The present disclosure discloses a vacuum degree detection device, a monitoring system and a vacuum arc-extinguishing chamber thereof, wherein, in the vacuum degree detection device, a ceramic insulating housing is sealingly fixed to an end face cover plate of the vacuum arc-extinguishing chamber, the ceramic insulating housing is a circular ring-shaped structure coaxial with a conductive rod on the end face cover plate, a sealing area formed by the end face cover plate and the ceramic insulating housing is provided with a through hole communicating with the vacuum arc-extinguishing chamber; a thermoelectric vacuum sensor is disposed inside the ceramic insulating housing to detect the vacuum degree of the vacuum arc-extinguishing chamber, a cold end is fixed to the end face cover plate, an electrode is supported on the cold end, a thermoelectric arm is supported on the electrode, a hot end is laminated to the thermoelectric arm.

The present disclosure discloses a vacuum degree detection device, a monitoring system and a vacuum arc-extinguishing chamber thereof, wherein, in the vacuum degree detection device, a ceramic insulating housing is sealingly fixed to an end face cover plate of the vacuum arc-extinguishing chamber, the ceramic insulating housing is a circular ring-shaped structure coaxial with a conductive rod on the end face cover plate, a sealing area formed by the end face cover plate and the ceramic insulating housing is provided with a through hole communicating with the vacuum arc-extinguishing chamber; a thermoelectric vacuum sensor is disposed inside the ceramic insulating housing to detect the vacuum degree of the vacuum arc-extinguishing chamber, a cold end is fixed to the end face cover plate, an electrode is supported on the cold end, a thermoelectric arm is supported on the electrode, a hot end is laminated to the thermoelectric arm.

A switch assembly including a switch and a high impedance element used for energy harvesting purposes that are connected to a power line and assembly electronics. The high impedance element has higher impedance than the switch so that current flows through the switch from the power line when the switch is closed and through the high impedance element from the power line when the switch is open. The switch assembly also includes a current sensing device, such as a current sensing resistor, electrically coupled in series with the high impedance element and the electronics. By measuring the current flow using the current sensing device, it is possible to infer the voltage across the high impedance element since its impedance is known. This voltage can be used to provide point on wave closing of the switch and to determine the line voltage magnitude.

To provide a vacuum valve pressure diagnosis device for an opening/closing device equipped with a vacuum valve, the diagnosis device which permits downsizing of the vacuum valve and achieves enhanced safety and reliability. Accordingly, the vacuum valve pressure monitoring device is disposed in a vacuum breaker including: a main circuit opening/closing part including the vacuum valve and an insulating frame covering the vacuum valve; and an operation mechanism part for opening/closing a contact of the vacuum valve. The pressure monitoring device for vacuum valve includes: a first electrode disposed on one side surface of the insulating frame and grounded via an impedance; a second electrode disposed on another side surface of the insulating frame and grounded via a switch; and a potential measuring device connected in between the impedance and the first electrode.

To provide a vacuum valve pressure diagnosis device for an opening/closing device equipped with a vacuum valve, the diagnosis device which permits downsizing of the vacuum valve and achieves enhanced safety and reliability. Accordingly, the vacuum valve pressure monitoring device is disposed in a vacuum breaker including: a main circuit opening/closing part including the vacuum valve and an insulating frame covering the vacuum valve; and an operation mechanism part for opening/closing a contact of the vacuum valve. The pressure monitoring device for vacuum valve includes: a first electrode disposed on one side surface of the insulating frame and grounded via an impedance; a second electrode disposed on another side surface of the insulating frame and grounded via a switch; and a potential measuring device connected in between the impedance and the first electrode.

Disclosed is a condition assessment method for an outdoor post-mounted vacuum switch. The method includes: establishing a condition assessment mathematical model for the post-mounted vacuum switch and acquiring scores of condition indicators of the post-mounted vacuum switch; and acquiring a condition assessment score based on the condition assessment mathematical model of the post-mounted vacuum switch and according to the scores of the condition indicators of the post-mounted vacuum switch so as to realize on-line monitoring of a health condition of the post-mounted vacuum switch and assess the health condition of the post-mounted vacuum switch. Further disclosed is a condition assessment device for the outdoor post-mounted vacuum switch.

To provide a vacuum valve pressure diagnosis device for an opening/closing device equipped with a vacuum valve, the diagnosis device which permits downsizing of the vacuum valve and achieves enhanced safety and reliability. Accordingly, the vacuum valve pressure monitoring device is disposed in a vacuum breaker including: a main circuit opening/closing part including the vacuum valve and an insulating frame covering the vacuum valve; and an operation mechanism part for opening/closing a contact of the vacuum valve. The pressure monitoring device for vacuum valve includes: a first electrode disposed on one side surface of the insulating frame and grounded via an impedance; a second electrode disposed on another side surface of the insulating frame and grounded via a switch; and a potential measuring device connected in between the impedance and the first electrode.

To provide a vacuum valve pressure diagnosis device for an opening/closing device equipped with a vacuum valve, the diagnosis device which permits downsizing of the vacuum valve and achieves enhanced safety and reliability. Accordingly, the vacuum valve pressure monitoring device is disposed in a vacuum breaker including: a main circuit opening/closing part including the vacuum valve and an insulating frame covering the vacuum valve; and an operation mechanism part for opening/closing a contact of the vacuum valve. The pressure monitoring device for vacuum valve includes: a first electrode disposed on one side surface of the insulating frame and grounded via an impedance; a second electrode disposed on another side surface of the insulating frame and grounded via a switch; and a potential measuring device connected in between the impedance and the first electrode.

A method for detecting a vacuum leak in a vacuum interrupter-based switching device. The method monitors current conduction across the contacts when they are open after a predetermined delay. The method detects current conduction across the contacts and adds a current conduction timer unit that accumulates current conduction time to an accumulated total current conduction time value if a magnitude of the detected current conduction exceeds a predetermined current value. The method reduces the accumulated total current conduction time value a certain variable or constant percentage of a predetermined timer value over a settable reset time if current conduction is not detected, and provides an indication if the accumulated total current conduction time value exceeds a predetermined current conduction time threshold.

A method for detecting a vacuum leak in a vacuum interrupter-based switching device. The method monitors current conduction across the contacts when they are open after a predetermined delay. The method detects current conduction across the contacts and adds a current conduction timer unit that accumulates current conduction time to an accumulated total current conduction time value if a magnitude of the detected current conduction exceeds a predetermined current value. The method reduces the accumulated total current conduction time value a certain variable or constant percentage of a predetermined timer value over a settable reset time if current conduction is not detected, and provides an indication if the accumulated total current conduction time value exceeds a predetermined current conduction time threshold.