Inventor

DUPRAZ JEAN-PIERRE

FR35 patents

⚠️ This page may combine multiple inventors who share the name “DUPRAZ JEAN-PIERRE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DUPRAZ JEAN-PIERRE

ALSTHOM GEC

System for measuring phase currents in a 3-phase installation

Optical apparatus for measuring current in a grounded metal-clad installation

Arc-detecting circuit breaker

Device for detecting superconductor quenching and application to a superconducting current limiter

Hybrid current limiter having superconductor windings

Capacitive sensor for a circuit for measuring the potential of a line conductor in a metalclad station

Feedback system control device and applications in amplifiers and servomechanisms

Safety device for electrical apparatus containing a dielectric gas, in particular circuit breakers or voltage-droppers for measurement purposes

Circuit for measuring voltages in a three-phase installation, in particular an installation of the metalclad type

ALSTOM TECHNOLOGY LTD

Circuit interruption device

Mechatronic circuit breaker device and associated tripping method and use thereof in interrupting a high direct current

Electromagnetic actuator comprising permanent magnets and mechanical load interrupter actuated by such an actuator

Method and device for regulating the supply of a photovoltaic converter

Method of opening a bypass switch of a high voltage direct current network

Spring control device for a circuit breaker

GEC ALSTHOM T & D SA

Rogowski coil

Method and a system for determining the density of an insulating gas in an electrical apparatus

Capacitor having high stability with temperature

Method of determining with great accuracy the rate of leakage from the case of an electrical apparatus

AREVA T & D SA

Current transformer with rogowski type windings, comprising an association of partial circuits forming a complete circuit

Method for determining the moment of closure of a circuit breaker on a high voltage line

Highly temperature-stable capacitor for taking measurements on a high-voltage line

Device for controlling an electric power cutoff device

ALSTHOM

Sagnac type optical fiber interferometer system

Method of updating the scale factor of apparatus for measuring an alternating electric current by means of the faraday effect

ALSTOM

Method and system of non-intrusively monitoring the mixture ratio of a gas mixture having at least two components

Capacitor with high thermal stability for shielded electrical lines

ALSTHOM ATLANTIQUE

Discharge circuit for rapidly eliminating charge trapped in a capacitor voltage divider used for monitoring high voltage AC

Supply circuit for electronic apparatus at a high electric potential

GENERAL ELECTRIC TECHNOLOGY GMBH

DC circuit breaker with counter current generation

Mechatronic circuit-breaker device

BERARD DAVID

Switchgear for a vacuum circuit breaker comprising locking means

Electrical equipment comprising a mobile part having improved dynamics

TOUR AREVA

Control device for controlling electrical switchgear

DUPRAZ JEAN-PIERRE

Apparatus for controlling electrical switchgear