JP2000251978A - Terminal board with current measuring jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate disconnection of a wire for measuring current and measure the current even when electricity is carried on a circuit by fixing a conducting plate spring to a terminal fixing plate of a terminal board and inserting a measuring plug between the plate springs. SOLUTION: Conducting plate springs 7 having a size capable of passing a specified current are welded to a pair of terminal fixing plates 6 so as to have constant surface pressure on the contact surface, and fixed to a terminal board body B formed so that the terminal fixing plates 6 are fixed. The terminal board body B has an inserting opening 4 having a size capable of inserting a measuring plug A installed just above a contact part of the conducting plate springs 7. Contact conductors 3 insulated each other are bonded to both surfaces of a plug body 2 formed with an insulator, a lead wire is welded to the contact conductors 3 and drawn out so as to be connected to a measuring instrument. On the way to insertion of the measuring plug A, if the measuring instrument is connected to the measuring plug A even during current flow, current only flows as shunt current, and an electric circuit causes no trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block used for electric wiring, which eliminates the trouble of disconnecting a wire for measuring a current, so that a current can be measured even when a circuit is energized. The present invention relates to an electric appliance having a structure as described above.

[0002]

2. Description of the Related Art A conventional terminal block has a structure for simply relaying an electric wire or a structure in which a lock switch is provided at an intermediate position to disconnect an electric circuit. The current is measured by using a meter or by removing the connected wires and connecting measuring instruments in series.

[0003]

SUMMARY OF THE INVENTION When measuring current in an electric circuit, it is necessary to remove the electric wires and connect the measuring instruments in series except for using a through clamp-type ammeter.
It takes time to remove the wire, and if the wire is removed while the current is flowing, the arc may melt the terminal block.Therefore, it is necessary to stop the current and remove the wire once. Measurement is difficult.

According to the present invention, the current of a circuit can be easily measured without a trouble of disconnecting an electric wire connected to a terminal block without a penetrating clamp type ammeter and even when an electric circuit is energized. The purpose is to provide a terminal block that can be used.

[0005]

In order to achieve the above object, in a terminal block according to the present invention, a conductive plate spring is attached to a terminal stopper plate of the terminal block and a plug for measurement is inserted so that the circuit is energized. Even in this case, the measuring instrument can be connected in series to the circuit without damaging the instrument.

In the lead wire of the measuring plug, since there is a limit to the magnitude of the supplied current, those measuring a large current should connect the contact conductor of the measuring plug directly to the military terminal.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. In FIG. 1, a conductive leaf spring 7 large enough to allow a predetermined current to flow through a pair of terminal stoppers 6 is welded to the contact surfaces so as to have a constant surface pressure, and the terminal stoppers 6 can be fixed. To the terminal block B formed as described above. The terminal block B has an insertion hole 4 large enough to allow the measurement plug A to be inserted just above the contact portion of the conductive leaf spring 7.
Is provided.

In the embodiment shown in FIG. 2, insulated contact conductors are adhered to both surfaces of a plug body 2 formed of an insulator, and lead wires are welded to the contact conductors 3 and pulled out, respectively. A measuring instrument can be connected.

In the embodiment shown in FIG. 3, the contact conductor 3 is connected to the conductive leaf spring 7 while the measuring plug A is being inserted.
However, if the measuring instrument is connected to the measuring plug A even when the power is being supplied, the current is simply shunted and there is no problem in the electric circuit.

In the embodiment shown in FIG. 4, the measuring plug A is completely inserted, but the conductive leaf spring 7 is connected to the measuring instrument via the contact conductor 3 to measure the current. Can be done.

In the embodiment shown in FIG. 5, when a large current is measured with the measuring plug A, the contact conductor 3 is directly connected to the military terminal 8 so that a predetermined current can flow, and the military terminal 8 is connected. 8 is connected to a measuring instrument so that a large current can be measured.

[0012]

Since the present invention is configured as described above, it has the following effects.

By attaching a conductive leaf spring to the terminal stopper plate of the terminal block and using it in combination with a measuring plug,
When measuring the current of the electric circuit, the measuring instrument can be connected without disconnecting the electric wires, so that the trouble of removing the electric wires can be omitted.

Further, even in a circuit which is always energized and in which a power failure is difficult, a measuring instrument can be connected in an energized state, so that the current can be easily measured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a terminal block with a current measuring jack.

FIG. 2 is a sectional view of a terminal block with a current measuring jack.

FIG. 3 is a cross-sectional view showing a state in which a measuring plug is being inserted.

FIG. 4 is a cross-sectional view showing a state where the insertion of the measurement plug is completed.

FIG. 5 is a cross-sectional view showing a structure of a measuring plug when measuring a large current.

[Explanation of symbols]

 1 Lead wire 2 Plug body 3 Contact conductor 4 Insertion hole 5 Terminal screw 6 Terminal stopper plate 7 Conductive leaf spring 8 Military terminal 9 Plug body 10 Contact conductor A Measurement plug B Terminal block body C Measurement plug with military terminal

Claims (1)

[Claims] 1. A terminal block attached to a switchboard for relaying electric wires, a terminal block (B) configured to conduct electricity at a contact surface of a conductor, and a measuring instrument connected to a lead wire (1). The terminal block (B) is welded to the terminal stopper plate (6) by switching from the normal current path to the current path passing through the measuring instrument by inserting the plug into a measuring plug (A). The conductive leaf springs (7) are attached to a pair of symmetrical left and right, and the conductive leaf springs (7) are in contact with each other with an area and a surface pressure that do not hinder the passage of a predetermined current. When the plug (A) is not inserted, the left and right terminal stopper plates (6) are electrically connected by the conductive leaf spring (7). However, when the wedge-shaped measuring plug (A) is inserted, a pair of conductive leaf springs ( Immediately before leaving the contact surface of 7), the contact conductor (3) of the measuring plug (A) ), And the measuring instrument is connected via the lead wire (1) connected to the contact conductor (3), so that the electrical connection can be made without removing the electric wire connected to the terminal stopper plate (6). Circuit current can be measured.