Abstract: An emulator system for testing an electrical product in a closed circuit, including a first power electronic structure to emulate a voltage source, connectable to the input of the electrical product; a second power electronic structure to emulate an electronic load, connectable to the output of the electrical product; a direct current bus connected between the first and second structure; a power supply configured to be connected to a general electrical grid and power the bus; and a control module in communication with all elements of the system. Once the electrical product is connected between the emulated source and load, a closed circuit is established in which the emulated source consumes power from the bus to test the product and the emulated electronic load reinjects the power consumed into the bus.

Abstract: The present invention relates to a system for monitoring the electric network voltage waveform, comprising: switching means (11) connected to the voltage lines (A, B, C) of a three-phase system, comprising two thyristors (T1, T2) connected to two of the voltage lines (A, B, C) and at least two capacitors (C1, C2) connected to said thyristors (T1, T2), said means (11) being configured to open and close said thyristors (T1, T2) in response to a trigger signal; means for measuring (12) the voltages in said voltage lines and at the input of said capacitors; a thyristor trigger circuit (14) for providing a trigger signal to either thyristor (DT1, DT2) when the voltage in the terminals of said thyristor (T1, T2) crosses zero; control means (13, 23) for giving said trigger order (OD) or not.

Abstract: The present invention relates to a system for monitoring the electric network voltage waveform, comprising: switching means (11) connected to the voltage lines (A, B, C) of a three-phase system, comprising two thyristors (T1, T2) connected to two of the voltage lines (A, B, C) and at least two capacitors (C1, C2) connected to said thyristors (T1, T2), said means (11) being configured to open and close said thyristors (T1, T2) in response to a trigger signal; means for measuring (12) the voltages in said voltage lines and at the input of said capacitors; a thyristor trigger circuit (14) for providing a trigger signal to either thyristor (DT1, DT2) when the voltage in the terminals of said thyristor (T1, T2) crosses zero; control means (13, 23) for giving said trigger order (OD) or not.