JP4144929B2 - Mobile transformer equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile transformer facility used in an uninterruptible replacement work of an existing transformer or a disaster.
[0002]
[Prior art]
If the existing transformer is replaced without an uninterruptible power or the existing transformer becomes unusable due to a disaster, etc., there is a mobile transformer facility that is mounted on a moving vehicle such as a truck and carried to the construction site or disaster site. Used. The conventional mobile transformer equipment includes a mobile transformer having a manually operated tap changer, a high-voltage side terminal connected to each primary line of the existing transformer via a high-voltage cable, and the high-voltage terminal. A high-voltage circuit breaker disposed between the side terminal and the primary terminal of the mobile transformer, a low-voltage terminal connected to each secondary line of the existing transformer via a low-voltage cable, and the low-voltage terminal A dedicated low-voltage circuit breaker placed between the side terminal and the secondary terminal of the mobile transformer, and a control device that controls the introduction of the low-voltage circuit breaker by determining the insertion condition of the low-voltage circuit breaker It has a structure stored inside a large storage case constructed on the truck bed of this truck. The storage case is also provided with a cable storage chamber for storing the high-voltage cable and the low-voltage cable.
[0003]
[Problems to be solved by the invention]
Conventionally, however, the mobile transformer equipment has been configured based on the idea of constructing a large storage case on the platform of a dedicated truck, so that it was not necessary to make the equipment particularly compact. Therefore, the present situation is that no special device for compactness has been made with respect to the arrangement of each device stored in the storage case.
[0004]
An object of the present invention is to provide a small-sized mobile transformer facility that can be transported by a general truck rather than preparing a dedicated truck.
[0005]
Another object of the present invention is to provide a mobile transformer facility that is small and easy to assemble.
[0006]
Another object of the present invention is to provide a mobile transformer facility that is small in size and excellent in operational safety.
[0007]
Still another object of the present invention is to provide a mobile transformer facility which can be miniaturized and can carry a high-voltage cable and a low-voltage cable together.
[0008]
[Means for Solving the Problems]
The mobile transformer equipment to be improved by the present invention includes a mobile transformer equipped with a manually operated tap changer, and a primary side (high voltage side) of each existing transformer via a high voltage cable. Connect the high voltage side terminal to be connected, the high voltage side circuit breaker placed between the high voltage side terminal and the primary side terminal of the mobile transformer, and the low voltage side cable to the secondary (low voltage side) wires of the existing transformer. A low-voltage side terminal connected to each other via the low-voltage side circuit breaker, a low-voltage side circuit breaker disposed between the low-voltage side terminal and the secondary terminal of the mobile transformer, And a control device for controlling the insertion of the circuit breaker. At least the mobile transformer, the high-voltage circuit breaker, the low-voltage circuit breaker, and the control device are stored in a movable storage case. The high voltage side terminal and the low voltage side terminal can be arranged inside or outside the storage case.
[0009]
In the present invention, the mobile transformer has a manual operation portion of the tap changer on the first side surface, the primary side terminal is provided on the second side surface opposite to the first side surface, It is set as the structure provided with the secondary side terminal in the 3rd side surface located between 2 side surfaces. The storage case also includes a first side wall having a first opening, a second side wall having a second opening and facing the first side wall, and first and second side walls. A third side wall located between the first and second side walls, and a fourth side wall facing the third side wall. Note that a third opening may be provided in the third side wall. Furthermore, an opening / closing door is provided for each of the first to third openings of the storage case.
[0010]
The mobile transformer has a first side surface facing the first side wall portion, a second side surface facing the second side wall portion, and a third side surface facing the third side wall portion. Place inside the storage case. In addition, an operation part of the control device and a low-pressure circuit breaker are arranged in a position that can be operated through the first opening of the first side wall part inside the storage case. Further, a high-voltage circuit breaker is disposed in a space between the second side wall portion inside the storage case and the second side surface of the mobile transformer. In addition, a high-voltage side terminal and a low-voltage side terminal are arranged inside the storage case at a position where they can be connected through the third opening of the third side wall, and in the third opening, the high-voltage side terminal is connected to the storage case. It arrange | positions at the 2nd side wall part side, and arrange | positions a low voltage | pressure side terminal at the 1st side wall part side. When the third opening is not provided, the high voltage side terminal and the low voltage side terminal may be provided outside the third side wall, and in this case, the high voltage side terminal is connected to the second side wall of the storage case. And the low voltage side terminal is arranged on the first side wall portion side.
[0011]
As in the present invention, the manual operation part of the tap changer, the operation part of the control device, and the low-voltage circuit breaker are arranged on the first side surface side of the mobile transformer, and the tap is opened from the first opening of the storage case. The manual operation part of the switching device and the operation part of the control device can be operated, and a high-voltage circuit breaker is disposed on the second side surface opposite to the first side surface of the mobile transformer and provided in the storage case. A high voltage side terminal and a low voltage side terminal disposed at positions where the high voltage side circuit breaker can be accessed through the second opening and can be connected through the third opening provided in the third side wall of the storage case. (Or the high voltage river terminal and the low voltage side terminal arranged outside the third side wall part), the high voltage side terminal is arranged on the second side wall part side of the storage case, and the low voltage side terminal is arranged on the first side wall part side. By arranging the low voltage side equipment and the high voltage side equipment on both sides of the mobile transformer Can be disposed only, even to shorten the distance between the third side wall portion and the fourth side wall portion of the storage case, can house the equipment inside the housing case. Therefore, the storage case can be significantly reduced in size compared to the conventional case. Further, the low-voltage side electrical connection and the high-voltage side electrical connection inside the storage case can be easily performed with short wiring and without complicated wiring. If the low-voltage circuit breaker and the high-voltage circuit breaker are arranged separately on both sides of the mobile transformer, the low-pressure side and the high-voltage side will be mistaken when the low-voltage circuit breaker and the high-voltage circuit breaker are operated manually. The possibility of operation is reduced.
