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Selector switch spares
Alluminium clamps
Aluminium Clamp – Product Description
The Aluminium Clamp is used to securely hold and position conductors, cables, and contact assemblies inside the tap changer system. It ensures firm mechanical fixing while allowing proper electrical connectivity and thermal expansion.
Made from corrosion-resistant aluminium alloy, the clamp offers high strength with lightweight construction. It provides excellent stability under vibration and temperature variations commonly found in transformer environments.
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Diverter switch spares
Base plate
NGEF Base Plate – Product Description
The NGEF Base Plate is a fundamental structural component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It serves as the main supporting foundation for mounting and securing critical components such as contacts, resistors, switching mechanisms, and operating linkages. By providing a stable and rigid base, the base plate ensures proper alignment and smooth functioning of the entire diverter switch assembly.
Manufactured from high-strength, heat-resistant, and corrosion-protected materials, the NGEF Base Plate offers excellent mechanical durability and long-term reliability. Its robust construction enables it to withstand vibration, thermal stress, and continuous operational loads inside the transformer tank. The precision-machined mounting points allow accurate fitting of components, reducing mechanical misalignment and wear.
The base plate also plays an important role in maintaining operational safety by supporting proper spacing between electrical parts and minimizing mechanical movement during switching.
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Selector switch spares
Base plate
Base Plate – Product Description
The Base Plate is a fundamental structural component used in NGEF transformer selector and diverter switch assemblies. It provides strong mechanical support for mounting and aligning internal switching parts, ensuring stable operation during tap changing. Designed with precision-machined surfaces and mounting holes, it helps maintain correct positioning of moving and fixed components inside the OLTC system.
Manufactured from high-grade insulating or metallic materials, the base plate offers excellent resistance to heat, oil, and mechanical stress. Its rigid construction minimizes vibration and misalignment, contributing to smooth operation and long service life of the tap changer mechanism.
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Motor drive spares
Beading
Beading – Product Description
Beading is a flexible sealing component used in transformer tap changer and motor drive assemblies to provide effective protection against dust, moisture, and external contaminants. It is typically installed along panel edges, doors, and enclosure joints to ensure a tight and secure seal. This helps maintain internal component safety and improves the overall durability of the system.
Manufactured from high-quality rubber or synthetic elastomer materials, beading offers excellent flexibility, weather resistance, and long service life. It maintains sealing performance even under temperature variations and mechanical stress, ensuring reliable operation in industrial environments.
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Motor drive spares
Bevel gear
Bevel Gear – Product Description
The Bevel Gear is a precision mechanical component used in transformer tap changers and motor drive systems to transmit power between shafts arranged at an angle, usually at 90 degrees. It helps in changing the direction of rotation while maintaining smooth and efficient power transfer. This gear plays an important role in ensuring accurate movement and reliable operation of drive mechanisms.
Manufactured from high-grade alloy steel and machined with high accuracy, the bevel gear offers excellent strength, durability, and wear resistance. Its well-designed tooth profile reduces noise and vibration during operation. The robust construction ensures long service life under continuous load conditions, making it suitable for heavy-duty industrial and electrical applications.
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Diverter switch spares
Collar gasket
NGEF Collar Gasket – Product Description
The NGEF Collar Gasket is a critical sealing component used in On-Load Tap Changer (OLTC) and diverter switch assemblies of power transformers. It is installed between mating flanges and housings to provide a reliable oil-tight and air-tight seal. By preventing leakage of transformer oil and blocking moisture or contaminants, the collar gasket plays an important role in maintaining internal insulation strength and operational safety.
Manufactured from high-quality oil-resistant rubber and synthetic elastomers, the NGEF Collar Gasket offers excellent elasticity, compression stability, and long service life. Its precision-moulded design ensures uniform pressure distribution across the sealing surface, reducing the risk of seepage and mechanical stress. The gasket is designed to perform consistently under high temperature, pressure, and vibration conditions commonly found in transformer environments.
