National Resistors Midc, Pune, Maharashtra

Clients can avail from us a wide range of Wire Grid Resistance that is widely used for earthing applications. It is precisely designed and manufactured with the aid of cutting edge technology from quality approved raw material. Provided product is employed in alternative current distribution networks and limit the restricted earth current to a safe value that flow from the transformer star point without surpassing specified temperature. The offered product is quality tested before delivery to ascertain their durability at clients end. In tune with the variegated requirements of our clients we provide this Wire Grid Resistance in various specifications. Features: Resistance wire is would on ceramic insulator to form a coil for wire wound. Tapping can be taken at any place. These Resistors are economical for low current. Available in ratings of 1 Amp and above. Specifications: Dissipation is negligible & the temperature rise for the resistor element depends on its capacity to store the energy generated in proportion to the mass & specific heat of the material used. Theses NGRS are connected between the neutral point of transformer / generator & the earth. In Earth fault condition continuous current of 5 % to 10 % of full load current pass through the resistor due to unbalance in systems. In Earth fault condition the Restricted earth fault current passes through the Metallic Resistor protecting the system till automatic protection takes place by absorbing the earth pressure, protecting the winding etc. Hence these resistors are designed for allowing maximum heat dissipation Internal Features Of Resistor Enclosure Group of Resistance elements are mounted together to form a Bank. Banks are then connected in series or parallel to provide the current and ohmic value required. All Resistance Bank to Bank interconnections will be done by solid stainless steel / copper. In case of continuous current ratings for better heat dissipation, perforated sheet / jali with welded GI wire mesh is provided at the bottom. Foundation channels have welded or bolted to the angle iron structure on two sides with arrangement to fix on foundation by bolts at site. Terminals are brought through Porcelain bushings of appropriate voltage class or brought down as per requirement of customer. In case of higher voltage, the banks are placed on stand off insulators housed inside the enclosures, or the enclosures is also insulated from ground by using stand off insulator if asked by customer TESTS (A) Routine Tests: - Following Tests Will Be Conducted. Visual and Dimensional. Insulation resistance value measurement by using 500V / 1000V megger before and after dielectric test. Resistance value measurement with Ã?â??Ã?± 10 % tolerance. H.V. Test of twice the rated voltage +1000 volts for voltage class below 660 volts or 2.25 times of rated voltage +2000 volts for voltages above 1100 volts. (B) TYPE TESTS :- Temperature rise test i.e., Heat run test if required will be conducted by passing equivalent / rated current for rated / equivalent time keeping IT Constant through a part of Resistor.   Technical Information: Line to neutral voltage rate Normally Full load current rate is same System Voltage is divided by root3 i.e. 1.732. Initial current flow through resistors when it is cold Time length rate for NGR must tolerate rated voltage. NGR construction includes resistor assembly, internal connections, plus required insulators, etc Generally temperature rise rating is restricted to 375 deg.c. above ambient temperature as per BS-587. It can be 760 deg.c. as per IEEE-32 Normally 10 % of full load current is require for continuous functioning rate of neutral grounding resistor of 5 % to 10 % of full load current Such resistor elements material are made from any stainless steel or FeCrAl or Cu-Ni or Ni-Cr or any other resistance material. Normally formed stainless steel element are best   Information To Be Furnished To Us: Material of Resistor Ohmic Value Current Rating Duty rating 10 sec.,30 sec.,60 sec., & continuous etc. If details against and cannot be given then inform details of transformer such as KVA rating, full load current, Primary & Secondary Voltage. System voltage / operating voltage. Type of Enclosure and material for enclosure ( protection class as per IS- 12063) Location: Indoor or outdoor. Temperature rise allowed over an ambient temperature. Whether space heater, current transformer , isolating switch on load / off load, manually / motorised, or any other accessories are required. Details of atmospheric conditions at site and height above sea level