[0012]
In particular, if a current limiting fuse provided between the high voltage side circuit breaker and the high voltage side terminal is fixed to the second side surface of the mobile transformer and the high voltage side circuit breaker is disposed below the current limiting fuse, In addition to the need for a structure for fixing the battery, the installation space for the current-limiting fuse and the high-voltage circuit breaker can be reduced, and the housing case can be further reduced in size.
[0013]
In addition, fixing the low-voltage circuit breaker to the third side of the mobile transformer not only eliminates the need for a structure for fixing the low-voltage circuit breaker, but also reduces the installation space for the low-voltage circuit breaker. it can.
[0014]
Furthermore, when the current transformer for measuring the current attached to the cable connecting the secondary terminal of the mobile transformer and the low-voltage circuit breaker is fixed to the third side of the mobile transformer, the current transformer is fixed. This not only eliminates the need for a structure, but also reduces the installation space for the current transformer.
[0015]
If a cable storage portion for storing the high-voltage cable and the low-voltage cable is provided in the upper part of the storage case, the height of the storage case is only slightly increased, and it is not necessary to increase the cross-sectional shape of the storage case. Therefore, the storage case can be reduced in size. The cable storage portion does not need to have a structure for completely storing the cable, and preferably has a shape with at least an upper opening.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 4 are a left side view, a plan view, a right side view, and a rear view of a truck-mounted mobile transformer facility 1 in which the mobile transformer facility 5 of the present invention is mounted on the loading platform of the truck 3. This truck 3 is a commercially available two-ton truck, and a mobile transformer facility 5 is mounted on the front side (closer to the driver's seat) of the truck 3 on the loading platform 3a.
[0017]
As can be seen from FIG. 1 to FIG. 3, the mobile transformer facility 5 is configured to have a size capable of leaving a work space on the rear side of the loading platform 3 a while being mounted on the front side of the loading platform 3 a of the truck 3. ing. The mobile transformer facility 5 is fixed on the loading platform of the truck 3 using a predetermined fixing tool. Since it is a commercial truck, when using the mobile transformer equipment 5, the side plates 3b and 3c that are rotatably mounted on the sides of the loading platform 3a are opened to the outside so that they hang down below the loading platform 3a. To do. For ease of understanding, the side plates 3b and 3d are depicted as transparent in FIGS.
[0018]
All the devices constituting the mobile transformer facility 5 are stored in the storage case 7. The storage case 7 has a box structure in which a plurality of iron plates are mounted on an iron frame. The storage case 7 has a first side wall 7a having a first opening 9 that opens to one side of the loading platform 3a of the truck 3 (the right side when the truck 3 is viewed from the front) (FIG. 3). And a second opening 11 that opens to the other side of the loading platform 3a of the truck 3 (left side when the truck 3 is viewed from the front) and is opposed to the first side wall 7a. And a third opening 13 located between the first and second side walls 7a and 7b and opening toward the rear side of the loading platform 3a of the truck 3. And a fourth side wall 7d (see FIGS. 1 and 3) that faces the third side wall 7c and is located on the driver's seat side of the truck 3. ing. The first to third opening / closing doors 15, 17, and 19 are provided for the first to third openings 9, 11, and 13, respectively.
[0019]
As shown in FIGS. 3 and 4, the first opening / closing door 15 and the third opening / closing door 19 are sliding doors that slide vertically, and the second opening / closing door 17 shown in FIG. 1 is opened and closed by a hinge. This is a hinge type door. The position of the first opening 9 is determined such that the first opening 9 is opened when the first opening / closing door 15 is slid upward, and the first opening 9 is closed when the first opening 9 is slid downward. It has been. The position of the third opening 13 is such that the third opening 13 is opened when the third opening / closing door 19 is slid down and the third opening 13 is closed when the third opening 13 is slid up. It has been established. The open / close doors 15 and 19 are provided with handles 21 and 23 that are gripped when the door is opened and closed. The second door 17 is also provided with a lever 25 that is operated when the door is opened and closed. Although not shown in FIG. 3, the first opening / closing door 15 and the first opening / closing door 15 are separated from the first opening 9 and the first door 15 so that the door can be stopped or fixed in a plurality of stages during the slide. Locking structures are provided on both of the open / close doors 15.
[0020]
Four fence members 27a to 27d are fixed to the outer peripheral portion of the top plate 7e of the storage case 7 to constitute a cable storage portion 27 for storing cables. Also, lifting metal fittings 28 are fixed to the four corners of the top plate 7 e of the storage case 7.
[0021]
In order to configure the mobile transformer facility 5 in such a size that the working space can be left behind the loading platform 3a while being mounted on the front side of the loading platform 3a of the truck 3, the mobile transformer facility 5 is made compact. There must be. In this example, the mobile transformer facility 5 was made compact as follows. 5 to 9 show the internal structure of the storage case 7 of the mobile transformer facility 5. In these drawings, only the outer frame of the storage case is shown by a solid line. In these drawings, only the main portion of the wiring cable is shown for easy understanding. A circuit diagram of this apparatus is shown in FIG.