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Motor drive spares
Coupling hub
Coupling Hub – Product Description
The Coupling Hub is a precision-machined mechanical component used to connect and transmit torque between two rotating shafts in tap changer and motor drive assemblies. It ensures accurate power transmission while maintaining proper shaft alignment, reducing stress on connected components. This component plays a vital role in ensuring smooth and efficient operation of transformer drive mechanisms.
Manufactured from high-grade steel or alloy material, the coupling hub offers excellent strength, wear resistance, and long service life. Its robust construction minimizes vibration, absorbs minor misalignment, and enhances overall mechanical reliability under continuous operating conditions.
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Diverter switch spares
Diaphragm
NGEF Diaphragm – Product Description
The NGEF Diaphragm is a critical safety and pressure-regulating component used in diverter switch assemblies of OLTC systems. It is designed to control internal pressure variations and protect equipment from excessive stress caused by gas generation or oil expansion. By acting as a flexible barrier, the diaphragm helps maintain stable internal conditions during switching operations.
Made from high-quality heat-resistant and oil-compatible materials, the NGEF Diaphragm offers reliable performance under extreme operating conditions. Its precision-moulded structure ensures proper sealing and controlled flexibility, reducing the risk of mechanical damage and system failure. The diaphragm enhances operational safety and prolongs equipment life.
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Motor drive spares
Drive panel contactors
Drive Panel Contactors – Product Description
Drive Panel Contactors are key switching devices used in motor drive panels and transformer tap changer systems to control the flow of electrical power. They are responsible for making and breaking circuits during motor operation, ensuring smooth starting, stopping, and directional control. These contactors play an important role in maintaining safe and efficient functioning of electrical control systems.
Manufactured using high-quality insulating materials and durable contact elements, drive panel contactors provide reliable performance under frequent switching conditions. Their compact design allows easy installation inside control panels, while strong electromagnetic operation ensures quick and precise switching. They also help in protecting motors and equipment from overloads and electrical faults, improving system reliability and service life.
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Diverter switch spares
Fixed contact
NGEF Diverter Switch Fixed Contact – Product Description
The NGEF Diverter Switch Fixed Contact is a critical electrical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It serves as a stable and permanent contact point that works in coordination with the moving contact to ensure smooth and reliable current transfer during tap changing operations. By maintaining consistent electrical connection, the fixed contact helps achieve uninterrupted voltage regulation and stable system performance.
Manufactured from high-quality copper alloys and fitted with flexible braided connectors, the NGEF Fixed Contact offers excellent electrical conductivity and low contact resistance. Its robust mounting structure ensures firm positioning inside the diverter switch assembly, minimizing vibration and mechanical stress during operation. The advanced insulation and protective coating enhance resistance to heat, oil contamination, and electrical wear, resulting in long service life.
The fixed contact is designed to withstand high current loads and repeated switching cycles without performance degradation. Its precision-engineered surface provides uniform contact pressure, reducing arcing and contact erosion. The maintenance-friendly design allows easy inspection and replacement, helping reduce transformer downtime and operational costs.
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Motor drive spares
Handle
Handle – Product Description
The Handle is a manually operated component used in transformer tap changers and motor drive mechanisms to control switching and positioning operations. It enables smooth and precise movement of internal gears and shafts, allowing operators to change tap positions safely and efficiently. The ergonomic design ensures comfortable handling and reduces operator fatigue during repeated use.
Manufactured from high-strength metal with corrosion-resistant coating, the handle provides excellent durability and long-term reliability in industrial environments. Its rigid construction ensures stable torque transmission and minimizes wear, making it suitable for continuous and heavy-duty operation.
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Selector switch spares
Insulating sleeves
Insulating Sleeve – Product Description
The Insulating Sleeve is used to electrically isolate conducting parts inside the selector switch and diverter mechanism. It prevents current leakage and short circuits by providing reliable insulation between live components and metal structures. This helps maintain safe and efficient transformer operation under high-voltage conditions.
Made from high-quality insulating materials, the sleeve offers excellent thermal stability and dielectric strength. It is designed to fit securely around conductors and shafts, ensuring consistent insulation even during continuous switching operations.
