JPS5946725A - Vacuum degree monitor for vacuum breaker - 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 relates to a vacuum breaker monitoring side.

Generally, the degree of vacuum of a vacuum breaker is 10-'To'r.
It has normal breaking ability at pressures below 'r, but this degree of vacuum deteriorates due to gas released from inside the breaker and slow leakage from joints such as welding and brazing, and the breaking ability decreases ( For this reason,
When using a vacuum breaker, it is essential to monitor the degree of vacuum in order to guarantee performance.

Therefore, in the past, vacuum shield III? Released inside the container
In addition to installing an FM pole, high voltage of 1 voltage was applied from a separate power supply, and the vacuum level was checked by taking advantage of the fact that the left state at this time changed depending on the vacuum level, but this method is impossible! As the clay making of the ramie cutter became more and more sloppy, another source with high pressure was prepared.1. It became expensive because it had to be polished. In addition, when checking the R 11, if the vacuum breaker i5 is disconnected from the circuit, open the vacuum breaker by a distance from the movable fixed voltage 4a that is easy to leave due to vacuum deterioration. , applying high tonne pressure from one source of another type,
The quality of the vacuum level was determined based on the radial ridge shape at this time.11 This method required that the sinter source be refilled, which was extremely troublesome.

The present invention eliminates the above-mentioned drawbacks, eliminates the need for separate sources of high voltage, and eliminates the need for separate sources of high voltage. It is possible to check the degree of vacuum with RJFS, and it is possible to check the degree of vacuum by using a vacuum monitoring device that can be used in one place.
(Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, ] is a vacuum breaker, a vacuum breaker 1
A vacuum container is formed by attaching metal end plates 3.4 to both ends of the insulating cylinder 2, and a fixed IJ-board 5 is inserted into the end plate 3, and the end plate 4V? : is the movable lead 7 via the bellows 6
One person is movably inserted, 11 constant lead 5 and town i1 +
II') - At the front door of the door, fix the fixed tortoises 1 to 8 and υ)' tortoise 41 to 9, respectively. Also, A.l.c [:
In the middle of the desired m) 2, there is a Vr-
Attach a shield 1 () to prevent the generated metal vapor from forming on the inner surface of the insulating surface 2.11.12 is an auxiliary shield, ]3 is an external connection 44, and this 1; Conductor J3 is connected to load 1ull.
Reference numeral 14 is an insulating rod whose details are shown in Example 5-J. One end of this insulating rod 14 is pivoted to the movable reed 7 via a lever 15, and the other end of the rod 14 valves an operating spring 16. The controller is connected to an operating device not shown.

Is Figure 2 vacuum breaker 1? Resin 7 such as epoxy resin
0, and the outer surface of the seven-faced body is covered with a ground layer 4o to form a disk body 41. In this Figure 2, 42 is a sliding contact, 43 is a ring contact,
44 is a conductor connected to the bus bar side. Reference numeral 45 denotes a box housing an oro-l emptyness extractor, the details of which will be described later.
A coaxial cable 46 is led out from the bottom of the cable 46, and a sensor installed at the tip of the cable 46 detects (1!).
The device is installed in lff1 rod 14. Reference numeral 47 indicates an operating device 2, 48 indicates a bus box, and 49 indicates four connections, each of which is made of a resin mold 50 which is broken with a ground layer 4o.・)l is outdoor Yamikane, ゛11 bodies, 52 is +E Ili car,
53 is the backing, 54 is the bolt/nut for freeing, 55
is a stand.

Fig. 43 is an enlarged view of the part where the sensor is attached to the 4fl a.d. 14. +7 view, in this third figure,
Reference numeral 56 denotes a sensor which is placed over the end of the insulating rod 14, and this sensor 56 may have a semicircular shape as shown in the 4th IA to 41st IDπ, or a shape made by simply bending the conductor. Be composed of things. Note that the sensor 56 is not limited to the shape Vr, but is straight 1'1i+i! Tochichi of the state! ]It may be wood1. In Fig. 3, numeral 57 is a circular metal body having a protrusion 58 for slow phase, 59 is a gold plate, and a resin mold ('JV', m: currency) in which a part of the 4 body 57 is embedded. ), 6() is a mounting body consisting of an electrode attached to the insulating rod 14.

