JPH0729503Y2 - Power terminal adapter for multi-circuit switch - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Industrial Field of Application) This invention is a multi-circuit switch, which branches a search signal (DC voltage) used to search a fault circuit from a plurality of branch circuits. The present invention relates to a power terminal adapter for accident detection applied to a circuit.

(Prior Art) Conventionally, overhead lines are mainly used as distribution lines, but in recent years, undergrounding of distribution lines has been considered from the viewpoint of urban beautification.
It is certain that underground power distribution will increase in the future.

The current underground power line accident investigation is the 7th after the substation trip.
As shown in Fig. (A), since the underground cable can be attached to and detached from the switch relatively easily, the injection point of the accident exploration signal is located near the multi-circuit switch 30. Customer's retractable switch) H etc. underground cable rising part is selected. It is composed of a power supply device for applying an unillustrated exploration signal (DC voltage) to the supply distribution box (customer retracting switch) H, etc., an exploration device for displaying an accident, and an antenna for detecting an accident abnormality for the exploration signal. Each branch circuit switch S1 to Sn is attached in sequence with the electric-powered accident probe installed and the movable electrode lid K of the main opening / closing switch MS of the multi-circuit switch 3 removed from the power supply side fixed electrode 32a and the load side fixed electrode 34. By performing the opening / closing operation of (n = 1,2,3,4), the search signal (DC voltage) is applied to the cables of each branch circuit A to D, and the fault circuit is detected by the voltage-applied accident probe. is doing. In addition, SS is a substation, and S is an opening / closing part of a customer-use drop switch arranged in each branch circuit.

(Problems to be solved by the invention) However, in the past, a worker for charging electricity was placed in a power distribution box or the like, and a worker for operating each circuit switch S1 to Sn of the multi-circuit switch. Must be placed in the multi-circuit switch 30,
Furthermore, since exploration signals (DC voltage) were applied to each cable, it took a lot of time to install and remove the power-applying device for each phase of each circuit, including the work of attaching and detaching the underground cable to the switch. Was spent.

The present invention has been made to solve the above-mentioned conventional problems, and it is possible to detect an accident section quickly by improving the efficiency of the working time for the applied voltage exploration. It is to provide a charging terminal adapter for a multi-circuit switch which requires a small number of workers.

Configuration of the Invention (Means for Solving the Problems) This invention is capable of being crowned to a pair of guide cylinders for each phase, which are provided on the base of a multi-circuit switch and which house the power supply side and load side electrodes. The bottomed cylindrical insulating cylinder is suspended and supported by a supporting rod having a bottom surface with an operation grip portion on one side, and each phase insulating cylinder facing the fixed electrode on the power source side is A rod-shaped electrode that can be connected to the fixed electrode is arranged in each phase insulating cylinder that constitutes the blind lid and faces the other fixed electrode on the load side, and the connecting conductor connected to this electrode is further supported on the lower surface of the rod. The gist of the present invention is to provide a connecting portion for charging for applying an accident search signal to the tip end portion of the connecting conductor along the operation gripping portion.

(Operation) By mounting the power source terminal adapter for accident detection having the above configuration on the power supply side and load side guide tubes of the main opening / closing switch MS of the multi-circuit switch, which is the branch base point of the multiple circuits, this multi-circuit switch is installed. The probe signal (DC voltage) can be applied only to the load-side fixed electrode of the main opening / closing switch MS, and the probe signal is collectively supplied to each branch circuit.

(Embodiment) Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS.
It will be described with reference to the drawing.

The support rod 2 of the voltage application terminal adapter 1 is made of glass fiber reinforced resin, and its length is one of the lengths when the voltage application terminal adapter 1 is attached to the fixed electrode side of the main switch MS of the multi-circuit switch 30. The handle portion 2a provided on the side is set to project from the main body case 30a of the multi-circuit switch 30, that is, the opening / closing door 35 cannot be closed with respect to the main body case. On the lower surface of the support rod 2, a lid 3 made of an insulating material such as epoxy resin is arranged for each phase.

