EP1207544A1 - Kontaktzone für einen Leistungsschalter - Google Patents
Kontaktzone für einen Leistungsschalter Download PDFInfo
- Publication number
- EP1207544A1 EP1207544A1 EP00811091A EP00811091A EP1207544A1 EP 1207544 A1 EP1207544 A1 EP 1207544A1 EP 00811091 A EP00811091 A EP 00811091A EP 00811091 A EP00811091 A EP 00811091A EP 1207544 A1 EP1207544 A1 EP 1207544A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- edge
- cover
- contact
- contact zone
- zone according
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7069—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by special dielectric or insulating properties or by special electric or magnetic field control properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
Definitions
- the invention is based on a contact zone for one Circuit breaker according to the preamble of claim 1.
- This circuit breaker has a cylindrical shape Extinguishing chamber on with one in its power path lying contact zone. There are two in the contact zone fixed, arranged on a central axis Burn-off contacts are provided, which in the switched-on state Circuit breaker electrically through a bypass contact are conductively connected.
- the bridging contact is here in the Inside of the rotationally symmetrical erosion contacts arranged. To prevent the radial migration of the To prevent arcing, they are each other facing end faces of the erosion contacts at least partially covered with insulation. Attaching the insulating Coverage is comparatively complex since this cover under the influence of those in the arcing zone prevailing temperatures.
- the invention as characterized in the independent claim is the task, a contact zone for one Circuit breakers to create when insulating covers for the end faces of the erosion contacts is dielectrically favorable trained and easy to assemble.
- This invention starts from the contact zone one arranged rotationally symmetrically about a central axis, with an insulating medium filled extinguishing chamber with at least two fixed, designed as contact rings Burning contacts, which in the closed state of the Extinguishing chamber through a centrally located and axial movable bypass contact electrically connected are, with the facing end faces at least partially covering electrically insulating covers.
- an opening in the radial direction of an outgoing annular gap on an overlying edge of the cover provided with a wedge-shaped cross-section, the edge by means of an annular ring projecting above the contact surface Bead is dielectrically shielded.
- a particular advantage is that the edge is always pressed against the contact surface with spring force, which ensures that no burn-off particles in the Annular gap can get where they are dielectric unfavorable could impact.
- the only figure shows a greatly simplified partial section through the contact zone of a circuit breaker in the switched off state.
- the figure shows a greatly simplified partial section through the contact zone 1 of a circuit breaker when switched off Status.
- Contact zone 1 is part of the power path of the circuit breaker.
- the circuit breaker is not in a shown housing installed, which with a insulating medium is filled.
- This contact zone is 1 arranged rotationally symmetrically about a central axis 2.
- a upper metallic bracket 3 carries an upper contact ring 4, which is made of a burn-resistant metallic material is.
- On one facing away from the central axis 2 A collar 6 is provided on the cylindrical surface 5.
- the upper contact ring 4 Perpendicular to the central axis 2, the upper contact ring 4 has a Contact surface 7 on the central axis 2 side facing away from the dielectric favorably rounded into the Cylinder surface 5 merges.
- the cover 11 is annular trained, it points in the area of coverage Contact surface 7 has a rectangular cross section.
- the the Support surface 7 facing side of the cover 11 is like this shaped so that only the edge 10 rests on it. Between the bearing surface 7 and the side facing it Cover 11 remains an annular gap 11a, one has a wedge-shaped cross section.
- On the rectangular The cross section is a somewhat elastic extension 12 on the outside formed.
- the extension 12 forms a bowl-shaped trained edge that extends upward.
- this extension 12 is not slotted, a stiffer material is used, so axially directed slots are provided in the edge.
- the end of the extension 12 is an undercut 13 attached, which snaps behind the collar 6.
- the cover 11 is by the spring force of the extension 12 against the Support surface 7 pressed and held in position.
- the Extension 12 is also against direct thermal Actions from the direction of the central axis 2 covered, so its spring force, despite that in its vicinity occurring high temperatures, is always preserved.
