JPH087614Y2 - Wire cap - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wire cap that is inserted into the end portion of an electric wire for connecting to a terminal portion of a breaker of a small capacity with an allowable current of about 120A. is there.

[Conventional technology]

This type of conventional wire cap has a structure that wraps the end part of the wire so that the end part of the wire does not loosen, and the wire cap is inserted into the end part of the wire and connected to the terminal part of the breaker, for example. To use.

Therefore, when measuring the load current flowing through a breaker, etc., measure the current by grasping the wire cap inserted through the end of the wire connected to the terminal of the breaker by the clamp provided on the measurement terminal of the ammeter. In addition, the electric wire was removed from the terminal of a breaker or the like, and a through-type current transformer was inserted to measure the current.

[Problems to be solved by the device]

Since the conventional wire cap is configured as described above, when connecting the electric wire with the wire cap inserted to the terminal part of the breaker provided in the distribution board or the distribution board, the inside of the distribution board or the distribution board is not The space is small and it is very difficult to grasp the wire by the clamp for measuring the load current. Further, there is a problem in that the load connected to the distribution board or the distribution board must be temporarily interrupted when the electric wire is removed and the current is measured by the penetration type current transformer.

The present invention has been made to solve the above problems, and an object thereof is to provide a wire cap capable of measuring a load current of a breaker or the like without causing a small space and a power failure.

[Means for solving the problem]

A wire cap according to the present invention is formed integrally with a terminal cap that covers a core wire of an electric wire and is held together with the core wire by pressing a terminal of an electric device in a distribution board or a distribution board. A cap provided with a holder provided on the outer periphery of the end on the insulating coating side, and a current transformer core provided in the holder and wound with a secondary winding for detecting a current flowing in the terminal cap. Is.

[Action]

The wire cap in this invention is provided with a current transformer core in which a secondary winding is wound around the terminal cap through which a current flows, so that the current flowing through the terminal cap can be detected immediately without causing a power failure in the secondary winding. it can.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG. 2 is a front view showing an example of the usage state of FIG. 1, in which 1 is an insulated wire and 2 is an insulated wire 1. The core wire 2 is exposed by peeling the insulating coating 3 from the insulated wire 1. Reference numeral 4 is a metal terminal cap that covers the core wire 2. The terminal cap 4 is for omitting the treatment of the core wire 2 at the end of the insulated wire 1 and facilitating connection with an electric device. Reference numeral 5 denotes a synthetic resin holder provided at the boundary between the terminal cap 4 and the insulating coating 3. The holder 5 is formed integrally with the terminal cap 4, and the insulated wire 1 is attached to the holder 5. Penetrates. Reference numeral 6 denotes a current transformer core fitted between an inner wall 5a and an outer wall 5b projectingly provided in the holder 5, and the current transformer core 6 has a permissible current of about 120A, and therefore has a diameter of 2 to 2. It is about 3 cm. 7
Is a secondary winding around which the current transformer core 6 is wound, 8 is a load resistance connected to both ends of the secondary winding 7, and 9 is an inner cylinder for fixing the holder 4 to the insulated wire 1. is there.

Therefore, in order to measure the load current of the breaker 10, a current transformer having a current detection function including a holder 5, which is integrally formed with the terminal cap 4, a current transformer core 6, a secondary winding 7 and a load resistor 8. If the device is attached to the insulated electric wire 1 and then the terminal cap 4 of the insulated electric wire 1 is attached to the terminal portion 10a of the breaker 10, the core wire 2 of the insulated electric wire 1 and the terminal cap 4 are separated by pressing the screw of the terminal portion 10a. As a result of being fixed, the positions of the holders 5 of the three wires are aligned at the same position as shown in FIG. Further, by connecting a voltmeter 11 to both ends of the secondary winding 7, the load current flowing through the breaker 10 can be measured. That is, the current flowing through the terminal cap 4 of the insulated wire 1 is detected by the secondary winding 7 via the current transformer core 6 and is passed through the load resistor 8, so that the potential difference across the load resistor 8 is detected by the voltmeter 11. The voltage can be measured.

[Effect of device]

As described above, according to the present invention, the terminal cap that covers the core wire of the electric wire and is held together with the core wire by pressing the terminal of the electric device in the distribution board or the distribution board is integrally formed with the terminal cap. , A holder provided on the outer periphery of the end of the end cap on the insulating coating side, and a current transformer core provided in the holder and wound with a secondary winding for detecting a current flowing in the end cap. Since the configuration is provided, the current can be measured without the power failure, and thus the current can be easily measured. In addition, the terminal cap, the current transformer core, and the holder are integrated to reduce the mounting space, and the positions of the current transformer core and the holder can be fixed according to the length of the terminal cap. The installation space can be reduced and the appearance can be improved.
Further, the center of the terminal cap and the center of the current transformer core are not displaced, and the current detection accuracy by the current transformer core can be improved. Furthermore, the coating of the core wire of the electric wire is peeled off, the terminal cap is inserted into the core wire, and the work of pressing the terminal cap by the terminal of the electric device is sufficient.
There is an effect that it can be assembled very easily, the coating of the electric wire is not damaged, and there is no fear of electric leakage.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a wire cap according to the present invention, and FIG. 2 is a front view showing a use state in which the wire cap shown in FIG. 1 is attached to a breaker. 1 ... Insulated wire, 2 ... Core wire, 4 ... Terminal cap, 5
...... Holder, 6 ... Current transformer core, 7 ... Secondary winding.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Takeuchi 1 Kibukicho, Kasugai-shi, Aichi Chubu Seiki Co., Ltd. (72) Inventor Takahiro Niwa 1 Kibuki-cho, Kasugai-shi, Aichi Chubu Seiki Co., Ltd. (72) 56) References Japanese Patent Laid-Open No. 61-267308 (JP, A) Actually developed 64-23879 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A terminal cap which covers a core wire of an electric wire and is held together with the core wire by pressing a terminal of an electric device in a distribution board or a distribution board, and an insulation of the terminal cap formed integrally with the terminal cap. A wire cap comprising: a holder provided on the outer periphery of the end on the coating side; and a current transformer core provided in the holder and wound with a secondary winding that detects a current flowing through the terminal cap.