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Illustrates the WIP1 relay's connection diagram, showing terminals for current inputs, outputs, and control signals.
Details how CTs provide supply energy and measurement values, including filtering and A/D conversion.
Outlines the critical requirements for main current transformers (CTs) to ensure proper relay operation.
Covers essential protection settings including pickup values, time characteristics, and trip delays.
Details the procedures for performing a secondary injection test, including required equipment and setup.
Lists essential test equipment: amperemeter, voltage supply, inductance, timer, switching device, and leads.
Presents a simple single-phase test circuit diagram for energizing the WIP1 relay during testing.
Explains testing of tripping circuits: electro pulse output, alarm relay, and flag indicators.
Explains testing the overcurrent element's operating time by injecting current and using a timer.
Describes checking the high set element, noting potential trip delay impact with inverse time characteristics.
Discusses primary injection testing, its challenges, and how WIP1 can be tested similarly for accuracy.
Details the setting ranges and steps for phase current and earth current elements, including tolerances.
Defines the mathematical formulas for various inverse time tripping characteristics according to IEC 255-4.
Presents graphical curves for x^4 tripping characteristics and an overcurrent setting example.
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