JPS5836120A - Circuit 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 an IJ circuit breaker, and more particularly to a circuit breaker equipped with a display tube for displaying a tILL flow value at the time of a fault current cutoff.

Generally, when using a D-way circuit breaker, it is difficult to determine the breaking current value when the current is cut off, making it difficult to take countermeasures against circuit accidents. A circuit breaker configured to convert it into a digital signal, give it time-limiting characteristics using software on a small and inexpensive microcomputer, and operate the opening/closing @ structure using the output number 1g of the microcomputer to cut off the % field flow. In this device, a decoder is connected to the human output port of the microcomputer, and a display tube is connected to the output terminal of the decoder, thereby displaying the cutoff current value when the φ discharge flow is cut off. An embodiment of the present invention will be explained below using one circle.

FIG. 1 is a circuit configuration diagram showing an embodiment of the circuit breaker according to the present invention, and FIG. 2 is a characteristic curve diagram showing the operating characteristics of the circuit breaker.

In Fig. 1, % (1) is a circuit breaker - A switching mechanism that opens and closes contacts using a well-known toggle link mechanism - An overcurrent tripping element that trips in response to overcurrent or short-circuit current, and cuts off the iE current. It consists of an arc extinguishing device that extinguishes the arc that occurs when the arc occurs, a terminal that connects electric wires and conductors, a contact that opens and closes the circuit, and a molded case that integrates these. (2) is the opening/closing mechanism part. Equipped with a common trigger release function that does not disturb the tripping operation even when the quick-on 9 and quick-off functions % operation handle is restrained in the on position. As mentioned below! There is a coercive relationship between the magnetic devices. (8a) to (8C) are the internal conductors of each phase e
[Through the through core, which is arranged for each phase and has a notch, a fast Hall element (4a) is installed in one notch.
(4C) is attached, and the function of transmitting the magnetic flux generated by the current flowing through the internal conductor to the Hall elements (4a) to (40) is If f/)e (4a) to (4C).
is a Hall element having a Hall effect, and the through core (8a)
The above magnetic flux passing through the interior of ~(8C) and ' flowing inside'
Is it a circuit that generates a voltage proportional to the value of the first current? It is proportional to the current flowing in the disconnector and outputs the fc pressure to the output terminal. ◎(5a) to (6C) are Hall elements (4a
) to (4C) is an overload voltage amplifier that outputs the direct pressure of the outputs (8a) to (8C).
) If the current passing through the capacitor is less than 1 DC, it is set to a value less than the threshold value (for example, 1.8 V), and if the overload current is 1ylC, it is set to a value greater than the threshold value. o (6a) to (6b) are voltage amplifiers for overcurrent, and their output voltage is rated at 100% or less if the current passing through the through cores (8a) to (8C) is less than 1000% of the rated current value. (e.g. 1.8 V) and the rated current value 1
If an overcurrent of 000 or more flows in, the value is set to be greater than the threshold value.

(7) and (8) are art world circuits consisting of Oher's wife and children, and the human power 9111A to 0 are all below the threshold v) I
If QI is 17 bells, output, 10 X ri'0'
On the other hand, if even one voltage at the direct voltage llI level that is higher than the threshold is input to the human input IIOA~0, the voltage at the llI level will be output to the output -X. 9) is a microcomputer, including a central processing unit (9a) and a black pulse generator (91).
%Program memory (9C)%Data memory (9d)
and an input/output port (9θ), and determines the input signal from the OR element (7).If an overload current Ia shown in Figure 2 flows to the circuit breaker, the time Ta will be determined. Calculate the delay and see if there will be a crowd after % Ta time? (9
e), and on the other hand, short circuit current 1
If b flows into the circuit breaker, then the OR element (
8) Distinguish the human power signal from the instantaneous Tb input/output cuff.
0suQ, which is programmed to output a signal from the input/output port (9e), is an amplifier device that has the function of amplifying the signal from the input/output port (9e) with a transistor circuit (not shown) and a trigger circuit. , the function of outputting a trigger signal from the road (not shown) is an electric device, which receives the trigger signal and magnetizes the magnetic coil rvJ to drive the opening/closing mechanism part (2). (12a) ~ (1)
2c) is the power supply side terminal with Ill @15 that connects the external conductor 4III, (18a) to (18c) ri load side terminal o tl4 is the micro combinator (9)
Using the decoder that was achieved in ``Kapo'' (98), we deciphered the binary number 1g manually from ``Kapo'' (9e).
0 display tube 0 that converts to 0 base/) function
The decoder (141VC is connected to cut off the cutoff DC value).

