Transportable power supply substation

A transportable power supply substation is a power supplying equipment in which electric power machines are mounted on transporting apparatus. The transportable power supply substation in accordance with the present invention including transporting means and electric power distributing means which includes a transformer a current interrupting unit and so on, and the current interrupting unit is rotatably supported by supporting means which comprises a supporting shaft a bearing member and rollers. The current interrupting unit is therefore, rotatable as occasion demands, and is also secured to the transporting means by means of securing means.

BACKGROUND OF THE INVENTION 
The present invention relates to a power supply substation and, more 
particularly to a transportable power supply substation which is 
transportable to anywhere as occasion demands. 
With the growth of the electrical power industry, transmission voltage has 
increased from modest values of 5 to 15 KV to the present high level of 
500 to 750 KV. A high voltage power supply substation is, accordingly, 
required in various places where the power source is needed. 
A transportable power supply substation very conveniently satisfies the 
above requirement. The transportable power supply substation is 
constituted by arranging various electrical machines required in 
electrical power transmission and distribution system on a trailer truck. 
Accordingly, the transportable power supply substation is transportable to 
any place where the power supply substation is needed. In addition, the 
transportable power supply substation is a power supplying equipment in 
which power supplying devices such as, for example, a transformer, an 
interrupter, a disconnecting switch unit and so on are mounted on the 
trailer truck. Accordingly, the transportable power supply substation is 
very conveniently used for various purposes and in various places, because 
it is very easy to set in place by the simple construction thereof. There 
are, however, serious and troublesome problems in case where a power 
supply substation is transported. Particularly, a current interrupter unit 
used for the high voltage is convenient to install and to transport, 
because it is large in size and heavy in weight. Specifically, the 
electrical power supplying machines such as the transformer, the current 
interrupter and a disconnecting switch unit are, in general, arranged on 
the trailer truck along with the length of the trailer truck. The 
electrical power machines must also be installed on the trailer truck 
spaced apart at a given distance from each of adjacent machines in order 
to maintain the insulation distance. The three-phase current interrupter 
must be mounted on the trailer truck so that its arranging direction is 
perpendicular to the length direction of the trailer truck to obtain the 
insulation distance from the other neighbouring machines. In this case, it 
is very inconvenient to transport, since the length of the three-phase 
current interrupter extends over the limit of transportation. 
SUMMARY OF THE INVENTION 
It is an object of the present invention is to provide a high voltage power 
supply substation which is transportable with security. 
It is another object of the invention is to provide a high voltage power 
supply substation which can be restricted to the limit of transport in 
transporting and can be also maintain the insulation distance in use. 
The present invention provides a transportable power supply substation 
comprising, substantially, transporting means for transporting a 
distributing equipment for use in supplying power, distributing means for 
distributing the electric power to an electrical load and a disconnecting 
switch unit for disconnecting the electrical load from a power supply 
line, a current interrupting unit for interrupting the current to be 
supplied to the electrical load from the power supply line, a transformer 
for transforming the voltage of the power supply line to the voltage to be 
applied to the load and a power board for distributing the electric power 
to a load, supporting means for rotatably supporting said current 
interrupting unit and securing means for securing the current interrupting 
unit on the transporting means. 
The provision of rotatable supporting means for supporting the current 
interrupting unit of an apparatus according to the present invention 
overcomes the aforementioned experienced with the prior art apparatus and 
also makes it possible for the transporter to be easily positioned, a 
feature which is frequently required in practice. 
Additional objects and advantages of the present invention will become 
apparent upon consideration of the following description when taken in 
conjunction with the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to the drawing and more particularly to FIG. 1, there is 
illustrated a transportable power supply substation in accordance with the 
present invention. As is shown in FIG. 1, the transportable power supply 
substation comprises transportable means in the form of a semi-trailer 
truck 1, electric power distributing means including a disconnecting 
switch unit 4 for disconnecting a bus bar of a power line from electrical 
equipment, a circuit breaker means including a current interrupting unit 5 
for interrupting current which flows to a load from a power line, a 
transformer 6 and a power-board 7 each of which is mounted on the 
semi-trailer truck 1. 
The semi-trailer truck 1 of the transporting means consists of a truck 2 
and a trailer 3 which is interconnected to a truck flatted bed 2a. The 
disconnecting switch unit 4 is mounted and secured on the front portion of 
a trailer bed 3a of the trailer 3. The current interrupting unit in the 
form of a three-phase vacuum interrupter 5 is rotatably mounted on the 
intermediate portion of the trailer bed 3a. The transformer 6 and the 
power-board 7 are mounted and secured on the rear portion of the trailer 
bed 3a, and each of which is electrically and mechanically connected to 
each by means of connecting member 8. 
In more detail, the interrupter unit 5 is rotatably supported by supporting 
means on the trailer bed 3a of the trailer 3 and is fixed to the trailer 
bed 3a by means of securing means. 
As is shown in FIGS. 1 and 2, the vacuum interrupter 5 comprises the 
operation unit 5a and three-phase current interrupting members 5b provided 
on the operation unit 5a by way of support members in the form of 
supporting insulators 5C spaced apart at a given distance from each. 
The supporting means includes, as is seen in FIGS. 1, and 3, a disc-shaped 
supporting table 9 which is provided on the center portion of the trailer 
bed 3a, a supporting shaft 10 which is provided in the center portion of 
the table 9, a bearing member 11 which is accommodated to the operation 
unit 5a of the vacuum interrupter 5 and a plurality of rollers 12 and 13 
which are attached to the operation unit 5a of the vacuum interrupter 5. 
