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OLTC 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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OLTC 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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OLTC 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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OLTC 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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OLTC SparesFixed 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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OLTC 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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OLTC Spares
Transition resistance
NGEF Transition Resistance – Product Description
The NGEF Transition Resistance is a vital component used in On-Load Tap Changer (OLTC) systems of power and distribution transformers. It is designed to control and limit circulating current during tap-changing operations, ensuring smooth and safe voltage transition without interruption to the power supply. By temporarily introducing resistance into the circuit, it prevents short circuits, reduces electrical stress, and protects transformer components during switching.
Manufactured using high-quality resistance alloys and precision-engineered metal grids, the NGEF Transition Resistance offers excellent thermal stability and consistent electrical performance. Its robust construction allows efficient heat dissipation during operation, preventing overheating and maintaining stable resistance values. The insulated mounting structure ensures safe installation and reliable performance inside the transformer tank.
The transition resistance is built to withstand high electrical loads, frequent switching cycles, and harsh operating conditions such as heat, oil exposure, and vibration. Its maintenance-friendly design allows easy inspection, cleaning, and replacement, helping to reduce downtime and extend service life.
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OLTC 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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OLTC 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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