JPS6074901A - Special high voltage protector of ac electric railcar - Google Patents

Abstract

PURPOSE:To efficiently construct a special high voltage protector of an AC electric railcar within a weight limit between limited device installations of the railcar by integrating a breaker with a surge absorber, thereby reducing the weight and a space. CONSTITUTION:A breaker 22 is covered with an insulator which contains a breaking switch 21, and a surge absorber 32 is covered with an insulator which contains a surge absorbing element 31. Supporting insulators 23, 24 insulate and support the breaker 22 or contains an operating mechanism of the switch 21. A breaking controller 25 electrically and mechanically controls the breaker 22. A lead terminal 27 is connected with a main transformer of a vehicle, and a lead terminal 26 is commonly used for the absorber 32 and the breaker 22, and connected with a pantograph of a railcar. An earth lead terminal 28 becomes an earth lead terminal of the absorber 32. The terminal 27, the breaker 22 the terminal 26, the absorber 32 and an earth lead terminal 28 are connected electrically and mechanically in series.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an integrated structure of a circuit breaker section and a surge absorber (surge arrester) section, which is an extra-high voltage protection system for a cross-current electric vehicle.

[Technical background of the invention and its problems]

Figure 1(a) shows the main circuit of the extra high voltage section of an AC electric vehicle.

(shown in bl.

Vehicle equipment is connected to the overhead wire with a vacuum circuit breaker (Vaccum circuit break).
er) 2 is a surge absorber (
Arrester) 3 discharges the abnormal high voltage current to the ground when an abnormal high voltage current occurs in the extra high voltage circuit before circuit breaker 2, and connects it to the main transformer (Main transformer).
r) Vehicle equipment of 4 or later is protected.

In conventional double-flow electric cars, there are two cut-off parts depending on the capacity of the vehicle, etc.
Although there are separate devices, as shown in FIG. 2 (ai, (bl), these circuit breakers 2 and surge absorbers 3 are each configured as independent devices, and are installed on the roof of the vehicle.

They are installed in the equipment room or under the floor, and for these installations, insulators are installed to maintain sufficient insulation distance between these extra-high voltage charging parts and the vehicle (which is added) to be installed.
, 24 , and 32 (here, η is the interrupting part, 23 is the supporting insulating part, 24 is also the supporting insulating part, and 32 is the surge absorbing part) to take a clear surface distance to the grounding part.

It is necessary to maintain an absolute spatial distance of 5 from the grounding part.

In addition, 21 is a cutoff opening/closing part, 25 is a cutoff control part, 26 is a -P terminal for the main transformer, 27 is a lead terminal for a pantograph, 31 is a surge absorption element, 32 is a surge absorption part, 33
is the IJ-t'l'lA connector for the main transformer.

As described above, the conventional devices have the drawbacks that the installation space including the insulation distance becomes large when each device itself and the device is installed in a vehicle, and the cost also increases.

[Purpose of the invention]

Here, the present invention overcomes the drawbacks of conventional devices and provides the first
Circuit breaker 2 shown in Figures (a) and (b). Surge absorber 3
Fig. 2(a) focuses on the points of the same potential between .

(b) Conventional circuit breaker 2 and conventional surge absorber 30
An extra-high voltage protection device for AC electric vehicles that is integrally joined at the potential part and significantly reduces the weight and space compared to the two independent equipment configurations, and is efficiently configured within the vehicle's limited equipment installation space and weight constraints. Its purpose is to provide.

[Summary of the invention]

The present invention provides a circuit breaker that cuts off the circuit to protect the entire vehicle's equipment when an abnormal current flows in the extra-high voltage circuit of the vehicle, and a circuit breaker for protecting the entire vehicle's equipment from abnormal high voltage currents such as those caused by lightning strikes. This is an extra-high-voltage protection device for AC electric vehicles that has an integrated structure with a surge absorption section that discharges abnormally high-voltage current to the ground.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 3(a) and 3(b) are configuration diagrams of an embodiment of the present invention.

