Abstract: A series PV arc fault detection method and apparatus demodulates a current signal provided by a DC power source to an inverter to eliminate a DC component and periodic noise. Autocorrelation coefficients are generated from the demodulated current signal to monitor noise energy and variation and, based on the noise energy, a determination is made if an arc fault has occurred.
Type:
Application
Filed:
April 19, 2023
Publication date:
December 14, 2023
Applicants:
MERSEN USA EP Corp., Northeastern University
Inventors:
Roy A. Ball, Jonathan C. Kim, Bradley M. Lehman
Abstract: Pink noise analysis, along with unique properties of the photovoltaic (PV) operating point of both the instantaneous current and voltage signal, is used to distinguish arc faults from other noisy loads or PV degradations.
Type:
Grant
Filed:
March 18, 2022
Date of Patent:
September 26, 2023
Assignees:
MERSEN USA EP CORP., Northeastern University
Inventors:
Roy A. Ball, Jonathan C. Kim, Bradley M. Lehman
Abstract: A fusible disconnect switch includes a switch housing, and a first fuse contact member and a second fuse contact member coupled to the switch housing, each of the first fuse contact member and the second fuse contact member configured to engage and complete an electrical connection through an overcurrent protection fuse. The fusible disconnect switch further includes a switch contact including a parallel contact configuration. An interlock is operatively coupled to the first fuse contact member and a switch that operates the switch contact, the interlock configured to inhibit movement of the switch from the OFF position to the ON position when the first fuse contact member is unsecured to the switch housing, and inhibit movement of the first fuse contact member relative to the switch housing when the switch is in the ON position.
Type:
Application
Filed:
July 2, 2021
Publication date:
August 3, 2023
Applicant:
MERSEN USA EP Corp.
Inventors:
Roy Ball, Brian A. Betts, Francesco A. Nania, Mathew Knapp, Tyler Larson
Abstract: A device and method for detecting a location of an arc event between a power bus and a coupler of an electric vehicle monitors an interface between the power bus and the coupler for the occurrence of an optical event. A determination is made if an arc event occurred based on the optical event, and upon determining the occurrence of an arc event at least one of a time the arc event occurred or a position of the electric vehicle at the time the arc event occurred is recorded.
Abstract: Pink noise analysis, along with unique properties of the photovoltaic (PV) operating point of both the instantaneous current and voltage signal, is used to distinguish arc faults from other noisy loads or PV degradations.
Type:
Application
Filed:
March 18, 2022
Publication date:
September 22, 2022
Applicants:
MERSEN USA EP CORP., Northeastern University
Abstract: A circuit arrangement for a surge protection device for protecting multiple DC or AC power lines. The circuit arrangement includes a plurality of DC or AC power line inputs, a negative potential or neutral input, a ground potential input, a surge protection component having one or more surge elements, a rectification circuit including a plurality of diodes, and an alarm circuit for receiving a status output from the surge protection component.
Abstract: An externally-controllable thermal tripping device comprising a voltage dependent resistor including a voltage dependent resistor chip; a thermal tripper including a tripping electrode; and a controllable heating element. The tripping electrode is connected to an electrode of the voltage dependent resistor chip through a meltable welding material, and the controllable heating element is controlled by an external control device to generate heat and transmit generated heat to a commissure of said welding material to melt said welding material and electrically disconnect the tripping electrode from the voltage dependent resistor chip.
Type:
Grant
Filed:
January 22, 2018
Date of Patent:
October 12, 2021
Assignees:
Shanghai ASP Lighting Protective Technology Co., Ltd., MERSEN USA EP Corp.
Abstract: An externally-controllable thermal tripping device comprising a voltage dependent resistor including a voltage dependent resistor chip; a thermal tripper including a tripping electrode; and a controllable heating element. The tripping electrode is connected to an electrode of the voltage dependent resistor chip through a meltable welding material, and the controllable heating element is controlled by an external control device to generate heat and transmit generated heat to a commissure of said welding material to melt said welding material and electrically disconnect the tripping electrode from the voltage dependent resistor chip.
Type:
Application
Filed:
January 22, 2018
Publication date:
December 24, 2020
Applicants:
Shanghai ASP Lighting Protective Technology Co., Ltd., MERSEN USA EP Corp.
Abstract: A circuit arrangement for a surge protection device for protecting multiple DC or AC power lines. The circuit arrangement includes a plurality of DC or AC power line inputs, a negative potential or neutral input, a ground potential input, a surge protection component having one or more surge elements, a rectification circuit including a plurality of diodes, and an alarm circuit for receiving a status output from the surge protection component.