Feature : Optimum performance,High efficiency,Reliable

Usage : Electrical industry

Owing to our expertise, we bring forth and exclusive range of Resistive Load Banks. Designed and manufactured by our adroit professionals using high quality raw material and progressive technology in accordance with the requirements of the clients. Provided load banks are available in varied specifications as per the application requirement of the clients and are mainly used to develop electrical load. Offered load banks are controlled with the help of control devices for any heavy application. Furthermore, our clients can avail these Resistive Load Banks from us at affordable prices. Features: Easy installation Optimum performance Robust construction Long service life

The company produces reliable neutral isolator panels in Chikhli, Maharashtra, India; for the worldwide market. Adept professionals in high tech production units fabricate these panels, which are used for the protection of electric motor against hazards of overloads. Apart from routine tests, these panels undergo vibration, rain and hygroscopic tests. The neutral isolator panel housed in a cubicle adjacent to NGR cubicle, comprises an isolating switch and CTs, as required. It uses fibre glass link, which is mechanically strong and prevents regular problem of breakage at site. This isolator panel can be custom built and provided with several interlocks. Features of reliable neutral isolator panel: Easy to mount on walls, structures or in switchboards Durable finish and shock proof High operating reliability Trouble free performance Requires less maintenance Suitable for indoor / outdoor applications Specifications: 3.3 / 6.6 / 12 / 22 / 33 KV. 400 /630 /1200 /1800 /3200 Amp. Single pole or three pole On or Off load Manual or motorized mode of operation

We are manufacturing, exporting and supplying an extensive range of Punched Stainless Steel Grids. These grids are manufactured under the stern vigilance of our dexterous professionals using outstanding grade stainless steel with the aid of modish techniques at our well-maintained production unit. The offered grids are tested on various parameters to assure their performance. Besides, we provide these Punched Stainless Steel Grids to our valued patrons at the most negotiable rates. Features: Temperature resistance Ruggedness Anti-corrosive body Accurate dimension Other information: Grids are punched out of AISI 304/AISI 430 type stainless steel sheets or AISI-406 i.e. FeCrAl Sheets. Temperature coefficient of resistance is 0.094% per degree C for stainless steel AISI-304 & 0.15% per oC for AISI - 430 & 0.019% per oC for FeCrAl i.e. AISI-406. Connection between the adjacent grids can be following type: Adjacent grids will be connected by using galvanized Nut-Bolts using spring washers. With Tig welded joints, which are totally secured against intense vibration. Terminals can be brought down at the bottom for ease of connection if asked. Each grid element is supported on Tie rods. Hence the assembly of resistance unit becomes very sturdy and it can absorb intense vibrations. Grids are insulated from M.S.tie rod by using Mica tube. Galvanised/Aluminium pipe/MS Washers will be provided as spacer between grid elements and the same will be insulated from grids by using Mica washers. These grids have wide range of current rating varying from 10 Amps to 200 Amps.

With that aid of technologically updated infrastructure and a team of diligent professionals, we are involved in manufacturing, supplying and exporting Punched Grid Type NGR. These resistors are applauded by our clients world wide for their easy installation, dimensional accuracy, safe usage, excellent protection and durability. The qualitative Punched Grid Type NGR is one of the most reliable sources for saving the whole electronic system from failure and collapse. Our expert team of manufactures a spectrum of precision engineered products of Punched Grid Type NGR. We offer a gamut of designed products with high performance, latest technology, reliable and durability. Along with superior products quality, the company is preferred for its efficient post-sales services. The service engineers provide required services within committed time period for the products. Features: Grids are punched out of AISI 304 / AISI 430 type stainless steel sheets or AISI - 406 i.e. FeCrAl Sheets. Temperature coefficient resistance is 0.094% per degree C for stainless steel AISI -304 & 0.15% per C for FeCrAI i.e. AISI -406 Connection between the adjacent grids can be of following type :- (A)Adjacent grids will be connected by using galvanized Nut-Bolts using spring washers. (B) With Tig welded joints, which are totally secured against intense vibration. Terminals can be brought down at the bottom for ease of connection if asked. Each grid element is supported on Tie rods. Hence the assembly of resistance unit becomes very sturdy and it can absorb intense vibrations. Grids are insulated from M.S. tie rod by using Mica tube. Galvanised / Aluminium pipe / MS Washers will be provided as spacer between grid elements and the same will be insulated from grids by using Mica washers. These grids have wide range of current rating varying from 10 Amps to 200 Amps. of breakage of epoxy link at site.