[0022]
In these figures, 29 is a mobile transformer. This mobile transformer 29 has two transformer coils (for example, 50 kW and 30 kW) having different capacities arranged side by side inside a horizontally long transformer case 31 (so that they are arranged in the left and right direction of the loading platform of the truck 3). It is stored. In order not to make the height of the storage case 7 too high, the mobile transformer 29 is fixed to the frame in a state where it is dropped into a hole formed by the frame constituting the bottom of the storage case 7. . The mobile transformer 29 has a manual operation portion (handle) 33 of a tap changer on the first side surface 31a of the transformer case 31 facing the first side wall portion 7a of the storage case 7 (see FIG. 6 and FIG. 6). (See FIG. 7). As indicated by a broken line in FIG. 7, the manual operation portion (handle) 33 is provided at a position where it can be operated through the first opening 9 provided in the storage case 7. When adjusting the voltage of the mobile transformer 29, the manual operation part (handle) 33 is manually operated.
[0023]
As shown in FIGS. 6 and 8, three three-phase primary terminals (high voltage side) 35 </ b> R, 35 </ b> S and 35 </ b> R are provided on the second side surface 31 b of the mobile transformer 29 that faces the first side surface 31 a of the transformer case 31. 35T is arranged. Further, as shown in FIGS. 5 and 8, the third side surface 31c located between the first side surface 31a and the second side surface 31b of the transformer case 31 has a three-phase output terminal and a neutral point. And four secondary terminals 37U, 37V, 37W, and 37N including the terminals.
[0024]
As shown in FIGS. 5, 6, and 8, the storage case 7 has a space between the second side wall portion 7 b of the storage case 7 and the second side surface 31 b of the transformer case 31 of the mobile transformer 29. A high-pressure circuit breaker 39 is arranged in the lower part of the space. The high voltage side circuit breaker 39 will be described in detail later. 6 and 8, on the second side surface 31b of the transformer case 31 of the mobile transformer 29, a high-voltage circuit breaker 39 and a description will be given later at a position below the primary terminals 35R, 35S, and 35T. A support 43 (see FIG. 8) for fixing current-limiting fuses 41R, 41S, 41T provided between the high-voltage side terminals to be connected is fixed. When the current limiting fuses 41R, 41S, 41T are fixed to the transformer case 31 in this way, a special structure for fixing the current limiting fuses 41R, 41S, 41T becomes unnecessary. If the high-voltage circuit breaker 39 is disposed under the current limiting fuses 41R, 41S, 41T, the installation space can be reduced, and the storage case 7 can be further reduced in size.
[0025]
The high-voltage circuit breaker 39 is an electric high-voltage circuit breaker or a high-voltage electromagnetic contactor with a latch mechanism that can be turned on and off electrically, and can maintain the applied state even after power is not supplied. is there. As this type of electric high voltage circuit breaker, for example, one sold by Yaskawa Electric Co., Ltd. under the product name of rotary arc high voltage electromagnetic contactor HGR-951C-C can be used. In this embodiment, as shown in FIGS. 5 and 8, a closing lever 45 for manually closing the high-voltage circuit breaker 39 is attached to the operation shaft of this commercially available high-voltage electromagnetic contactor. The high-pressure circuit breaker 39 is previously provided with a trip lever 46 for manually removing the latch mechanism. The insertion lever 45 and the release lever 46 are operated through the second opening 11 closed by the second opening / closing door 17 provided on the second side wall 7b of the storage case 7 shown in FIG. Thus, if the high-voltage circuit breaker 39 is arranged at a position where the closing lever 45 and the release lever 46 can be operated through the second opening 11 different from the first opening 9, the operator can inadvertently It is possible to prevent the levers 45 and 46 from being operated as much as possible.
[0026]
As shown in FIGS. 5 to 7, an operation device with a display function of the control device is provided inside the storage case 7 at a position where it can be operated through the first opening 9 of the first side wall 7 a of the storage case 7. 47 and a control device fixed side main body 48 (operation unit) including a manual operation unit and a low-voltage circuit breaker 49 are arranged. The operation device 47 with a display function and the control device stationary side main body 48 are fixed to the first side surface 31 a of the transformer case 31 of the moving transformer 29. In particular, the operation device 47 with a display function is configured to be portable, including operation command output means for outputting display means and operation commands to the drive circuits of the high-voltage circuit breaker 39 and the low-voltage circuit breaker 49, respectively. In this example, a microcomputer is built in the operation device 47 with a display function, and all the determinations made by the control device are executed by this built-in microcomputer. The display means of the operation device 47 with a display function is constituted by a liquid crystal touch panel and has a switch function in addition to the display function. Therefore, the operator can input all the operation commands simply by touching the switch display displayed on the screen of the display means. Since it has such a structure, in this example, the operation device 47 with a display function constitutes a main part of the control device.
[0027]
As shown in FIG. 5, the first side surface 31 a of the transformer case 31 is provided with an operation device fixing portion 51 that removably fixes the operation device 47 with a display function. The operation device fixing unit 51 can display the display means from the outside through the first opening 9 of the storage case 7 in a state where the operation device 47 with a display function is fixed to the operation device fixing unit 51, and also has a display function. It is provided at a position where the operation device 47 can be operated. At both ends of the case of the operation device 47 with a display function, a locking screw member 47c having a head portion and a neck portion with a screw is provided. The neck portion with a screw is screwed to the case of the operation device 47 with a display function. The pair of plate members 51a and 51a constituting the operating device fixing portion 51 are formed with groove portions 51b and 51b into which the neck portion of the locking screw member 47c is fitted. The operating device 47 with a display function can be detached from the operating device fixing portion 51 by turning the head of the locking screw member 47c to loosen the tightening force. In addition, the attachment angle of the operation device 47 with a display function can be adjusted in a state where the operation device 47 with a display function is attached to the operation device fixing portion 51.
