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Motor drive spares
Multi contact dial switch
Multi Contact Dial Switch – Product Description
The Multi Contact Dial Switch is a precision control device used in motor drive systems and transformer tap changer applications to select and regulate different operating positions. It enables smooth and accurate switching between multiple electrical circuits through a rotary dial mechanism, ensuring reliable signal transmission and proper system coordination. This switch plays an important role in controlling sequence operations and monitoring functions in electrical panels.
Manufactured with high-quality insulating materials and durable contact elements, the multi contact dial switch offers consistent performance under repeated operation. Its compact structure allows easy mounting inside control panels, while clearly defined contact positions improve operational accuracy. The robust design minimizes wear and electrical losses, making it suitable for long-term industrial use in demanding environments.
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Diverter switch spares
NGEF Diverter Switch 300 Amps
NGEF Diverter Switch – 300 Amps
The NGEF 300 Amps Diverter Switch is a reliable and efficient switching device designed for use in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is engineered to perform smooth tap changing operations under load conditions while maintaining uninterrupted power supply. With a rated current capacity of 300 amperes, this diverter switch is ideal for medium-load transformer applications where stable voltage regulation and consistent performance are essential.
Manufactured using high-quality conductive materials and advanced insulation systems, the NGEF 300A Diverter Switch offers low contact resistance, excellent thermal stability, and long operational life. Its effective arc-control mechanism reduces electrical wear during switching operations, helping to protect internal components and extend service intervals. The strong mechanical structure ensures reliable performance even under continuous operation and varying load conditions.
The diverter switch is designed with precision-engineered main and transition contacts that enable safe current transfer between tap positions. These contacts work in coordination with transition resistors or reactors to prevent short circuits, voltage fluctuations, and electrical disturbances. Its maintenance-friendly design allows easy inspection, cleaning, and replacement of parts, reducing downtime and operational costs.
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Diverter switch spares
NGEF Diverter Switch 500 Amps
NGEF Diverter Switch – 500 Amps
The NGEF 500 Amps Diverter Switch is a high-performance switching component designed for use in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is specially engineered to handle a rated current of up to 500 amperes, ensuring smooth and reliable tap changing under full-load conditions without interrupting the power supply. This makes it an ideal solution for maintaining stable voltage levels and consistent power quality in demanding electrical networks.
Manufactured using premium-grade conductive materials and high-strength insulating components, the NGEF 500A Diverter Switch offers low contact resistance, excellent current-carrying capacity, and superior thermal stability. Its advanced arc-quenching and contact protection system minimizes electrical erosion during switching operations, reducing wear and extending operational life. The rugged mechanical structure provides high durability and dependable performance even under continuous and heavy-load conditions.
The diverter switch is equipped with precision-designed main and transition contacts that enable smooth current transfer between tap positions. These contacts operate in coordination with transition resistors or reactors to prevent short circuits, voltage fluctuations, and transient disturbances. The securely mounted terminals and high-dielectric insulation system ensure safe electrical connections and protection against internal flashovers
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Diverter switch spares
NGEF Diverter switch cylinder
NGEF Diverter Switch Cylinder – Product Description
The NGEF Diverter Switch Cylinder is a crucial component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It functions as a protective and functional housing for the internal diverter switching mechanism, helping to maintain stable operating conditions during tap-changing operations. By enclosing and supporting critical components, the cylinder ensures smooth current transfer and reliable voltage regulation without interrupting the power supply.
Manufactured from high-quality insulating and heat-resistant materials, the NGEF Diverter Switch Cylinder offers excellent mechanical strength and electrical safety. Its robust cylindrical structure is designed to withstand high electrical stress, oil immersion, temperature variations, and continuous operating loads. The precision-engineered design supports proper alignment of internal parts, reduces vibration, and minimizes wear, resulting in long service life and dependable performance in harsh transformer environments.
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Diverter switch spares
NGEF OLTC diverter O ring
NGEF OLTC Diverter O-Ring – Product Description
The NGEF OLTC Diverter O-Ring is a vital sealing component used in the diverter switch assembly of On-Load Tap Changers in power and distribution transformers. It is designed to provide a secure oil-tight and air-tight seal between mating surfaces, preventing transformer oil leakage and blocking the entry of moisture, dust, and contaminants. By maintaining proper sealing, the O-ring helps preserve insulation strength and ensures stable and safe tap-changing operations.
Manufactured from high-quality oil-resistant and heat-resistant elastomer materials, the NGEF Diverter O-Ring offers excellent elasticity, compression stability, and long-term durability. Its precision-moulded circular design ensures uniform contact pressure, reducing the risk of seepage and premature wear. The O-ring performs reliably under high temperature, pressure, and vibration conditions commonly found inside transformer tanks, contributing to extended equipment life and reduced maintenance requirements.