Phase side Cubicles offered are made as per the application it is put to. These cubicles feature effective functioning and require very low maintenance. The design of phase side cubicles depends on voltage level of the generator and the type of bus duct system between generator and step up transformer of the power plant. The phase side cubicles undergo functional testing of the complete assembled panel; continuity test and test on wiring; and the HV test, to ascertain their compliance to performance & safety standards.

Type : Cubicles

Material : Metal

Use : Office , Home etc.

Finishing : Polished

Warranty : 1 Year

Shape : Rectangular

NIS panels are used alongside neutral isolators. The manufacturing and supplying company also designs 33 KV NIS panels with voltage ratings upto 33KV. The cubicle of the NIS made of steel has an isolated switch, CTs, gland plate, etc. Such panels that are developed in-house undergo several tests, like vibration, rain, hygroscopic, etc., and those that pass through such tests and manual inspections are considered ready to deliver products. The ISO 9001:2008 certified company also keeps a stock of such panels to meet the urgent requirements of clients. The options available with these panels are single pole or three pole, vertical or horizontal type, on load or off load, motorised or manual mode of operation, mount options, etc. Send us inquiries if you want a 33 KV NIS panel in the electrical industry.

Our capacious warehouse is installed with all required amenities essential for safe storage of the products. Furthermore, our warehousing system is efficiently managed by our team of experts. We have achieved great heights of success by providing top-notch array of Neutral Side Cubicles. The offered Neutral Side Cubicles is made of stainless steel and available in size 1400x1450x1500mm.

Type : Cubicles

Material : Metal

Use : Office , Home etc.

Finishing : Polished

Warranty : 1 Year

Shape : Rectangular

Owing to our years of industry experience, we have carved out an outstanding position as the foremost manufacturer and supplier of a wide range of Neutral Isolator Panels (NIS). These panels are perfect for power and to prevent the electric motor from the hazards of overloads. We manufacture this panel using supreme grade raw material and ultra-modern techniques in sync with the international standards of quality and design. Owing to their perfect finish and robust construction, these Neutral Isolator Panels (NIS) are widely demanded in the electrical industry. Features: Durable finish standards Shock resistant properties Easy installation Trouble free performance Neutral Isolator Panels HT indoor isolators of following rating 3.3 KV / 6.6 KV/ 12 KV / 22 KV / 33 KV. 400 Amp./630 Amp./1200 Amp./1800 Amp./3200 Amp. Features: Type tested at M/S. ERDA, VADODARASingle pole / Three poleOn load / Off loadMotorised / Manual mode of operationAvailability of link drive / Aux. switch for switchboard operation / electrical indications and interlock purpose respectivelyCan be mounted on walls, structures or in switchboards / panelsHigh operating reliabilitySimple maintenance and inspectionUsed mechanically strong fiberglass link instead of epoxy link to avoid regular problem of breakage of epoxy link at site.Custom built isolator panels with various interlocks are also manufactured suitable for indoor / outdoor Applications 33 KV ISOLATORS National Resistors offers 33 KV isolators with voltage ratings upto 33 Kv and these resistors are widely used isolating high-voltage equipment. The isolator ensures the safe functioning of the equipment. The isolators are popular amongst industrial buyers for their uninterrupted performance and ability to withstand high electrical disturbances. The isolators can be custom made to meet the requirement of Horizontal / vertical type, single break , double break, tilting type, rotating type, single/double break consisting of hot dip galvanized iron base, etc. ISOLATORS : HT indoor isolators of following rating : A) 3.3 KV / 6.6 KV/ 12 KV / 22 KV / 33 KV. B) 400 Amp./630 Amp./1200 Amp./1800 Amp./3200 Amp.

