JPH054443U - Distribution transformer equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Improve safety by facilitating phase identification during installation work and inspection in low voltage side circuit configuration of distribution transformer equipment. [Configuration] Low voltage switch for three phase Single-phase transformer 1 with 4a
a and a single-phase transformer 1b having a single-phase low-voltage switch 4b. The single-phase transformers 1a and 1b are V-connected and connected to the input terminals of the three-phase low-voltage switch 4a and the single-phase low-voltage switch 4b. The output terminal of the three-phase low-voltage switch 4a may be one circuit, or the three-phase low-voltage terminal 5a capable of branching into a plurality of circuits may be connected and the output terminal of the single-phase low-voltage switch 4b may be one circuit, or The single-phase low-voltage terminal 5b capable of branching is connected to a plurality of circuits.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a low-voltage side circuit configuration of distribution transformer equipment.

[0002]

[Prior art]

  Fig. 3 shows an example of conventional transformer equipment for distribution having low voltage terminals of a three-phase circuit and a single-phase circuit. It will be described with reference to FIG. FIG. 3 shows the v-phase terminal of the single-phase transformer 1a and the single-phase transformer 1b. The u-phase terminal of the single-phase transformer 1a is V-connected by the conductor 3 and the conductor 6 Along with the terminal and the v-phase terminal of the single-phase transformer 1b, the input end of the three-phase low-voltage switch 4a Connected to the child. In addition, the output terminal of the three-phase low-voltage switch 4a and the 0 of the single-phase transformer 1b The phase terminal is connected to the low voltage terminal 5c which can be one circuit or can be branched into a plurality of circuits. To be done. FIG. 4 shows another embodiment in which the in-phase terminals of the two three-phase transformers 1c and 1d are After being connected in parallel by conductor 3 and conductor 6, respectively, the terminals of each phase u, v, w , Is connected to the input terminal of the three-phase low-voltage switch 4a. In addition, the three-phase low-voltage switch 4a The 0-phase terminal connected in parallel with the output terminal can be a single circuit or can be divided into multiple circuits. A variable low voltage terminal 5c is connected.

[0003]

[Problems to be solved by the device]

  However, in the conventional low-voltage side circuit configuration, the output terminal that connects the load is a three-phase circuit. When connecting a single-phase load, use the same It had to be connected to the terminal, and the connection was complicated. In addition, during installation work and inspection It became difficult to identify the phase of the and there was a risk of incorrect connection.   Therefore, in the present invention, the three-phase low-voltage terminal and the single-phase low-voltage terminal are separately arranged to allow phase identification. It was made easy.

[0004]

[Means for Solving the Problems]

  According to the first aspect of the invention, the first single-phase transformer is provided with the three-phase low-voltage switch, and the second single-phase transformer is provided. Each single-phase transformer is provided with a single-phase low-voltage switch, and one circuit is provided for the three-phase low-voltage switch. Or a three-phase low-voltage terminal that can be branched into multiple circuits to connect the single-phase low-voltage Connect a single-phase low-voltage terminal to the switch, which can have one circuit or can branch into multiple circuits. It   According to the second aspect of the present invention, the first three-phase transformer is provided with a three-phase low-voltage switch, and the second three-phase transformer is provided. Each three-phase transformer is equipped with a single-phase low-voltage switch, and the three-phase low-voltage switch has one circuit. Or a three-phase low-voltage terminal that can be branched into multiple circuits to connect the single-phase low-voltage Connect a single-phase low-voltage terminal to the switch, which can have one circuit or can branch into multiple circuits. It

[0005]

[Action]

  According to the present invention, the phase identification can be easily performed during the installation work or the inspection, so that there is a risk of incorrect connection. Less likely.

