Class 218/122 - Pressure monitoring means

Subclass of Class 218 - High-voltage switches with arc preventing or extinguishing devices
Definition: Subject matter including means having a vacuum pressure
No. of patents: 21
Last issue date: 07/08/2008

Number	Title	Issue Date
7397012	High current switch and method of operation An electrical switch which includes an insulative housing having a wall defining an axial bore therein, a first electrical contact disposed in the housing bore and a second electrical contact movably disposed in the housing bore between an open position and a closed...	07/08/2008
7253630	Electro-optical voltage sensor circuit monitoring leakage or loss of vacuum of a vacuum interrupter and vacuum circuit interrupter including the same A vacuum circuit breaker includes a line terminal, a load terminal and a vacuum interrupter having a vacuum envelope containing a fixed contact assembly and a moveable contact assembly moveable between closed and open circuit positions. The fixed contact assembly is...	08/07/2007
7223932	Vacuum Switchgear Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer contain...	05/29/2007
7148677	Vacuum circuit interrupter including circuit monitoring leakage or loss of vacuum and method of monitoring a vacuum interrupter for leakage or loss of vacuum A method monitors a vacuum interrupter for leakage or loss of vacuum. The vacuum interrupter includes a line side, a load side and separable contacts electrically connected therebetween. The line side has a line side voltage and the load side has a load side voltage...	12/12/2006
7135652	Vacuum switchgear Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer contain...	11/14/2006
7098667	Cold cathode ion gauge A cold cathode ion gauge is provided that is suitable for use in a high vacuum and in the presence of contaminating gases. By decreasing the discharge current and, more precisely, decreasing the charge current density received by the gauge electrodes, and using cert...	08/29/2006
6529009	Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with...	03/04/2003
6426627	Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with...	07/30/2002
6153846	Vacuum insulated switching apparatus A vacuum switch 1 includes a grounded vacuum vessel 2. The reliability of monitoring and measuring the vacuum pressure is improved by providing a vacuum pressure measuring terminal 30 at a side plane of the vacuum vessel 2 such that a main circuit 13 and ...	11/28/2000
5537858	System for the nonintrusive monitoring of electrical circuit breaker vessel pressure A sensitive to a change in the physical dimension(s) of the exterior surface of a pressure vessel transducer and attached to the exterior surface thereof the pressure vessel may be a vacuum chamber. The transducer measures exterior dimension change, repre...	07/23/1996
4937698	System for foreseeing deterioration in interrupting performance of vacuum interrupter A system for foreseeing deterioration in interrupting a performance of a vacuum interrupter, including a first measuring component for measuring potentials of electric lines connected to fixed and movable electrodes of the vacuum interrupter; a second mea...	06/26/1990
4672323	Device for measuring the internal pressure of an operationally built built-in vacuum switch A device for measuring the internal pressure of an operationally built-in vacuum switch which comprises a vacuum switching tube having a switching chamber and switch contacts as well as an associated drive for the contacts. For the measurement of the pres...	06/09/1987
4491704	Vacuum circuit interrupter having vacuum monitoring apparatus There is provided by this invention a vacuum monitoring device for use in vacuum circuit interrupters comprising a stacked resistor assembly as a voltage divider coupled to an internal shield of the vacuum bottle and a low voltage detection circuit for mo...	01/01/1985
4440995	Vacuum circuit interrupter with on-line vacuum monitoring apparatus A vacuum circuit interrupter is taught which utilizes the vapor deposition shields thereof and the existing high voltage electrical source or network which is controlled by the circuit interrupter to produce a cold cathode detector for determining the qua...	04/03/1984
4403124	Vacuum circuit interrupter with insulated vacuum monitor resistor A vacuum circuit interrupter as taught which utilizes the vapor deposition shields thereof in the existing high voltage source or network which is controlled by the circuit interrupter to produce a cold cathode ion detector for determining the quality or ...	09/06/1983
4351992	High-potential testing of vacuum-type circuit interrupters This method assures that when a vacuum interrupter having its interior at atmospheric pressure is tested by a high potential applied across its contacts, a spark-over will occur internally of the interrupter even though the high potential used has a lower...	09/28/1982
4163130	Vacuum interrupter with pressure monitoring means A vacuum interrupter with pressure monitoring means wherein a pair of separable electrodes are arranged within a highly evacuated envelope and are connected to a high voltage circuit provided with a vacuum pressure detector element which has a pair of det...	07/31/1979
4103291	Leak sensor and indicating system for vacuum circuit interrupters A leak sensor powered directly by the circuit voltage being controlled by the vacuum circuit interrupter and continuously operating while the interrupter is in service. An indicating system is connected to the leak sensor, or sensors, and provides an indi...	07/25/1978
4096366	Means for detecting a loss of vacuum in vacuum-type circuit interrupters used in polyphase a.c. vacuum circuit breaker This loss-of-vacuum detecting means for a vacuum circuit breaker utilizes input information derived from the current transformers of the overcurrent-sensing means typically present in medium voltage switchgear. In this overcurrent-sensing means, the curre...	06/20/1978
4034264	Arrangement for detecting a deficient operational capability of a vacuum switching vessel The invention is directed to an arrangement for detecting deficient operational capability in a vacuum switching vessel. The arrangement can provide a signal if a fault occurs which affects the operability of the switching vessel. Instead of a signal, a p...	07/05/1977
3983345	Method of detecting a leak in any one of the vacuum interrupters of a high voltage circuit breaker Discloses a method of detecting a leak in any one of the vacuum-type circuit interrupters of a high voltage vacuum circuit breaker comprising a plurality of normally series-connected interrupters located within a tank of the circuit breaker containing pre...	09/28/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 218/122 - Pressure monitoring means