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I know, if the solution were that easy I wouldn't be asking for one on here. We have many modern fault simulators in our arsenal however none of them are able to supply voltages at frequencies that are below 40Hz. The relay I am testing requires frequencies from around 5Hz to 60Hz.

I'm looking for sources that explain the theory, applications and typical test methods of numerous types of protective relaying such as line protection, bus protection, transformer protection, breaker-failure protection, generator protection and system stability special protections. I am also...

I'm looking for a Variable Frequency / Variable Voltage Power Supply to test an old electromechanical relay used in a generator protection scheme. The relay requires voltages between 0-69VAC at 0-60Hz. Since the relay is an old solenoid type electromechanical relay has a large coil and armature...

Thanks for all the prompt responses guys. Keep up the good work. PnC Rules. Protective Relaying runs the electrical work. I will enjoy having many informative discussions with you guys and girls in the near future. By the way how many female Power Engineers do we have on this forum?

Anyone here know of any great protective relaying forums or informative sites. Also, are there any Protective Relaying Engineers or Techs on here. Wouldn`t mind starting a Protective Relaying forum if there isn`t alreay one. Would be a great resource for fellow Protective Relaying professionals...

I am a Protection & Control Techologist at a major Power Utility in Ontario, Canada. As my title implys, I am not an engineer but instead an Electrical Techologist (three year Community College Program in Ontario, Canada). I perform daily maintenance and commissioning of new and existing Power...