VACUUM INSULATED SWITCHGEAR

Abstract

A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional side view of a vacuum insulated switchgear applied to a feeder panel.

FIG.2 is a cross sectional front view of the vacuum insulated switchgear shown in FIG. 1, applied to the feeder panel.

FIG. 3 is a cross sectional perspective view of the vacuum insulated switchgear shown in FIG. 1, applied to the feeder panel.

FIG. 4 is an electric circuit of the vacuum insulated switchgear shown in FIG. 1, applied to the feeder panel.

FIG. 5 is a vertical cross sectional view of a switch for the vacuum insulated switchgear shown in FIG. 1.

FIG. 6 is an enlarged perspective view of the switch for the vacuum insulated switchgear shown in FIG. 1.

FIG. 7 is a cross sectional side view of a vacuum insulated switchgear of another embodiment applied to the feeder panel.

FIG. 8 is an electric circuit of the vacuum insulated switchgear shown in FIG. 7, applied to the feeder panel.

FIG. 9 is a cross sectional side view of a vacuum insulated switchgear of another embodiment, applied to a feeder panel.

FIG. 10 is a cross sectional side view of a vacuum insulated switchgear of another embodiment, applied to a feeder panel.

FIG. 11 is a cross sectional side view of a vacuum insulated switchgear of another embodiment, applied to a feeder meter panel.

FIG. 12 is an electric circuit of the vacuum insulated switchgear shown in FIG. 11, applied to the feeder meter panel.

FIG. 13 is a cross sectional side view of a vacuum insulated switchgear of another embodiment, applied to a feeder meter panel.

FIG. 14 is a cross sectional side view of a bus-bar separation unit that uses a vacuum insulated switchgear of the present invention, applied to building up of the feeder panel or a feeder meter panel.

FIG. 15 is a cross sectional front view of a bus-bar separation unit that uses a vacuum insulated switchgear of the present invention, applied to building up of the feeder panel or feeder meter panel.

FIG. 16 is an electric circuit of a bus-bar separation unit that uses a vacuum insulated switchgear of the present invention shown in FIG. 14, applied to building up of the feeder panel or feeder meter panel.

Claims

1. A vacuum insulated switchgear comprising: a metal case having a switch section, a bus-bar section and a cable section, each being portioned by an earthed metal plate;a vacuum double break switch having breaking and disconnecting function, which switch is disposed in the switch section of the case;an operator for opening and closing the vacuum double break switch;a bus-bar disposed in the bus-bar section; anda terminal introduced into the cable section, which is located at the rear end of the case to be connected to the cable in the cable section, one end of which is connected to the switch and the other end is connected to the cable in the cable section, wherein the cable is connected with the terminal so as to be withdrawn upwardly or downwardly without changing the position of the switch.

2. A vacuum insulated switchgear comprising: a metal case having a switch section, a bus-bar section and a cable section, each being portioned by an earthed metal plate;a vacuum double break switch having breaking and disconnecting function, which switch is disposed in the switch section of the case;an operator for opening and closing the vacuum double break switch;a bus-bar disposed in the bus-bar section; anda terminal introduced into the cable section, one end of which is connected to the switch and the other end is connected to the cable in the cable section, the cable being located at the rear end of the case to be connected to the cable in the cable section, and a transformer for measuring, connected to the terminal in the cable section by means of a fuse wherein the transformer is disposed below the bus-bar section of the case.

3. A vacuum insulated switchgear comprising: a case having a switch section, a bus-bar section partitioned from the switch section by an earthed metal plate and a cable section;a vacuum double break switch disposed in the switch section of the case, having breaking and disconnecting function;an operator for operating the switch;a bus-bar disposed in the bus-bar section;a terminal one end of which is connected to the switch and the other end is introduced into a position located in a rear end of the case and connected to the cable in the cable section; anda low voltage control section disposed below a front end of the case.

4. The vacuum insulated switchgear according to claim 1, wherein the terminal is connected to one of fixed contacts of the vacuum double break switch and the bus-bar is connected to the other fied contact of the vacuum double break switch.

5. The vacuum insulated switchgear according to claim 1, which further comprises a vacuum earthing switch connected to one of the fixed contacts of the vacuum double break switch and an operator for operating the vacuum earthing switch.

6. The vacuum insulated switchgear according to claim 1, which further comprises a transformer for protecting a power transmission system, disposed between the switch section and the cable section and arranged at an outer periphery of the terminal.

7. The vacuum insulated switchgear according to claim 2, the cable is introduced from upward or downward of the cable section and connected to terminal.

8. The vacuum insulated switchgear according to claim 1, wherein the bus-bar is connected to a vacuum double disconnector having a disconnecting function.

9. A vacuum insulated switchgear comprising: a case having a bus-bar section located in the center of the case, a switch section located above the bus-bar section, a cable section located at a rear end of the case, and a vacuum double break switch section having a low voltage control section, located below a front end of the case;a switch of a double break switch of three position type, disposed in the switch section, having a breaking and disconnecting function;an electromagnetic driving operator for operating the switch;a vacuum insulated earthing switch disposed in the switch section, which is connected to one end of the fixed contacts of the vacuum insulated double break switch of three position type;an electromagnetic operator for driving the vacuum insulated earthing switch;a terminal for connecting the cable introduced into the cable section located at the rear end of the case by means of a current transformer for a network protection and connected to the other fixed contact of the vacuum double break switch of three position type;a T-form cable head disposed to the terminal and selectively connected to the cable in the cable section introduced upwardly or downwardly from the case; anda condenser for the electromagnetic driving operator disposed in the low voltage control section of the case.

10. The vacuum insulated switchgear according to claim 9, which further comprises a transformer, disposed at a lower part of the bus-bar section of the case and connected to the terminal for connecting the cable in the cable section, for measuring.