Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
  • H01H9/548—Electromechanical and static switch connected in series
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
  • H01H85/02—Details
  • H01H85/0241—Structural association of a fuse and another component or apparatus
  • H01H2085/0283—Structural association with a semiconductor device
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/02—Details
  • H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
  • H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle for interrupting DC
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H45/00—Details of relays
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
  • H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former

Definitions

• Switchgears are commonly used for controlling and switching on or off electrical circuits in electrical power systems.
• Examples of switchgear devices may include electromechanical switches/relays, fuses, circuit breakers, isolators, current and potential transformers, etc.
• the JFET device includes a P-channel JFET.
• FIG. 1A illustrates a high-voltage electromechanical switching protection system including an n-channel junction field effect transistor (JFET), according to some embodiments of the present disclosure.
• JFET junction field effect transistor
• the voltage drop Vsw across the electromechanical switchgear 102 is substantially zero, which causes the JFET device 104 to be activated (e.g., turned ON) because the gate-source voltage VGS is at about 0 V.
• the JFET device 104 may be represented with a small on-resistance RON.
• the on- resistance RON of the JFET device 104 may be about 7 mQ to about 10 mQ.
• the gate of the JFET device 104 is at a lower voltage than the source, causing the JFET to be deactivated and in a high-impedance state (e.g., turned OFF) and maintaining the low voltage across the switch gear terminals equal to VGSOFF.
• a high-impedance state e.g., turned OFF
• a low voltage coil e.g., a 28 V coil

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• Semiconductor Integrated Circuits (AREA)

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Publications (1)

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• 2021
  • 2021-01-27 EP EP21706790.9A patent/EP4285397A1/de active Pending
  • 2021-01-27 WO PCT/US2021/015281 patent/WO2022164427A1/en not_active Ceased

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