JPS58168208A - On-load tap-changing transformer - Google Patents

Abstract

PURPOSE:To obtain economical on-load tap-changing transformer which has succeeded in reduction of dead space through effective use of space within the premises by employing such structure that the circuit breaker of changeover switch is taken in or out at the side of bottom plate of bag-shaped extruded part of transformer tank. CONSTITUTION:An on-boad tap changer 3 to be accommodated in the bag- shaped extruded part 1a comprises a changeover switch 4 provided on the bottom plate 21a of the bag-shaped extruded part 1a and a tap selector 6 which is provided on said switch and is connected with a lead 2c extended from tap winding within a transformer 2. Said changeover switch 4 and the tap selector 6 are coupled for the specified operations and are operated by an electric operating mechanism 9 and a bevel gear 7 provided at the outside of a side plate 31a of the bag-shaped extruded part 1a through an operating shaft 8 coupled, at the outside of said bag-shaped extruded part 1a, to the lower part of the changeover switch 4. At the time of periodical check of changeover switch 4, the circuit breaker 5 of changeover switch 4 is taken in and out to/from the bottom plate 21a of the bag-shaped exstruded part 1a.

Description

[Detailed description of the invention] [Technical field of the invention] 0.4. ,・This invention works well under load! Switching transformer - Qin.

[Background technology of the invention and its Q-threshold difficulties] ・91, The high voltage and large capacity of the transformer will be increased according to the demands of the times.
One side that is cutting the steel meat is touched when under load! In the auxiliary equipment of ＠transformers and transformers, PL and P have become smaller due to improvements in performance, insulation technology, etc. due to the increase in size due to the increase in capacity. When converting the entire transformer into a single unit, the optimal design is to consider the placement of the attached equipment and not create any space. In recent years, the guidelines for making transformers incombustible have increased by 9, and the demand for compactness of the entire equipment has increased by 1.5 for gas-insulated load tap/switching transformers installed in the basements of buildings. By the way, the conventional F switching transformer at O load is the first one.
Figures and 11N2. WAK shows a lot of space (has a lot of space), and is satisfied with the 11iIII structure, which is longer than 9.

Reference numeral 1 designates an entrainer main link, which stores the transformer contents 2 flowing from the four iron cores 2a and the windings jb inside, and has a nine-bag-shaped protrusion la on the upper side of the side that stores the I-tube during load. Kirikiki 1
It is stored, stored and organized. The on-load tag changeover J is a changeover switch 4 having an interruption part 5 for interrupting current flow and the changeover of the changeover! It is installed at the bottom of 4, and the transformer and body 2!
It is provided with a tap selector σ to which the lead 2e drawn out from the turn 7 is connected, and the switching switch 5 and the tag selector C are arranged outside the transformer mentor 1 and configured to perform a predetermined operation. It is operated by an electric operating mechanism 9 via a pinion gear device 1 and a transmission shaft 8. When such an I-segment insulation load is applied, an f-switching transformer is installed and operated in the basement of a building or the like. Then, use the lifting hook 11 provided on the ceiling JOIIC to lift the switching switch 4 and suspending part 5, and hang it on an appropriate floor 12 to perform periodic inspections of the switching switch. Guarantees safe driving.

However, under such a load! , f switching transformer, when inspecting the switching switch 4, the interruption part 5 of the switching switch 4
When it is necessary to lift the cable upward, the height must be set at nine, taking into consideration the dimensions of the building's ceiling IO line. However, the space required to lift it during normal operation is absolutely necessary, and the space becomes extremely hot.

Transformer L lid 10 that houses the 9 load ta, f switching @S
A space 13 is constructed 1m below the central exit part, and the ζO airspace 11 is completely decommissioned. The drawback was that the construction costs were high.

[Invention 01i] This Ii@ was made to eliminate the drawbacks of the above Il, and effectively utilizes the space in the building.
4- When the load can be configured inexpensively by reducing the number of bases to 1! The purpose is to provide horn switching transformers.

