JP2007149586A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker 1 facilitating voltage changeover work, and arrangeable in a small space. <P>SOLUTION: This circuit breaker is characterized in that three load-side terminals 5 are each formed by using a quick connection terminal; a sealing cover 8 is provided for each load-side terminal 5, one of the three load-side terminals 5 is covered with the sealing cover 8, and wires 6 are connected to the two remaining terminals, whereby voltage changeover work can be facilitated, execution of wrong voltage changeover is prevented, safety is secured and the space for its installation can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a circuit breaker having an operation handle for opening and closing an electric circuit on an upper surface of a case, a power supply side terminal provided on one surface of the case, and a load side terminal provided on an opposite surface.

  Conventionally, voltage switching in a circuit breaker has been performed with a conductive bar connected to the circuit breaker. Recently, however, space saving of distribution boards has been desired, circuit breakers have become thinner, and the space for connecting a conductive bar to the circuit breaker has decreased, making it difficult to switch the voltage at the conductive bar. Yes.

Thus, it has been devised that the voltage can be switched within the circuit breaker. One of the power supply side terminals is movable and the voltage is switched by moving the terminal.
2005 Kawamura General Catalog Electric Construction Materials Issued on May 1, 2005 JP 2001-35341 A

  However, in the circuit breaker having the above-described movable terminal, the voltage switching mechanism is arranged inside the case of the circuit breaker. Therefore, when switching the voltage, the circuit breaker is removed from the distribution board. Since the case must be opened and the terminal moved, the workability is poor and troublesome.

  Therefore, the present invention has an object to provide a circuit breaker that can be easily switched in voltage and can be arranged in a space-saving manner, and its structure is configured such that the load-side terminal includes three terminals as fast-connection terminals, The load-side terminal is provided with a sealing cover, and one of the three terminals of the load-side terminal is covered with the sealing cover, and the electric wire is connected to the remaining two terminals.

  Further, the seal cover is provided with a through hole, and a mark is attached to a position facing the through hole of the seal cover in the vicinity of the terminal to enable voltage display.

  In the circuit breaker according to the present invention, the load-side terminal is composed of three terminals with quick-connect terminals, a sealing cover is provided on the load-side terminal, and one of the three terminals is covered with the remaining two terminals. Since the electric wires are connected, voltage switching work can be performed without removing the circuit breaker from the distribution board, and workability can be improved. Since the voltage is not switched by the conductive bar, the space is not required and the distribution board can be miniaturized. Since the terminal is covered with a sealing cover, erroneous connection is eliminated.

  In addition, the sealing cover is provided with a through hole, and a mark is provided at a position facing the through hole of the sealing cover in the vicinity of the terminal to enable voltage display, so that the voltage state can be recognized.

  The objective of providing a circuit breaker that can be switched easily is realized with the minimum number of parts and without increasing the size of the circuit breaker.

  An embodiment of a circuit breaker according to the present invention will be described with reference to the attached drawing of FIG.

  The circuit breaker 1 is provided with an operation handle 3 that opens and closes an electric circuit on the upper surface of a case 2, and a power-side terminal 4 is disposed on one surface of the case 2 and a load-side terminal 5 is disposed on the opposite surface. It can be used for a single-phase three-wire electric circuit, and three terminals of an N pole terminal, an L1 pole terminal, and an L2 pole terminal are provided for each of the power supply side terminal 4 and the load side terminal 5. The load side terminal 5 is composed of a quick connection terminal, and is fixed by a quick connection spring 7 when the electric wire 6 is inserted into the terminal.

  The center terminal of the load side terminal 5 is an N pole terminal 5a, and an L1 pole terminal 5b and an L2 pole terminal 5c are arranged with the N pole terminal 5a interposed therebetween. Further, a movable sealing cover 8 is attached to the surface of the load side terminal 5. The sealing cover 8 covers one of the three-pole terminals, is locked to the side surface of the circuit breaker 1, and is slidable.

