Nucon Switchgears Private Limited

Focal Point, Ludhiana, Punjab

NUCON Transformers area proven as global technology in transformer. This technology with our expertise in transformers has resulted in a large range of very compact and cost efficient transformer. Transformers are available with off-circuit tap changer and / or load tap changes for voltage regulation.

• Better shield circuit strength
• Compact design
• Durable
• Optimum losses
• Use of magnetic shields to control strong flux
• Low flux density to withstand severe over excitation
• Thermally upgraded paper to improve transformer life time
• Insulation dressing optimization using FEM analysis
• Denergized tap changes (DTC) are typically provided in transformers
• optionally but load tap changes (LTC) are also available
• Available fluids : mineral oil and luminal oil customized design

• Transforming medium voltage into high voltage levels
• Based on tried and tested technologies
• Meeting the latest I.E.C. technical specification
• Large overload capability depending on the ambient temperature
• Large overvoltage capability on generator side to withstand the overvoltage coming for load rejection
• Customized solution
• Satisfying specific customer requests
• Equipment for indoor and outdoor usage

Transformers are tailer-made products and the deisgn varies with the impedence levels (constant Ohmic and constant percentage), transmission voltage and cooling requirments. These are normally provided with on load tap changer for voltage variations. For long distance ruler power distribution lines, speacial autotransformers with automatic tap changing equipments are inserted as voltage regulations, so that customers at the far end of the line receive the same average voltage as those closer to the source. The variable ratio of the autotransformers compensates for the voltage drop along the line.

• Thermally upgraded paper to improve transformer life time
• Low flux density to withstand severe over excitation
• Use of magnetic shields to control strong flux
• optimum losses
• Better shield circuit strength
• enviornment friendly

• Base on tried and tested technologies
• Meeting the latest I.E.C technical specification
• Large overload capability depending on the ambient temperature
• Large over voltage capability on generator side to withstand the overvoltage coming for load rejections
• customized solution
• Satisfying specific customer requests
• Equipments for indoor and outdoor usage

The utilized substation is a state-of-the-art system which simplifies conventional substation design.NUCON'S (ISO 9001:2008 CERTIFIED CO.) fully engineered factory built design, is tailor made to customer needs. the company takes the total responsibility of engineering and building the complete USS are subject to stringent internal quality checks. the housing is made from a composition of Aluzinc sheet steel having thickness of 2mm, 1.5mm mild steel and 4mm structure member base frame and then power coated.

Unitized substations may be indoor or outdoor, with a selection of high - voltage incoming sections, a choice of transformers types and an arrangement of switchgear to suit the application.Most switchgear to suit the application.Most switchgear assemblies are configured as unit substations.Unitized substation follow the system concept of locating transformers as close as practicable to areas of load contentration at utilization voltages, thus minimizing the lengths of secondary distribution cables and buses.

• Specific arrangements of switchgear minimizes installation expenses.
• Lengths of cables and buses are minimized, reducing the likelihood of faults and improving voltage regulation.
• Wide choice of components and ratings to meet exact application requirement allows for extreme flexibility.
• complete coordination, both mechanical and electrical, provides for improved service continuity.

• Compact in contruction, occupies less floor space and does not effect the elevation of commercial complex.
• Easy to operate and maintain
• In accessible to live parts.
• Fully compartmentalized design.
• Substation housing is divided into three segregrated compartments i.e. the HV compartment, the transformer compartment and the LV compartment
• All fastness are SS/Steel Zinc plated.
• The roof is special, heating due to solar radiation is minimized by the use of double skin roof and having slanted top.Air insulates the substation from the effect of sun radiation and specially designed ventilation opening facilitate air circulation, thereby supporting complete cooling system.

• It comes in two versions i.e. vacuum circuit breaker RMU & HV Fuse RMU or load break switch.
• Normally NUCON utilizes vacuum circuit breaker together with a self powered over current protection system in place of switch fuse switch combination. The RMU has been designed to IEC62271-100, IEC60694 standards.

Transformer & associated equipments connected in the network is normally a complex and delicate systems. The protection of system & people working around it, is reliable opertaion to meet the expectations of users is extremely important. Here comes the role of Transformer Control & Relay Panels.

Complete designing CONCEPT to COMMISSIONING is undertaken, keeping in view the simplicity & ease of operation, high reliability & timely performance. In the early stages of Project, the requirments are known only in general sense. NUCON undertakes such development & designing, supply & commissionings to meet voltage ranges upto 132 KV class. We also undertake to supply Control & Relay Panels for line Feeders, Transformers, Bus Couplers Transfer Breakers of varius system voltages.

NUCON has supplied large number of Control & Relay Panels to clients spread over number of countries in varius sector. The equipment has been supplied both for green fields & refurbished projects.