Next, the operation of the circuit breaker according to the present invention is illustrated in FIGS. 1 to 8.
This will be explained using figures. In Fig. 1, *flow is power supply side terminals (12a) to (12c) → contactor of switchgear groove (2) → through core (8a) to (8c) → negative side terminal (1
If an overload' current flows through this circuit, the Hall elements (4a) to (4C) detect it, and the OR element, ! ), the human power signal is sent to the microcomputer (tl).
After the voltage has passed, an output signal is output from the human output boat (9θ) ◎ Also, if there is an excessive current in this circuit, the overcurrent sills (6a) to (6c) are connected. Due to the OR element (8), an output signal is instantaneously output from the input/output port (9θ). The 9% electromagnetic device (Ill) is driven by the output signal of the input/output boat (9e) and operates the 1 opening/closing mechanism (2) to cut off the fault current.Next, the operation of the 1 decoder U4 and the display tube side is activated. This will be explained using Table 1. Now, if the circuit current is below the rated current, the input signals from the OR elements (7) and (8) will be input to the microcomputer (9) in the IQ level state, so the input and output capacitors will be -) The output signals from (9e) are all lOlO signals at the input terminals A, B, O of the decoder α.

The 0 decoder lI4 manually input to D decodes this, and when an overload current of 600 yen, which is the rated current, flows into the 0-order circuit breaker (1), the 0 terminal on the output side becomes logic O.
Since the input signal from the OR element (7) is input to the microcomputer (9) at the t1z level, the output 1g at the 11 level is output from the human output boat (9θ) and is input to the input terminals A and B of the decoder I. Input ・Decoder I decodes this, and the 8 terminals on the output side become logic 0.
Next, the circuit breaker (1) is connected to a short-circuit DC (rated ionizing voltage of 5OO).
o4 or above), the input signal from the OR element 8) is input to the 111 level -tll't'l black computer (9), so the output signal of Ill level from the human output boat (se) The Q decoder (14 decodes this, and the 9 terminals on the output side become logic 0.0 display tube 051 is the lO base ratio output terminal of the decoder circle, which is output by the Q decoder (14) which outputs it manually to the input terminals A and D of the decoder circle. When it becomes O, a discharge current flows into this location, so only that location is lit up.For example, the output terminal of decoder 04 (
When 3) becomes logic 0, the part 8 for the display tube lights up and is displayed. If Q, that is, 600 CH overload current of 1 rated 1 current flows in, the decoder I from the output boat C96) Since input terminal A is programmed to input a BK#1# level signal, it becomes a binary number on the input side rilloO of decoder +141.

Decoder a4 decodes this and output terminal 8 becomes cooking O. [So, the discharge current flows from the side of the display tube to the terminal of logic O, so the section i1 of 8 of the display tube lights up ◎In other words, from Table 1, the breaking current of the circuit breaker is 410%~
6101 DC current is displayed. This invention is constructed as described above, and the microcomputer (9) circuits and determines the fault current flowing into the interrupter (1), and uses appropriate arithmetic processing to detect the fault current in the switchgear. If the circuit breaker (1) is immediately turned on and the circuit breaker (1) is interrupted, the fault current value is displayed on the display tube 01 as shown in Table 1.・Therefore, the cause of a circuit breaker can be quickly determined and countermeasures can be taken quickly. Also, since the determination and calculation process is executed by X software, the internal mechanism of the circuit breaker is simplified, 11 Easy to erect and compact @ As described above, according to the present invention, it has various effects such as being able to indicate the cause of the accident, making assembly easy, and reducing the size.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram showing an embodiment of the circuit interrupter according to the present invention, and Fig. 2 is a characteristic curve diagram showing the operating characteristics of the circuit interrupter. Opening/closing trIA411 part, (8a)
~(8c) U-quality conductive core, (4a) ~(4c) are Hall elements, (5a) ~(5c), (6a) ~(
6c) is for overload and overcurrent pressure plate width% (7),
(8) is an OR element, (9) is a microcomputer,
Trout is an amplifier, (11) is an electric AT display, O is a decoder, and G is a display tube.0 Agent Patent Attorney Shin Kuzuno -

Claims (1)

[Claims] (1) A plurality of Satsutsu iron cores are installed through the conductors of each phase of the circuit breaker and each has a gap, and the magnetic flux and voltage due to the respective currents installed in the gap and flowing through the conductors of each phase. a plurality of 1-voltage amplifiers connected to each of the Hall resistors and responsive to the current value flowing through the four arms of each phase;
The output of the 5-width switch is applied to a microcomputer that generates an output that operates the opening/closing mechanism of the circuit breaker according to the human power program, and is connected to the 4e microcomputer and responds to the interruption current value in the event of an accident DC or W+. 1. A circuit breaker comprising a decoder 1 for converting a binary power signal of a microcomputer into a lO base number, and a display tube connected to the decoder and displaying the cut-off current value.