JPH02181406A - Stacked transformer - Google Patents

Abstract

PURPOSE:To make the depth dimension of a transformer panel small so as to facilitate inspection and work efficiency of the change-over of taps by putting the upper part of a unit transformer at the lower stage and the switch connection side end parts of first and second connection conductors of a unit transformer at the upper stage respectively in the specified positions. CONSTITUTION:A plurality of unit transformers 22 at the lower stage and a plurality of unit transformers 28 at the upper stage are stacked inside a transformer panel 1, and primary side lead parts 27a-27c and 33a-33c are arranged respectively. Load switches 34 and 37, which have terminals 36a-36c and 39a-38c in correspondence with these respective lead parts 27a-27c and 33a-33c, are installed in the positions near to upper left and right side parts of a transformer panel 1. The first set of connection conductors 40 are arranged in plural stages above the transformers 22 and such that they extend in horizontal direction, and the end parts are connected to the terminal parts 39a-39c of the switch 37, while the second set of connection conductors 47 extending horizontally in plural stages are arranged above the transformers 28, and their ends are connected to the terminals 36a-36c of the switch 34.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a stacked transformer in which unit transformers are stacked in two stages within a transformer panel.

(Conventional technology) The electrical distribution equipment in the building is air conditioning equipment and lighting equipment.

Due to the automation of other equipment and the installation of various types of office equipment, the capacity is increasing, and high-voltage, large-capacity transformers are being used from the economic standpoint. On the other hand, there is a desire to reduce the installation area of power distribution equipment in order to make it easier to transport the power distribution equipment and to make effective use of the floor space of buildings. For this reason, instead of installing one large-capacity full-voltage transformer, multiple small-capacity unit transformers are stacked in a transformer panel to supply power to each optical load. There is. This conventional example is shown in Figures 3 and 4.
As shown in the figure. That is, 1 is a transformer panel, 2 is an upper unit transformer fixed to the bottom of the transformer panel 1, and this is a
It consists of a transformer main body 3 with three coils 3b wound around the transformer main body 3, and a support frame 4 fitted and attached to the outer peripheral part of the transformer main body 3 on the inner peripheral part thereof, and the left-hand part from the center of the upper end part. Three primary side terminals 5 are attached to each coil 3b.

An upper unit transformer 6 is stacked on the upper surface of the lower intermediate transformer 2, which has three coils 7b on an iron core 7a.
It consists of a transformer body 7 wrapped with a transformer body 7, and a support frame 8 fitted inside the outer circumference of the transformer body 7, and connected to each coil 7b in the right half from the center of the upper end. Three primary side terminals 9 are attached. At the upper part of the transformer panel 1, a negative dot switch 10 for the upper unit transformer 6 is installed, located on the right half of the center. In this load switch 10, three terminals 10a at the top are connected via cables 11 to three common busbars 12 for power reception arranged on the top surface of the transformer panel 1, and a 301M terminal 10b at the bottom. are connected to three primary side terminals 9 of the upper unit transformer 6 via a cable 13.

A 6:j switch 14 for the lower lli transformer 2 is attached to the upper left hand part of the transformer panel 1, and the three upper terminals 14a are connected to the common bus 12 for power reception via a cable 15.
The lower three terminals 14b are connected to the three primary terminals 5 of the lower unit transformer 2 via a cable 16 that hangs down from the front of the coil 7b of the upper unit transformer 6. . The intermediate portion of the cable 16 is supported by an intermediate terminal 18 attached to the upper part of the upper 111 transformer 6 at a position 11e to the left of the center thereof. Reference numeral 17 denotes a lead-in cable connected to the common wire 12 for power reception.

(Problems to be Solved by the Invention) The above-described configuration has the following problems. First, although the depth dimension of the coil 7b of the intermediate transformer 6 is larger than other parts, in the above configuration, the primary terminal 5 of the lower ζF transformer 2 and the load switch 14 The cable 16 connecting the coil 7b of the upper unit transformer 6
Since it passes through the front surface of the transformer panel 1, the depth dimension of the transformer panel 1 becomes even larger, and it is impossible to make the transformer panel 1 thinner. Second, since the cable 16 appears to block the front surface of the coil 7b of the upper qi transformer 6, inspection work of the upper +11-voltage transformer 6 and the tap of the tap changer 7C of the coil 7b are difficult. EIJ replacement work is difficult to do. Furthermore, these operations must be carried out with the load switches 14 of the two upper intermediate transformers turned off. Third, the upper unit transformer 6
Even when only the transformer panel 1 is to be carried out of the transformer panel 1, the cable 16 for the lower unit transformer 2 must be disconnected.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to make the transformer panel thinner, to facilitate inspection work and tap switching work, and to provide cables for lower unit transformers. An object of the present invention is to provide a stacked transformer in which the upper unit transformer can be easily removed from the transformer panel without disconnecting or disconnecting the transformer.

