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Download OurĀ Mho Element Plotter Spreadsheet for SEL-421 Relays

Online Courses

Continue learning about power engineering and power system protection and control with our online courses. Sign up to one of our subscriptions to get access to all courses!

Subscription (Annual)

Save 20% over the monthly subscription and enjoy access to all courses offered by Romero Engineering Co. with this annual subscription.

$468.00 USD every year

Subscription (Monthly)

Enjoy access to all courses offered by Romero Engineering Co. with this monthly subscription.

$49.00 USD every month

Protection and Control Training

Learn about specific protection and control topics with this customized one-hour one-on-one virtual training session with Ricardo Romero, PE.

$199.00 USD

Power System Analysis Course

Learn about power systems with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$199.00 USD

Power System Protection: Protective Relay Logic Course

Learn about digital logic in protective relays with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$149.00 USD

Power System Protection: Busbar Protection Course

Learn about bus differential protection with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$149.00 USD

Power System Protection: Transformer Protection Course

Learn about power transformer protection with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$149.00 USD

Symmetrical Components for Power System Protection Engineers Course

Learn about symmetrical components and power system protection with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$149.00 USD

MATLAB/Simulink for Power System Simulations Course

Learn about power system software simulations with this one-time purchase. You'll have lifetime access to this course on desktop and mobile devices upon purchase.

$149.00 USD