US3681549A - Multi-phase pressure gas insulated metal enclosed switch plant - Google Patents

Multi-phase pressure gas insulated metal enclosed switch plant Download PDF

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Publication number
US3681549A
US3681549A US38229A US3681549DA US3681549A US 3681549 A US3681549 A US 3681549A US 38229 A US38229 A US 38229A US 3681549D A US3681549D A US 3681549DA US 3681549 A US3681549 A US 3681549A
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United States
Prior art keywords
gas
phase
chambers
pressure
metal
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Expired - Lifetime
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US38229A
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English (en)
Inventor
Wolfgang Schmitz
Gerhard Korner
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BBC Brown Boveri AG Germany
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Bbc Brown Boveri & Cie
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/045—Details of casing, e.g. gas tightness

Definitions

  • a pressurized gas insulated switchgear panel includes a pressurized gas chamber enclosing a three-phase bus bar, to which are connected single-phase outlets.
  • Each outlet is divided in succession into a first gas-pressurized isolating switch chamber, a low-pressure chamber and a correlated high-pressure chamber for the phase circuit breaker, a gas-pressurized voltage transformer chamber, a second gas-pressurized isolating switch chamber and finally a further gas-pressurized chamber housing the ground and cable connections.
  • a gas circulating plant including a pump has its high pressure, outlet side connected to the gas chamber enclosing the three-phase bus bar and its low pressure, inlet side connected to the outlet from the ground chambers.
  • three separate gas paths may be established respectively from the gas chamber enclosing the three-phase bus bar through the isolating switch chambers, voltage transformer chamber and ground chamber of each single-phase outlet to the inlet side of the pump.
  • one continuous gas path is established from the gas chamber enclosing the three-phase bus bar through the first isolating switch chambers in series, thence through the voltage transformer chambers in series, thence through the second isolating switch chambers in series and thence through the ground chambers in series to the inlet side of the pump.
  • Relief, i.e., oneway valves are interposed in the gas connections in the series between the various chambers.
  • the high and low pressure gas chambers associated with the respective phase circuit breakers are supplied with the necessary pressurized gas from the pump, or other source through separate circuits.
  • This invention relates to a multiphase, pressure-gas insulated, metal-enclosed switch plant with singlephase outlets.
  • a metal-enclosed, gas pressurized, bus bar chamber contains the bus bars for all phases and single phase outlets are connected to the bus bar chamber.
  • Each outlet comprises a row of metal-enclosed gas pressurized chambers containing the power circuit breaker for the phase and related operating components such as an isolating switch, voltage transformers and ground and cable connections, each housed within a separate chamber and seriately connected between the appertaining bus bar and the phase outlet terminal.
  • the subdivision into individual gas pressurized chambers is effected so that any troubles of an electrical nature as well as troubles, which may be caused by gas impurities or leakage losses, cannot afi'ect the entire plant, and it is thus possible to remove individual operating components separately from the switch plant for inspection, without having to stop the entire plant and making it gas-free.
  • the subdivision into individual gas pressurized chambers requires, however, a complicated pressure monitoring system for the individual gas pressurized chambers which necessitates a great number of pressure monitors or gas density monitors and possibly the connection of several additional gas cylinders for the gas supply.
  • the object of the invention is to permit a gas supply to these gas chambers in such switch plants while maintaining the sectioning into individual gas pressurized chambers, which reduces the risk of contamination of individual gas pressurized chambers and which extends the time intervals for a general overhaul and replenishment of gas, and which also simplifies the monitoring of the pressure in the individual chambers.
  • the advantage achieved with the invention lies particularly in the fact that the inlet and the outlet of the gas chamber row can be connected by a gas-circulating plant consisting substantially of a pump, filter, and dehumidifier.
  • a gas-circulating plant consisting substantially of a pump, filter, and dehumidifier.
  • This circulation of gas is effected over filters and dehumidifiers, so that the risk of contamination or excessive moisture content is reduced to a minimum.
  • a particu- -lar advantage is that this gas circulation can also be effected during the operation without any effect on the operation of the switch plant.
  • a permanent installed gas circulating plant can be used for this purposeor a mobile plant which is only connected in spacial intervals. It also provides the possibility of an extremely simple pressure indication for all gas chambers, which can be effected at the end of the gas chamber row by means of a flowmeter. For checking the gas supply it suffices to start the gas flow through the gas chamber row, and the flowmeter provides information about the gas supply of all gas chambers. Individual monitoring of the gas chambers is thus not necessary. When the operation is started, only this one flowmeter has to be checked, instead of the pressure manometers which would otherwise be required for each individual gas chamber.
