JPS58107019A - 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 invention of ξ is related to circuit breaker director ζ.

In particular, it relates to a circuit breaker that detects abnormal heat generation occurring in the terminal or contact portion of the circuit breaker, notifies the abnormality by voice, and simultaneously cuts off the fault current.

Conventionally, in this type of circuit breaker, if the connection of the terminal section that connects the external conductor is incomplete, the terminal section will burn out and the molded case will burn out due to the cuprous oxide multiplication heat generation phenomenon, and the power supply will be disconnected. ξ which induces a short circuit.

Furthermore, if a contact failure occurs due to Iζ such as foreign matter entering Iζ between the movable contact and the fixed contact, the circuit breaker will burn out.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional devices, and converts an analog signal from a sensor that detects electrophoresis into a digital signal in one circuit.

In a circuit breaker configured to have time-limiting characteristics using small and inexpensive microcomputer software, and to operate the opening/closing mechanism by the microcomputer's output signal to cut off fault current, the terminals and contactors are The signal from the temperature detection element is input to a microcomputer, and an LSI for voice synthesis connected to the microcomputer promptly notifies the location of abnormal heat generation by voice.

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

In Fig. 411, (1) is a circuit breaker that opens and closes contacts using a well-known toggle link mechanism Cζ, an overcurrent tripping element that trips in response to overcurrent or short-circuit current, and an overcurrent disconnection element that cuts off the current. It consists of an arc extinguisher that extinguishes the arc that occurs when the wire and conductor are connected, a contact that opens and closes the circuit, and a molded case glue ζ in which these are also assembled together. (R is a fixed contact (
c) An opening/closing mechanism with ~(2@) and movable contacts (l-)~(!f), which has quick-on and quick-off functions, and prevents the tripping operation even when the operating handle is restrained in the on position. It has a trip-free function and a common trip function that simultaneously turns on and off between eight poles, and has an interlocking relationship Cζ with electromagnetic device 4, which will be described later. (ag)～(J
1g) is a through-core that penetrates the internal conductor of each phase and has a notched winding portion, which is arranged for each phase, and Hall elements (4a) to (4), which will be described later, are attached to the notched portion. The magnetic flux generated by the current Cζ flowing through the internal conductor is transferred to the Hall element
4-) to (4C).

(4-) to (4.) are Hall elements that have a Hall effect and generate a voltage proportional to the product of the above magnetic flux passing through the interior of the through core (1st) to (8th) and the current flowing inside. This outputs a voltage proportional to the current flowing through the circuit breaker at the output terminal 1ζ. (6a) ~ (Ig)
is an overload voltage amplifier that amplifies the output voltage of the Hall elements (4a) to C4.
If the current passing through IJI) to CIJc) is below the rated current value, set it to a threshold value (for example, 1.8V) or lower; if an overload current flows in, set it to a value higher than the threshold value. has been done. (6a) to (s6 are overcurrent voltage amplifiers, whose output voltage is below a threshold value (for example, LIV) if the current passing through the through cores (8a) to (Ig) is 1000% or less of the rated current value. and the rated current is 1000
If an overcurrent of % or more flows in, the value C is higher than the threshold value.
ζ is set. (7) and (8) are logic circuits each consisting of an OR element, and if the input sides M to C are all at the #O# level below the threshold, the output side X outputs a voltage at the luxury/I level. .

On the other hand, if even one voltage above the threshold (#l# level voltage) is input to the input side M~C, the output side x1ζ
It outputs a level voltage. (9) is a microcomputer, including a central processing unit (9), a clock pulse generator C9k), and a program memory (9g).

It consists of a data memory (I-) and an input/output port (9), and determines the input signal from the OR element (1).

When an overload current of 1 meter flows through the circuit breaker as shown in Fig. 1, a time delay of i is calculated, and ? After a time, a signal is output from the input/output port O.).On the other hand, when the short circuit current Ik flows into the circuit breaker,
The input signal from the OR element (8) is determined and the signal is instantaneously output from the input/output port (11). (A) is an amplifier.

The signal from input/output #-) (II) is transferred to the transistor circuit (
Amplification function (not shown) and trigger circuit (not shown)
It has the function of issuing a trigger signal from the trigger signal. (
(b) The electromagnetic device 7 receives a trigger signal to excite the electromagnetic coil and drive the opening/closing mechanism (2). (Igm) to (12c) are power supply side terminals which have a function of connecting external conductive wires, and (1@m) to (llll@) are load side terminals. (14m) ~ (14c).

(11m) ~(15@) , (HLs) ~(1@
@) j! Temperature detection device, each power supply 1IIAI! ! i
child (IJa) ~ (12g), fixed contact (ga) ~
(IC) and movable contacts (knee) to (2f) are installed near the load side terminals (IJI) to (lag),
4 Elmo detects heat generation and transmits it to the microcomputer (9), which includes a temperature detection element consisting of a thermistor, a voltage amplifier that amplifies the output voltage of the temperature detection element, and an analog voltage from the voltage amplifier. Alternatively, it is composed of a logic circuit that converts the #l umbrella into a digital voltage. @ is the input/output port (9) of the microcomputer (9).
c) with a decoder connected to.

The abnormal heat generation display device (to), which has the function of decoding the digital signal input from the input/output port (s) and converting it into decimal numbers, is connected to the decoder (b) and displays abnormal heat generation. It is something. LSI for accusatory voice synthesis (・f
,) is connected to the path line of the miter and the computer (9).
IIS@) ~ (IIs), (1@a) ~ (1@c)
When the detection signal from the microcomputer (9)-ζ is input, the abnormal temperature rise state or abnormal temperature rise location is immediately notified by voice, and the microcomputer interface register, IF source generation circuit, and Dedicated interface, lattice digital filter, D-A
It has a built-in converter, timing logic circuit, clock oscillator, etc.

