US3590320A - Voltage transformer with removable high voltage fuses - Google Patents

Voltage transformer with removable high voltage fuses Download PDF

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Publication number
US3590320A
US3590320A US767383A US3590320DA US3590320A US 3590320 A US3590320 A US 3590320A US 767383 A US767383 A US 767383A US 3590320D A US3590320D A US 3590320DA US 3590320 A US3590320 A US 3590320A
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United States
Prior art keywords
transformer
fuse
container
voltage
upper cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US767383A
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English (en)
Inventor
Robert Conroi
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Individual
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Individual
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Publication date
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Publication of US3590320A publication Critical patent/US3590320A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/102—Fuses mounted on or constituting the movable contact parts of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H01H2085/0291—Structural association with a current transformer

Definitions

  • the present invention is concerned with a voltage transformer assembly comprising a high-voltage fuse with high shutoff power which can be insulated from the high-voltage network without additional means and is intended to serve as a power transformer or as a voltage measuring transformer.
  • This transformer can be designed for primary voltagesof from one thousand to several tens of thousands of volts.
  • the secondary voltages delivered can be of any value.
  • This apparatus can accordingly serve to measure voltages on high or middle voltages by connecting the secondary with a voltmeter, or a wattmeter or to feed devices which require a power of several thousands of watts.
  • Voltage transformers with fuses incorporated therein are known. They have for their purpose to avoid, in case of a flaw, the explosion of the transformer which might cause serious damage in the prefabricated high-voltage cell or in the transformer station where the apparatus is located.
  • This apparatus is characterized by the fact that-its fuse 3 with high shutoff power can be extracted directly by means of an original arrangement which makes it possible to carry out all measurements on the transformer without shutting off voltage ofa set of bars or on the network. 7
  • This transformer can be made as a voltage transformer or with a single insulated pole, with two insulated poles, with three insulated poles, without changing the principle thereof,
  • FIG. 1 is a side view partially in section of a transformer and fuse assembly in accordance with the invention.
  • FIG. 2 is a cross section taken on the line 2-2 in'FIG. 1.
  • FIG. 3 is a partial section taken on the line 3-3 in FIG. 1.
  • FIG. 4 is a partial end view taken from the right in FIG. 1 with the fuse removed.
  • FIG. 5 is an end view from the left in FIG. 1 with a portion shown in cross section, and
  • FIG. 6 is a view similar to FIG. 1 showing a modification.
  • FIG. 1 In the embodiment of FIG. 1, there is shown a voltage transformer with insulated pole.
  • this voltage transformer is protected by a high-voltage fuse which is directly removable under voltage.
  • the transformer and fuse assembly is constituted by the three following elements:
  • the fuse container which is removable under voltage.
  • the movable and removable transformer unit 26 comprises a core of magnetic sheets 18 of rectangular shape with one side resting on base 27 and the other supporting the windings. These comprise, starting from the core towards the exterior, a frame 19 carrying a low-voltage winding 20 separated from the high-voltage winding 22 by an insulated tube 21.
  • the transformer windings and core are enclosed in a synthetic resin casing having a cylindrical nose portion.
  • One of the ends of the low-voltage winding 20 issues at terminal 29 while the other extremity issues at terminal 31 after passing through a low-voltage fuse the fuse holder of which is mechanically integral with the removable container 8 to permit shutting off simultaneously the high-voltage feed and the low-voltage circuit when the container 8 is removed.
  • the high-voltage winding 22 has an extremity 30 which is connected to the ground.
  • the other extremity fed with high voltage is connected to a sleeve 17 positioned at the extremity of a cylindrical portion which forms the nose of the transformer casing.
  • the container holder 1, also of synthetic resin is secured by several bolts on the metallic wall 4 of a high-voltage cell according to FIGS. 1 and 5. This securing can be fluidtight in the case where the high tension bars are immersed in oil. There is thus obtained a fluidtight connection of the voltage terminals.
  • a drop bolt 14 ensures the fluidtightness of the front part of the container holder.
  • the container holder 1 comprises at its lower part a lower cylinder in the bottom of which is located a plug 16 connected by a copper connection to a ring 7.
  • the latter is located in the upper cylinder intended to receive the removable container 8 'and constitutes the upper part of the container holder.
  • the removable container 8 also made of synthetic resin has the shape of a cylinder closed at one end by a cover 10 secured by screws 9 equipped with a handle 11. It slides in two groove as shown in FIG. 4. It extends as a half cylinder containing fuse 3 and terminates by a metallic ring 2 which is screwed on.
  • FIGS. 2, 3 and 4 show different cross sections of the container and the container holder and of the high-voltage fuse 3.
  • Fuse 3 is positioned between the high-voltage line and the beginning of the high-voltage wiring 22 and is removable. It is provided at its rear part with two flexible supports 5 equipped with a silver stud 6 ensuring contact with ring 7,as shown in FIG. 3. The front part of fuse 3 terminates in a sleeve 12 which fits a plug 13 integral with the fluidtight drop bolt 14, connected to the set of high-voltage bars. Sleeve 12 is centered relative to ring 2 by a jaw 15 according to FIG. 2.
  • Fluidtightness is ensured on the metallic wall 4 by the small collar of the container holder.
  • the synthetic resin of the container holder ensures fluidtightness on part 14.
  • the container 8 is removed and locked out by the stud of part 24 which is in raised position.
  • the lower part of the locking means 24' being then withdrawn in its housing, transformer 26 is fitted in and its nose (FIG. 1) carrying sleeve 17 fits on the plug 16 V in the lower cylinder of the container holder.
  • the locking means 24 are unlocked and fall back into lowered position preventing removal of transformer 26.
  • the stud of locking means 24 which lowers in the wall of the container holder and makes it possible thus to insert the fuse 3 by pushing on the handle 11 until cover 10 of container 8 conlows:
  • the removable movable transformer 126 has in its rear part a lock 137 permanently secured by construction. It immobilizes in connected position the transformer 126 on container holder 101.
  • the container holder 101 comprises in its rear part a permanent lock 134.
  • This lock uses the same key 135 as lock 137.
  • This key 135 can only be turned if the container 108, is in a well-defined geometric position.
  • the part 136 is integral with container holder 10].
  • Removable container 108 has on its rear part a metallic flange 110 equipped with a handle 111. On this flange are located contacts which close the secondary circuit 120 of the transformer when the container 108 is closed position in accordance with the drawing. i
  • parts 102-1 -132-107-1 16 and l 17 are electrically connected to the ground by parts 1 9:13? an it is only then that it is possible to remove key 135 from lock 134.
  • Key 135 goesin lock 137 and the transformer 126 is then freed by unlocking lock 137 from piece 136. Transformer 126 .is then removed by pulling to the rear.
  • the present assembly makes it possible to replace the transformer without shutting off voltage on the network.
  • a transformer assembly comprising an elongated insulated container including an upper cylinder and a lower cylinder, each of said cylinders having a closed end and an open end; a contact ring recessed peripherally in said upper cylinder intermediate its ends; a metallic ring within said upper cylinder at said closed end thereof; an insulated fuse holder slidably mounted in said upper cylinder and including a semicircular fuse holding portion secured to said metallic ring and a cylindrical portion closed by a cover abutting the open end of said upper cylinder; a fuse in said fuse holding portion connected to a high-voltage source and with said contact ring; an electrical contact at the closed end of said lower cylinder, a transformer comprising an insulated casing having a nose portion slidably received in said lower cylinder, windings enclosed in said casing including a high-voltage winding and a low-voltage winding and a contact on said nose portion connected with said high-voltage winding and engageable with said contact of said lower cylinder to connect said high-voltage
  • a transformer assembly according to claim 2, wherein said locking means comprises a first lock for locking said transformer on said container and a second lock for locking said fuse holder onto said container, said locks being operated by a key normally in said second lock and removable therefrom to open said first lock only when said fuse holder and said transformer are grounded to permit removal of said transformer from said assembly.
  • a transformer assembly according to claim 3 comprising means for positioning said fuse holder in a partially withdrawn position in which said key is removable from said second lock.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Regulation Of General Use Transformers (AREA)
US767383A 1967-10-19 1968-10-14 Voltage transformer with removable high voltage fuses Expired - Lifetime US3590320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR125688 1967-10-19