  • the gas chamber row of all gas chambers of a switchgear plant according to the invention can preferably be subdivided in a further development of the invention into individual sections which comprise the gas chambers of the operating components of like function of all phases, the adjoining sections being connected over restrictors and/or valves in such a way that with a sudden pressure difference between the sections caused by a breakdown, the pressure equilibrium can only be established with delay.
  • automatic shut-off valves can be provided between the sections which are controlled by pressure monitors in the individual sections, that is, with a sudden pressure loss in one section, the respective pressure monitor controls the shut-off valve arranged in this section and selects this way the fault.
  • the invention benefits from the fact that the switchgear panels of these switch plants are very compact and that the enclosing sections of the individual phases of a switchgear panel are very close together so that the connection of the individual gas chambers over valves or pipe fittings presents no difficulties. For this reason the individual phases of a switchgear can be easily combined in their functions, that is, the singlepole installation of the switchgears used in open air switch plants is not of importance in fully enclosed switch plants, but an embodiment is preferred which is encased individually with regard to phase but combined to a multiphase switchgear with regard to functron.
  • the combination of the gas chambers of the individual phases of a multiphase switchgear on the basis of the single-pole installation of conventional switch plants is not desired, that is, if each phase is to be possibly self-sufficient, a combination of the individual gas chambers of a phase can be readily realized according to the invention.
  • the gas chambers of a phase form a separate gas chamber row, and the parallel-connected gas chamber rows of the individual phases of a switchgear panel have a common inlet and a common outlet.
  • the flow-meter is then arranged preferably at the end of each gas chamber row, since only this way a reliable reading about the pressure supply of all phases can be obtained. When the gas circulation starts, it can be seen on each flowmeter whether the gas is circulated uniformly in all phases.
  • the bus bar corresponding to the individual connected switchgear panels Since it is common in a multipanel switch plant, for reasons of cost, to divide the bus bar corresponding to the individual connected switchgear panels into sections, it may be advisable under certain circumstances not to include the gas chamber of the bus bar in the gas chamber row according to the invention, but to connect it to a separate gas supply. This somewhat more complicated construction results from an increased need for safety, where the bus bars are not to be included in the gas cycle of the individual devices, which can naturally not be as trouble-free as the bus bar itself.
  • the gas chamber of the bus bar extending over several switchgear panels as a common gas line for the connection of the gas chamber rows of the individual panels represents an arrangement which is particularly recommended for low-cost switch plants.
  • gas blast switches with a separate gas cycle consisting of a high pressure part and a low-pressure part
  • the gas supply of the switch will in general not be combined with that of the remaining switch plant, because the gas blast switch requires constant readiness, which necessitates a separate supply and monitoring of the pressure gas, adapted to the conditions of the switch. It may be of advantage, however, to effect the gas-circulation according to the invention in the gas chambers of a switchgear panel combined to a gas chamber row by the compressor, which is anyway required for the gas blast switch.
  • the compressor of the gas blast switch can be connected, for example, over electromagnetic valves to the inlet or outlet of the gas chamber row.
  • FIG. 1 shows in a schematic representation a threephase switchgear panel whose individual gas chambers, with the exception of the chambers comprising the gas blast switch, are combined to a gas chamber row.
  • FIG. 2 shows a three-phase switchgear panel where the gas chambers of a phase form each a separate gas 4. sively into an isolating switch chamber R3, S3, T3, a low-pressure chamber R4, S4, T4 and a high-pressure chamber R5, S5, T5 of the circuit breaker Rl, SL, TL, a voltage transformer chamber R6, S6, T6, another isolating switch chamber R7, S7, T7 as well as a chamber for the ground -and cable terminal R8, S8, T8.
  • the gas chambers of the switchgear panel are connected with each other over valves V1, V2, V3, V4 and pressure gas pipe fittings L to a gas chamber row.
  • V the three isolating switch chambers in the order T3, S3, R3, then over another one-way valve V2 the voltage transformer chambers R6, S6, T6.
  • one-way valve V3 the isolating switchor ground chambers, again in the order T7, S7, R7; and finally over another one-way valve V4 the chambers of the ground-and cable terminals R8, S8, T8.
  • This gas-circulating plant U can be either permanently connected (see FIG. 2) or it can be designed as a mobile gas circulating plantso that the connection can be effected in certain intervals.
  • the valves VA and VE are then designed as corresponding connection points, this being shown schematically in FIG. 1.