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Diverter switch spares
NGEF OLTC Diverter switch load shifter
NGEF OLTC Diverter Switch Load Shifter – Product Description
The NGEF OLTC Diverter Switch Load Shifter is a key electrical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to assist in transferring load current smoothly during tap-changing operations by working together with transition resistances. The load shifter helps maintain uninterrupted power supply while ensuring safe and stable voltage regulation under operating conditions.
Manufactured using high-quality resistance elements and strong metallic frames, the NGEF Load Shifter offers excellent electrical conductivity, thermal stability, and mechanical strength. Its precision-engineered resistor assembly effectively controls circulating current during switching, reducing electrical stress and preventing short circuits. The robust construction ensures efficient heat dissipation and reliable performance even under heavy load and frequent switching cycles.
The load shifter is built to withstand harsh operating environments inside transformer tanks, including exposure to heat, oil, and vibration. Its compact and maintenance-friendly design allows easy installation, inspection, and replacement, helping to reduce downtime and operational costs.
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Diverter switch spares
NGEF OLTC wedges
NGEF OLTC Wedges – Product Description
The NGEF OLTC Wedges are precision-made insulating and positioning components used in On-Load Tap Changer assemblies. They are designed to maintain correct spacing, alignment, and mechanical stability between internal parts such as contacts and support structures. By ensuring accurate positioning, these wedges help in smooth tap-changing operations and reduce mechanical stress on surrounding components.
Manufactured from high-grade insulating and heat-resistant materials, NGEF OLTC Wedges provide excellent electrical insulation and long-term durability. Their robust construction allows them to withstand oil immersion, temperature variations, and vibration inside transformer tanks. The wedges play a vital role in improving operational reliability and extending the service life of OLTC systems.
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Motor drive spares
NGEF OLTC worm gear double end
NGEF OLTC Worm Gear (Double End)
Description (Paragraph):
The NGEF OLTC Worm Gear Double End is a mechanical transmission component used in on-load tap changer (OLTC) systems of power transformers. It converts the rotary motion of the motor into controlled mechanical movement required for tap changing. The double-end design allows power transmission on both sides, ensuring balanced operation and better alignment. This component plays an important role in providing smooth, accurate, and reliable tap position changes during transformer operation.SKU: n/a -
Motor drive spares
NGEF on load tap changer drive box control gear
NGEF On Load Tap Changer Drive Box Control Gear – Product Description
The NGEF On Load Tap Changer Drive Box Control Gear is a precision mechanical assembly used to operate and regulate transformer tap changer mechanisms under load conditions. It ensures smooth and accurate transfer of motion from the motor drive unit to the tap changer, enabling reliable voltage regulation without interrupting power supply. The compact design allows efficient integration within the drive box system.
Manufactured from high-grade metal components with precise machining, this control gear offers excellent strength, durability, and consistent performance. It is designed to withstand continuous operation, mechanical stress, and industrial environments while maintaining stable and synchronized movement of internal parts.
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Diverter switch spares
NGEF on load tap changer transmission shaft
NGEF On-Load Tap Changer Transmission Shaft – Product Description
The NGEF On-Load Tap Changer Transmission Shaft is a vital mechanical component used in OLTC systems of power and distribution transformers. It is designed to transmit rotational motion from the drive mechanism to the internal switching and contact assemblies. By ensuring smooth and accurate power transfer, the transmission shaft enables precise tap-changing operations and helps maintain stable voltage regulation without interrupting the power supply.
Manufactured from high-strength alloy steel and precision-machined materials, the NGEF Transmission Shaft offers excellent mechanical durability, dimensional accuracy, and long service life. Its robust construction allows it to withstand continuous rotation, vibration, and mechanical stress inside the transformer tank. The corrosion-resistant and oil-compatible surface treatment ensures reliable performance in harsh operating environments, while its maintenance-friendly design supports easy inspection and replacement during servicing.
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Diverter switch spares
NGEF TRANSFORMER DIVERTER SWITCH
NGEF Transformer Diverter Switch – Product Description
The NGEF OLTC diverter switch employs “flag cycle” system of operation. For each phase they have two main contacts, two switching contacts and two resistor contacts. Transition resistance is connected in connected in series with resistor contact and are important because they ensure that he load current is transferred from one tap to other without interruption .
The NGEF Transformer Diverter Switch is an essential component used in On-Load Tap Changer (OLTC) systems for power and distribution transformers. It is designed to regulate transformer voltage smoothly while the transformer is in operation, without interrupting the power supply. By enabling safe and reliable tap changing under load conditions, the diverter switch helps maintain stable voltage levels and improves overall power quality in electrical networks.
