JPH074604Y2 - Power supply for electric circuit check - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a power supply device for checking an electric circuit, which is used, for example, for checking electric wiring in each dwelling unit in a housing complex and for checking performance of fans and the like. .

[Conventional technology]

Conventionally, in the construction of an apartment house, lighting equipment in each dwelling unit,
A check to see if the electric circuits for heating equipment, ventilation fans, air conditioning equipment, etc. were properly wired was done after the completion of interior finishing for all units. That is, in the case of building an apartment house, the electric power is supplied to each dwelling unit by the electric power company when the interior finishing of all dwelling units is completed. More specifically, each dwelling unit already had a distribution board (owned by the resident) installed at the time of interior finishing work, but did not yet have an electricity meter (owned by the power company). Absent. After the interior finishing of all dwelling units is completed, the watt-hour meter is attached to each dwelling unit by the hand of the electric power company, the distribution board and the electric main line are connected through the watt-hour meter, and Power supply will be started. Conventionally, the electrical wiring of each dwelling unit was checked using the power source supplied from this electric power company.

[Problems to be solved by the invention] As described above, in the past, since the electrical wiring check of each dwelling unit is performed after the interior finish of all the units is completed, the work is concentrated immediately before the completion, and the work amount is reduced. Becomes too large, especially
If the wiring in the room is found to be defective as a result of the check, it is necessary to peel off the cloth for finishing the interior or the ceiling plate and rewire the wiring. It becomes complicated.

By the way, for buildings such as apartment houses and office buildings, a temporary power outlet for construction is provided in each room so that interior finishing can be done using electric tools and temporary lighting during construction. It is normal that

The temporary power supply for this construction is a single-phase, two-wire type AC 100V.

On the other hand, as an electric wiring circuit for each dwelling unit, in addition to 100 V AC for ordinary lighting equipment, 200 V AC is required as a power source for large-scale air-conditioning equipment, etc., so single-phase three-wire wiring is used.

The present invention has been made with the above points in mind, and it is possible to check a single-phase, three-wire electrical circuit by using a temporary power supply for construction that is a single-phase, two-wire, 100 V AC. Accordingly, an electric circuit check power supply device is provided which can perform an electric circuit check according to the finish of each dwelling unit and eliminate the work concentration immediately before completion.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, the power supply device for checking an electric circuit according to the present invention comprises an input plug which can be connected to an outlet of a single-phase two-wire type temporary power supply for construction, and a primary side which is a single-phase two-wire type and a secondary side. A single-phase compound winding transformer having a single-phase three-wire system, a single-phase three-wire output connector connected to the secondary side of the transformer, and a breaker interposed before and after the transformer. It is a thing.

[Action]

Bring the above power supply device to each dwelling unit, connect the input plug to the outlet of the temporary power supply for construction, and connect the output connection tool to the distribution panel of the dwelling unit to connect to the distribution panel 100V AC and 200V AC to outlets
Can be supplied with electricity.

Therefore, before the electric power supply to each dwelling unit is started, in other words, it is possible to start checking the electric wiring of each dwelling unit without waiting for the completion of the interior finishing of all the units. .

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the whole power supply device for checking an electric circuit according to the present invention, and FIG. 2 shows a circuit diagram of the power supply device. In the figure, reference numeral 1 denotes an entire apparatus including a box portion 1a with a handle 3 having a fixed caster 2a at a rear portion and a free caster 2b at a front portion, and an openable top plate portion 1b. The box portion 1a of the apparatus main body 1 has vent holes made of punching metal on both side surfaces, and inside thereof is a single-phase compound winding transformer having a single-phase two-wire primary side and a single-phase three-wire secondary side (specifically, Specifically, 100 / 210-
105V 500VA Class A dry type single phase compound winding is used. ) 4
And breakers 5a, 5b interposed before and after that are housed. As the breaker 5a, specifically, 2P 30 /
10AT is used, and breaker 5b is 3p 30 /
5AT is used. Further, on the upper surface plate portion 1b of the apparatus main body 1, a voltmeter V, two ammeters A ₁ and A ₂ , a switch SW for switching to the voltmeter V, pilot lamps PL and R.
A terminal 8 for a megger test (insulation test) in which the phase is red, the N phase is red, the T phase is red, and the earth E is black is attached. In addition, an opening / closing door is provided on the front surface of the box portion 1a of the apparatus body 1.
A cable storage chamber 9 having 9a is formed, and an input plug (specifically, 2P 125V 15A, which can be connected to an outlet of a single-phase two-wire construction temporary power source is formed in the cable storage chamber 9).
I am using a grounded plug. ) A plug cable 11 of about 10 and 3 m, and a single-phase three-wire output connector connected to the secondary side of the transformer 4 (specifically, R phase is red, N phase is black, T phase is The charging clip with an insulating cover for 50A, in which red is red and earth E is black, is used.) 12a, 12b,
12c, 12d and 3m cable 13a, 1 for handling them
3b, 13c and 13d are stored. 14 exchanges as needed
This is an outlet for directly taking out the 100V single-phase two-wire temporary power supply for construction, and is provided in front of the box 1a of the apparatus body 1. F ₁ is a fuse for protecting the pilot lamp PL, and F ₂ and F ₃ are fuses for protecting the voltmeter V. 15a and 15b are openings for operating the breakers 5a and 5b,
Reference numeral 16 is a stopper for fixing the upper surface plate portion 1a in a closed state.