[0028]
Further, the control device fixed side main body 48 includes an emergency stop switch SW1 that outputs a cutoff command signal to the drive circuit of the high voltage side circuit breaker 39 in order to put the high voltage side circuit breaker 39 into a cutoff state in an emergency or the like. The control device fixing side main body 48 is also provided at a position where it can be operated through the first opening 9 of the storage case 7. When both the high-voltage circuit breaker 39 and the low-voltage circuit breaker 49 are operated by the operation device 47 with a display function, an emergency stop switch is provided in the operation device 47 with a display function, and the high-voltage circuit breaker is provided on the operation device 47 with a display function. If the breaker can be emergency cut off, the high voltage side breaker 39 may be accidentally cut off at a time other than an emergency, and a power failure may occur. Therefore, in this example, the emergency stop switch SW1 that outputs an operation command for electrically shutting off the high-voltage circuit breaker 39 is provided in the control device fixed-side main body 48 separately from the operation device 47 with a display function. The switch SW2 provided in the control device fixed side main body 48 is a control power switch of the control device.
[0029]
As shown in FIG. 9, in this example, the operation device 47 with a display function is connected to the control device fixing side main body 48 of the control device via a cable. If the operation device 47 with a display function that constitutes a part of the operation unit of the control device is provided so as to be portable (portable) as in this example, there is not enough space around the track 3 or the surroundings can be seen. In a bad case, the worker can move to any position with the operation device 47 with a display function, and can operate the high-pressure circuit breaker 39 and the low-pressure circuit breaker 49 at any position. Therefore, the burden on the worker can be greatly reduced.
[0030]
The low-voltage circuit breaker 49 is fixed to an attachment frame 52 fixed to the third side surface 31 c of the transformer case 31 of the mobile transformer 29. The low-voltage circuit breaker 49 can be controlled to be turned on and off electrically. In this example, a circuit breaker for wiring sold by Terasaki Electric Co., Ltd. under the product name XS400NS is used. The low-voltage circuit breaker 49 is composed of a cable connection terminal box 49A and a circuit breaker body 49B. The circuit breaker body 49B includes a manual operation handle for cutting and a tool insertion port in consideration of operation at the time of failure. And a manual switch is also provided. Unlike the high-voltage circuit breaker 39, the low-voltage circuit breaker 49 does not have a latch mechanism. As will be described later, in the low-pressure circuit breaker 49, after the high-voltage circuit breaker 39 is turned on, the control device (47) determines the closing condition of the low-pressure circuit breaker 49, and the control device (47). When the input command is output from, the input state is entered.
[0031]
Inside the storage case 7, a cable terminal board 53 is arranged at a position where it can be connected through the third opening 13 provided in the third side wall 7 c of the storage case 7. The cable terminal board 53 includes high-voltage terminals 55R, 55S, and 55T that are connected to primary wires of an existing transformer (not shown) via high-voltage cables (not shown), and secondary wires of the existing transformer. Low voltage terminals 57U1, 57U2, 57N1, 57N2, 57V1, 57V2, 57W1, 57W2 and a ground terminal 58 are provided, which are connected via low voltage cables (not shown). In this example, two low voltage side terminals 57U1 to 57W2 are provided for each phase. This is to double the current capacity by using two cables for each phase. The two low-voltage terminals of each phase are electrically connected to a common terminal portion inside the storage case 7. In addition, when using an expensive cable with a large current capacity, it is needless to say that one low-voltage side terminal is provided for each phase. As shown in FIG. 5, the high-voltage side terminals 55R, 55S and 55T are arranged on the second side wall portion 7b side of the storage case 7, and the low-voltage side terminals 57U1 to 57W2 are the first side wall portion 7a of the storage case 7. Arranged on the side.
[0032]
The high-voltage side terminals 55R, 55S, and 55T are connected to the high-voltage side of the current limiting fuses 41R to 41T as shown in FIGS. The low voltage side of the current limiting fuses 41R to 41T is connected to the input terminal of the high voltage circuit breaker 39, and the output terminal of the high voltage circuit breaker 39 is connected to the primary terminals 35R to 35T of the mobile transformer 29. The low voltage side terminals 57U1 to 57W2 are electrically connected to the output terminal of the cable connection terminal box 49A of the low voltage side circuit breaker 49, as shown in FIGS. The input terminals of the cable connection terminal box 49A of the low-voltage circuit breaker 49 are connected to the secondary terminals 37U to 37W of the mobile transformer 29, respectively. As shown in FIGS. 5, 8, and 10, two of the four cables that connect the secondary terminals 37 </ b> U to 37 </ b> W of the mobile transformer 29 and the low-voltage circuit breaker 49 are included in the mobile transformer 29. Current transformers 59 and 61 are arranged for measuring the output current of the current. These current transformers 59 and 61 are fixed to a mounting plate 63 fixed to the third side surface 31 c of the transformer case 31 of the mobile transformer 29. If it does in this way, the structure only for fixing a current transformer will become unnecessary, and the installation space of a current transformer can be made small.