Manufactured using high-grade conductive and insulating materials, the NGEF Diverter Switch offers high current-carrying capacity, low contact resistance, and excellent mechanical strength. Its advanced arc-control system minimizes contact wear and reduces electrical stress during switching operations, thereby extending the service life of both the switch and the transformer. The robust construction ensures reliable performance even in harsh operating environments and heavy-load conditions
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Motor drive spares
NGEF Transformer motor drive mechanism
NGEF Transformer Motor Drive Mechanism – Product Description
The NGEF Transformer Motor Drive Mechanism is a vital control unit used to operate the On-Load Tap Changer (OLTC) system in power transformers. It provides automatic and manual control for changing tap positions, allowing smooth voltage regulation without interrupting the power supply. The mechanism converts electrical signals into precise mechanical movement, ensuring accurate and reliable operation of the selector and diverter switch assemblies.
Designed with high-quality electrical and mechanical components, the motor drive mechanism offers stable performance under continuous operating conditions. It includes control relays, contactors, protection devices, and indication systems housed in a robust enclosure. This system ensures safe switching, reduces mechanical stress, and enhances the overall efficiency and lifespan of the transformer.
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Diverter switch spares
NGEF Transformer resistance contact
NGEF Transformer Resistance Contact – Product Description
The NGEF Transformer Resistance Contact is an important component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to work in coordination with transition resistors during tap-changing operations, helping to control current flow and limit short-circuit currents. By providing a temporary resistive path, this contact ensures smooth and safe voltage transition without disturbing the power supply.
Manufactured using high-quality conductive materials, strong mechanical parts, and reliable insulation systems, the NGEF Resistance Contact offers excellent electrical performance and long service life. Its spring-loaded mechanism maintains consistent contact pressure, while the flexible copper lead ensures continuous current flow during operation. This design reduces arcing, minimizes contact wear, and improves overall switching reliability.
The resistance contact is built to withstand high electrical stress, frequent switching cycles, and harsh operating conditions inside transformer tanks. Its robust mounting structure provides stable positioning and resistance to vibration, heat, and oil contamination.
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Selector switch spares
NGEF Transformer selector switch assembly
NGEF Selector Switch Assembly – Product Description
The NGEF Selector Switch Assembly is an essential part of the On-Load Tap Changer (OLTC) system used in power transformers. It is responsible for selecting different tap positions on the transformer winding while the transformer remains in operation. This allows smooth voltage regulation without interrupting the power supply. The assembly works together with the diverter switch to ensure safe and reliable switching under load conditions.
It is manufactured using high-quality conductive and insulating materials to ensure durability and stable performance in oil-filled and high-temperature environments. The assembly consists of a precision-aligned shaft, contact segments, and switching components that provide accurate tap positioning. By maintaining proper voltage control and reducing electrical stress, the NGEF Selector Switch Assembly helps improve transformer efficiency and extend service life.
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Diverter switch spares
OLTC Base plate mechanism
NGEF OLTC Base Plate Mechanism – Product Description
The NGEF OLTC Base Plate Mechanism is a core mechanical assembly used in On-Load Tap Changer systems of power and distribution transformers. It functions as the main operating platform that supports and controls the movement of internal switching components during tap-changing operations. By ensuring accurate rotation, alignment, and motion transfer, this mechanism enables smooth and reliable voltage regulation without interrupting the power supply.
Manufactured using high-strength metal alloys and precision-engineered parts, the NGEF Base Plate Mechanism offers excellent mechanical stability and long service life. Its robust construction allows it to withstand vibration, thermal stress, and continuous operating loads inside the transformer tank. Designed for easy maintenance and long-term reliability, it helps reduce mechanical wear, minimize downtime, and improve overall OLTC performance in substations and industrial power systems.
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Diverter switch spares
Resistance Compartment
NGEF Resistance Compartment – Product Description
The NGEF Resistance Compartment is a specially designed enclosure used in On-Load Tap Changer (OLTC) systems of power and distribution transformers to safely house and protect the transition resistors. It plays a vital role during tap-changing operations by providing a secure and insulated environment for the resistive elements that control and limit circulating current. By enclosing the resistors properly, the resistance compartment ensures smooth voltage transition, prevents electrical faults, and enhances overall system reliability.
Manufactured using high-strength insulating materials and durable structural components, the NGEF Resistance Compartment offers excellent thermal stability and mechanical protection. Its robust construction allows efficient heat dissipation generated during switching operations, preventing overheating and maintaining stable resistance performance. The oil-resistant and corrosion-protected surfaces ensure reliable operation inside transformer tanks under harsh operating conditions.
The compartment is designed for precise mounting and easy integration with OLTC mechanisms.
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Selector switch spares
Selector fixed contact
Selector Fixed Contact – Product Description
The Selector Fixed Contact forms a stable electrical connection point in the selector switch mechanism. It remains stationary while interacting with moving contacts during tap changes, ensuring accurate and reliable voltage selection.
