JPS60121632A - Fine commutation type current limiter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention limits and cuts off short-circuit damage in the event of a short-circuit accident in the power system! 11I Regarding gap commutation current limiting device. Conventionally, the most common method for limiting and interrupting short-circuit current is to use a power fuse. This power fuse is widely used in applications ranging from low pressure to cylinder use, but cannot be used repeatedly. A no-fuse breaker (which can be used repeatedly)
NFB) exists, but its range of use is limited to low pressure areas. As a method that can be used repeatedly in the straight region, there is a method of commutation to a current limiting element as shown in FIG. 1, which is used for direct cap shutoff and the like. The principle is that if the commutation switch 101 and the disconnection switch 102 are in the closed state and an excess '+v flow occurs in a bad energization state, the commutation switch 101 will first become open, and the commutation switch 101 will be in the open state. , 1tot is followed by a limited yIV element 103 in parallel.
In order to do so, Mf leaks into the current limiting element, and the resistance of this limiting fATg element (or the accelerator) limits the current, and this current limiting action causes the telegram to become small. 1 force for 1 cell] The circuit is opened by breaking the circuit with the closing device 102.This method is limited as the diameter of the fuse at the output fuse becomes smaller. If the diameter of the fuse is increased in order to increase the flow rate and the flow rate, conversely, the limiting fN% property will decrease fJi. In this method, the following two points are applied to the transfer fAt portion to the current limiting element 103.
Two methods have been used by RIE America. ■ One part of the rolling element is a fuse, and the element γ is also a fuse. =<1 Set a current-carrying fuse to the commutation switch tot in Figure 1, set a current-limiting fuse and limit +5Ii1+J resistor to the current-limiting element 103, and force the trace element with an explosive as a -Ir11 storage fuse. (For example, Japanese Patent Laid-Open No. 55-95241). ■ The capping part is an opening/closing contact and the current limiting element is a limiting resistor or fuse. This is a type of motor which utilizes a switching contact such as a switch in one part of the roller (for example, TH Kaisho 5S-2TS72). However, in these conventional systems, the three functions of the commutation section, the current limiting element, and the disconnection section are each configured independently, so that the number of parts is large and the size is large. In addition, in the conventional method (2), since +2 is used for the fuse, it is not possible to repeatedly use one, and ((a), as shown in Fig. However, the present invention overcomes the disadvantages of conventional devices, enables double use at high voltage, and shares the switching contacts of the commutation section and the disconnection section. The purpose is to obtain a slit commutation forming ff device which is designed to reduce the number of parts, to be compact, and to simplify operation.One embodiment of the present invention will be described. Fig. 2 shows the same. Top view, Figure 3 is a front sectional view along A-A' paddle in Figure 2, River 4□□□ is B-B'faK in Figure 3
FIG. Its structure is as follows. Arc runners 3 and 4 (currently referred to as 1-runner poles) are provided in parallel above the fixed electrode 1 and the portable umbrella 2, and an intermediate arc runner 3 and 4 is provided between these runners 3 and 4. H'Ii 1410 is installed. A current-limiting resistor element (a fuse may also be used) 1] is connected between the runner electrode 3 and one of the runner electrodes (in Figs. 2 and 3). There is a protruding M on the runner electrode 3.t and the middle 1di m ridge to.
3'. 4' and 10' are provided, and these protrusions are wide in the vicinity of the fixed electrode l and Town Gai City Shun 2 (Fig. 144), and as they go to the small pole, middle, and tip of the runner. narrow<gt
(Fig. 4). The arc-extinguishing plate 6 is attached to the protrusions 3' and 10' and 10' and 41 so as to be sandwiched between the surfaces.
1 This arc-extinguishing plate 6, the protrusion 31, to' and to', and 4
1, the width of the slit is wide in the vicinity of the turtle (gt)
Lanna City I≠113. 4 and the tip of the intermediate electrode 10 are formed to be narrow (gt). The opening of this narrow gap g serves as the discharge port 9. With the above configuration, the fixed skewer outside the discharge port 9, the pole 1. oJvI
Out==2. Runner [11i3,4. Medium skewer: Goku to
By covering the arc-extinguishing plate 6 with an insulating container 7, the space between the fixed electrode 1 and the movable electrode 2 and the narrow space are formed as a pressurization chamber C. A fluid passage from this pressurization chamber 0 passes through a discharge port 9 and enters the atmosphere. It should be noted that the movable side electrode 2 and the runner electrode 4 are electrically connected to the current collector 5, and also have a sealing effect between the pressurization chamber C and the group in the atmosphere. Next, the operation will be explained. In a normal energized state, the fixed electrode 1 and the movable electrode 2 are in contact (although FIG. 2 shows an open state). When an overcurrent occurs, an external mechanism (not shown)
The movable electrode 2 is opened, and an arc is generated between the fixed electrode 1 and the movable electrode 2. This arc no] Yo trt4 sale 2 no 11
With the old ii j%j work, it has been lifted up, arcuate and cali,
Finally, the protrusions 31 and 41 of the runner acid &3.4 transition to 4$<10. The arc that came into contact with this intermediate electrode lO is connected to the intermediate wheel, the pole lO
It forms a mountain elm point on top and is divided. At this time, the width of 7 cities and 1 mountain road is: Identification...pole l-4 official + 1J11 runner sales 3 → protrusion 31 → arc 8. -4 Intermediate - Split protrusion