No. 51 νIA is a block diagram showing details of the vacuum level used in the box body 45, 23 is a buffer amplifier that amplifies the detection (no. 4) outputted by the sensor 56, and 24 is an output signal of the buffer amplifier 2 to 2 from s+) shown in Figure 5 BK
The output signal of this band-pass filter 24 (82 shown in FIG. Figure 5 BK fs,
) is input to the first comparator 26 and compared with a predetermined reference voltage. The output signal of the first comparator 26 (shown in FIG. The pressure is input to the pressure sensor 28 and compared with a predetermined reference pressure of the second comparator 28, and the output of the pressure signal S6 is sent to the second sensor Is. This signal becomes the ship report and display number 4g.

In the above 11[- configuration, the breaker 1 moves the 53 engagement 1 by the operation direction 47, connects and separates the 1 pole 8.9, makes the connection, and then ijt. The front circuit diagram of the 1-line breaker 1 is shown in Figure 6 with dimensions 1°.
The first, second and third loads of the circuit, 30 and 31, are respectively IF! il f +7- part and fixed amount in the silicone container of door 5, resistance and cape city between pole 8 and shield 10, capacity -132, 33 are respectively gQ+ IJ- door's outside part in the container and Eye ■ Movement [:), resistance between part 9 and shield 10, mouth J 4ti+ l resistance and capacitance between a pole 9 and shield 10, H4d and 34b are respectively insulating surface 2
35 is the resistance between the shield lO and the ground layer 40, 36° and 37 are the resistance, electrostatic capacity, and capacitance between the electrodes 8 and 9 in the cutoff state, respectively. When the internal airflow of the RC air breaker l deteriorates and the internal te force increases, the capacitance is 31, because the dielectric constant in vacuum and the dielectric constant in the atmosphere are almost different. 33.37 hardly changes,
Resistance 30 + 32 # 36 is no (Tsien's law &
It is clearly lower than r. For this reason, the insulating tube 2 prevents the fixed side and the terminal from being tightly connected.
Between the shield io, which is stunned and has a floating position, and each city 18.9, scattering occurs regardless of the official state and drunkenness, and between the air i and i8.9. Radiation occurs only in the cut-off state.1. this)j
k't4y changes depending on the cable (capacitance) connected to the load side, the inductive/haze line, or the capacitance of the lead of the self-air breaker. Fig. 7 fBl shows the signal received by the sensor 56F. 1- That is, when the totality is normal, the [k pressure? Peel J Cedar is a correct coating liquid, and Senna 56vC is α 9 1 r rotation outside the equipment, transformer, meter 1. L: I don't know where it comes from, but the signal that reads him in 1 G below 2KHz is human-powered! ! 81filAl and CB
) is the mouth, no iiD "Ai l (Q (((misuse of the import 6 whose sudden change has deteriorated 1. mouth: If, t+ and the reception signal of the sensor 56, the dust detection of the 41-8 and 91i-11 is , IE is the old mountain, and when it starts) ■ 8 Figure (A) 6 is like Neo, the quasi ° tail or more VC is above + r - tr, and in front of him, a ripple occurs in the agitation. This ripple meeting Birth K
Tx8 Figure IB) [High frequency of 2 to 20 KHz like this? A wave signal is generated, and by detecting and judging this signal, it is possible to detect sudden deterioration of the vacuum breaker. 3. Even if corona radiation occurs outside of other areas, the signal waveform will be different, so it will have no effect on the construction characteristics.

-1 When the E mechanical failure of the air breaker 1 is deteriorating, the sensor 56 is detected as 14. Receive magnetic wave signals. Vacuum K 3.5X
The insect magnetic wave that was changed between 10-2 and 60'LOrr and fixed with IA111 has a capacitance between the ground of load IH11 of 9.004
At 2μF! (1 to 14 KHz %0.05 μF 2 to 8 KHz, 0.21LF and t+, 21t
When F or more, 2 to 2 (JK[-(Includes the frequency of Time is 0.2
It is good to connect static T11t and capacitance to ground of μF, Kai 5I NuIA.