Publications (1)

Publication Number Publication Date
US3590320A true US3590320A (en) 1971-06-29

Family

ID=8640639

Family Applications (1)

Application Number Title Priority Date Filing Date
US767383A Expired - Lifetime US3590320A (en) 1967-10-19 1968-10-14 Voltage transformer with removable high voltage fuses

Country Status (4)

Country Link
US (1) US3590320A (enrdf_load_stackoverflow)
ES (1) ES359250A1 (enrdf_load_stackoverflow)
FR (1) FR1560289A (enrdf_load_stackoverflow)
GB (1) GB1250177A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4268106A (en) * 1979-10-30 1981-05-19 The Singer Company Fuse holder assembly
CN104616874A (zh) * 2015-02-14 2015-05-13 云南电网有限责任公司带电作业分公司 一种电压互感器保护装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829312A (en) * 1956-11-14 1960-03-02 British Thomson Houston Co Ltd Improved fuse arrangement particularly for high voltage transformers
US3007125A (en) * 1958-02-20 1961-10-31 Gen Electric Inductive device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829312A (en) * 1956-11-14 1960-03-02 British Thomson Houston Co Ltd Improved fuse arrangement particularly for high voltage transformers
US3007125A (en) * 1958-02-20 1961-10-31 Gen Electric Inductive device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4268106A (en) * 1979-10-30 1981-05-19 The Singer Company Fuse holder assembly
CN104616874A (zh) * 2015-02-14 2015-05-13 云南电网有限责任公司带电作业分公司 一种电压互感器保护装置

Also Published As

Publication number Publication date
ES359250A1 (es) 1970-07-01
FR1560289A (enrdf_load_stackoverflow) 1969-03-21
GB1250177A (enrdf_load_stackoverflow) 1971-10-20

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