The interrupting part η is covered with an insulating material containing a built-in interrupting opening/closing part 2],
The surge absorbing section 32 is covered with an insulator containing the surge absorbing element 31. The supporting insulating parts 23 and 24 insulate and support the interrupting part 4 or incorporate the operating mechanism of the interrupting opening/closing part 21. The cutoff control section performs electrical and mechanical control of the cutoff section, the lead terminal section connects to the main transformer 4 of the vehicle, and the lead terminal 26 connects the surge absorbing section 32 and the cutoff section 22 to the vehicle. The earth lead terminal U is a supporting metal body which also serves as the earth lead terminal of the surge absorbing section 32.

・IJ-r terminal part for Zonk graph, cut-off part n, for main transformer-)' Zuiko 26. Surge absorption section 32. Earthly~
The terminals 28 are electrically and mechanically connected in series (series circuit).

Next, the present invention will be explained in detail. Surge absorber of the present invention
In the circuit breaker, when an abnormal current flows in the series circuit, the circuit breaker n quickly interrupts the circuit, and the circuit breaker 22
When an abnormal high voltage current occurs previously, the surge absorber 32 immediately discharges the high voltage current to the ground to protect subsequent vehicle equipment.

As described above, protection against abnormal currents and abnormal high voltage currents in extra high voltage circuits can be achieved with one device configuration without requiring a large installation space.

The configuration diagram of another embodiment of the present invention is shown in FIG. 4(a), (1
)).

In the integrated configuration of the interrupting section n and the surge absorbing section, as shown in the figure, the interrupting opening/closing section 21 and the surge absorbing element 31 are connected in series and covered with an insulating material, and the -P terminal section is exposed between them. This means includes a surge absorber-equipped cutoff section 29.

Furthermore, depending on the magnitude of the discharge current, etc., it may be possible to install the terminal between the terminal and the three lead terminal of the surge absorber separately from the support metal of the surge absorber.

〔Effect of the invention〕

Thus, according to the present invention, the second effect can be obtained, which is of great industrial use.

■ By integrating the interrupting part and the surge absorbing part, the insulation distance from the extra-high voltage pressurizing part can be reduced, and the installation space can be reduced.

■ By integrating these extra high voltage protection equipment.

The size and weight of the product are significantly reduced.

■ Integration reduces the number of connection points for extra-high pressure parts of vehicles, improves reliability as a protection system, and reduces maintenance.

[Brief explanation of the drawing]

Figure 1 (a+, (b) is a special high-speed circuit diagram of a cross-flow electric car,
Figures 2 (a) and (b) are block diagrams of a conventional circuit breaker and surge absorber, Figures 3 (a) and (b) are block diagrams of an embodiment of the present invention, and Figure 4 (a). , (b) is a configuration diagram of another embodiment of the present invention. l...A antagraph, 2...breaker, 3...surge absorber, 4...main transformer, 5...space insulation distance (
curve). 21... Cutoff opening/closing part, 22... Cutoff part, 23.2
4... Support insulating section, 5... Cutoff control section, 26...
Lead terminal for main transformer, 27... -r terminal for nozzle tag, 28... Earth lead terminal, 29... Surge absorber cutoff section, 3]... Surge absorber resistor, 32...
...Surge absorption part, 33...Lead terminal for main transformer. Applicant's agent Kiyoshi Inomata 51 Figure (0) (b) Re3 Flash (b) b4 Figure (b)

Claims (1)

[Scope of Claims] 1. A circuit breaker section that interrupts the circuit to protect the equipment of the entire vehicle when an abnormal current flows in the extra high voltage circuit of the vehicle, and a circuit breaker section that interrupts the circuit to protect the equipment of the entire vehicle when an abnormal current flows in the extra high voltage circuit of the vehicle, and An extra high voltage protection device for an AC electric vehicle, characterized by having an integrated structure with a surge absorber section that discharges abnormally high voltage current to the ground in order to protect equipment. 2 Load side side of circuit breaker section and power supply of surge absorption section ft1Q
The extra-high voltage protection girder for an AC electric vehicle as claimed in claim 1, wherein the side surfaces are adhesively fixed and the circuit breaker section and the voltage absorption section are supported via one support insulating section.