Produced from high-quality conductive materials, the fixed contact offers excellent wear resistance and low electrical losses. Its robust design ensures consistent performance under repeated switching operations.
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Selector switch spares
Selector moving contact
Selector Moving Contact – Product Description
The Selector Moving Contact is responsible for switching between different tap positions by making and breaking electrical connections. It works in coordination with fixed contacts to ensure smooth and safe voltage regulation.
Designed with precision-engineered contact surfaces and spring-loaded mechanisms, it provides firm contact pressure and minimal arcing. This improves switching reliability and reduces maintenance requirements.
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Diverter switch spares
Side plate
NGEF Side Plate – Product Description
The NGEF Side Plate is an essential structural and insulating component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to provide strong lateral support and secure mounting for internal components such as contacts, resistors, and operating mechanisms. By maintaining proper alignment and spacing, the side plate ensures smooth mechanical operation and reliable electrical performance of the diverter switch assembly.
Manufactured from high-quality insulating and heat-resistant materials, the NGEF Side Plate offers excellent electrical insulation and mechanical strength. Its robust construction allows it to withstand vibration, thermal stress, and continuous operational loads inside the transformer tank. The precision-machined design ensures accurate fitting of components, reducing the risk of misalignment, wear, and mechanical failure.
The side plate also plays an important role in enhancing operational safety by preventing electrical leakage and minimizing the possibility of internal flashovers.
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Diverter switch spares
Slider
NGEF Slider – Product Description
The NGEF Slider is an essential mechanical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to guide and support the smooth linear movement of switching and contact mechanisms during tap-changing operations. By ensuring accurate positioning and controlled motion, the slider plays a key role in maintaining reliable voltage regulation and stable transformer performance.
Manufactured from high-strength, wear-resistant materials, the NGEF Slider offers excellent mechanical durability and long service life. Its precision-engineered surface reduces friction and ensures smooth sliding action, minimizing mechanical stress on connected components. The robust construction allows it to withstand continuous operation, vibration, and temperature variations inside the transformer tank.
The slider is designed to maintain proper alignment between moving parts, preventing jamming, misalignment, and uneven wear. This helps improve the overall efficiency of the diverter switch mechanism and reduces the risk of mechanical failure.
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Selector switch spares
Slip ring
Slip Ring – Product Description
The Slip Ring is an important current-carrying component used to transfer electrical power between stationary and rotating parts of the selector switch system. It ensures continuous electrical connection during tap-changing operations without interruption.
Manufactured from high-conductivity alloys, the slip ring provides low contact resistance and stable performance. Its smooth surface reduces wear on brushes and contacts, helping extend maintenance intervals and improve system reliability.
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Diverter switch spares
Switching crank
NGEF Switching Crank – Product Description
The NGEF Switching Crank is an essential mechanical component used in OLTC operating systems to convert rotary motion into controlled linear or angular movement. It connects the drive mechanism with internal switching parts, enabling precise and reliable tap-changing operations. The switching crank ensures accurate synchronization between mechanical and electrical systems.
Produced from high-quality metal alloys and engineered for precision, the NGEF Switching Crank delivers excellent durability and performance. Its sturdy construction withstands repeated operations, vibration, and load stress. The crank’s design supports easy maintenance and helps improve the overall efficiency and reliability of OLTC systems.
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Diverter switch spares
Switching lever
NGEF Switching Lever – Product Description
The NGEF Switching Lever is an important mechanical component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is responsible for transmitting motion from the drive mechanism to the contact assembly, enabling accurate and smooth switching between tap positions. By ensuring precise movement and proper alignment, the switching lever plays a vital role in maintaining reliable voltage regulation and stable transformer operation.
Manufactured from high-strength metal alloys and precision-machined components, the NGEF Switching Lever offers excellent mechanical durability and resistance to wear. Its robust construction allows it to withstand repeated switching cycles, vibration, and operational stress inside the transformer tank. The corrosion-resistant surface treatment protects the lever from oil, moisture, and temperature variations, ensuring long-term reliability.
The switching lever is designed to provide smooth and balanced motion with minimal friction.
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Motor drive spares
Tap position operating assembly
Tap Position Operating Assembly – Product Description
The Tap Position Operating Assembly is a mechanical component used in on-load tap changer systems to control and indicate the transformer tap position accurately. It ensures smooth transmission of motion from the drive mechanism to the tap selector, enabling precise voltage regulation during operation. This assembly plays a crucial role in maintaining stable transformer performance under varying load conditions.
Manufactured from high-strength metal with precision machining, the assembly offers reliable mechanical movement, proper alignment, and long operational life. Its robust design minimizes wear, ensures consistent positioning, and supports safe and efficient tap changing in demanding industrial environments.
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