[0033]
As shown in this example, the manual operation unit 33 of the tap changer, the operation units (47, 48) of the control device, and the low-voltage circuit breaker 49 are arranged on the first side surface 31a side of the mobile transformer 29 for storage. The manual operation portion 33 of the tap changer and the operation portions (47, 48) of the control device can be operated from the first opening 9 of the case 7, and the side opposite to the first side surface 31a of the mobile transformer 29. The high voltage side circuit breaker 39 is arranged on the second side surface 31b side of the storage case 7 so that the high voltage side circuit breaker 39 can be accessed through the second opening 11 provided in the storage case 7, and the third side wall of the storage case 7 is further provided. The high-voltage side terminals 55R, 55S, 55T arranged at positions connectable through the third opening 13 provided in the part 7c are arranged on the second side wall 7b side of the storage case 7 in the third opening 13. Also houses the low-voltage side terminals 57U1 to 57W2 If it arrange | positions at the 1st side wall part 7a side of the case 7, the low voltage | pressure side apparatus and the high voltage | pressure side apparatus can be arrange | positioned separately on the both sides of the mobile transformer 29, The 3rd side wall part 7c of the storage case 7 and Each device can be housed in the housing case 7 even if the distance from the fourth side wall portion 7d is shortened. Therefore, the storage case 7 can be significantly downsized compared to the conventional case. Also, with this arrangement, the low-voltage side electrical connection and the high-voltage side electrical connection inside the storage case 7 can be easily performed with short wiring and without complicated wiring. Further, when the low-voltage circuit breaker 49 and the high-voltage circuit breaker 39 are arranged separately on both sides of the mobile transformer 29, when the low-voltage circuit breaker 49 and the high-voltage circuit breaker 39 are operated manually, The possibility of operating the high-pressure side by mistake is reduced.
[0034]
A battery (secondary battery) 65 and a battery charger 67 for the battery 65 are disposed in a position accessible through the first opening 9 of the storage case 7, that is, in a space below the low-voltage circuit breaker 49. The battery 65 constitutes a part of the power supply of the power supply circuit of the control device (47, 48). The control device (47, 48) powers the battery 65 until the high-voltage circuit breaker 39 is turned on. Is configured to operate as When the battery 65 is mounted in this manner, the control devices (47, 48) can be put into an operating state even when the mobile transformer 29 serving as a control power source during steady operation is not charged. For this reason, it is possible to detect the phase loss of the low-voltage cable and the grounding failure before the high-voltage circuit breaker 39 is turned on, so that the safety of work can be improved. A charging circuit that rectifies the output of the mobile transformer 29 and charges the battery 65 is built in the charger 67, and the charger 67 charges the battery 65 when the mobile transformer 29 is in operation. As can be seen from FIG. 10, the battery 65 can be charged by a commercial power source of 100 V through the charging terminal 66. In addition, after the high voltage | pressure side circuit breaker 39 is thrown in, a control apparatus (47,48) operate | moves using the output of the charger 67 as a power supply. In this example, the driving power of the high-voltage circuit breaker 39 is obtained from the output side of the low-voltage circuit breaker 49, that is, the low-voltage side of the existing transformer, but the driving power of the high-voltage circuit breaker 39 is obtained from the battery 65. Of course, it is good. In this way, even when a mobile transformer is used during a power failure, the high-voltage circuit breaker 39 can be driven electrically.
[0035]
In the circuit shown in FIG. 10, 69 is a drive circuit for the high-voltage circuit breaker 39, and 71 is a drive circuit for the low-voltage circuit breaker 49. Reference numeral 47a denotes a control circuit housed in the operation device 47 with a display function, and its main part is constituted by a microcomputer. Reference numeral 47b denotes a display unit of the operation device 47 with a display function. In this example, the display unit 47b is configured by a liquid crystal touch panel. The control circuit 47a of the control device includes the secondary line voltage and phase of the secondary transformer 29 and the low voltage side terminals 57U1 to 57W2 measured using the secondary output voltages U2 to N2 and current of the secondary transformer 29 as inputs. The voltage difference and phase difference with the line voltage and phase on the secondary side of the existing transformer obtained by measuring the secondary side voltages U1 to N1 of the existing transformer input through the And a function (phase detection function) for determining whether or not the phase difference is within an allowable range and displaying the result on the display means 47b. An example of such a technique relating to phase detection is described in detail in Japanese Utility Model Publication No. 5-40681.
[0036]
The control circuit 47a determines whether the high voltage side cable is connected to the high voltage side terminals 55R to 55T and the low voltage side cable to the low voltage side terminals 57U1 to 57W2 based on the voltages U2 to N2 and the voltages U1 to N1. It has the function (error wiring detection function) to determine whether or not to display on the display means 47b.
[0037]
Further, the control circuit 47a is connected with a high-voltage circuit breaker closing state detection circuit 74 that outputs a closing state detection signal when the output of the battery 65 or the charger 67 is used as a power source and the high-voltage circuit breaker 39 is in a closing state. Yes. The high-voltage circuit breaker closing state detection circuit 74 includes a detection switch 73 having one end electrically connected to the outputs of the battery 65 and the charger 67 and the other end electrically connected to the input of the control circuit 47a. . The detection switch 73 is a micro switch that is turned on / off by the operating shaft of the high-voltage circuit breaker 39, and is turned on when the high-voltage circuit breaker 39 is in the on state, and when the high-voltage circuit breaker 39 is in the circuit break state. Will be off. Therefore, when the detection switch 73 is in the on state, when the control power switch SW2 is in the on state, an on signal (an on state detection signal) is input to the control circuit 47a, and the control circuit 47a receives this signal. During the time, the display means 47b displays that the high-voltage circuit breaker 39 is in the on state.
