JPH04357632A - Current breaker - Google Patents

Abstract

PURPOSE:To display whether the electric applicances connected to a power source line are in use or not and to facilitate handling of the current breaker during power source line construction by providing a switch, a coil and a lamp which is lit with a specified or more than specified value current of the current. CONSTITUTION:Electric appliances 6 and a current breaker 1 are connected in series to a power source 7. Between the terminals of the breaker 1 are connected in parallel a switch-side circuit having a serial connection of a coil of a relay, a resistor 9 and a switch 5 and a lamp-side circuit having a serial connection of a relay 2 contact, a lamp 3 and a lamp protection resistor 4. When the electric appliance 6 connected to a power source line is turned to a condition of use with a switch 5 contact being kept closed, the relay 2 contact is closed whereby the lamp 3 connected in parallel to the relay 2 is lit. Further, if the value of the current capable of causing the relay 2 to operate is made selectable by the operation of the switch, it is possible to select a comparing current value for energizing the lamp 3 which conforms the quantity of use power for the appliances 6. By this, a display that the appliances are in use can be made and the handling during the construction period can be made easy.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current breaker, and more particularly to a current breaker used in a distribution board or the like to connect and disconnect power lines.

0002

2. Description of the Related Art Conventional current breakers do not have internal mechanisms for detecting and displaying the current flowing through the current breakers, and merely connect or disconnect power lines.

However, some distribution boards have a function of detecting the current flowing through the power line connected to the distribution board and displaying this with a lamp. however,
A mechanism for detecting and displaying the current flowing in a certain power line connected to the distribution board was not provided independently from a mechanism for detecting and displaying the current in other power lines on the distribution board.

0004

[Problems to be Solved by the Invention] Conventional current circuit breakers do not have a function to display the state of the current flowing through the current circuit breaker. Therefore, when current is flowing through the current breaker, that is, when the electrical equipment connected to the current breaker is in use, the person operating the current breaker recognizes that the electrical equipment is in use. There were cases where the power line was accidentally disconnected. As a result, the power supplied to the electrical equipment in use may suddenly be cut off, and in some cases, the electrical equipment may be damaged.

To prevent this, there are already distribution panels that detect and display the current flowing through the power line. However, this current detection and display mechanism does not exist independently for each power line connected to the distribution board, so it is necessary to relocate the distribution board or add more power lines branching from the distribution board. When the need arises, the entire distribution board must be adjusted.
There was a tendency for the construction area to become large.

[0006]

[Means for Solving the Problems] The current breaker of the present invention includes:
a current interrupting switch and a coil connected in series between a first and a second terminal, a contact that closes when current flows through the coil connected in series between the first and second terminals, and a constant It has a lamp that lights up with a current exceeding the value.

The current breaker of the present invention includes a current interrupting switch, a transformer whose primary side is connected in series with the current interrupting switch between first and second terminals, and a secondary circuit of the transformer. and a lamp connected to the next side.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the current breaker of the present invention. In this embodiment, a relay is used in the circuit section that detects the current flowing through the current breaker.

An electric device 6 and the current breaker 1 of this embodiment are connected in series to a power source 7. Between the terminals of the current breaker 1, there is a switch side circuit in which a coil of a relay 2, a resistor 9, and a switch 5 are connected in series, and contacts of the relay 2.
A lamp side circuit in which a lamp (LED) 3 and a resistor 4 for protecting the lamp are connected in series is connected in parallel.

In FIG. 1, when the electrical equipment 6 connected to the power line is put into use with the contacts of the switch 5 closed, the contacts of the relay 2 close and the lamp 3 connected in parallel to the relay 2 lights up. do. When the electrical device 6 returns to its unused state, the contacts of the relay 2 are opened and the lamp 3 is turned off.

FIG. 2 shows an improved version of the relay 2 of the embodiment shown in FIG. At the current breaker installation site, it will be possible to select a comparison current value for lighting a lamp that is appropriate for the amount of power used by the electrical equipment connected to the current breaker.

FIG. 3 is a circuit diagram of another embodiment of the present invention.

This embodiment is for an AC power supply, and a transformer is used in the circuit section for detecting current. The electric device 6 and the current breaker 11 of this embodiment are connected in series to the power source 7. A primary side of a transformer 12 and a switch 5 are connected in series between the terminals of the current breaker 11, and a lamp 3 and a resistor 4 are connected in series on the secondary side of the transformer 12. The lamp section that displays the current uses an LED that emits light only when a voltage of a certain level or higher is applied.

When the contacts of the switch 5 are closed and the electrical equipment 6 connected to the power line is in use, the current breaker 1 is activated.
A current flows through the primary side of the transformer 2 in the transformer 1, and as a result, a voltage is induced on the secondary side, and a lamp 3 connected to the secondary side lights up. When the use of the electrical equipment 6 is stopped, no voltage is induced on the secondary side of the transformer 2, and the lamp 3 is turned off.

FIG. 4 shows an improved version of the transformer 12 of the embodiment shown in FIG.
By making selection possible using the switch 13 connected to the current breaker, at the current breaker installation site, a comparison current value can be determined to light a lamp that is appropriate for the power consumption of the electrical equipment connected to the current breaker. You will be able to choose.

[0017]

Effects of the Invention The current breaker of the present invention includes a lamp inside the current breaker that indicates whether the current flowing through the power line connected to the current breaker is larger than the comparison current value determined by the current breaker. have. This provides the ability to display whether an electrical device connected to a power line is in use or not within a single current breaker, a relatively compact device that is easy to handle during power line construction. can.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing an improved version of the relay 2 in FIG. 1;

FIG. 3 is a circuit diagram of another embodiment of the present invention.

FIG. 4 is an improved version of the transformer 12 of FIG. 3;

[Explanation of symbols]

1 Current breaker 2 Relay 3 Lamp 5 Switch 6 Electrical equipment 8 Switch 11 Current breaker 12 Transformer 13 Switch

Claims (4)

[Claims] 1. A current interrupting switch and a coil connected in series between first and second terminals;
and a current breaker, comprising: a contact that closes when current flows through the coil connected in series between second terminals; and a lamp that lights up when the current exceeds a certain value. 2. A first or second terminal or a current cutoff switch is connected to one end of the coil, and the other end of the coil or one or more intermediate openings is connected to a comparison current value conversion switch. The current breaker according to claim 1, wherein the current interrupter is connected to the current interrupting switch or the second or first terminal by switching. 3. A current interrupting switch, a transformer having a primary side connected in series with the current interrupting switch between first and second terminals, and a transformer connected to a secondary side of the transformer. A current breaker comprising a lamp. Claim 4: A first or second terminal or power source;
A cutoff switch is connected to one end of the primary side of the transformer, and the other end of the primary side of the transformer or one or more intermediate openings is switched by a comparison current value conversion switch to cut off the current. switch or second or first
4. The current breaker according to claim 3, wherein the current breaker is connected to a terminal of the circuit breaker.