As shown in 8, the buffer amplifier 23 amplifies this signal and sends out an output signal S1. This output 'i'j ”'5
S
Output S2 from 1, this output No. 14 S2 is amplifier 2
5. This increase of 11% 1 is applied to the first comparator 26 manually. +1!1 comparison? ,'fi
26 vr, the signal SS and f9i constant ゛,
(/I: input 9, the planter 27 removes the deviation signal of the first comparator 26 by 4 and inputs the output signal 85 to the second comparator 28 1, the second ratio IFffi unit 28 inputs the signal Comparing 85 with the predetermined Bakujun Arashi I-cho, its deviation city, tE signal No. S
Output 6! Operate miscellaneous equipment or display, ↓']-p
11 If deterioration is detected, Figure 49 is a diagram showing another implementation of the vacuum degree J'i detector, and the insulated operating rod K L
4'd sensor 56 is goo 41 le 46? Only frequency components from 2 to 20KH7 through! The output of this filter 24θ) is inputted to the onroscope 62vr, and the waveform is analyzed by the oscilloscope 62. 1. As a result of this observation, waveforms such as those shown in Figure 10 A and H are shown on the oscilloscope 62, and then waves j1 such as those shown in Figure 11 A and B appear at 7t. When you see something, you can tell that it is a place. yz oh, car 10 A and 11 A
is the output when the output of the sensor 56 is inputted to the YiM radio oscilloscope without using a bandpass filter.

With the configuration shown in Figure 89 above, the measurement conditions are 1 o w, , ? 'Yatsupu, application - cap〒-+l+-J-1↑rlT-1''+7liner Electromagnetic sensor 18'nm mold's solid all-wire vacuum shield Remove it from the breaker, and then test the pressure resistance of the breaker a (distance 1liff between a and 41) at section J.

[Includes 11 guns, according to royal law, 11. However, according to the example, the insulated rod r sensor mounting) 8 and the cable Just input it to the detector, and set the main circuit breaker to +;
When deteriorating, Paschen's law +41J K releases the distance between the city and one pole.
``Receive the late If1 number that comes out every now and then with the sensor (-1
From this sensor π, it is possible to directly process the information received by 1d and 2 to produce ↓1 airspace deterioration. A c, te↓ is cut off ÷): ÷ is turned and 11y from the heat.

Is there no need to remove it and is there a vacuum breaker? In addition, there is no need to set a pressure or provide a stopper, and deterioration of the vacuum degree can be detected easily and inexpensively.

According to the vacuum degree supervision in the above-mentioned 6 real M[j example,
It is suitable for the vacuum breaker Vr14, which is already in use and is completely ground shielded, and can detect sudden deterioration of the device under live wire conditions. In addition, to save energy for the detection unit, a commercial 'frLm' or a battery may be used, making it compact and convenient to carry.

As described above, the present invention is equipped with a detector equipped with a sensor and a band-pass filter that detect electromagnetic wave signals including high frequencies of 2 to 20 KH2 generated when the vacuum chamber M1 is idle. ) When the vacuum level of the disconnector deteriorates, the sensor detects that the internal discharge occurs;
The signal can be electrically processed (-) to detect deterioration of the degree of vacuum.
IzaIW can be detected well without being affected by atmospheric noise Δ1, ψ
π insertion P degree deterioration blooms 1 festival and 1 empty 11J1 device? There is no need to remove or remove the circuit, and there is no need to change the structure of the air breaker or to submerge a separate high-voltage source. correct am r i
s can be issued.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional front view of the vacuum breaker, and Figure 2 shows the actual product of the present invention, rr1111da1, with a cutaway.
Figure 4A to Figure 41D are configuration diagrams showing different examples of the sensor, Figure 5A is α I block diagram showing the details of the sudden change 14 output part, rP; 51 Nu IB is the output waveform 1 to the same figure.
1, cod 6;) χ1 is the equivalent circuit diagram of the true r2shi and l chisel in the new state of FIG. Figure 9 is a schematic configuration diagram of a vacuum deterioration detection section showing another embodiment of the present invention; FIG. 6 is an output waveform diagram of another i4 embodiment of the invention. . 1... Nasal breaker, 14... Insulating rod, 40...
...Ground layer, 45...'1. i body, 56...sensor.

Claims (1)

[Claims] txt In a vacuum breaker that generates internal discharge when the degree of internal vacuum deteriorates, the vacuum breaker is molded with synthetic resin, and the surface of the mold is covered and the ground is almost the same. The ground layer maintained and the ground layer derived from a predetermined portion of this ground 1-. An operating insulating rod connected to the n1oT moving lead rod connected to the power source of the vacuum breaker, and a sensor attached to this insulating rod to detect a wide magnetic wave generated by MB discharge in IIJ. and. This sensor Vr: A vacuum level monitoring device for an air breaker, consisting of a detector that is electrically and electrically connected and equipped with a bandpass filter that passes only frequency components from 2KH7 to 20KH7.