[0038]
Also connected to the control circuit 47a is a low-voltage circuit breaker on-state detection circuit 76 that outputs an on-state detection signal when the low-voltage side circuit breaker 49 is in the on state using the output of the battery 65 or the charger 67 as a power source. Yes. The low-voltage circuit breaker closing state detection circuit 76 includes a detection switch 75 having one end electrically connected to the outputs of the battery 65 and the charger 67 and the other end electrically connected to the input of the control circuit 47a. . This detection switch 75 is a micro switch that is turned on / off by the operating shaft of the low-voltage circuit breaker 49, and is turned on when the low-voltage circuit breaker 49 is in the on state, and when the low-voltage circuit breaker 49 is in the circuit break state. Will be off. Therefore, when the detection switch 75 is in the on state, when the control power switch SW2 is in the on state, an on signal (an on state detection signal) is input to the control circuit 47a, and the control circuit 47a receives this signal. During the time, the display means 47b displays that the low-voltage circuit breaker 49 is in the on state.
[0039]
Further, the control circuit 47a has a function of determining the condition for turning on the high-voltage circuit breaker 39. The input condition in this case is that there is no phase loss and grounding failure of the low-voltage cable, and the low-voltage circuit breaker 49 is in a disconnected state. Only when this input condition is met, the screen of the display means 47b. When the upper switch is operated, a closing command is output to the drive circuit 69 of the high-voltage circuit breaker 39. When the input conditions are not met, the input condition that is not satisfied by the display means 47b is displayed as characters or images, and when the input condition is satisfied, the display means 47b indicates the characters or images. The control circuit 47a is configured to display the above.
[0040]
In addition, the control circuit 47a determines that the low-voltage circuit breaker 49 is turned on (the phase detection result is correct, all cables including the ground cable are connected correctly, and the high-voltage circuit breaker 39 is in the on state). Has a function (safety function) that allows the low-voltage circuit breaker 49 to be turned on only when they are arranged. If the safety conditions are not met, the safety command is not output to the drive circuit 71 of the low-voltage circuit breaker 49 even if the switch on the screen of the display means 47b of the operation device 47 with a display function is operated. It is a function to do. Such a function is also adopted in the conventional apparatus. In this example, the input condition that is not satisfied by the display means 47b is displayed as characters or images, and when the input condition is satisfied, that fact is displayed as characters or images on the display means 47b. A control circuit 47a is configured.
[0041]
In this example, the power source of the drive circuit 69 of the high voltage side circuit breaker 39 is obtained from the secondary side of the low voltage side circuit breaker 49, that is, the secondary side power source of the existing transformer (from the load in the charged state on the secondary side). Thus, the power source of the drive circuit 71 of the low-voltage circuit breaker 49 is obtained from the secondary side of the mobile transformer 29. Therefore, when the existing transformer side is in a power failure state and no voltage is applied to the low voltage side terminals 57U1 to 57W2 (when the load side is not in a charged state), the high voltage side circuit breaker 39 cannot be turned on electrically. In such a case, the closing lever 45 is manually rotated and the high-pressure circuit breaker 39 is turned on. If the high-voltage circuit breaker 39 is to be cut off under normal conditions, the high-voltage circuit breaker 39 is turned off by the operation device 47 with a display function. If it is necessary to shut off the high-voltage circuit breaker 39 in an emergency, if the secondary side of the low-voltage circuit breaker 49, that is, the secondary side of the existing transformer is in a charged state, the emergency stop switch SW1 is turned on. Then, by operating the tripping mechanism of the drive circuit 69 of the high-voltage circuit breaker 39, the high-voltage circuit breaker 39 is brought into a cut-off state. In the event of an emergency, if the secondary side of the low-voltage circuit breaker 49, that is, the secondary side of the existing transformer is not in a charged state, the latch mechanism of the high-voltage circuit breaker 39 is pulled off by manually depressing the release lever 46. The side circuit breaker 39 is put into a cut-off state.
[0042]
An operation procedure and an operation procedure of the apparatus when the apparatus of this example is replaced, for example, in a place where there is not enough space around the existing transformer will be described. Truck 3 is stopped near the existing transformer. Then, the first and third open / close doors 15 and 13 are opened, a hand is inserted from the first opening 9 to turn on the control power switch SW2 on the control device fixing side main body 48, and the battery 65 controls the control circuit. The power supply 47a is turned on. The operation device 47 with a display function is removed from the operation device fixing portion 51, and the operation device 47 with a display function is transferred to an operator on the loading platform 3a of the truck 3. The operator of the loading platform 3a of the truck 3 lowers the cable from the cable storage section 27 on the storage case 7 onto the loading platform 3a. The operator on the loading platform 3a of the truck 3 first confirms that the high-voltage circuit breaker 39 and the low-voltage circuit breaker 49 are not turned on on the screen of the display means 47b of the operation device 47 with a display function. On the loading platform 3a, the low voltage side cable is connected to the low voltage side terminals 57U1 to 57W2, one end of the grounding cable is connected to the ground terminal 58, and the other end is grounded according to a predetermined procedure. Next, a high voltage side cable is connected to the high voltage side terminals 55R, 55S, and 55T. Then, the low voltage side cable is connected to the secondary side (low voltage side) line in the live line state of the existing transformer. In this state, the phase loss of the low-voltage cable and the grounding failure are confirmed on the screen of the display means 47b of the operation device 47 with a display function. Thereafter, the high voltage cable is connected to the primary side (high voltage side) line in the live line state of the existing transformer.
