JPS59219829A - Display lamp unit of 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 [Technical field to which the invention pertains] The present invention relates to an indicator light device that indicates whether or not an electric circuit to which a circuit breaker such as a wiring breaker or an earth leakage breaker is connected is energized.

[Prior art and its problems]

When maintaining electrical equipment, it is important for those involved to always understand the status of the power source. For this reason, if a voltmeter or indicator light device is not provided on the power supply side, an indicator light device is attached to a circuit breaker such as a wiring breaker or an earth leakage breaker so that it can be seen at all times. A conventional example of such an indicator light device for an earth leakage breaker is shown in FIGS. 1 and 2. In Fig. 1, the earth leakage breaker is housed in a case 1 indicated by a dashed line, has one external connection terminal 2 that also serves as a fixed contact, and forms an opening/closing breaker opposite the fixed contact of this external connection terminal 2. A movable contactor 3 for detecting an overcurrent, an overcurrent tripping device 4 for detecting an overcurrent and interrupting an electric circuit, and a conductor 6 passing through an annular core 5 are connected in series and connected to the other connecting terminal 7 and pulled out. ing. A secondary coil 8 is wound around the annular core 5 to form a zero-phase current transformer together with the through conductor 6, and the amplifier section 10 uses the other connection terminal 7 as a control power source, with the secondary coil 8 at its input end. and its output end is connected to the release device 11. Reference numeral 12 denotes a test circuit for testing the operation of this earth leakage interrupter. Note that the external connection terminals 2 and 7 are connected to the terminal cover 15 shown by the two-dot chain line.
It is protected from short circuits and human contact hazards. This earth leakage breaker indicator light device includes a neon lamp 13 and a safety resistor 14, which are connected in series and connected to one connection terminal 2 or the other connection terminal 7. As shown in Fig. 2, there is an operating knob 16 for the movable contact on the front of the case l that houses the breaker body. Together with the push button switch 17 of the test circuit 12, it is provided inside a window 18 covered with a colored transparent plate.

Reference numeral 19 indicates a mounting screw hole for the terminal cover 15.

In this earth leakage breaker, a power source is connected to one external connection terminal 2, a load is connected to the other external connection terminal 7, and the opening/closing breaker is turned on. If the indicator light device is connected to one connection terminal 2, the neon lamp 13 lights up when this breaker is connected to the power supply, and if it is connected to the other connection terminal 7, this breaker lights up. When the button is inserted, the neon rung 13 lights up. If both connection terminals 2.7 are connected, the energizing state of the power supply side and the breaker activation can be displayed separately. In this case, there are two windows 18, and the transparent plates are distinguished by color. When an overcurrent flows in the load circuit, the overcurrent tripping device 4 operates, and the movable contact 3
is open (. Also, when grounding or leakage occurs in the load, a voltage is induced in the secondary coil 8 of the zero-phase current transformer, amplified by the amplifier 10, and the movable contact 3 is opened via the release device 11.

Such a circuit breaker has the disadvantage that the indicator light device must be installed in a narrow space where an arc extinguishing chamber and a large number of parts are installed, and where phase-to-phase insulation is also completely provided. For this reason, if it was planned from the beginning of production, it could be worked out somehow, but it has the disadvantage that it is almost impossible to add an indicator light device after the breaker is completed.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide an indicator light device for a circuit breaker that is easy to install and can be easily added.

[Key points of the invention]

The present invention is an indicator light device for a circuit breaker that is connected to a power source and a load via an external connection terminal and controls opening/closing or cutting off of the load, wherein the terminal cover of the external connection terminal is covered with a transparent plate. A window is provided, and an indicator light is installed inside the window, and conductive contact springs connected to both output wires of the indicator light are connected to different external connection terminals by covering the external connection terminals with this cover. It is designed to be in electrical contact with the That is, this indicator light device is mounted inside the cover so as to be connected to the external connection terminal by covering the external connection terminal with the terminal cover. Therefore, regardless of the case in which the breaker is housed, the breaker can be installed in a relatively wide area and can be easily attached and detached.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to FIGS. 3 to 5. In FIG. 3, the point that the neon rung 13 and the safety resistor 14 are connected to the external connection terminal 2 which also serves as a fixed contact is the same as in the conventional case, but this indicator light device is connected to the external connection terminal 2 as shown in FIG. 2 terminal cover 15
is located inside. More specifically, the terminal cover 15 is provided with a window 18 covered with a colored transparent plate, and a neon lamp 13 is attached to the inside of the window 18 that can be seen from outside. 1
3a is a dog-shaped conductive contact leaf spring 2 attached to a separating plate 20 of a cover 15 that separates one phase of the connection terminals.
1, and the opposite sunrise wire 13a is connected via a safety resistor 14 to another contact leaf spring 21 of the same shape, which is attached to a separator 20 separating the other phases. These neon lamps 13 and safety resistors 14 are housed in protective cases 22 and 23, respectively. This terminal cover 1
5 to the external connection terminal 2 as shown by the two-dot dotted line in FIG. Since the current of the neon lamp 13 is small, this level of contact is sufficient for electrical connection. Therefore, if a power source is connected to the external connection terminal 2 in advance, the indicator light device will indicate by lighting the neon lamp 13 whether or not the power source voltage is applied. Fixed contact that also serves as connection terminal 2 inside the breaker, movable contact 3, overcurrent tripping device 4, zero-phase current transformer (annular iron core 52 penetrating conductor 6, secondary coil) v 3 ), amplifier 10, release The connections of the test circuit 11, test circuit 12, etc. are the same as before, and the operation of the operation handle 6, push button switch 17 and operation of the circuit breaker are the same as in the conventional one shown in Figs. 1 and 2. This explanation will be omitted. In addition, if the terminal cover to which this indicator light device is attached is attached to the other connection terminal 7, it can be used as an indicator light device to indicate whether the breaker is turned on or shut off, and it can also be attached to both terminal covers. .

〔Effect of the invention〕

As described above, in the circuit breaker indicator light device according to the present invention, the indicator light attached to the 5-terminal cover contacts the external connection terminal via the conductive contact plate spring, thereby electrically connecting the external connection terminal. is configured to be Therefore, since it has nothing to do with the inside of the breaker, it is easy to install, and can be additionally installed after the breaker is assembled, and is an excellent device that can be easily installed on both the power supply side and the load side.

[Brief explanation of the drawing]

Figure 1 is a wiring diagram of a conventional earth leakage breaker equipped with an indicator light device, Figure 2 is a front view of the earth leakage breaker body shown in Figure 1,
Fig. 3 is a wiring diagram of a leakage breaker equipped with an indicator light device according to the present invention, Fig. 4 is a front view of the leakage breaker main body shown in Fig. 3, and Fig. 5 is the same as Fig. 4. FIG. 2 is a perspective view of a terminal cover equipped with an indicator light device for an earth leakage breaker shown in FIG. 2.7・External connection terminal, 13...Neon lamp, 13
a... Sunrise wire of neon lamp, 15... Terminal cover, 18... Window covered with transparent plate, 21... Conductive contact spring. Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] l) Connected to the power supply and load via external connection terminals,
This is an indicator light device for a circuit breaker that controls opening/closing or cutting off of a load, in which a window covered with a transparent plate is provided in the terminal cover of the external connection terminal, an indicator light is attached inside this window, and the indicator light is provided with a window covered with a transparent plate. By covering the external connection terminal with this cover, the conductive contact springs are connected to both of the Hide lines, respectively.