[11! 01 EI] Achieving the target ■ Rounding and actual line transformer The load switching device is installed on the bottom plate of the bag-shaped protrusion that is provided on the upper side of the transformer mentor so as to protrude laterally. The switching switch is equipped with a switching opening/closing device, and the Meppu IIRIiF is arranged on the ζO switching switch, and the interrupting part of the switching switch is configured to be inserted and removed on the bottom plate side of the bag-shaped protrusion.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In the figure, reference numeral 1 denotes a transformer tank, in which the transformer contents 2 are stored and an insulating medium such as insulating gas or insulating oil is sealed.

A bag-shaped protrusion 1 & which protrudes laterally is formed on the upper side of the transformer tank 1, and this bag-shaped protrusion s1
Under load, an f-switching device 3 is housed in a. During load, the main and f switching AS1 is installed on the bag-shaped protrusion 1aO and the bottom plate 11m, and is connected to the nine switching switch 4, and the switching switch AS1 is arranged on this switching switch 4 and is pulled out from the main f* wire of the transformer contents 2. /2@
The switching switch 4 and the door selection II 6 are connected so that a predetermined operation can be performed, and the bag-like protrusion $J a () is connected to the outside. 1o1111 - The operating shaft 1 can be connected to the lower part of the closing device 4 and the bag-shaped protrusion via the gear r can be connected to the operating shaft 1
It is operated by an electric operating mechanism IK provided on the outer surface of a. Momo 11m1IIIF! When inspecting the adjustment of the device 4097, twisting and switching flHM@40 is performed by inserting and removing it from the bottom plate 11 side of the bag-shaped protrusion 7m.

If the configuration is as shown in g15 and
At the 40g period, it is better to lower the suspended part I of the inspection ladder downward without lifting it upwards, and then move it to a place where inspection work* can be performed. By lowering the temperature to the minimum necessary level, there is no need for fog or hanging odors.

The lower O-deato space of the bag-shaped protrusion 1a of the transformer lII ink 1 can be effectively used when inspecting the interruption part 50, so the height of the ceiling mentioned above can be kept low. Combined with this, it becomes possible to use the construction farming space for a minimum of 4 crops. Special Kf・? ′ When the load is insulated,! This is effective when installed in underground substations such as switching transformers.

Furthermore, the electric operating mechanism 9 is provided at a height that can be operated by a worker, and the transmission shaft 1 connected thereto has a bag-shaped protrusion Jm.
Since the bottom plate 11a of the
It is no longer necessary to arrange the transmission shaft long from the upper part to the lower part of the m-pressure vessel member 1, and it can be manufactured at low cost.

〔Effect of the invention〕

As explained above, according to the present invention, the switching switch O is used on the bottom plate side of the bag-like protrusion of the pressure regulator tank to take in and out the interrupted part, so the space inside the building can be effectively utilized. It is possible to provide an inexpensive on-load tap switching transformer that requires less space.

[Brief explanation of the drawing]

No. 111 is a plan view showing a conventional load-operated, f-switching pressurizer, and FIG. FIG. 3 is a cross-sectional view taken at B5 and viewed in the direction of the arrow, showing the main part of a load-mode switching device according to an embodiment of the present invention.
) is the Dansokaku. Switching switch, s-L interruption section, C...tap selector, r-
・Power offset gear, I-・Transmission shaft, t...Electric operation mechanism, 10...Ceiling, Jl...Floor-0 Applicant's Attorney Soto Bento Attorney Suzue Takehiko Figure 1 Figure 3a

Claims (1)

[Claims] A bag-shaped protrusion projecting laterally is provided on the upper side of the transformer tank for storing the contents of the transformer inside, and the inside of the bag-like protrusion K has a switching switch having an interruption part and the contents of the transformer. The device is equipped with a tag selector to which a lead pulled out from the cod f-volume is connected, and stores a nine-load tap changer, in which the changeover switch is disposed on the bottom plate of the bag-shaped protrusion, and the changeover The fi, f selector is disposed on the switch, and when the switching switch is interrupted, the switch is inserted and removed on the bottom plate side of the bag-shaped central exit part. Switching transformer・・・