[0043]
Next, when the control circuit 47a displays that the closing conditions for the high-voltage circuit breaker 39 are met, the high-pressure circuit breaker closing switch on the display means 47a of the operation device 47 with a display function is pushed to The circuit breaker 39 is turned on. Next, when the phase is detected on the low-pressure side, the control circuit 47a determines the closing condition of the low-voltage circuit breaker 49, and displays on the display means 47b that the loading condition of the low-voltage circuit breaker 49 is met. Presses the low-voltage circuit breaker closing switch on the display means 47a of the operation device 47 with a display function to turn on the low-voltage circuit breaker 49, and the mobile transformer 29 is operated in parallel with the existing transformer. The loading operation is performed by an operator standing in a place with a space on the truck bed 3a or around the truck. When the output voltages of the mobile transformer 29 and the existing transformer do not match, the manual operation section (handle) 33 of the tap changer of the mobile transformer 29 is rotated to adjust the voltage. If the voltage and phase do not match even after voltage adjustment, the input operation is executed again after a certain period of time. After the mobile transformer 29 is operated in parallel with the existing transformer, the existing transformer is disconnected from the distribution line and the existing transformer is replaced. After the replacement of the existing transformer is completed, after the replaced transformer and the moving transformer 29 are operated in parallel, the low-voltage circuit breaker 49 is disconnected and disconnected, and then the high-voltage circuit breaker 39 is disconnected. To. Thereafter, the control power switch SW2 is turned off, the high-voltage cable and the low-voltage cable are disconnected, the cable is placed on the cable storage section 27 on the storage case 7, and the first and third open / close doors 15 and 19 are closed. Other equipment and the replaced existing transformer may be placed on the loading platform 3a.
[0044]
In the above example, the high-voltage side terminal and the low-voltage side terminal are arranged inside the storage case 7 in order to prevent protrusions as much as possible outside the storage case. Or of course, you may arrange | position to an outer wall (3rd side wall part of a storage case).
[0045]
In the above example, the open / close door that closes the second opening is an open / close door using a hinge, but the open / close door that closes the second opening is provided for the first and third openings. Similar to the door, it may be a sliding door.
[0046]
【The invention's effect】
According to the present invention, the manual operation unit of the tap changer, the operation unit of the control device, and the low-voltage circuit breaker are arranged on the first side surface side of the mobile transformer, and the tap is opened from the first opening of the storage case. The manual operation part of the switching device and the operation part of the control device can be operated, and a high-voltage circuit breaker is disposed on the second side surface opposite to the first side surface of the mobile transformer and provided in the storage case. The high voltage side circuit breaker and the low voltage circuit are arranged at a position where the high voltage circuit breaker can be accessed through the second opening and can be connected through a third opening that opens toward the rear side of the loading platform of the storage case truck. If the side terminal is arranged or the high voltage side terminal and the low voltage side terminal are arranged on the third side wall, the low voltage side device and the high voltage side device can be arranged separately on both sides of the mobile transformer, Between the third side wall and the fourth side wall of the storage case. Even if the separation (the dimension between the two side walls located in the front-rear direction of the truck bed) is shortened, each device can be stored inside the storage case, and the storage case can be made much smaller than before. There are advantages that can be made. Further, there is an advantage that the low-voltage side electrical connection and the high-voltage side electrical connection inside the storage case can be easily performed with a short wiring and without complicated wiring.
[0047]
In addition, if a current-limiting fuse provided between the high-voltage circuit breaker and the high-voltage terminal is fixed to the second side of the mobile transformer, and the high-voltage circuit breaker is arranged below the current-limiting fuse, the current-limiting fuse is Not only is the structure for fixing unnecessary, but the installation space for the current limiting fuse and the high-voltage circuit breaker can be reduced, and the storage case can be further reduced in size.
[0048]
In addition, fixing the low-voltage circuit breaker to the third side of the mobile transformer not only eliminates the need for a structure for fixing the low-voltage circuit breaker, but also reduces the installation space for the low-voltage circuit breaker. There are advantages you can do.
[0049]
Furthermore, when the current transformer for measuring the current attached to the cable connecting the secondary terminal of the mobile transformer and the low-voltage circuit breaker is fixed to the third side of the mobile transformer, the current transformer is fixed. Therefore, there is an advantage that not only a structure for the purpose is not required, but also the installation space for the current transformer can be reduced.
[Brief description of the drawings]
FIG. 1 is a left side view of a truck-mounted mobile transformer facility in which the mobile transformer facility of the present invention is mounted on a truck bed.
FIG. 2 is a plan view of the truck-mounted mobile transformer facility of FIG.
3 is a right side view of the truck-mounted mobile transformer facility of FIG. 1. FIG.
4 is a rear view of the truck-mounted mobile transformer facility of FIG. 1. FIG.
FIG. 5 is a view of the internal structure of the storage case of the mobile transformer facility as viewed from the back of the mobile transformer facility.
6 is a plan view of the mobile transformer facility of FIG.
7 is a left side view of the mobile transformer facility of FIG. 5. FIG.
8 is a right side view of the mobile transformer facility of FIG.
FIG. 9 is a diagram showing an internal structure of the mobile transformer facility in a state where the mobile transformer facility is placed on a truck bed.