[0006]

【Example】

  An embodiment of the structure of the present invention will be described with reference to FIGS.   FIG. 1 shows that the v-phase terminal of the single-phase transformer 1a and the u-phase terminal of the single-phase transformer 1b conduct with the conductor 3. After being V-connected by the body 6, a single-phase low-voltage open with the v-phase terminal of the single-phase transformer 1b. It is connected to the input terminal of the closing device 4b. In addition, the output terminal of the single-phase low-voltage switch 4b The 0-phase terminal of the phase transformer 1b may be a single circuit or a single circuit capable of branching into multiple circuits. The phase low voltage terminal 5b is connected. Also, the three-phase low-voltage switch 4a on the single-phase transformer 1a Input terminals of the u-phase terminal and v-phase terminal from the single-phase transformer 1b by the conductor 3 and the conductor 6. However, the u-phase terminal is connected from the single-phase transformer 1a. In addition, the three-phase low-voltage switch 4a The output terminal is connected to the low-voltage terminal 5a which can be formed in one circuit or can be branched into a plurality of circuits. Will be continued.   FIG. 2 shows another embodiment in which the terminals of each phase of the two three-phase transformers 1c and 1d are conductors 3. After being connected in parallel by the conductor 6 and one of the three-phase transformers 1c of u, v, w The terminal is connected to the input terminal of the three-phase low-voltage switch 4a. Furthermore, low-voltage switch for three-phase The output terminal of 4a can be a single circuit or a low voltage for three phases that can be branched into a plurality of circuits. The terminal 5a is connected. In addition, the u-phase and v-phase terminals of the other three-phase transformer 1d are single-phase Is connected to the input terminal of the low-voltage switch 4b for single-phase, and the output end of the low-voltage switch 4b for single-phase Single-phase low-voltage end that can be made into one circuit or can be branched into multiple circuits for the child and 0-phase terminals The child 5b is connected.   In addition to the above embodiment, in the case of using two single-phase transformers 1a in FIG. Alternatively, two single-phase transformers 1b may be used. Further in FIG. 2, three phases It is also possible to use a three-wire transformer.

[0007]

[Effect of device]

  According to the present invention, it is easy to distinguish between a three-phase circuit and a single-phase circuit, so there is a risk of incorrect connection. Less likely.

[Brief description of drawings]

FIG. 1 is a structural diagram showing the device of claim 1.

FIG. 2 is a structural diagram showing the device of claim 2;

FIG. 3 is a structural diagram showing an example of the prior art of claim 1.

FIG. 4 is a structural diagram showing another example of the prior art of claim 2.

[Explanation of symbols]

1a Single phase transformer 1b Single phase transformer 1c three-phase transformer 1d three-phase transformer 2 Low voltage terminal 3 conductors 4a Three-phase low-voltage switch 4b Single-phase low-voltage switch 5a Low voltage terminal for three phase 5b Single phase low voltage terminal 5c low voltage terminal 6 conductors

Claims (2)

[Scope of utility model registration request] 1. A first single-phase transformer having a three-phase low-voltage switch and a second single-phase transformer having a single-phase low-voltage switch are provided, and the first and second single-phase transformers are provided. V-connect the container,
1 is connected to the input terminals of the three-phase low-voltage switch and the single-phase low-voltage switch, and is connected to the output terminal of the three-phase low-voltage switch.
A low-voltage terminal for three-phase, which can be formed into a circuit or can be branched into a plurality of circuits, is connected to the output terminal of the low-voltage switch for a single-phase described above, or a low-voltage terminal for single-phase can be connected to a plurality of circuits. Power distribution transformer equipment. 2. A first three-phase transformer having a three-phase low-voltage switch and a second three-phase transformer having a single-phase low-voltage switch are provided, and the first and second three-phase transformers are provided. Connected in parallel to the input terminals of the three-phase low-voltage switch and the single-phase low-voltage switch, and the output terminal of the three-phase low-voltage switch can be one circuit, or branched into multiple circuits A transformer equipment for distribution in which possible low-voltage terminals for three-phase are connected and the output terminal of the low-voltage switch for single-phase can be one circuit, or low-voltage terminals for single-phase that can be branched into a plurality of circuits are connected.