Next, the circuit breaker according to the present invention operates through the lk-th eagle contact (20~(2f) → through-through iron core (S~(8)) →
When an overload current flows in the circuit of n and ξ flowing to the load side terminals (lla) to (IIg), the Hall element (4@
)~(4@) is detected, and the overload voltage amplifier (60~(
An input signal is inputted to the microcomputer (9) 1ζ from the OR element (7) 1ζ. Then, by the arithmetic processing of the microcomputer (9), 'r
After a elapsed time, an output signal is output from the input/output port (9I). Also, if an overcurrent flows into this circuit, the overcurrent voltage amplifiers (6 turtles) to (6C) and the OR element (8) will cause the output signal to be output from the input/output port (-) at TTh at I1. Output. The electromagnetic device (b) is driven by the output signal of the input/output boat (9), which activates the opening/closing mechanism part ψ) to interrupt the fault current.

Table 1 Next, the operations of the decoder (b) and the abnormality display device (g) will be explained using Table 1. Temperature detection device (port a) ~ (port I) - (IIa) ~ (15c), (16m)
~(16＠) (If the detected temperature D is normal, each output signal is input to the microcomputer (9) at #O# level, so the output signal from the input/output port (9) is All input terminals A and B of the decoder (B) are at #O# level.

Enter it in C8 Juku. Decoder 〇 decodes this and the output side glue terminal becomes logic 1. Next, when the upper Iiagit source holder (111s) generates abnormal heat, the input signal from the temperature detection device (low) is input to the microcomputer (9) at #l# level, so the input/output board ( I
#p level output signal is output from @), and the decoder (
Input to the input terminal ^ of (b). The decoder decodes this, and one terminal on the output side becomes logic 1. Next, the movable contact (!!・) and fixed contact (1 m
), if abnormal heat is generated between the
Since the input signal from b) is input to the microcomputer (Q) at #l# level, the input/output board (9)
An output signal of #1# level is output from.

Input to input terminal C of Deco-Kyo. Decoder (
b) Decode this n and the 6 terminals of the output value become logic 1.

The abnormal heat generation display device (to) outputs #l# from this point when the decimal output terminal of decoder 07) becomes logic l.
Since a level voltage signal is output, a lighting display or alarm is generated only at that location. For example, decoder (2
) output terminal 1 becomes logic 1, abnormal heat generation display device Q
Part 1 of I lights up or generates an alarm. Therefore, from Table 1, it can be determined whether the power supply side terminal (1 gm) was abnormally heated.

To explain in more detail, when the 1wl source terminal (12g+) generates abnormal heat, the 1ζ will be
A voltage signal at the level of one fist is input to the input/output port (9@) of the microcomputer (9). The software of the microcomputer (9) processes this, and the input terminal of the decoder (L'I) is sent from the input/output board (9) to the input end of the decoder (L'I).
Since it is programmed to input an X-level signal, the input side of the decoder Q21 becomes a binary number of Iooo. The decoder ■ decodes this, and the output terminal l becomes logic 1. Therefore, part 1 of the temperature display device (to) lights up or issues an alarm due to the #l# level voltage signal from the decoder.

From Table 1, it is indicated that the power supply side terminal (11m) has an abnormal temperature ξ. At the same time, an LSI for speech synthesis
(If) lζ Therefore, the location where the temperature has risen abnormally or the location where the temperature has risen abnormally is notified by voice.

This invention is configured as described above, and 5. A microcomputer (.) determines the fault current flowing into the circuit breaker (1) and uses appropriate arithmetic processing to activate the opening/closing mechanism (2).
, and immediately cut off the circuit @(υ). At the same time, according to Table 1, the temperature display device 1 indicates the location of abnormal heat generation.
(2) ・Thus, the cause of abnormal heat generation can be quickly determined, and accident countermeasures can be taken quickly.

In addition, discrimination and calculation processing are performed by software.
Because of this, the internal mechanism of the single-circuit breaker is simple, and assembly is easy and the tM is small. And that he had an abnormal fever.

Because it is possible to know from the voice of the voice synthesis LSI (If), accident countermeasures can be taken promptly.

It is possible to prevent the development of a major accident.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing an embodiment of the circuit breaker according to the present invention, and the ms diagram is a characteristic curve diagram showing the operating characteristics of the circuit breaker. In the figure, (1) is the opening/closing mechanism part, (8a) to (8C
) is a through core, (4m) to (4C) are Hall elements, (
6.)~(Ijg), (1m)~(6@) are overloaded! voltage amplifier for overcurrent, (γ), (8) is an OR element, (9) is a microcomputer, (90 is Lll for voice synthesis, O is an amplifier device, (b) is an electromagnetic device, (14s) ~ (mouth t) , (li
m) ~ (llig). (ll@) to (1eg) are temperature detection devices, and (b) is a decoder. Zeng is a temperature display device. Agent Bentoshi Shin Kuzuno - Figure 1 - - □ - - 1 °2α2d 7 12b 2e 4 14c
1 C 6c j 11

Claims (1)

[Claims] (1) A plurality of voltage amplifiers that respond according to the current value flowing through the conductor of each phase of the circuit breaker, a program Cζ into which the outputs of the plurality of voltage amplifiers are applied and input, so the opening/closing mechanism of the circuit breaker A microcomputer that produces an output that operates the wJ path. A temperature detection Vtt is installed near the conductor connection part of the disconnector or the contact of the opening/closing mechanism part, and a temperature detection Vtt is connected to the microcomputer to detect abnormal heat generation of the connection part or the contact and transmit it to the microcomputer. A circuit breaker characterized in that it is equipped with a voice synthesis Lll that notifies abnormal heat generation by voice.