JPH023183Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line divider used for measuring line current.

First, the structure of a conventional electric line splitter and an example of its use will be briefly described with reference to FIG.
Reference numeral 1 denotes a housing made of an electrically insulating material, in which a pair of power-receiving plug terminals 3 and 4 that are plug-connected to a power source 2 and a plug member 6 of an electric load 5 are connected to the housing 1. A pair of power feeding side socket terminals 7, 8 are provided, and a plurality of windows 9, 10 are provided which pass through in a direction perpendicular to this drawing. The plug terminal 3 and socket terminal 7 on one side and the plug terminal 4 and socket terminal 8 on the other side are connected by first and second conductive wires 11 and 12 each having an insulating coating.
In this case, the first conducting wire 11 extends from the plug terminal 3 along the upper sides of each of the first and second windows 9 and 10, and is wired to be connected to the socket terminal 7. , the second conducting wire 12 reaches from the plug terminal 4 to the lower side of the second window 10, is wound around the window 10 a predetermined number of times in a coil shape, and is then pulled out along the lower side of the first window 9, And it is wired to be connected to the socket terminal 8. This electric line splitter is connected between the power source 2 and the electric load 5, and the electric line current is measured by sandwiching the first window 9 or the second window 10 between the split iron core of the clamp type ammeter. In this case, the first window 9 obtains a measurement value with a measurement magnification of “×1”, and the second
In the window 10, a measurement value with a measurement magnification "xn" corresponding to the number of turns of the coil is obtained. In this way, the current in the line to be measured (load current) can be measured using a predetermined measurement magnification.
This had the following drawbacks:

That is, if the measurement magnification is set to, for example, "×1", "×5",
When setting in multiple stages such as "x10",
Three windows corresponding to these measurement magnifications are required, resulting in a large size. In addition, when measuring with the measurement magnification "x1" using the first window 9, there is a risk that the magnetic field from the coil wound around the second window 10 adjacent to the split core of the clamp-type ammeter may act. Because there is
The reliability of the measured values was low.

Therefore, the purpose of the present invention is to provide an electric wire that allows measurement magnification to be selectively set in multiple stages for one window, and enables measurement of the current in the line to be measured at a desired magnification using one window. The purpose of the present invention is to provide a road splitter.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. In this figure, the same reference numerals are used for parts corresponding to those in FIG. 1.

The electrical line splitter according to this invention has a housing 1 made of an electrically insulating material, and the housing 1 is provided with a pair of power receiving side plug terminals 3, 4 and a pair of power feeding side socket terminals 7, 8. The housing 1 is provided with a single window 13 extending through the housing 1 in a direction perpendicular to the drawing in the center thereof. A changeover switch 14 is provided between the plug terminal 4 and the socket terminal 8.

Then, one plug terminal 3 and one socket terminal 7
are connected to each other by a first conducting wire 11 that extends along the upper side of the window 13, and a second conducting wire 12 is connected to a predetermined line around the window 13 from the lower side of the window 13. It is wound into a coil several times, and its starting end is connected to the fixed contact a of the switch 14, and its terminal end is connected to the socket terminal 8. A socket terminal 8 is connected to the fixed contact b of the switch 14 via a third conductive wire 15, and a movable contact c for selectively switching between the fixed contacts a and b is connected to the plug terminal 4.

When this electric line divider is connected between the power supply 2 and the electric load 5 shown in FIG. A current is supplied to the electric load 5 through the conductive wires 11 and 15, and these conductive wires become live. Therefore, window 1 can be measured using a clamp type ammeter.
By sandwiching 3, it is possible to measure the electrical path current at a measurement magnification of "x1". On the other hand, when the movable contact c is brought into contact with the fixed contact a side, the first conducting wire 11 and the second conducting wire 12 become live, so that the number of turns of the coil formed around the window 13 increases. If the corresponding measurement magnification is "xn", for example, the number of turns is "10", then the current in the electrical path to be measured can be measured at the measurement magnification of "x10". In this way, by means of a single window 13, the measuring magnification "×
1” and “×10” measurements are possible. In addition,
By drawing out an intermediate tap from the coil formed by the second conducting wire 12 and configuring it to be selectively switched by the movable contact c, the measurement magnification in the window 13 can be changed in more steps. Also,
The changeover switch 14 is arranged on the socket terminal 8 side, and the movable contact c is connected to the socket terminal 8, and the coil end of the second conductor 12 is connected to the fixed contact a.
Alternatively, one end of the third conductor 15 may be connected to the fixed contact b, and the coil starting end of the second conductor 12 and the other end of the third conductor 15 may be connected to the plug terminal 4. can.

As is clear from the detailed description of the embodiments described above, according to the present invention, the measurement magnification in a single window 13 can be selectively switched, so that the measurement magnification in the single window 13 can be selectively changed. It becomes possible to downsize the shape.

Further, since there is no risk of being affected by the magnetic field from the coils of adjacent windows as in the conventional case, measurement accuracy can be further improved.

[Brief explanation of the drawing]

FIG. 1 is a front view for explaining the general structure of a conventional electric line divider, and FIG. 2 is a front view of the electric line divider according to the present invention. In the figure, 1 is the housing, 3 and 4 are the plug terminals on the power receiving side, 7 and 8 are the socket terminals on the power feeding side, and 11 is the first
12 is a second conducting wire, 13 is a window, 14 is a switch, and 15 is a third conducting wire.

Claims (1)

[Scope of utility model registration request] A housing having a window installed through the housing, a pair of power receiving side terminals and a pair of power feeding side terminals attached to the housing, and a wire that is wired along one side of the window and between one of the power receiving side terminals and the power feeding side terminals. and a second conductive wire wound around the window in a coil shape and connected between the other terminals of the power receiving side and the power feeding side. , a third conducting wire wired so as to be selectively connected between the other terminals of the power receiving side and the power feeding side through the side of the window opposite to the first conducting wire; A power line splitter comprising: a switching means for selectively connecting a conducting wire and the second conducting wire between the other terminals on the power receiving side and the power feeding side.