  When a voltage of 100 V is selected, the upper or lower terminal (L1 pole terminal 5b, L2 pole terminal 5c) is covered with the sealing cover 8, and is not covered with the central N pole terminal 5a and the sealing cover 8. An electric wire is connected to the L1 pole terminal 5b or the L2 pole terminal 5c. Further, the voltage is switched to 200 V by covering the central N-pole terminal 5a with the sealing cover 8 and connecting the upper and lower terminals (L1 pole terminal 5b, L2 pole terminal 5c).

  The sealing cover 8 is formed to have a size capable of sealing one terminal. For example, as shown in the front view of the terminal shown in FIG. 1, even when the sealing cover 8 is placed between the terminal and the terminal, at least one terminal is formed. Cover a part so that only two of the three terminals are connected.

  From the power supply side terminal 4, all three poles of the N pole terminal 4 a, the L1 pole terminal 4 b and the L2 pole terminal 4 c are energized to the load side terminal 5. Since voltage switching is performed at the load side terminal 5, a sealing cover 8 is attached to a terminal not used for the load side terminal 5 so that an arbitrary voltage can be obtained, and voltage switching is not performed by mistake.

  Since the voltage is switched by attaching the sealing cover 8 to the outside of the case 2 of the circuit breaker 1, the work can be performed without removing the circuit breaker 1 from the distribution board for voltage switching, and the work efficiency is improved. To do.

  Compared to a conventional switchboard that switches the voltage by switching the conductive bar, the space is saved and the cabinet of the switchboard can be made smaller.

  Since the sealing cover 8 for accurately switching the voltage is attached to the outside of the case 2 of the circuit breaker 1, the case 2 can be used with different voltages.

  A through hole 10 is provided in the sealing cover 9. In FIG. 2, notches 11 are provided on the left and right to form through holes 10. 200 V is displayed near one notch 11 and 100 V is displayed near the other notch 11. Further, in the vicinity of the L1 pole terminal 13b and the L2 pole terminal 13c positioned above and below the load side terminal 13 of the circuit breaker 12, a circle is formed at a position facing the notch 11 indicated as 100V of the sealing cover 9. In the vicinity of the N pole terminal, a circle mark 14 is attached at a position opposite to the notch 11 indicated as 200 V of the sealing cover 9, and the current cover of the circuit breaker 12 is covered with the sealing cover 9. Display voltage. For example, when the N pole terminal is covered with the sealing cover 9, the upper and lower L1 pole terminals 13b and L2 pole terminal 13c are connected, and the voltage becomes 200V. The sealing cover 9 is at the position of the N pole terminal, and a circle 14 can be confirmed from the notch 11 displayed as 200V.

  The voltage display is not limited to the notch 11 indicated by the circle 15, and the through-hole may be cut out, or the voltage display characters may be displayed at a position facing the through-hole. In the range which does not deviate from the meaning of this invention, it can change suitably.

  The terminal plate is attached to the outside of the circuit breaker case, and the voltage is switched by restricting the connection to the terminal of the electric wire or conductive bar. The circuit breaker can be manufactured with a simple structure, and the voltage switching work can be facilitated. .

It is explanatory drawing which shows the Example of a circuit breaker. Example 1 It is explanatory drawing which shows the 2nd Example of a circuit breaker. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Case 3 Operation handle 4 Power supply side terminal 4a N pole terminal 4b L1 pole terminal 4c L2 pole terminal 5 Load side terminal 5a N pole terminal 5b L1 pole terminal 5c L2 pole terminal 6 Electric wire 7 Fast connection spring 8 Sealing cover 9 Seal cover 10 Through hole 11 Notch 12 Circuit breaker 13 Load side terminal 13a N pole terminal 13b L1 pole terminal 13c L2 pole terminal 14 Circle mark

Claims (2)

  In a circuit breaker having an operation handle for opening and closing an electric circuit on the upper surface of the case, a power supply side terminal on one surface of the case, and a load side terminal on the opposite surface, the load side terminal has three The terminal is composed of a quick connection terminal, a sealing cover is provided on the load side terminal, and one of the three terminals of the load side terminal is covered with the sealing cover, and the electric wire is connected to the remaining two terminals. Feature circuit breaker.   2. The circuit breaker according to claim 1, wherein a through hole is provided in the sealing cover, and a mark is provided at a position facing the through hole of the sealing cover in the vicinity of the terminal to enable voltage display. Circuit breaker described in.

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