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Diverter switch spares
Knife lever
NGEF Knife Lever – Product Description
The NGEF Knife Lever is a vital mechanical linkage component used in On-Load Tap Changer operating mechanisms. It plays a key role in transferring motion between moving parts during tap-changing operations. By enabling precise mechanical movement, the knife lever supports smooth and synchronized switching of transformer taps.
Manufactured from high-strength alloy steel and precision-machined materials, the NGEF Knife Lever provides excellent mechanical stability and long service life. Its corrosion-resistant finish and robust structure allow reliable operation in oil-filled and vibration-prone environments. The lever helps minimize mechanical losses and ensures consistent performance.
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Diverter switch spares
Main contact with flexible connector
NGEF Main Contact with Flexible Connector – Product Description
The NGEF Main Contact with Flexible Connector is a key electrical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to carry the main load current during normal operation while providing a reliable and stable electrical connection between moving and fixed parts. The flexible connector ensures continuous current flow even during mechanical movement, helping to maintain uninterrupted voltage regulation.
Manufactured using high-quality copper alloys and flexible braided conductors, this main contact offers excellent electrical conductivity and low contact resistance. The flexible shunt absorbs mechanical stress caused by repeated switching operations, vibration, and thermal expansion, thereby protecting the contact surfaces and extending service life. Its robust construction ensures dependable performance under heavy load and harsh operating conditions inside transformer tanks.
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Motor drive spares
Marshaling box
Marshaling Box – Product Description
The Marshaling Box is an essential control and junction enclosure used in transformer on-load tap changer (OLTC) and motor drive systems. It is designed to collect, organize, and distribute control, signal, and power cables from various field devices to the main control panel. This ensures safe and systematic wiring, improving overall system efficiency and reliability.
Manufactured from high-quality sheet metal with a protective surface coating, the marshaling box offers excellent durability and resistance to environmental conditions. Its well-designed internal layout allows easy termination, inspection, and maintenance of cables. The enclosure protects internal components from dust, moisture, and mechanical damage, ensuring stable performance during continuous operation.
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Motor drive spares
MECD LS1 Limit switch
MECD LS1 Limit Switch – Product Description
The MECD LS1 Limit Switch is a reliable control and safety device used in transformer tap changers and motor drive mechanisms to detect and limit the movement of mechanical parts. It helps in stopping or controlling operation at preset positions, preventing over-travel and possible damage to equipment. This switch plays a vital role in ensuring accurate positioning and safe functioning of electrical and mechanical systems.
Designed with robust housing and high-quality contact terminals, the MECD LS1 Limit Switch provides consistent performance under repeated switching operations. Its compact structure allows easy installation inside control panels and drive assemblies. The durable construction ensures long service life, even in demanding industrial environments, while maintaining stable and precise switching action.
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Diverter switch spares
Micro switch assembly
NGEF Micro Switch Assembly – Product Description
The NGEF Micro Switch Assembly is an essential control and monitoring component used in On-Load Tap Changer systems. It is designed to detect and signal the position of moving parts during tap-changing operations. By providing accurate electrical feedback to the control system, the micro switch assembly helps ensure safe, synchronized, and reliable switching of transformer taps.
Built with high-quality electrical contacts and durable mechanical housings, the NGEF Micro Switch Assembly delivers consistent performance even under frequent operation. Its compact and rugged construction allows stable functioning in oil-filled and vibration-prone environments. The assembly is designed for precise actuation, long switching life, and easy replacement, helping improve overall OLTC reliability and operational safety.
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Diverter switch spares
Middle plate
NGEF Middle Plate – Product Description
The NGEF Middle Plate is an important structural and insulating component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to provide strong mechanical support and accurate alignment for internal components such as contacts, resistors, and switching mechanisms. By maintaining proper spacing and positioning, the middle plate ensures smooth operation and reliable performance of the diverter switch assembly.
Manufactured using high-quality insulating and heat-resistant materials, the NGEF Middle Plate offers excellent electrical insulation and mechanical stability. Its robust construction helps withstand vibration, thermal stress, and continuous operational loads inside the transformer tank. The precision-machined surface ensures correct mounting of components, reducing the risk of misalignment and mechanical failure.