  • Characteristic of the example according to FIG. 1 is also the fact that the three operating components with the same function, for example, R3, S3, T3 or R6, S6, T6 of the three phases are combined to a continuous section in the gas chamber row and that each section is separated from the following by a one-way valve Vl V4.
  • connection points G of the gas connecting lines L as instantaneous couplings, for example, permits also any desired bridging of individual sections or gas chambers by flexible gas lines, so that the gas circulation through the remaining gas chamber row is maintained when individual instruments have to be inspected.
  • FIG. 2 shows how the individual gas chambers of each phase RA, SA, TA can form a separate gas chamber row'in a principally similar switch plant, as it is represented in FIG. 1.
  • the gas chambers R3, R6, R7 and R8 are connected over the pipe fittings L as a separate gas chamber row, S3, S6, S7, S8, and T3, T6, T7 and T8 likewise each as a separate gas row chamber.
  • the pressure gas circuit breaker arranged in the two gas chambers R4, R5, S4, S5 and T4, T5 respectively was again not included in the gas chamber row.
  • the three gas chamber rows are provided each with a flowmeter D and then combined over valve VE with the permanently installed gas circulating plant, which is arranged with the other side at the inlet valve VA.
  • VE gas circulation
  • a reliable reading is again obtained about the gas supply in all three phases.
  • no one-way valves are used here between the individual gas chambers but magnetic shut-off valves M1, M2, M3 have been provided between the isolating switch chambers R3, S3, T3 and the voltage transformer chambers R6, S6, T6 which can be automatically controlled over pressure monitors (not represented) or at will.
  • the gas chambers of the voltage transformers R6, S6, T6 can be separated completely from the other gas chambers of the switchgear panel.
  • the pipe fittings L have a sufficient throttling efiect so that the pressure equilibrium between the individual chambers can again be established only with delay, and the sectioning between the individual gas chambers maintains its effect.
  • the embodiment according to FIG. 2 will be used when switch plants with possibly self-sufficient phases are required.
  • FIG. 3 finally shows how-the gas chamber row already described in FIG. 1 can be combined with the gas pressure supply and the pressure gas cycle of the gas blast switch.
  • the gas chamber row between the inlet valveVA and the end valve VB is identical with that according to FIG. 1.
  • a pressure-gas storage Sp is provided here, to which are connected over various shutoff valves V5, V6, V7 and a reducing valve VRI the gas chambers R5, S5, T5 comprising the high-pressure part.
  • the gas of the high-pressure part flows over the switching zones of the circuit breaker into the gas chambers R4, S4, T4 which form the low-pressure part of the circuit breaker.
  • the low-pressure part is then connected over the valves V8, V9, V10 and a filter F with the low-pressure side of a compressor K which pumps the gas from the low-pressure part over a one-way valve V11 back into the storage Sp or directly into the gas chambers R5, S5, T5 of the high-pressure part.
  • the low pressure gas chambers R4, S4, T4 are connected with the storage Sp, over a reducing valve VR2 set to the rated pressure of the low-pressure part, so that the pressure gas can also flow, if necessary, from the storage Sp directly into the chambers R4, S4, T4.
  • the gas supply of the gas chambers l, R3..T8 forming the gas chamber row is coupled with the above described gas supply of the circuit breaker, the inlet valve VA of the gas chamber row being arranged over an additional reducing valve VR3 likewise on the gas storage Sp, or on the high-pressure side of the compressor K.
  • the end or the outlet of the gas chamber row is connected over the outlet valve VE with the low-pressure side of the compressor, the outlet side of the gas chamber row between the two valves V9 and V10 being connected to the line extending from the low-pressure part of the circuit breaker.
  • valves VA, VE, V7, V8, V9 and V10 it is thus possible to operate selectively by means of the compressors, depending on the position of the valves VA, VE, V7, V8, V9 and V10, either the gas cycle in the circuit breaker the valves V6, V7 V8, V9 and V10 must then be open, or the gas cycle in the gas chamber row 1, R3..Ts, in which case the valves VA, VE, V10 and V6 must be open, while the first mentioned valves remain closed.
  • a multi-phase, pressure-gas insulated, metal-em closed switchgear plant comprising a metal-enclosed gas-pressurized chamber for the bus bar of each phase, single phase outlets electrically connected respectively to the corresponding phase bus bar, each said outlet comprising a row of metal-enclosed gas-pressurized chambers containing respectively the power circuit breaker for the phase and related operating components such as an isolating switch, voltage transformer and cable and ground connections and which are seriately connected between the appertaining bus bar and the phase outlet terminal, and means including a gas line arrangement connecting a plurality of said chambers containing said related operating components in series to provide a gas flow therethrough in one direction from a common pressurized gas supply source.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
US38229A 1969-05-30 1970-05-18 Multi-phase pressure gas insulated metal enclosed switch plant Expired - Lifetime US3681549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1927561A DE1927561C3 (de) 1969-05-30 1969-05-30 Mehrphasige druckgasisolierte, metallgekapselte Schaltanlage