- the one assigned to this contact zone 1 is almost identical trained counter contact arranged. It consists of one lower metallic bracket 14 which is a lower Contact ring 15 carries, which is made of a burn-resistant metallic Material is made. In the contact ring 15 there is a groove 16 stabbed, one of which faces away from the central axis 2 Flank is provided with an internal thread 17. Perpendicular to the Central axis 2, the lower contact ring 15 has a Contact surface 18 on the central axis 2 side facing away from the dielectric favorably rounded into the other edge of the groove 16 passes over. On the central axis 2 facing side is the bearing surface 18 by a attached, dielectrically favorable bead 19 limited.
- the bead 19 is generally of the same design as the bead 8.
- the bead 19 goes on that of the central axis 2 facing side in a trained as a nozzle constriction 20 Area of the lower contact ring 15 over.
- the jet cone 20 usually has the same cross section as that Jet cone 9.
- the cover 22 is similar to the cover 11, they are ring-shaped has a in the area of coverage of the support surface 18 rectangular cross section. That of the contact surface 18 facing side of the cover 11 is shaped so that only the Edge 21 rests on this. Between the contact surface 18 and the side of the cover 22 facing her remains Annular gap 22a, which has a wedge-shaped cross section. On the rectangular cross section is somewhat elastic on the outside Extension 23 molded. The extension 23 forms one bell-shaped rim that extends downward extends. If the insulating material from which the cover 22nd is sufficiently elastic, so this is Extension 23 not slotted, becomes a stiffer material used, axially directed slots are provided.
- the central one An external thread is provided on the side facing away from axis 2, which in the internal thread 17 of the contact ring 15th is screwed in.
- the cover 22 is by the spring force of the extension 23 pressed against the bearing surface 18 and so held in place.
- the extension 23 is also against direct thermal effects from the direction of the central one Axis 2 covered, so that its spring force, despite the in its high temperatures, always preserved remains.
- the cover 11, like the cover 22, can have a Threaded attachment and the cover can be 22 held with a snap fastening as the cover 11 his.
- the variants of the cover 11 or 22 shown here can also be designed differently. Between two covers 11 and 12 is an annular here Flow gap 24 is provided, when the arc is burning a flow of the heated gas from the arc space 25 allows in the heating volume 26 when blowing the arc , the stored in the heating volume 26 flow pressurized gases in the reverse direction through the Flow gap 24 into the arc chamber 25 and from there further into the exhaust volumes 27 and 28.
- edges 10 and 21 represent a kind of triple points, the very effective due to the metallic beads 8 and 19 be shielded dielectrically.
- the material of the Covers 11 and 22 somewhat due to thermal overload shrink, because of the pretension of the extensions 12 or 23 and because of the wedge-shaped annular gap 11a or 22a between the respective contact surface 7 or 18 and the Cover 11 or 22 ensures that the covers 11 or 22 anyway with an edge on the respective Support surfaces 7 and 18, respectively.
- the annular gap 11a or 22a cannot have a dielectric negative effect Burning particles arrive.
Landscapes
- Circuit Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
- 1
- Kontaktzone
- 2
- zentrale Achse
- 3
- obere Halterung
- 4
- oberer Kontaktring
- 5
- Zylinderfläche
- 6
- Bund
- 7
- Auflagefläche
- 8
- Wulst
- 9
- Düsenengnis
- 10
- Kante
- 11a
- Ringspalt
- 11
- Abdeckung
- 12
- Fortsatz
- 13
- Hinterschneidung
- 14
- untere Halterung
- 15
- unterer Kontaktring
- 16
- Nut
- 17
- Innengewinde
- 18
- Auflagefläche
- 19
- Wulst
- 20
- Düsenengnis
- 21
- Kante
- 22
- Abdeckung
- 22a
- Ringspalt
- 23
- Fortsatz
- 24
- Strömungsspalt
- 25
- Lichtbogenraum
- 26
- Heizvolumen
- 27, 28
- Auspuffvolumen
Claims (6)
- Kontaktzone (1) einer rotationssymmetrisch um eine zentrale Achse (2) angeordneten, mit einem isolierenden Medium gefüllten Löschkammer, mit mindestens zwei feststehenden, als Kontaktringe (4,15) ausgebildeten Abbrandkontakten, welche im geschlossenen Zustand der Löschkammer durch einen zentral angeordneten und axial beweglichen Überbrückungskontakt elektrisch leitend verbunden sind, mit die einander zugewandten Stirnflächen zumindest teilweise bedeckenden elektrisch isolierenden Abdeckungen (11,22), dadurch gekennzeichnet,dass zwischen einer Auflagefläche (7,18) und einer isolierenden Abdeckung (11,22) ein sich in radialer Richtung öffnender, von einer aufliegenden Kante (10,21) der Abdeckung (11,22) ausgehender keilförmiger Ringspalt (11a,22a) vorgesehen ist, unddass die Kante (10,21) mittels einer die Auflagefläche (7,18) überragenden ringförmigen Wulst (8,19) dielektrisch abgeschirmt ist.
