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Call us for any question

(+1)614-488-1151

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01

Generator Service or Field Support

Inspection, testing, troubleshooting, field service, and outage support for utility and industrial generator assets.

02

Replacement Coils or Rebuild Kits

Replacement Coils or Rebuild Kits High-voltage replacement coils and rebuild kit support backed by NEC manufacturing experience.

03

Stator or Rotor Rebuilds

Support for critical generator components where condition, timing, and repair decisions matter.

04

Planned Outage

Experience support when schedule, reliability, access, and repair scope need to be established before work begins.

05

Considering an OEM Alternative

Generator service, repair, and support options when OEM cost, timing, or responsiveness becomes a concern.

06

Not Sure Where to Start?

If the issue is elusive, use our ReliabilityNavigator™ to clarify the problem and assess available options.

HIGH VOLTAGE COILS

We make the world's best coils. Period.

Our coil manufacturing process is refined and validated by over a century of experience and refinement to yield a coil that is exceptionally resilient, predictable and reliable. It performs well in all electrical, mechanical categories, and withstands the most demanding environments.

NEC high-voltage winding manufacturing and testing capability

Manufacturing Capacity

Stator, rotor, exciter, and salient pole windings supported by process checks, testing, dimensional inspection, fit verification, and manufacturing depth.

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Turbogenerator rotor and exciter winding capability

Rotor & Exciter Windings

New and refurbished turbogenerator rotor and exciter windings, including copper or aluminum conductors, direct or indirect cooling, and repair-ready winding support.

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Salient pole winding and rotor refurbishment capability

Salient Pole Windings

Support for new and refurbished field pole windings, pole refurbishment, rotor repairs, re-qualification, uprate projects and hydrogenerator and turbine generator life-extension.

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High Voltage Coils & Bars

Our premier winding for your generator, NECCOBond-E & VPI coils and bars.

When long-term generator reliability is at issue, there is no substitute for the superior quality and performance of an individually vacuum pressure Impregnated coil or bar.

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NECCOFlex VPI diamond coils for small bore and tightly lapped generators

NECCOFlex Diamond Coils

VPI coil reliability for small-bore and tightly lapped machines.

NECCOFlex coils support form-wound stators where machine geometry, tight laps, or installation limits require end-turn flexibility without giving up VPI insulation performance.

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NEC resin rich coils and bars for generator and motor winding applications

Resin Rich Coils & Bars

Balancing cost and reliability for applicable generator and motor windings.

NEC manufactures NECCOPress resin-rich coils and bars for applications where winding life, reliability, installation requirements, and project cost must be balanced.

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01

Glen Canyon

Complete refurbishment of generators on site...

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02

Swift River

Complete refurbishment of generators on site...

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03

Connersville

Complete refurbishment of generators at NEC...

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5648
High Voltage Coils Manufactured / Year

We are proudly the largest manufacturer of high voltage coils and bars in the world. Let us share that passion with your installation.

174
Generator Installations Worldwide

Our high voltage coils, bars and exciter and legacy component rebuilds have been installed in over 174 installations in 19 countries.

Email: necservice@national-electric-coil.com
Support: (+1) 614-488-1151
We are the largest manufacturer of high voltage coils and windings in the world and can repair legacy and current generators. We engineer reliability and provide products & responsive service beyond the OEM.

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