JPH0511706U - Spot network power receiving equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a spot network power receiving equipment capable of reducing the installation space and widening the protection range against a short circuit accident. [Structure] A disconnector case 8 accommodating a primary disconnector is directly connected to an upper side surface of the network transformer 7, and is connected to a secondary terminal of the transformer 7 directly below the disconnector case 8. A fuse storage box 11 for storing the protected protector fuse is arranged, and is connected to the front side of the transformer 7 by a protector board 15 storing the protector breaker and a network bus bar 19 from the breaker. The take-off boards 16 accommodating the take-off devices are installed in a row so that their rear surfaces face the transformers 7, and the transformers 7 and the protector boards 15 are connected by the fuse housing box 11.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a spot network power receiving facility suitable for power receiving and distributing facilities for buildings.

[0002]

[Prior Art]

 Generally, in the case of low voltage, the spot network power receiving equipment connects the primary disconnector, network transformer, protector fuse and protector circuit breaker in order to the distribution line of 2 to 4 lines respectively. It is configured to connect in parallel with a power bus and to distribute power from this bus to the load through a take-off device.

Conventionally, in an electric room such as in a building, as shown in FIGS. 7 and 8, the network transformers 1 provided for the respective lines are arranged side by side on the left and right sides. While the primary disconnector is housed in the disconnector case 2 directly connected to and the receiving wire 3 is drawn into this, the protector panel 4 and the protector panel 4 are separated from the transformer 1 by at least the space for maintenance and inspection. A plurality of take-off boards 5 are installed in a row, and the secondary side of the transformer 1 is connected to a protector fuse in the protector board 4 by a conductor housed in a bus duct 6, and a protector breaker in the protector board 4 is connected. The take-off device in each take-off board 5 supplies electric power to each load via a take-off device in each take-off board 5.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the network transformer 1 which is an extra-high-priced device and the boards 4 and 5 which are low-voltage boards are separately arranged, they are occupied spaces as power receiving equipment. However, there is a problem that the space becomes very large and the size of the electric room in the building becomes large.

Further, in this type of spot network power receiving equipment, it is difficult to protect against a short-circuit accident between the secondary terminal of the network transformer 1 and the protector fuse. However, in the conventional case, since the protector fuses are arranged in the protector panel 4 which is remote from the transformer 1, the distance between the transformer 1 and the protector fuses is very long. However, the scope of protection against short-circuit accidents becomes extremely narrow, and reliability decreases.

The present invention has been made in view of the above problems of the conventional technology. The purpose of the present invention is to reduce the installation space and to prevent a short circuit accident. It is to provide a spot network power receiving facility that can broaden the protection range.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the spot network power receiving equipment of the present invention, a disconnector case containing a primary disconnector is directly connected to the upper side surface of the network transformer, and the disconnector case is connected to the disconnector case. -A fuse housing box that houses the protector fuse connected to the secondary terminal of the transformer is placed immediately below the transformer, and the protector panel that houses the protector breaker and this breaker are located in front of the transformer. The take-off boards, which house the take-off devices that are branched and connected to the network bus from, are installed side by side with the rear of each facing the transformer, and the transformer and protector board are connected by the fuse storage box. It was done.

[0008]

[Action]

 According to the above configuration, the disconnector case containing the primary disconnector and the fuse storage box containing the protector fuses are arranged above and below the side surface of the network transformer, respectively. The protector panel containing the protector circuit breaker and the take-off panel containing the take-off device are installed in a row on the front of the transformer, and each is integrated as a front maintenance structure, reducing the installation space. It will be possible.

Further, since the fuse box is directly connected to the side surface of the transformer, and the protector fuse housed in the fuse box can be connected to the secondary terminal of the transformer in the vicinity thereof, the transformer can be connected. It is possible to shorten the distance between the protector fuse and the protector fuse to improve the insulation performance between them and to greatly widen the protection range against a short-circuit accident.

[0010]

【Example】

Examples will be described with reference to FIGS. 1 to 6. 1 to 3 show the external configuration of the spot network power receiving equipment, FIG. 6 shows the single-wire connection configuration thereof, and 7 shows SF ₆ gas, etc. in a sealed container housing the transformer body TR. This is a gas-insulated network transformer that is filled with the insulating gas described in 1. The primary and secondary terminals are located on the upper left and lower sides, respectively.