[Structure of the Invention] (Means for Solving the Problems) The stacked transformer of the present invention has two switches installed at positions close to the left and right sides of the upper part of the transformer panel, and ll1
The upper part of the unit transformer extends horizontally in several stages with upper and lower scales, and the end that connects to the switch protrudes to one side from the coil of the upper unit transformer, and the lower the unit transformer, the more The first set of connecting conductors located on the side side are arranged above the unit transformer in the upper stage in multiple stages above and below. A second set of connecting conductors located on the other side is arranged, and the ends of the first set of connecting conductors on the coil connection side are connected to the lead-out portion of the lower unit transformer, and the ends on the switch connection side is connected to the terminal part of one of the switches located above it, and the coil connection side end of the second set of connecting conductors is connected to the lead part of the upper unit transformer, and the switch connection side end is connected to the terminal part of the second set of connecting conductors. The feature is that it is connected to the terminal section of the other switch located above.

(Function) According to the stacked transformer of the present invention, the primary side of the lower unit total voltage is connected to the coil of the upper unit transformer on one side via the first set of connection conductors arranged horizontally in the upper part. The primary side of the unit transformer in the upper stage is connected to the switch located above it from the side side of the Since it is connected to the switch located at the top and bottom, the front sides of the coils of the Qj transformers in the upper and lower stages are opened. In addition, since the end portions of the first and second sets of connection conductors on the switch connection side are located closer to the side of the lower conductor, the multiple cables connected to the terminal portion of each switch can be Since they are arranged side by side, the depth of the transformer panel becomes smaller.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 21 is a full-pressure device panel, of which only the outer shape is schematically shown. At the bottom of this transformer panel 21, a lower unit full voltage transformer 22 is placed. This unit transformer 22 includes a transformer main body 25 in which three coils 24 are wound around an iron core 23, and a rectangular frame-shaped support frame 26 that is fitted and fixed to the outer periphery of the transformer main body 25.
Wheels 26a and 2 are mounted on the bottom of the support frame 26.
6a is attached to the bottom surface of the transformer panel 21 by a fixing device (not shown). These coils 24
A tap changer 24a is provided on the outer periphery of each coil 24, and lead wires 27a, 27b, and 27c are drawn out from the top of each coil 24 as a primary side lead part. The upper unit transformer 28 is located on the upper surface of this lower unit transformer 22.
The transformer main body 31 is constructed by winding three coils 30 around an iron core 29, and the support frame 32 is fitted and fixed to the outer periphery of the transformer main body 31.

A tap changer 30a is provided on the outer periphery of each coil 30, and lead wires 33a, 33b, and 33c are drawn out from the upper part of each coil 30 as a primary side lead part. A load switch 34 for the upper unit transformer 28 is attached to the upper part of the transformer panel 21 to the right of the center thereof. The load switch 34 is provided with three terminal portions 35a to 35c and 36a to 36c at the upper and lower ends, respectively. Similarly, transformer panel 2
The lower unit transformer 22 Jrl is located in the upper left part of 1.
A load switch 37 is attached, and three terminal portions 38a to 38c and 39a to 39c are provided at the upper end and the lower end, respectively. A first set of connection conductors 40 is provided above the lower unit transformer 22 . This connecting conductor 40 is composed of an upper connecting conductor 41, an intermediate connecting conductor 42, and a lower connecting conductor 43, which are arranged in multiple upper and lower stages, for example, three stages, and extend in the horizontal direction. These connecting conductors 41.
42° and 43 are connected to the lead wires 27a, 27b, and 27c of the lower stage transformer 22 and 24, respectively. It is connected.

In addition, the switch connection side end 4 of the connection conductor 41, 42, 43
1b is the coil 3 of the unit transformer 28 of the upper stage as it is lower.
Terminal parts 39a, 39b, 39 at the lower end of the load opening/closing 2'' 137 that protrudes leftward from 0 and is located above it.
c via cables 44, 45° 46. A second set of connecting conductors 4 is connected to the upper part of the upper unit transformer 28.
7 is provided. This connecting conductor 47 also has an upper connecting conductor 48 that has multiple upper and lower stages, for example, three stages, and extends in the water direction.
It is composed of an intermediate connection conductor 49 and an upper connection conductor 50. These connection conductors 48, 49, 50 have coil connection side ends 48a, 4Qa, located on the left side in FIG.
The higher the 50a is, the more leftward it is located, and the lead wires 33a, 33b, 3 of the coil 30 of the intermediate transformer 28 in the upper stage.
Connected to 3c.