We begin the protection & Control Design with the preparation / development of single line diagram (SLD), indicating the

• Bus arrangments
• Major equipment to be used
• General information regarding metering /SCADA relay interconnections & needed communications.
• Customer Protection & Control Philosophy

NUCON further develops the SLD baseed on performance analysis / risk factory and IEC guidlines. The final package / design offered brings out clear and accurate customer's requirments into a visible shape.

The NUCON make Outdoor vacuum Switchgear Type PCVCB, is an outdoors, Structure mounted, easy to instal, vacuum s witchgera for use in 13/36 KV system. it is a porcelain-cald construction similar to conventional outdoor high voltage switchgear and is a gang operated triple pole circuit breaker fitted with reliable and well-proven vacuum interrupters. Adequate phase clearances and height have been provided to meet Standards and safety requirments. It is suitable for direct connection to overhead supply lines.

The type PCVCB design incorporates a minimum of moving parts and simplicity of assembly assuming a long mechanical and electrical life. All fundamental advantage due to use of vacuum interrupters like low drive energy, light weight construction, virtually shock free performance leading to ease of erection and reduction of foundation requirments etc. has been retained.

The NUCON make PCVCB Vacuum switchgears are designed to handle all the switching duties that occur in primary distribution systems including rapid auto re-closing. The breakers are extremely reliable in service, require minimum space and have a long life expectance due to use of Vacuum interrupters. Moreover small size and weight, quiet and low vibration operation and high temperature sustainability enable the breakers to be used in hazardous locations.

• CONFORMS TO IEC / IS
• LOW CONTACT ERISION
• SUITABLE FOR AUTO RE-CLOSING DUTY
• HIGH ELECTRICAL / MECHANICAL LIFE
• TOTALLY RE-STRIKE FREE
• HIGH RELIABILITY DUE TO LOW LINKAGE MECHANISM

The switchgear is designed in accordance with the requirements of metal-clad enclosed switchgear under the standard IEC 62771-200.The switchgear is composed of the compartment body & center located withdrawable parts. The compartment body of switchgear is divided into four independant compartments.The protective level of the enclosure is IP4X. While the protective level is IP2X between the compartments and when the door of circuit breaker compartment is open.variable scheme are available such as overhead in-coming feeder and outgoing feeder, cable incoming feeder and outgoing feeder and other functions.A number of power distribution equipment with different functions could be analyzed after arrangements and combination of various schemes. The erection, adjustment and maintainance could be undertaken in the front of switchgear so that the switchgear could be back to back combined together in double arrangement and mountained against the wall.It has a high flexibility and safety with less floor space.

• Conforms to IEC/IS
• Internal arc proof
• Suitable for capacitor switching and auto re-closing duty
• Fully air insulated, robust construction and extensible
• HV and LV compartment are fully segregated
• Dust protected and vermin proof -IP4X
• Integral Earthing by fault make earth switch/ Earth truck
• Comprensive electrical/Machanical safety interlock
• Mechanism with minimum operating linkages
• Cable box suitable for multiple cable termination
• Upto 12 kv, 25 Ka, 1600 Amp

Drop out fuses are used for fault protections in rural electrification, distribution system, industrial units having medium voltage connections both as primary and secondary back ups. The drop out fuse should operate before the connected equipment i.e transformer gets damaged. Generally D.O Fuses are used as switching device along with protection and operated with the telescopic insulated rods from the ground level.

The operation of drop out fuse is extremely violent. Once the fuse blows off, the arc restrikes till it is quenched.Even few cycles are sufficient to damage the current carrying parts and the barrel.NUCON over a period of time has aquired expertise in the manufacturing of drop out fuses to withstand such short circuit currents.

The NUCON drops out fuses are designed to accomodate button head type fuse elements. The high pressure, electroplated copper alloy components are used to provide better contacts and longer life.

NUCON manufactures various models as per IEC 282-2 or IS 9385-2 to customer needs. single insulator type, Bracket type & Universal type models are available up to 33KV.

NUCON On load Switch Disconnectors (Load break switches) are manually operated 4 pole switches with compact design for application in low voltage distribution circuits and motor circuits. the switches are compact and suitable for AC 23A duty.

ALL CO-SERIES Switches are capable of making, carrying & breaking currents under normal circuit conditions, which may include operating under overload conditions and also carrying currents under specified abnormal circuit conditions, such as short circuit for a specified time.

Conforms to IEC - 60947 - 1 & 3, IS - 13947 - 1 & 3

Current range 40 A to 3150 A in nine frame sizes in four Pole in Open Execution & thick Sheet Steel Enclosure

• While breaking the circuit, guaranteed sufficient air sectioning clearance.
• Utilization category - AC 23A.
• Strong endurance and resistance to heat (Tropicalised).
• Flag indicator for two stable positions (I-O) & possible switching on or off, on load, there by fulfilling the roll of switching device.
• All current carrying parts are of special grade E.T.P. Copper and with silver plated.
• Knife type contact system with self wipe feature allows cleaning of contact during each operation, calling for lesser maintenance and longer life.