JP3298731B2 - Power pole-mounted construction transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a utility pole-mounted construction transformer for use in replacing a transformer mounted on a utility pole without interruption.

[0002]

2. Description of the Related Art A transformer for converting electric power transmitted at a high voltage to a low voltage for home use is mounted on a utility pole. When this transformer is replaced, power can be supplied even during the replacement. Work is done without interruption. In this case, load the temporary transformer on a truck,
The transformer on the utility pole was replaced while transported to the replacement site and parked on the road at the site.

As shown in FIG. 4, a conventional temporary transformer mounted on a truck houses a transformer 2 inside a transformer support case 1 formed of a thick plate. The outside is surrounded by a main body case 3, and a high-voltage load switch 4 connected to the transformer 2 is housed inside the main body case 3 on the right side of the transformer 2 in the drawing, and a high-pressure bushing 5 connected to the switch 4 is further provided with a main body case. 3 projecting from the upper surface.

A circuit breaker 6 for low-voltage wiring and a monitoring mechanism 7 such as a phase detector and a current voltmeter are provided in a main body case 3 on the left side of the transformer 2 in FIG. The high-voltage load switch 4 and the monitoring mechanism 7 are protruded from the upper surface of the case 3 and are arranged side by side with the transformer 2 as a center, and have a horizontally long integrated structure.

This temporary transformer is long in the horizontal direction because the transformer 2, the high-voltage load switch 4 and the monitoring mechanism 7 are integrally arranged in the main body case 3, and is particularly heavy.
The transformer support case 1 for supporting the power supply is made of a thick plate to increase the strength, so that the overall weight is heavy.
For this reason, the temporary transformer has been used while being loaded on a truck bed, and has been working on a road at an exchange site in a state of being parked with a bucket truck on which a worker works. However, in recent years, due to overcrowding of traffic conditions, keeping two cars parked on the road for a long time to replace a transformer has a problem of hindering traffic.

In the conventional temporary transformer, the transformer 2, the high-voltage load switch 4 and the monitoring mechanism 7 are integrally arranged side by side in the main body case 3, and a vent is provided on a side surface of the main body case 3. Although the heat generated from the transformer 2 is
There is also a problem in that the monitoring mechanism 7 such as a phase detector and a current voltmeter is affected by heat inside the device.

[0007]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned disadvantages, makes the temporary transformer small and lightweight, can be stably mounted on a utility pole, eliminates the thermal effect of the monitoring mechanism, and mounts the temporary transformer. It is an object of the present invention to provide a utility pole-mounted construction transformer in which a transformer on a utility pole can be replaced without power interruption without parked on a road for a long time.

[0008]

SUMMARY OF THE INVENTION A utility pole installation type construction according to the present invention.
Transformer is to surround the top and one side of the transformer,
Attach a case with an inverted L-shaped side, and
Section, house the switch and monitoring mechanism to be connected to the transformer.
And a bushing protruding from the upper surface of the case, and
On the exposed side surface of the transformer, an engaging portion that removably engages with a locking tool attached to a utility pole is provided in a protruding manner.

[0009]

[Effect] The utility pole mounting type transformer of the present invention is loaded on a truck bed, goes to the exchange site, and lifts it up.
An engaging portion projecting from a side surface of the transformer is engaged with and supported by a locking tool previously attached to the middle of the utility pole. Thereafter, the truck is moved from the construction site, and only the bucket truck to be operated is left. Next, a cable is connected to the utility pole-mounted construction transformer, the monitoring mechanism checks the connection state of the cable, and then the power source is switched to shut off the power source of the transformer mounted on the utility pole.

[0010] Thereafter, the worker riding on the bucket of the bucket truck removes the transformer mounted on the utility pole and replaces it with a new one. When the replacement work is completed, cut off the circuit of the utility pole-mounted construction transformer. Next, the truck waiting at another location is moved to the site, and then the utility pole-mounted construction transformer is suspended by a bucket, mounted on a carrier, and transported from the site.

An embodiment of the present invention will be described below in detail with reference to FIGS. In the figure, reference numeral 10 denotes a utility pole-mounted construction transformer, in which the transformer 2 is exposed, and fins 11 projecting from the side face come into direct contact with the outside air to radiate heat. Also, as shown in FIG. 2, a case having an inverted L-shaped side surface so as to surround the upper part and one side surface of the transformer 2
13 is attached, and the whole is formed in a rectangular parallelepiped shape. A manual high-voltage load switch 14 is provided on the upper side of the inside of the case 13, and a high-pressure bushing 5 connected to the high-pressure load switch 14 protrudes from the upper surface of the case 13. Further, the high voltage load switch 14 is connected to the transformer 2 via the high voltage protection fuse 12.

Next to the high-voltage load switch 14, there is a phase detector.
A monitoring mechanism 7 such as 15 and a current / voltmeter 16 is provided. A transformer non-voltage tap changer 17 mounted on a side surface of the transformer 2 below the monitoring mechanism 7 is provided in the case 13. A power lamp ground phase switch 18 is mounted beside the transformer no-voltage tap switch 17. As shown in FIG. 3, a circuit breaker 6 for low-voltage wiring is mounted on the upper inside of the case 13, and a low-voltage bushing 8 connected to the circuit breaker 6 for low-voltage wiring protrudes from the upper surface of the case 13.