Features : Superior quality, Longer functioning life, Available at market leading prices

Since 2004, we have been manufacturing, exporting and supplying Neutral Grounding Resistor. Under the proper observation of our experts, the offered resistor is manufactured by utilizing fine grade components with the aid of modish techniques. This resistor is extensively used in industrial power system for the purpose of grounding transformers and generators. Furthermore, the offered NGR can be availed from us at reasonable rates. Basically, Neutral Grounding Resistor is a resistance that is linked between neutral points of earth and transformer. Operational utilities and benefits : Eliminates various problems such as transitory over, lower voltages, inverse flash, inadequate current flow and others. Gives protection to transformers from damage and burning. The ohmic value remains constant, even if the temperature rises. Reduces the potential ground-fault current to a predetermined value. Also named as Earth Fault Protection, this prevents fault damage. Employed for earth fault protection in the many of the medium voltage electricity generation as well as distribution systems. Offers the best choice in terms of quick response to figure out the setback. Prevents and minimizes the overheating and mechanical stress on the conductors. Permits to hold down the ground faulty current for a short period of time to promptly discover the fault, besides protecting the transformers. Important Definitions & Construction: Rated Voltage : For NGR rated voltage means line- to neutral voltage i.e. System Voltage divided by root3 i.e. 1.732. Rated Current : Means Initial current that will flow through resistor when it is cold. Normally Full load current value is same as Rated current. Time Rating : It is length of time for which NGR must tolerate rated voltage. Short Time Rating : Normally it is 10 sec. or 30 sec. or 60 sec. depending on design parameters of protection system. IS-3043 recommends 30 sec. rating. Continuous Rating : It is normally 10 % of full load current for healthy system NGR to be designed for continuous rating of 5 % to 10 % of full load current (if required). Features Provided : Our range of NGR For Transformers does not need continuous monitoring or maintenance and is directly connected to the MV & LV supply network in order to render shield to transformers from harmful current. Offered Neutral Grounding Resistor comes with better features between the neutral point of the transformer and the ground, which Some features are below: Safety Screen for enclosures. Potential transformers. Neutral Grounding Transformer / Excitation Transformer. Supporting Pedestal structures. Stand off insulators. Aluminum enclosure instead of MS. Hot dip Galvanized enclosures. Stainless steel hardware. Earth fault leakage Relay. Termination kit. Cable gland.

Grounding is done to protect the overcurrent devices from fire and shock as well as prevent unwanted voltage on non-current-carrying metal objects. National Resistors is a leading manufacturer of power generation industry products. It serves the requirements of several industries, like cement, power utility, oil & gas, electricity generation, transmission and distribution, etc. One such product provided by the company is Neutral grounding panel, mainly used for transformer neutral earthing and general neutral earthing. This panel is designed in a way to deliver high performance, efficacy in functionality and require low maintenance. The buyers looking for neutral grounding panel that can easily be installed int their set-up can contact us. Apart from standard design, the engineers ate our company can also make certain changes as per their requirements

Neutral Earthing Resistors are used to restricts the flow of current during an earth fault on an alternate current distribution system. The resistor is connected between the neural point of a transformer and earth or generator and earth. The neutral earthing resistors offer dependable protection every time whenever there is a fault. Neutral Earthing Resistor are used in power distribution, mining and industrial installations etc. The resistor is designed to tolerate most hazardous work conditions and atmospheric changes. Neutral Earthing Resistor is known for durability and reliability. Highlights: Resistance value pre-determined to operate fault-clearing relays and to prevent damages. System is designed as per to current and time ratings and compatible with the protection switch gear Resistance value is precise and determined and remains constant throughout life. Made from tough steel grids of a high quality iron-chrome-aluminium Non-corroding and offer good stability Mica and ceramic insulators Resistor in fully protected and ventilated steel enclosures

Type : Grounding Resistor

Certification : CE Certified

Frequency : 50Hz

Warranty : 2Years

The manufacturing companies develop a variety of power generation industry products, like resistors, isolators, load banks, isolator panels, etc. The motorised isolator panel are used for keeping safe indoor isolators. The company develops its products from its factory in Shelarwasti, Chikhli, Maharashtra. The frame of the panel is developed with high grade metal which is coated with paint to keep it protected and corrosion resistant. The motorised isolator panel is an enclosed panel with three doors. The panels we supply have passed through the tests conducted in-house by experts. The ISO 9001:2008 certified company follows quality control measures throughout the production process. It delivers the isolator panels along with their manuals and test certificate. The interested buyers can contact us today.