Further, the lower switch connecting end portions 48b, 4Qb, and 50b are located on the right side, and are connected to the lower end portion of the load switch 34 located above. Reference numerals 54 to 56 are busbars for power reception, which are horizontally attached to the upper surface of the full-voltage device panel 21 via insulators 57 at positions above the load switches 37 and 34, and the load switches 37 and 34 are installed in the center. U-shaped hanging parts 54a to 56a are formed so as to be located in the middle part of. Cables 58 and 59 are connected to the bus bar 54.
Terminals 38 at the upper ends of load switches 37 and 34 through
a and 35a are connected, the terminals 38b and 35b at the upper end of the negative 6:i switches 37 and 34 are connected to the busbar 55 via cables 60 and 61, and the busbar 56 is connected to the load via cables 62 and 63. It is connected to terminal portions 38c and 35c at the upper ends of switches 37 and 34. In addition, 64
are the hanging portions 54a to 56a of the power receiving bus bars 54 to 56.
The distance 1t is fixed between the two sides of . 65 to 67 are lead-in cables, these are power receiving busbars 54 to 56.
It is connected to terminal portions 54b to 56b attached to the end portions of the hanging portions 54a to 56a.

According to the above embodiment having such a configuration, the first set of connecting conductors 4
0 is the coil 30.2 of the upper and lower 1-unit transformer 28.22
4, extending horizontally to the upper unit transformer 2
The connection conductor 40 protrudes leftward from the coil 30 of No.
and this connecting conductor 40 and the terminal portion 39a of the load switch 37
The cables 44 to 46 connecting between n and 39C no longer block the front surface of the coil 30 of the upper unit transformer 28. As a result, the front surface of the coil 30 is opened, so that inspection of the upper intermediate transformer 28 and switching of the tap switching W30a can be carried out without any problems.

In addition, the connecting conductors 40 and 47 of each set are arranged in several stages vertically, and are connected to the load switch 37, 34 by dividing them into the left side Jj of the coil 24 and the right side of the coil 30, so that each connection Conductor 40 and negative Gj switch 37.34
The cables 44 to 46 and 51 to 53 connecting between the terminal portions 39a to 39c and 36a to 36c are arranged in a substantially planar shape, and the depth dimension of the transformer panel 21 can be reduced, making it thinner. I will try to do 1.

Furthermore, when carrying out the upper unit transformer 28 out of the transformer panel 21, there is no need to remove the cables 44 to 46 for the lower unit transformer 22. Further, in the transformer panel 21, the hanging parts 54a to 56a of the busbars 54 to 56 are arranged using the space created between the negative 6;j switches 34 and 37, and these hanging parts 54a to Terminal part 54 of 56a
Drop-in cables 65 to 67 connected to b to 56b
Since the transformer panel 21 is arranged so that the left and right width dimensions of the transformer panel 21 are not so large compared to the conventional case.

[Effects of the Invention] As is clear from the above description, the stacked transformer of the present invention connects the switch connection side end of the first set of connection conductors at the upper part of the lower unit transformer to the upper unit transformer. The lower coils are positioned closer to one side than the other and connected to the terminals of one switch, and the second set of connection conductors on the upper part of the upper unit transformer are connected to the terminals of one switch. Since the lower end of the switch connection side is positioned closer to the other side and connected to the terminal of the switch, the depth of the transformer panel can be reduced, resulting in a thinner transformer panel. This has the effect that inspection work and tap switching work can be done on the container, and that the upper unit transformer can be easily carried out without disconnecting the cable of the lower unit transformer.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a city view, Figure 2 being a side view, and Figures 3 and 4 being a side view.
The figures are equivalent to FIGS. 1 and 2 of the conventional example. In the figure, 21 is the transformer panel, 22 is the lower unit transformer, 2
7a, 27b, 27c, 33a, 33b. 33c is a lead wire (-next side lead part), 28 is an upper unit transformer, 34.37 is a load switch, 36a, 36b,
36c, 39a, 39b, 39c are terminal parts, 40 is a first set of connection conductors, 41a, 42a, 43a are coil side ends, 41b, 42b, 43b are switch connection side ends, 47
48a, 49a, and 50a are coil side ends, and 48b, 49b, and 50b are switch connection side ends.

Claims (1)

[Claims] 1. A transformer panel, upper and lower unit transformers stacked in this transformer panel each having a plurality of primary side outlets, and corresponding to each of these unit transformers an upper part of the transformer panel. Two switches are installed near the left and right side surfaces and have terminal portions corresponding to the outlet portions, and two switches are arranged above and below the lower unit transformer so as to extend horizontally in multiple stages. a first set of connecting conductors whose end portions connected to the switch protrude to one side from the coils of the upper unit transformers, and the lower unit transformers are located further to the side; The second transformer is arranged in multiple stages above and below the upper unit transformer and extends horizontally, and the lower the end of the unit connected to the switch, the further the second transformer is located on the other side.
and a coil connection side end of the first set of connection conductors is connected to the outlet of the lower unit transformer, and the switch connection side end is arranged above it. Connect to the terminal part of one switch, and connect the coil connection side end of the second set of connection conductors to the lead part of the upper unit transformer, and place the switch connection side end above it. 1. A stacked transformer, characterized in that it is connected to a terminal part of the other switch.