Publications (1)

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US3681549A true US3681549A (en) 1972-08-01

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Application Number Title Priority Date Filing Date
US38229A Expired - Lifetime US3681549A (en) 1969-05-30 1970-05-18 Multi-phase pressure gas insulated metal enclosed switch plant

Country Status (7)

Country Link
US (1) US3681549A (enrdf_load_stackoverflow)
CH (1) CH503396A (enrdf_load_stackoverflow)
DE (1) DE1927561C3 (enrdf_load_stackoverflow)
FR (1) FR2043816A1 (enrdf_load_stackoverflow)
GB (1) GB1250309A (enrdf_load_stackoverflow)
NL (1) NL7007698A (enrdf_load_stackoverflow)
SE (1) SE354386B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849618A (en) * 1972-05-16 1974-11-19 Bbc Brown Boveri & Cie Gas supply plant for compressed gas-insulated switchgear
US6664493B2 (en) * 2001-12-18 2003-12-16 Hitachi, Ltd. Gas-insulated switchgear
US20090015991A1 (en) * 2004-06-09 2009-01-15 Maik Hyrenbach Gas-Insulated Switchgear Assembly Having An Inspection Window For Visually Detecting The Switching Position Of The Switching Contacts
US20090166332A1 (en) * 2007-12-28 2009-07-02 Mitsubishi Electric Corporation Gas-insulated switchgear apparatus and gas filter device
CN102142643A (zh) * 2010-12-31 2011-08-03 广东吉熙安电缆附件有限公司 一种电压互感器用连接器
US12249814B2 (en) * 2020-10-22 2025-03-11 Mitsubishi Electric Corporation Valve gas filter and gas-insulated switchgear