Further, on the exposed side surface of the transformer 2, an engaging portion 21 is formed in which an inverted U-shaped notch portion 20 is formed in an angle member 19 as shown in FIG. The engaging portion 21 is adapted to engage with a locking member 23 attached to a utility pole 22. In the drawing, reference numeral 24 denotes a lifting hook protruding from the upper surface of the case 13. This utility pole-mounted construction transformer 10 has a weight of 450 kg or less, a height of 1300 mm, a width of 710 mm,
It is vertically long and small and lightweight with a depth of about 630mm.

The utility pole-mounted construction transformer 10 having the above configuration is loaded on a truck bed and goes to the exchange site, where it is hung by hooking a bucket of a bucket truck on a lifting hook 24, as shown in FIG. A locking member 23 previously mounted in the middle of the utility pole 22 is connected to an engaging portion 21 protruding from a side surface of the transformer 2.
Are engaged with and supported by the notched portions 20 having the inverted U-shape. Thereafter, the truck carrying the utility pole-mounted construction transformer 10 is moved from the construction site, leaving only the work bucket truck. Next, a high-voltage cable is connected to the high-voltage bushing 5 with the high-voltage load switch 14 and the low-voltage circuit breaker 6 of the utility pole-mounted construction transformer 10 being cut off, and a high-voltage cable for home use is connected to the low-voltage bushing 8. . Next, after checking the connection state of the cable with the phase detector 15, the low voltage wiring circuit breaker 6 is turned on, and the power of the transformer mounted on the power pole 22 is cut off.

Thereafter, an operator on a bucket of the bucket truck removes the transformer attached to the upper part of the utility pole 22, and replaces the transformer with a new one. When the replacement work is completed, the circuit of the utility pole-mounted construction transformer 10 is cut off. Next, the truck waiting at another place is moved to the site, then suspended by a bucket, placed on this carrier, and transported.

Therefore, the transformer can be replaced while the utility pole-mounted construction transformer 10 is supported in the middle of the utility pole 22, so that the temporary transformer is still loaded on the truck bed as in the prior art. There is no need to park for a long time on the street of the exchange site, so there is no obstacle to traffic. In addition, the utility pole-mounted construction transformer 10 exposes the heaviest transformer 2 and a locking member 23 attached to the utility pole 22 is protruded integrally therewith to directly support it. Since a light high-voltage load switch 14, a low-voltage circuit breaker 6, a monitoring mechanism 7, and the like are mounted, the transformer supporting case 1 formed of a thick plate as in the related art is unnecessary, and the overall weight of the bucket car is reduced. The weight can be reduced to such an extent that the bucket can be lifted.

The transformer 2 has a structure in which three side surfaces are exposed, and the heat generated therefrom is radiated to the atmosphere as it is, and the monitoring mechanism 7 is housed in a case 13 provided separately from the transformer 2. Therefore, the effect of heat generated from the transformer 2 can be prevented. Further, the high voltage load switch 14, the low voltage wiring circuit breaker 6, the monitoring mechanism 7, and the like are mounted on the transformer 2, and the entire structure is vertically elongated.
It has good stability when attached to the unit and does not disturb the work.

[0018]

As described above, according to the utility pole-installed construction transformer according to the present invention, the heaviest transformer is exposed, this is directly supported on the utility pole, and a light switchgear is placed on the transformer. And a monitoring mechanism are attached, the whole is small and lightweight, and there is no need to park the truck on the road for a long time. In addition, since the transformer is exposed, there is no thermal effect on the monitoring mechanism provided in the case, and since it is formed vertically, it has excellent stability when installed on a utility pole, and the transformer on the utility pole is excellent. The safety and workability of the work of replacing the power supply without interruption can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a utility pole-mounted construction transformer according to one embodiment of the present invention is attached to a utility pole.

FIG. 2 is a vertical side view of the utility pole-mounted construction transformer shown in FIG.

FIG. 3 is a rear view of the utility pole-mounted construction transformer shown in FIG. 2;

FIG. 4 is a vertical sectional front view showing a conventional temporary transformer.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Transformer support case 2 Transformer 3 Body case 4 High voltage load switch 5 High voltage bushing 6 Circuit breaker for low voltage wiring 7 Monitoring mechanism 8 Low voltage bushing 10 Power pole mounting type construction transformer 11 Fin 13 Case 14 High voltage load switch 15 Inspection Phase device 16 Current / voltmeter 21 Engagement part 22 Utility pole 23 Locking device

Claims (1)

(57) [Claims] Claims: 1. A transformer surrounds the upper part and one side of a transformer.
Attach a case with an inverted L-shaped side, and
Section, house the switch and monitoring mechanism to be connected to the transformer.
And a bushing protruding from the upper surface of the case, and
An electric pole-attached construction transformer, wherein an engaging portion is provided on an exposed side surface of the transformer so as to removably engage with a locking member attached to the electric pole.