandalism; practically unbreakable
Unique self cleaning property
Suitable for polluted environment and salty atmosphere etc.
High mechanical strength
Choice of end fittings
Using a special polymer compound
Compliance with IEC:61109
Long Life
Reduced maintenance cost
Power loss by leakage current across the insulator is minimized
Anglo Computer # 9634500829
CRIMPING
TM
OUR PRODUCTS
INDIA
Accurate, reliable and free from any defect, we provide the best quality Electrical Porcelain and Polymer Insulators,
Hardware Fittings and protection Switches at an economical price. Featured with nil moisture absorption property
in porcelain Insulators, high strength and high efficiency, our wide collection of electrical insulators & other
products be categorized as :
PORCELAIN INSULATOR
11 kV Pin Insulators 230, 265, 280, 320, 540 mm CD
11 kV Post Insulators 280 & 320 mm CD
22 kV Pin Insulators 430 & 560 mm CD
22 kV Post Insulators 430 & 450 mm CD
33 kV Pin Insulators 580, 630, 680, 840 & 900 mm CD
33 kV Post Insulators 580, 840 & 900 mm CD
66 kV, 132 kV & 220 kV Post Insulators Stags
11 kV & 33 kV Solid Core Insulators
45 kN, 70 kN, 90 kN, 120 kN & 160 kN Disc Insulators
45 kN, 70 kN, 90 kN, 120 kN & 160 kN Disc Insulators Antifog Type
Transformer Bushings upto 66 kV
Guy Or Strain Insulators
L.T. Pin Insulators
LT Shackle And Spool Insulator
Pressed Electrical Porcelains
Kit Kats / Fuse Units upto 500 Amps.
POLYMER INSULATOR
11 kV Composite Polymeric Pin Insulators 5 KN
11 kV Composite Polymeric Disc Insulators 45 KN T&C
11 kV Composite Polymeric Disc Insulators 45 KN B&S
11 kV Composite Polymeric Disc Insulators 70 KN T&C
11 kV Composite Polymeric Disc Insulators 70 KN B&S
11 kV Composite Polymeric Disc Insulators 90 KN T&C
11 kV Composite Polymeric Disc Insulators 90 KN B&S
11 kV Composite Polymeric Disc Insulators 120 KN B&S
11 kV Composite Polymeric Disc Insulators 120 KN T&C
11 kV Composite Polymeric Post Insulator
11 kV Composite Polymeric Solid Core Insulator
33 kV Composite Polymeric Post Insulator
33 kV Composite Polymeric Solid Core Insulator
33 kV Composite Polymeric Pin Insulators 10 KN
33 kV Composite Polymeric Disc Insulators 45 KN T&C
TM
HARDWARE FITTINGS
Disc Hardware Tension Fittings for T&C & B&S Type Single Bolt (All sizes)
Disc Hardware Tension Fittings for T&C & B&S Type 2U Bolt (All sizes)
Disc Hardware Tension Fittings for T&C & B&S Type 3U Bolt (All sizes)
Disc Hardware Tension Fittings for T&C & B&S Type 4U Bolt (All sizes)
Disc Hardware Tension Fittings for T&C & B&S Type 5U Bolt (All sizes)
Disc Hardware Suspencion Fittings (All sizes)
Suspension Clamps (Insulated/ Non Insulated)
Dead End Clamps (All sizes)
I Hooks (Insulated/ Non Insulated)
Hooks (Insulated/ Non Insulated)
P- Earthing Connectors
Spindle/GI Pin for LT Pin
Spindle/GI Pins for 11 KV Pin Insulators
Spindle/GI Pins for 22 KV Pin Insulators
Spindle/GI Pins for 33 KV Pin Insulators
L.T Stay Rod set
11 KV Stay Rod set
33 KV Stay Rod set
T- Clamp full range
PG Clamp full range
Hardware for LV & HV Bushings
D-Iron/U Clamps for Shackle Insulators
Strap Fitting for Shackle Insulators
PROTECTION SWITCHES (Fitted with Porcelain/Polymer Insulator)
1. DROPOUT FUSES (DO Fuse)
(A) 11 KV Dropout Fuse (150 Amp./200Amp.)
Bracket Type
Channel Type
Solid Core /American Type
(B) 22 KV Dropout Fuse (400 Amp./600 Amp.)
Channel Type
(C) 33 KV Dropout Fuse (600 Amp./800 Amp./ 1200 Amp.)
Channel Type
2. HORN GAP FUSES ( HG Fuse)
11 kV
22 kV
33 kV
3. GANG OPERATED SWITCHES (GO)
11 kV
22 kV
33 kV
4. AIR BREAK GANG OPERATED SWITCHES (ABGO)
11 kV
22 kV
33 kV
5. ISOLATORS
11 kV
22 kV
33 kV
INDIA
APPROVALS
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Ajmer Vidhyut Vitran Nigam Ltd.
Assam State Electricity Board.
Assam Power Distribution Company Ltd.
Assam Electricity Grid Corporation Limited
BSES Rajdhani Power Ltd.
BSES Yamuna Power Ltd.
Bihar State Power Holding Company.
Central Electricity Supply Utility of Orissa.
Chattishgarh State Power Distribution Company Ltd.
Central Railway, Pune
Dakshin Gujarat Vij. Co. Ltd.
Dakshin Haryana Bijli Vitran Nigam Ltd.
Dakshinanchal Vidhyut Vitran Nigam Ltd., Agra
Damodar Valley Corporation. Jharkhand
Eastern Power Distribution Company of A.P Limited
Government of Nagaland Department of Power, Nagaland
Haryana State Industrial And Infrastructure Development Corp. Ltd. (HSIIDC)
Himachal Pradesh State Electricity Board, Himachal
Hubli Electricity Supply Company Limited
Jaipur Vidhyut Vitran Nigam Ltd.
Jodhpur Vidhyut Vitran Nigam Ltd.
Madhayanchal Vidhyut Vitran Nigam Ltd., Lucknow
Madhya Gujarat Vij. Co. Ltd.
Maharastra State Electricity Distribution Co. Ltd. (MSEDCL)
Maharastra State Electricity Distribution Co. Ltd.- Infra
Meghalaya Energy Corporation Ltd.
M.P Madhya Kshetra Vidhyut Vitran Co. Ltd., Bhopal
M.P Poorv Kshetra Vidhyut Vitran Co. Ltd., Jabalpur.
N.T.P.C
Nepal Electricity Authority, Nepal
North Central Railway.
Paschim Gujarat Vij. Co. Ltd.
Pashchimanchal Vidyut Vitran Nigam Ltd., Meerut
Power & Electricity Department, Mizoram
Punjab State Power Corporation Ltd.
South Western Railway.
Tripura State Electricity Board.
Uttar Gujarat Vij. Co. Ltd.
Uttar Haryana Bijli Vitran Nigam Ltd.
Uttar Pradesh Power Transmission Corporation Limited.
Etc...................