Buy various high quality Motor Control Resistors online globally in various models having high efficiency and longer service life as per changing market demands We are offering Starting/Motor Control Resistors. For starting / Speed Control of A.C or D.C. Motors, resistors are manufactured as per customers requirement at specified starting torque or for limiting initial inrush current to an acceptable value. Mainly these are used for cranes. Rating can be 2 minute, 5 minute, 10 minute, continuous or intermittent. Material of resistor is normally Stainless steel AISI-304, AISI -410 or AISI 430 or FeCrAl-AISI-406. Standards Followed: IPSS-1-10-002-82 with amendment no.1 and BS 587 for starting / speed control resistor. IS 2147 & IS 12063 of 1987 for degree of protection for enclosure. IS 5 for paint shade. Any other standard as required can also be followed. TESTS:- (A). ROUTINE TESTS: - FOLLOWING TESTS WILL BE CONDUCTED. Visual and Dimensional Insulation resistance value measurement by using 500V megger before and after dielectric test. Resistance value measurement with ± 10 % tolerance. H.V. Test of twice the rated voltage +1000 volts for voltage class below 660 volts. TYPE TESTS:- Temperature rise test i.e., Heat run test if required will be conducted by passing equivalent / rated current for rated / equivalent time keeping IT Constant through a part of Resistor. Starting / Speed Control resistor Product Information: Rotor volts at standstill. Rotor Current at full load. Duty rating (Time on / off No. of Cycles). Starting Torque in percentage of full load Torque. Material of Resistor. No. of steps / sections and its resistance values per phase. Type of enclosure (Protection Class as per IS-12063). Temperature rise allowed. Whether terminals should be brought down at one place. Details of atmospheric conditions at site. For Buffer resistors : Rotor volts at standstill. Rotor Current at full load. Percentage (%) of slip required.

Since inception, our company is counted among the prime manufacturers of OFF-Load Indoor Panel Mounted Isolator. The range of isolators is designed from the best available raw materials using modern production machines and technologies. The range is designed from the shock proof body to ensure maximum durability along with minimum maintenance. Excellent thermal isolation and vibration free features of the collection ensure its long lasting excellent performance. Simple to install, easy to maintain and rigid structure are some of the striking factors of the product that make it highly popular in the market. Our range is designed in different sizes and dimensions according to the needs of the patrons to fulfill their precise demands at very lowest prices within the stipulated time frame.

National resistor engaged in offering of Load Banks for Industrial Automation. Known for its compact structure and high level of efficiency, Load Banks are highly appreciated in the market. What Is Load Bank : Load banks are compact units that are coupled to the output of your power generation system such as diesel generators, gas turbines or UPS and battery systems Load banks are dummy loads, designed to simulate the plant load and prove the design, performance and the capacity of the system, without interruption to the normal running of your plant

We are the most prominent Load Bank Manufacturer which includes portable load bank, electrical load bank. Load bank develops electrical load, applies the load to the electrical power source and dissipates the resultant power output from the source. Load bank accurately mimics the operational load that a power source will see in actual application. It is a self-contained, unitized, systematic device for developing electrical load and applying the same to an electrical power source for converting or dissolving the power output. The electrical load bank is used in UPS system testing, testing the functioning of turbines, Battery system testing, load optimization in heavy duty power applications, factory testing of engine generator sets, To reduce "wet stacking" problems etc. National Resistors offers load banks and auxiliary equipment necessary to handle these applications.

Color : Metallic

Output Type : AC Single Phase, AC Three Phase

Frequency : 50hz

Automatic Grade : Automatic

Tensile Strength : 0-25Mpa, 100-125Mpa

Feature : Easy To Install, Superior Finish

Warrenty : 1year

Production Power : 100-250kw, 250-500kw

Temperature Capacity : High Temperature, Low Temperature, Medium Temperature