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910697C2 (de) * 1989-04-03 1998-07-02 Sachsenwerk Ag Schaltschrank mit druckgasgefüllten Kammern
DE4041790A1 (de) * 1990-12-24 1992-06-25 Sachsenwerk Ag Metallgekapselte, mit einem isolierglas gefuellte schaltanlage
DE19959450B4 (de) * 1999-12-09 2005-10-27 Elpro Gmbh Berlin-Industrieholding- Elektrische Steckverbindung, welche sich während der Montage der isoliergasbefüllten Schaltanlagenkomponenten selbsttätig mit Isoliergas befüllt

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716624C (de) * 1938-02-14 1942-01-24 Tech Pour I Electricite Sa Soc In einem Schrank oder einem gekapselten Kasten untergebrachte Tafel fuer elektrische Apparate
US3129309A (en) * 1960-04-12 1964-04-14 Westinghouse Canada Ltd Temperature-compensated pressure switches for controlling gas blast circuit interrupters
US3230293A (en) * 1963-08-26 1966-01-18 Ite Circuit Breaker Ltd Forced cooled isolated phase bus system using internal blowers
DE1490075A1 (de) * 1963-12-16 1969-05-14 Coq Nv Metallumschlossene Schaltanlage fuer hohe Spannung
US3481393A (en) * 1968-01-15 1969-12-02 Ibm Modular cooling system
US3504268A (en) * 1966-09-15 1970-03-31 Manfred Hoffmann High voltage converter having cooling conduits which grade voltage stress

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716624C (de) * 1938-02-14 1942-01-24 Tech Pour I Electricite Sa Soc In einem Schrank oder einem gekapselten Kasten untergebrachte Tafel fuer elektrische Apparate
US3129309A (en) * 1960-04-12 1964-04-14 Westinghouse Canada Ltd Temperature-compensated pressure switches for controlling gas blast circuit interrupters
US3230293A (en) * 1963-08-26 1966-01-18 Ite Circuit Breaker Ltd Forced cooled isolated phase bus system using internal blowers
DE1490075A1 (de) * 1963-12-16 1969-05-14 Coq Nv Metallumschlossene Schaltanlage fuer hohe Spannung
US3504268A (en) * 1966-09-15 1970-03-31 Manfred Hoffmann High voltage converter having cooling conduits which grade voltage stress
US3481393A (en) * 1968-01-15 1969-12-02 Ibm Modular cooling system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849618A (en) * 1972-05-16 1974-11-19 Bbc Brown Boveri & Cie Gas supply plant for compressed gas-insulated switchgear
US6664493B2 (en) * 2001-12-18 2003-12-16 Hitachi, Ltd. Gas-insulated switchgear
US20090015991A1 (en) * 2004-06-09 2009-01-15 Maik Hyrenbach Gas-Insulated Switchgear Assembly Having An Inspection Window For Visually Detecting The Switching Position Of The Switching Contacts
US9343881B2 (en) 2004-06-09 2016-05-17 Abb Technology Ag Gas-insulated switchgear
US20090166332A1 (en) * 2007-12-28 2009-07-02 Mitsubishi Electric Corporation Gas-insulated switchgear apparatus and gas filter device
US7931741B2 (en) * 2007-12-28 2011-04-26 Mitsubishi Electric Corporation Gas-insulated switchgear apparatus and gas filter device
CN102142643A (zh) * 2010-12-31 2011-08-03 广东吉熙安电缆附件有限公司 一种电压互感器用连接器
US12249814B2 (en) * 2020-10-22 2025-03-11 Mitsubishi Electric Corporation Valve gas filter and gas-insulated switchgear

Also Published As

Publication number Publication date
FR2043816A1 (enrdf_load_stackoverflow) 1971-02-19
NL7007698A (enrdf_load_stackoverflow) 1970-12-02
DE1927561C3 (de) 1974-06-27
CH503396A (de) 1971-02-15
SE354386B (enrdf_load_stackoverflow) 1973-03-05
DE1927561B2 (de) 1973-11-29
DE1927561A1 (de) 1970-12-03
GB1250309A (enrdf_load_stackoverflow) 1971-10-20

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