Reference numeral 8 is a disconnector case directly accommodating the upper part of the left side surface of the transformer 7 and containing a primary disconnector DS connected to the primary terminal of the transformer 7, and having an insulating property such as SF ₆ gas. An L-shaped connector 10 of a receiving wire 9 connected to a distribution line is detachably connected to a cable bushing provided on the upper surface of the disconnector case 8 in which gas is enclosed.

Reference numeral 11 denotes a fuse storage box which is arranged immediately below the disconnector case 8 and which connects the transformer 7 and a protector panel, which will be described later, and stores the protector fuse PrF. As shown in FIG. 2, the secondary terminal 12 led out from the lower part of the transformer 7 is introduced into the storage box 11, and the protector fuse PrF is connected to the secondary terminal 12 via the flexible conductor 13, the connection conductor 14 and the like. ing.

Reference numeral 15 is a protector panel that houses trading instruments MOF, protector circuit breaker PrCB, etc., and 16 is a take-off panel that houses a plurality of take-off circuit breakers TOCB, which are take-off devices. The transformers 7 are arranged in a row and are installed on the front surface of the transformer 7 with their back surfaces facing the transformer 7.

The storage box 11 is connected to the lower left side of the rear surface of the protector board 15, and the connecting conductor 17 connected to the protector fuse PrF is provided in the protector board 15 as shown in FIGS. 4 and 5. Introduced and connected via conductor 18 to trading instrument MOF, circuit breaker PrCB.

On the upper surfaces of the two boards 15 and 16, there are provided insulation close contact type network busbars 19 connected to the load side of the protector circuit breaker PrCB in the left-right direction, and the cutoffs in the take-off board 16 are cut off. A container TOCB is branched and connected to this bus bar 19. Reference numerals 20 and 21 are ventilation boxes provided on the upper surfaces of both boards 15 and 16, and in particular, the upper surface of the ventilation box 21 of the take-off board 16 is used for communication with the secondary side of another bank, although not shown. There is a bus duct.

Here, as is clear from FIG. 1, the width of the high-level equipment, that is, the length in the left-right direction between the transformer 7 and the disconnector case 8 of the primary disconnector DS, and the width of the low-voltage panel. That is, the row board widths of both boards 15 and 16 are substantially the same, and the fuse storage box 11 is housed without protruding from the left side surface of the protector board 15 and the rear surface of the transformer 7.

Therefore, according to the configuration described above, each device has a front maintenance structure and is installed with the backs of the devices back to back, resulting in a rational arrangement and a space for installing the device. Since the size of the protector panel 15 is greatly reduced and the protector panel 15 is improved from the conventional front-rear surface maintenance type to the front maintenance type, maintenance workability is improved.

[0018]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Since the protector panel and the take-off panel are installed in a row on the front of the network transformer with the primary disconnector on the upper side surface, the special equipment and the low voltage panel are integrated, so the entire equipment is compact. It is possible to reduce the installation space and reduce the installation space.It is possible to reduce the size of the electrical room where this kind of power receiving equipment is placed, and it has a high load value for a limited space such as in a building. It can be effectively used.

Moreover, since the fuse housing box is arranged immediately below the primary disconnector and the protector fuse housed therein can be arranged in the vicinity of the secondary terminal of the transformer, the transformer and the protector fuse can be arranged. It is possible to improve the insulation performance during this period by minimizing the length of the conductor with the cable, widening the protection range against short-circuit accidents, and improving the reliability of the equipment.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a spot network power receiving facility according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a side view showing the internal structure of the fuse storage box of the first embodiment.

FIG. 5 is a plan view of FIG.

FIG. 6 is a single-line connection configuration diagram of an embodiment.

FIG. 7 is a plan view of a conventional example.

FIG. 8 is a side view of FIG.

[Explanation of symbols]

 7 Network transformer 8 Disconnector case 11 Fuse storage box 15 Protector panel 16 Takeoff board 19 Network bus DS Primary disconnector PrF protector fuse PrCB protector circuit breaker TOCB Takeoff circuit breaker

Claims (1)

[Claims for utility model registration] [Claim 1] A disconnector case accommodating a primary disconnector is directly connected to the upper side surface of the network transformer, and the transformer is directly under the disconnector case. A fuse storage box containing a protector fuse connected to the secondary terminal of the transformer is arranged, and a protector panel containing a protector breaker and a network bus bar from the breaker are arranged in front of the transformer. A take-off board that stores the take-off device that is branched and connected is installed in a row board with the back surface of the take-off device facing the transformer, and the spot network that connects the transformer and the protector board by the fuse storage box. Power receiving equipment.