[()1 → Intermediate bond lO → Projection part to' → Arc 81-Machi/Yoshin Unna Yutaku projection part → 41 → d] 1.1 J11 Rule Runner City Game W
4 → Miichiko 5 → Movable Dragon 4, and its 11IISLl
The shape of ll is a convex shape, and the magnetic field generated by the runner electrodes 3 and 4 hW is arc if (one digit in one direction iCPI; 7 Lemming's left-hand rule). According to
The arc receives an electromagnetic force that goes around the upper narrower node at 493(n1) and travels once. By the way, in the present invention, Fj, *, Mf come from the path'
You mentioned electromagnetic force, but is there an external coil? A structure may also be used in which a magnetic field is applied at right angles to the arc. And due to the electromagnetic force, the arc is! lll void j
l) Recirculating and migrating into narrow slits. When the arc reaches a narrow gap with the same width as the diameter of the arc, the arc completely seals the pressurizing chamber C, so the pressure inside the pressurizing chamber rapidly rises due to gas expansion +11+ due to arc heat and melting and vaporization of the arc extinguishing plate. do. Due to this electromagnetic force and the pressure of the boost '410, the arc is forced into a narrower narrow space, and the arc resistance increases rapidly, and when it exceeds the resistance value of limit cap resistance 1], the 30th Matsubara arc 8 disappears, and the sleeper begins to run into the limit m resistance 11. At this time, the current path is fixed heavy contact 1 → surface fixed runner pole 3 → limit cap resistor IJ... intermediate electrode lO → intermediate electrode protrusion to' → arc 81 → town movement elevation j runner electrode protrusion 41 →Moving side runner wheel @ 4-4 Current collector 5 → Movable electrode 2. That is, the current limiting resistor 11 is inserted into the circuit, and the circuit current is significantly limited. Next, the arc 8' in this current-limited state is interrupted at the zero point of the alternating current. However, the straight 617 flow is quickly cut off under the condition of narrow 11Ji breaking performance. Thus, according to the present invention, at the opening/closing point 111, the arc's commercial velocity shift +, 1 + force and the corresponding amount ω create a turning part and a national T road part, and moreover, the arc moves to a narrower slit. Since the structure has such a pressurizing chamber, it is possible to reduce the number of parts, downsize, and simplify the operation [h1], and the limiting effect of the current limiting device can be significantly enhanced.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the conventional device, Figure 2, and Figure 3. Figure 4 shows the four cusps of the present invention)! ■Top...'' figure, front view, iti, and ll cross-sectional views in the example. l...fixed reason, 1 ridge, 2...rj dō-・IIl 猷pole, 3...fixed hole 1] Runner city, axis 31...li
1 Fixed 1-rule run-electrode protrusion, 4... Movable 1-rule runner pole, 41... 2. Rotating side runner electrode protrusion, 5
... Current collector, 6... Arc-extinguishing plate, 7... Insulating container,
8... Matsubara arc, 81... 1 peeking arc, 9...
・Discharge port, 10... Intermediate wheel 1 pole, l(1'... Medium curved width pole protrusion, 11... Limited hermitage resistance, lOl... Switch diverted to I&, 102... Disconnection switch, 103...
Current limiting element, 0... pressurization chamber, D... atmosphere. b 1 Imprisonment 4 Loquat 2 Figure 1 63 Figure

Claims (1)

[Claims] 1. Open tilii oJ possible fixed image, polar and possible ll1lJ
A pair of arc runner electrodes are placed in parallel on each electrode, and a pair of arc extinguishing plates are placed between the poles. Form a slit that narrows between the two sides to 1l.
fI + Eh, this arc runner assembly and the narrowest part of the arc runner assembly at the tip of the arc extinguishing plate are the discharge ports.
(By covering R and the arc-extinguishing plate with an insulating container, the space in the inner part and the space in the rigid part becomes a pressurizing chamber of 91 bodies due to arc heat, and is a current limiting device that closes the slit space with an arc. In the storehouse, Arch Runner's Armor of Archrunner 1 = 1
A current-limiting resistor element is connected between the intermediate electrode tyz and one of the arc runner electrodes, and the connected part of this current-limiting resistor element is used as a cap part, and the unconnected part is A slit commutation type limiter device that is completely characterized by being a disconnection section.