The middle plate also plays a vital role in improving safety by preventing electrical leakage and minimizing the chances of internal flashovers.
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Motor drive spares
Motor
Motor – Product Description
The Motor is a vital electromechanical component used in transformer on-load tap changer and drive box systems to provide controlled rotational power for operating mechanical mechanisms. It converts electrical energy into mechanical motion, enabling smooth and reliable movement of gears, couplings, and control assemblies. The motor ensures accurate tap position changes and stable system performance.
Designed with high-quality insulation and precision-engineered parts, this motor offers efficient operation, low noise, and long service life. Its robust construction allows continuous operation under varying load conditions while maintaining safety and reliability.
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Motor drive spares
Motor drive box assembly
Motor Box Assembly – Product Description
The Motor Box Assembly is a complete control and protection unit used in transformer tap changer systems for operating the motor-driven mechanism. It houses electrical components such as contactors, relays, terminals, fuses, and control circuits that manage the starting, stopping, and direction of the motor during tap changing operations.
This assembly ensures safe and reliable functioning of the motor by providing proper power distribution, overload protection, and control logic. It is designed for continuous operation in demanding environments and helps maintain smooth, accurate, and trouble-free tap changer performance.
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Motor drive spares
Motor drive panel
Motor Drive Panel – Product Description
The Motor Drive Panel is an essential control unit used in transformer tap changer systems to regulate and operate the motor-driven mechanism. It contains electrical components such as contactors, relays, control switches, indicators, and protection devices that ensure smooth and accurate tap changing operations.
This panel manages the forward and reverse movement of the motor, monitors operating conditions, and protects the system from electrical faults. It is designed for stable performance, high reliability, and long service life in substation and industrial environments.
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Motor drive spares
Mounting plate
Mounting Plate – Product Description
The Mounting Plate is a precision-engineered structural component used in transformer tap changer and motor drive assemblies to securely support electrical and mechanical parts. It provides a stable base for fixing relays, contactors, switches, terminals, and control modules in a well-organized manner.
Manufactured from high-strength metal with accurate dimensions, this mounting plate ensures proper alignment of components, reduces vibration, and improves overall system reliability. Its robust construction helps maintain stability under continuous operating conditions and simplifies installation and maintenance.
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Diverter switch spares
Moving contact
NGEF Diverter Switch Moving Contact – Product Description
The NGEF Diverter Switch Moving Contact is a vital mechanical and electrical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It plays a key role in transferring current smoothly between fixed contacts during tap changing operations. Designed for precision movement and reliable electrical conduction, the moving contact ensures stable voltage regulation while the transformer remains in service.
Manufactured using high-quality copper alloys, flexible braided conductors, and high-strength mechanical parts, this moving contact offers excellent conductivity, low resistance, and strong mechanical durability. Its spring-loaded and lever-operated mechanism provides accurate positioning and consistent contact pressure, which helps reduce sparking and contact wear during switching operations. The flexible copper shunt ensures uninterrupted current flow even during repeated movements.
The NGEF Moving Contact is designed to operate reliably under heavy electrical and mechanical stress. Its robust insulation base and corrosion-resistant components protect it from oil contamination, heat, and vibration inside the transformer tank. The maintenance-friendly design allows easy inspection, adjustment, and replacement, helping to minimize downtime and extend service life
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Motor drive spares
MPCB with trip coil
MPCB with Trip Coil – Product Description
The MPCB with Trip Coil is a protective switching device used in motor drive and transformer tap changer systems to safeguard motors and electrical circuits from overload, short circuit, and fault conditions. It combines manual motor protection with an automatic tripping mechanism to ensure safe and reliable operation in industrial environments.
Designed with high-quality insulating and conductive materials, this MPCB provides accurate current sensing and fast tripping during abnormal conditions. The integrated trip coil allows remote or automatic shutdown, improving system safety, minimizing equipment damage, and reducing downtime during faults.
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