10 is a circuit diagram of the mobile transformer facility of FIG.
[Explanation of symbols]
1 Truck-mounted mobile transformer equipment
3 tracks
5 Mobile transformer equipment
7 Storage case
9, 11, 13 First to third openings
15, 17, 19 First to third doors
29 Mobile transformer
31 Transformer case
35R, 35S, 35T Primary terminal
37U, 37V, 37W, 37N Secondary terminal
39 High-pressure circuit breaker
41R, 41S, 41T Current limiting fuse
45 Input lever
47 Operating device with display function
48 Control unit fixed side body
49 Low pressure circuit breaker
55R, 55S, 55T High voltage side terminal
57U1 to 57W2 Low voltage terminal
65 battery
67 Charger

Claims (6)

A mobile transformer with a manually operated tap changer;
High-voltage side terminals respectively connected to the primary side wires of the existing transformer via high-voltage side cables;
A high-voltage circuit breaker disposed between the high-voltage terminal and the primary terminal of the mobile transformer;
Low-voltage side terminals respectively connected to the respective secondary-side wires of the existing transformer via low-voltage side cables;
A low-voltage circuit breaker disposed between the low-voltage terminal and the secondary terminal of the mobile transformer;
A control device for determining a charging condition of the low-pressure circuit breaker and controlling at least the charging of the low-voltage circuit breaker;
At least the mobile transformer, the high-voltage side circuit breaker, the low-voltage side circuit breaker, and the mobile transformer equipment housed in a movable storage case,
The mobile transformer comprises a first side, a second side facing the first side surface, and a third side surface located between the first side and the second side , Having a manual operation part of the tap changer on the first side surface,
The storage case includes a first side wall having a first opening, a second side wall having a second opening and facing the first side wall, and the first and second side walls. A third side wall portion located between the side wall portions, and a fourth side wall portion facing the third side wall portion,
Opening and closing doors are provided for the first and second openings, respectively.
In the mobile transformer, the first side surface is opposed to the first side wall portion, the second side surface is opposed to the second side wall portion, and the third side surface is the third side wall portion. It is arranged inside the storage case so as to face the
Inside the storage case, an operation part of the control device and the low-pressure circuit breaker are arranged at a position operable through the first opening of the first side wall part,
The high-voltage circuit breaker is disposed in a space between the second side wall portion inside the storage case and the second side surface of the mobile transformer;
The high-voltage side terminal and the low-voltage side terminal are arranged in the interior or the third side wall part connectable from the third side wall part side of the storage case,
The high-voltage-side terminal is disposed on the second side wall portion side of the storage case and said low-voltage side terminal Ri Contact disposed in said first side wall portion,
A current transformer provided between the high-voltage circuit breaker and the high-voltage terminal is fixed to the second side surface of the mobile transformer. A mobile transformer with a manually operated tap changer;
High-voltage side terminals respectively connected to the primary side wires of the existing transformer via high-voltage side cables;
A high-voltage circuit breaker disposed between the high-voltage terminal and the primary terminal of the mobile transformer;
Low-voltage side terminals respectively connected to the respective secondary-side wires of the existing transformer via low-voltage side cables;
A low-voltage circuit breaker disposed between the low-voltage terminal and the secondary terminal of the mobile transformer;
A control device for determining a charging condition of the low-pressure circuit breaker and controlling at least the charging of the low-voltage circuit breaker;
In the mobile transformer facility in which the mobile transformer, the high-voltage circuit breaker, the high-voltage terminal, the low-voltage terminal, the low-voltage circuit breaker, and the control device are housed in a movable housing case,
The mobile transformer comprises a first side, a second side facing the first side surface, and a third side surface located between the first side and the second side , Having a manual operation part of the tap changer on the first side surface,
The storage case includes a first side wall having a first opening, a second side wall having a second opening and facing the first side wall, and the first and second side walls. A third side wall portion having a third opening located between the side wall portions, and a fourth side wall portion facing the third side wall portion,
Opening and closing doors are provided for the first to third openings, respectively.
In the mobile transformer, the first side surface is opposed to the first side wall portion, the second side surface is opposed to the second side wall portion, and the third side surface is the third side wall portion. It is arranged inside the storage case so as to face the
Inside the storage case, an operation part of the control device and the low-pressure circuit breaker are arranged at a position operable through the first opening of the first side wall part,
The high-voltage circuit breaker is disposed in a space between the second side wall portion inside the storage case and the second side surface of the mobile transformer;
Inside the storage case, the high-voltage side terminal and the low-voltage side terminal are arranged at a position connectable through the third opening of the third side wall,
In the third opening, the high voltage side terminal is disposed on the second side wall portion side of the storage case, and the low voltage side terminal is disposed on the first side wall portion side ,
A current transformer provided between the high-voltage circuit breaker and the high-voltage terminal is fixed to the second side surface of the mobile transformer. The mobile transformer facility according to claim 1 or 2, wherein the high-voltage circuit breaker is disposed below the current-limiting fuse.   The mobile transformer facility according to claim 1 or 2, wherein the low-voltage circuit breaker is fixed to the third side surface of the mobile transformer.   On the third side surface of the mobile transformer, a current transformer is fixed that is attached to a cable connecting the secondary terminal of the mobile transformer and the low-voltage circuit breaker to measure current. The mobile transformer facility according to claim 3.   3. The mobile transformer facility according to claim 1, wherein a cable storage unit that stores the high-voltage cable and the low-voltage cable is provided in an upper portion of the storage case.

Images