Next, a method of using the above power supply device will be described.

For example, in a multi-story building such as a multi-story house where the interior finish is sequentially applied from the lower floor to the upper floor, while the interior finish is not yet completed, the above power supply device is brought into each dwelling unit to output the power. Insulate the earth E and R phase N phase, T phase of the terminal 8 with a mega tester (not shown) in the state that the connecting tools 12a, 12b, 12c, 12d are connected to the distribution board of the dwelling unit. Inspect the resistance (good / bad insulation).

If the inspection result of the insulation resistance is acceptable, connect the plug 10 to the outlet (not shown) of the temporary power supply for construction, and
Turn on the breakers 5a and 5b to supply power to the electrical wiring after the distribution board.In this state, the electrical circuits for outlets and lighting equipment in the room, kitchen equipment, ventilation fans and air conditioning equipment, etc. Check if the wiring is correct.
In this case, whether or not a fan such as a ventilation fan is moving can be confirmed by holding the intake port or the exhaust port with a hand and checking for the presence or absence of wind. In the above embodiment, the ammeter A ₁ , A ₂ is incorporated, the performance of the fan is designed as designed based on the correlation between the air volume and the current value of the fan, which is known in advance, by observing the deflection of the needle of the ammeter A ₁ , A _2. It is possible to confirm whether or not it is exerting.

In addition, since the breakers 5a and 5b are provided before and after the transformer 4, not only the electric wiring on the temporary power supply side for construction and the indoor side and the transformer 4 are protected, but also a small capacity transformer 4 can be used. This will contribute to weight reduction of the device.

In the above embodiment, the caster is attached to the device main body 1 in order to facilitate the movement of the power supply device. However, the caster is omitted and the device main body 1 is mounted on another trolley for use. Good. Further, the terminal 8 may be omitted. In this case, the insulation resistance inspection is performed by directly connecting the mega tester to the distribution board as in the conventional case.

[Effect of device]

Since the present invention is configured as described above, it is possible to perform a single-phase, three-wire type electric circuit check by using a temporary power supply for construction, which is a single-phase, two-wire type, AC 100V. That is, for example, in the construction of an apartment house, before the power supply to each dwelling unit is started from the electric power company, the input plug is connected to the outlet of the temporary work power supply for construction installed in each dwelling unit, and the output connection is made. By connecting the equipment to the distribution board of the dwelling unit, AC 100V can be supplied to the two types of outlets connected to the distribution board.
It is possible to supply electricity of AC 200V and check the electrical wiring of the dwelling unit.

Therefore, it is possible to start checking the electrical wiring of each dwelling unit before the power supply to each dwelling unit is started by the power company, in other words, without waiting for the completion of the interior finishing of all the units. Since the electric circuit can be checked according to the finish of each dwelling unit, the work concentration just before the completion can be eliminated.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of a power supply device for checking an electric circuit, and FIG. 2 is an electric circuit diagram of the device. 1 ... Device body, 4 ... Transformer, 5a, 5b ... Breaker, 10
… Plugs, 12a, 12b, 12b, 12c… Connectors for output.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Oyama 4-1-1-13 Honmachi, Chuo-ku, Osaka City, Osaka Prefecture Takenaka Corporation, Osaka Main Store (72) Inventor Shigeki Inui 4 Honmachi, Chuo-ku, Osaka City, Osaka Prefecture 1-13 No. Takenaka Corporation, Osaka Main Store (72) Inventor: Koji Yamamoto 4-3-7 Koraibashi, Chuo-ku, Osaka City, Osaka Toko Electric Works Co., Ltd. Kansai Branch Office

Claims (1)

[Scope of utility model registration request] 1. An apparatus main body, an input plug connectable to an outlet of a single-phase two-wire type temporary power supply for construction, and a single-sided single-phase two-wire type primary side and a single-phase three-wire type secondary side. A power supply device for checking an electric circuit, comprising: a phase / double-winding transformer; a single-phase / three-wire output connecting device connected to the secondary side of the transformer; and a breaker interposed before and after the transformer.