The lid 3 is composed of a track-shaped mounting plate 4 and a pair of insulating cylinders 5 and 6 each having a bottomed cylindrical shape and supported on the bottom surfaces of both ends of the mounting plate 4 in a hanging state. The length 5 of the insulating cylinder 5 is set shorter than that of the insulating cylinder 6. Then, the lid 3 is screwed onto the pair of suspending members 7 arranged substantially in the center of the mounting plate 4 by screws 8 which are inserted into the supporting rods 2 and are locked to the supporting rods 2. On the other hand, it is fixed obliquely from the orthogonal direction. Insulation cylinder for each phase 5,6
Is the inner diameter of the main opening / closing switch MS provided on the base 31 of the multi-circuit switch 30 for each phase of the power source side guide tube 32 and the load side guide tube 33 as the bus bar side so that it can be crowned. There is. That is, the insulating cylinder 5 corresponds to the power supply side guide cylinder 32, and the insulating cylinder 6 corresponds to the load side guide cylinder 33.

The female rod-shaped electrode 9 is fixed to the inner tops of the insulating cylinders 6 by fixing fittings 10 which are inserted and locked from below to the inner tops of the insulating cylinders 6 so as to hang down. The rod-shaped electrode 9 can be brought into contact with and separated from a load-side fixed electrode 34, which is a male busbar side provided upright in the load-side guide cylinder 33. The bottom of the insulating cylinder 5 is a blind lid for electrical insulation. A connecting conductor 12 having rigidity is provided on the upper part of the fixing bracket 10 with a bolt 11
It is fixed by tightening. And each insulation cylinder 6 for each phase
The surface of the connection conductor 12 led out from is insulated and coated with a synthetic resin or the like, and the tips are spaced apart so as not to interfere with each other, and are extended to the gripping portion 2a side along the support rod 2. The tip is bent downward. A connecting portion 13 for voltage application is provided at the tip of the connecting conductor 12, and a protective cap 14 made of insulating synthetic resin is detachably attached when not in use.

A support tool 15 is fixed to the lower part of the front side of the support rod 2 at the center thereof by a bolt 15a, and the support tool 15 is composed of support pieces 16 and 17 which are superposed in two layers. Both ends of the support pieces 16 and 17 extend in a direction orthogonal to the support rod 2, and the tip ends of the connection conductors 12 of the respective phases are respectively provided between the center portions and both end portions of the support pieces 16 and 17. It is sandwiched. The lead wire 18 for charging is connected to one end of the branch wire 20 of each phase with respect to the charging connection terminal 19 common to each phase, and the connecting conductor 12 of the connecting conductor 12 is provided at the connecting terminal 21 provided at the other end of the branch wire 20. It is detachably attached to the connecting portion 13.

In order to search for an accident section using the charging terminal adapter 1 configured as described above, the multi-circuit switch 30 shown in FIG.
The main open / close switch MS of the main open / close switch MS and the circuit switches S1 to Sn (n = 1,2,3,4) are opened, and the main open / close switch MS of each phase power supply side and load side guide tube 32,33 As opposed to
The charging terminal adapter 1 is covered with the insulating cylinders 5 and 6 of each phase with its operation gripping portion 2a, and the rod-shaped electrodes 9 provided in the insulating cylinders 6 of each phase are connected to the load-side fixed electrodes 34 of each phase. To do. Further, the blind insulating cylinder 5 covers the fixed electrode 32a on the power source side in an insulated state,
Do not expose live parts. Then, the protective cap 14 at the tip of the connecting conductor 12 is removed, and the connecting terminal 21 of the lead wire 18 for charging is connected to the connecting portion 13 as shown in FIG. 7 (b).
Connect the power supply device of the power supply type accident probe (not shown) to the power supply connection terminal.
Connect to 19.

After that, the power application device is operated, and the search signal is collectively applied to the load side of the main opening / closing switch MS, that is, the bus side of each branch circuit switch S1 to S4, and the branch circuits A to D are sequentially provided with antennas and the like. Circuit switch of the corresponding circuit at the same time as making it correspond
S1 to S4 are turned on one after another, the probe is operated based on the detection signal from the antenna, etc., and it is possible to search in which of the branch circuits A to D the fault circuit is occurring with this multi-circuit switch. .