The securing means comprises a plurality of securing bushes 14 and 15 
fastened to the trailer bed 3a of the trailer 3, a plurality of securing 
metals 18a and 18b fastened to the operation unit 5a of the vacuum 
interrupter 5, and a plurality of bolts 17 for use in fixing the vacuum 
interrupter 5 to the trailer bed 3a of the trailer 3. 
As is best shown in FIG. 3, the disc-shaped supporting table 9 is secured 
on the center portion of the trailer bed 3a, and the supporting shaft 10 
is provided on the center portion of the table 9 to form the supporting 
means. Two pairs of fixed bushes 14 having tapped holes 14a are provided 
symmetrically with respect to the center of the supporting shaft 10 and 
are located around the peripheral portion of the table 9. Further, two 
pairs of fixed bushes 15 having tapped holes 15a are also provided 
symmetrically with respect to the center of the supporting shaft 10 and 
are located at the peripheral portion of the table 9 to form the securing 
means. 
As is shown in FIG. 4, the bearing member 11, having a fitting hole 11a, is 
provided in the lower surface of the operation unit 5a of the interrupter 
5 and is located at the center portion of the lower surface of the 
operation unit 5a to form the rotary means. The pair of rollers 12 are 
provided symmetrically with respect to the bearing member 11 in the lower 
surface of the operation unit 5a to form the rotary and supporting means. 
A pair of supporting plates 18a and 18b are fixed to side-wall of the 
operation unit 5a of the interrupter 5. One roller 13 is mounted on the 
supporting plate 18a, and the other roller 13 is mounted on the supporting 
plate 18b to form a side bearer. Each of the rollers 12 and 13 is located 
on a circular line so as to be situated on the table 9. Two pair of fixing 
plates 16 having fixing holes 16a are secured on the side-walls of the 
operation unit 5a of the interrupter 5 so as to be located to the 
corresponding position of the fixed bushes 14. The operation unit 5a of 
the interrupter 5 is secured to the trailer bed 3a of the trailer 3 by 
fastening the fixing plates to the fixed bushes 14 by means of fixing 
bolts 17. 
Although the rotatable supporting member is comprised by the disc table 9 
provided on the trailer bed 3a of the trailer 3, the supporting shaft 10 
secured to the table 9, the thrust bearing member 11 provided on the 
operation unit 5a of the current interrupting unit 5 and the rollers 12 
and 13 which are provided on the operation unit 5a in the above described 
embodiment, a turntable can be also provided on the trailer bed 3a of the 
trailer 3 to mount and secure the current interrupting unit 5 in the 
present invention. 
In accordance with the transportable power supply substation, constructed 
as described above, the interrupter unit 5 is secured, during transport, 
to the trailer bed 3a by securing means so as to be arranged along with 
the length of the trailer 3, as is shown in FIGS. 1 and 2. The secured 
interrupter unit 5 is supported by the supporting means which comprises 
the supporting table 9 fixed to the trailer bed 3a, the supporting shaft 
10 provided on the center portion of the table 9 so as to project upper 
ward from the table 9, the bearing member 11 provided in the center 
portion of the lower surface of the operation unit 5a by fitting with the 
supporting table 9 and rollers 12 and 13. As is shown in FIG. 2, a 
dimension l.sub.1 of the width smaller than a dimension l.sub.2 of the 
length of in the high voltage three-phase interrupting unit 5. 
Accordingly, the interrupter unit 5 can be laid within the boundary of 
transportation. 
In the actual use of the power suply substation, the fixing bolts 17 are 
taken off from the fixed bushes 14a and 14b. After the fixing bolts 17 are 
unfastened, the interrupting unit 5 is placed in the position of FIG. 5, 
by manually rotating it for 90 degrees angle, as seen in FIG. 5. 
Thereafter, the interrupting unit 5 is fixed to the trailer bed 3a of the 
trailer 3 by fastening the fixing bolts 17 to the fixed bushes 15 as is 
shown in FIG. 5. 
Under the condition that the interrupting unit 5 is fixed in the state 
shown in FIG. 5, the insulation distance is fully obtained from the 
neighbouring electrical devices. Moreover, each of the interrupting 
members 5b is electrically connected to each phase terminal 6a by a lead 
20 and each phase terminal of the disconnecting member 4 is electrically 
connected to the each terminal of the interrupting member 5b. The trailer 
3 of the trailer truck 1 is supported by a fixing device in the form of a 
screw jack 19. 
As is apparent from the foregoing, in accordance with the present 
invention, as the interrupting unit is rotatably mounted on the 
transporting means by the supporting means, it is easy to change the 
mounting direction of the current interrupting unit 5 as occasion demands. 
Accordingly, the power supply substation can be transported with security 
and may be set within the limit of transportation. Since the current 
interrupting unit is rotatably supported by the supporting means 
comprising a bearing member, a pair of rollers provided on the lower 
surface of the operation unit and the other pair of rollers provided on 
the side-bearer, the current interrupting unit can be located easily by 
means of the manual force so that the insulation distance between the 
adjacent electric machines can be obtained by rotating the current 
interrupting unit so as to be directed toward the width direction of the 
transporting device. l 
While the preferred embodiment of invention has been particularly shown and 
described, it will be apparent to those skilled in the art that 
modifications can be made without departing from the principle and spirit 
of the invention, the scope of which defined in the appended claims. 
Accordingly, the foregoing embodiment is to be considered illustrative, 
rather than restricting of the invention and the modification which come 
within the meaning and range of equivalent of the claims are to be 
included herein.