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  • Testing the SEL 311C Ground Distance Quadrilateral Element

    Testing the SEL 311C Ground Distance Quadrilateral Element

    Introduction These instructions will allow the user to calculate the shape of the SEL 311C ground quadrilateral element and easily determine test points. The tester will need to be able to do vector math (addition, multiplication and division) and basic trigonometry (Sin, Cos and Tan). It is recommend that the tester either purchase a calculator
  • What are “Productivity Modes” in the MTS-5100?

    Short Answer A “Productivity Mode” is a helper mode in the MTS-5100 Protective Relay Testing System for testing a specific kind of relay, protection element or piece of substation equipment. For example, the ANSI 51 Time Overcurrent Relay Test Mode is optimized for testing time-overcurrent relays or the time-overcurrent elements in multi-function digital relays. Productivity

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