Thus, the charging terminal adapter 1 of the present invention can be easily attached to the main opening / closing switch MS of a multi-circuit switch located at the base point of a plurality of branch circuits. Since the exploration signal can be applied to the circuits all at once, it is possible to omit the work of attaching and detaching the power-applying device to each circuit, which is different from the conventional one, and the work efficiency is significantly improved. Further, since this multi-circuit switch can be used as it is without using the retracting switch arranged in each circuit, the number of workers can be reduced unlike the conventional case.

Furthermore, by constructing the side of the power supply terminal adapter 1 corresponding to the fixed electrode on the power source side with a blind lid, it is possible to prevent the exposure of the electrode portion on the power source side and the inflow of current to the load side during accident investigation work. It can be achieved reliably and the safety at the work site is secured.

The present invention is not limited to the above-described embodiment, and for example, as shown in FIGS. 8 to 10, the lid 3 may be arranged along the support rod 2, or a female rod shape may be used. The electrode 9 may be changed to a male rod-shaped electrode or the like, and may be arbitrarily changed without departing from the spirit of the invention.

(Effect of the Invention) As described in detail above, since the present invention is made of the resin material, it is lightweight and can be easily operated by the handle portion. Also, when this charging terminal adapter is used in a multi-circuit switch, the handle part protrudes beyond the main case of the multi-circuit switch, so the door cannot be closed, and therefore the work status is clearly displayed. be able to. further,
Since the connecting portion of the connecting conductor is bent downward, the lead wire for voltage application can be easily connected.

Also, a safe working condition with the power supply side disconnected is secured by simply covering the fixed electrode of the multi-circuit switch, and the search signal is applied collectively to each branch circuit. As a result, since the multi-circuit switch located at the base point of multiple branch circuits can be used as it is, the number of workers required for accident exploration can be reduced and the work time can be shortened to improve efficiency and the accident circuit can be selected quickly. It has the effect.

[Brief description of drawings]

FIG. 1 is a front sectional view of a power terminal adapter according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side sectional view of the same, and FIG. Partially omitted front view, FIG. 5 is a side cross-sectional view of the multi-circuit switch, FIG. 6 is a side cross-sectional view of the multi-circuit switch with the power-supply terminal adapter attached,
FIG. 7 is an electric circuit diagram showing a power distribution line, FIG. 8 is a front sectional view of a charging terminal adapter of another embodiment, FIG. 9 is a plan view thereof, and FIG. 10 is a side sectional view thereof. 1 ... Charging terminal adapter, 2 ... Support rod, 2a ... Handle part, 3 ... Lid, 5,6 ... Insulating cylinder, 9 ... Rod electrode, 12
...... Connection conductor, 13 ...... Connection part, 18 ...... Lead wire for voltage application,
19 …… voltage connection terminal, 20 …… branch line, 21 …… connecting terminal,
30 …… Multi-circuit switch, 31 …… Base, 32 …… Power supply side guide tube, 33 …… Load side guide tube, 34 …… Bus side fixed electrode, 35…
… Opening and closing door.

Front Page Continuation (72) Yoshiharu Ozawa Inventor Yoshiharu Ozawa 2-56 Sudamachi, Mizuho-ku, Aichi Prefecture Insulator Nihon Honsha Co., Ltd. Inside the factory

Claims (1)

[Scope of utility model registration request] 1. A bottomed cylindrical insulating cylinder capable of being capped with respect to a pair of guide cylinders of each phase having the power source side and load side electrodes arranged on the base of a multi-circuit switch. Each phase insulating cylinder, which has a bottom surface and is suspended and supported by a support rod having an operation grip portion on one side, faces each of the fixed electrodes on the power source side, forms a blind lid on the fixed electrode on the other side. Each of the opposed phase insulating cylinders is provided with a rod-shaped electrode or the like that can be connected to the fixed electrode, and further a connecting conductor connected to this electrode is extended to the operation grip portion side along the lower surface of the support rod, A power-saving terminal adapter for accident detection for a multi-circuit switch, characterized in that a power-supplying connection portion for applying a power supply signal is provided at the tip of the connection conductor.