- Kontaktzone nach Anspruch 1, dadurch gekennzeichnet,dass die Kante (10,21) in unmittelbarer Nähe der ringförmigen Wulst (8,19) angeordnet ist.
- Kontaktzone nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet,dass die Abdeckung (11,22) im Bereich der Überdeckung der Auflagefläche (7,18) einen rechteckigen Querschnitt aufweist, unddass an diesen rechteckigen Querschnitt aussen ein elastischer Fortsatz (12,23) als Rand angeformt ist, der sich in axialer Richtung erstreckt.
- Kontaktzone nach Anspruch 3, dadurch gekennzeichnet,dass der Rand mit Mitteln versehen ist, die eine mechanische Verbindung der Abdeckung (11,22) mit dem Kontaktring (4,15) erlauben, unddass die mechanische Verbindung so erfolgt, dass stets die Kante (10,21) federnd gegen die Auflagefläche (7,18) gedrückt wird.
- Kontaktzone nach Anspruch 4, dadurch gekennzeichnet,dass die mechanische Verbindung lösbar ausgebildet ist.
- Kontaktzone nach Anspruch 5, dadurch gekennzeichnet,dass als mechanische Verbindung eine Schnappvorrichtung oder eine Verschraubung vorgesehen ist.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50012993T DE50012993D1 (de) | 2000-11-17 | 2000-11-17 | Kontaktzone für einen Leistungsschalter |
EP00811091A EP1207544B1 (de) | 2000-11-17 | 2000-11-17 | Kontaktzone für einen Leistungsschalter |
US09/986,878 US6740837B2 (en) | 2000-11-17 | 2001-11-13 | Contact zone for a power breaker |
JP2001350250A JP3777116B2 (ja) | 2000-11-17 | 2001-11-15 | 電力遮断器用の接触領域 |
RU2001130982/09A RU2273071C2 (ru) | 2000-11-17 | 2001-11-16 | Контактная зона силового выключателя |
CN01130373.5A CN1205635C (zh) | 2000-11-17 | 2001-11-19 | 用于功率开关的接触区 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00811091A EP1207544B1 (de) | 2000-11-17 | 2000-11-17 | Kontaktzone für einen Leistungsschalter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1207544A1 true EP1207544A1 (de) | 2002-05-22 |
EP1207544B1 EP1207544B1 (de) | 2006-06-14 |
Family
ID=8175036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00811091A Expired - Lifetime EP1207544B1 (de) | 2000-11-17 | 2000-11-17 | Kontaktzone für einen Leistungsschalter |
Country Status (6)
Country | Link |
---|---|
US (1) | US6740837B2 (de) |
EP (1) | EP1207544B1 (de) |
JP (1) | JP3777116B2 (de) |
CN (1) | CN1205635C (de) |
DE (1) | DE50012993D1 (de) |
RU (1) | RU2273071C2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1392729B1 (it) * | 2009-01-12 | 2012-03-16 | Bticino Spa | Interruttore elettrico ad elevate prestazioni |
US9012800B2 (en) | 2010-02-04 | 2015-04-21 | Mitsubishi Electric Corporation | Gas circuit breaker |
JP5047406B1 (ja) * | 2012-03-16 | 2012-10-10 | 三菱電機株式会社 | ガス遮断器 |
KR101809385B1 (ko) * | 2013-07-19 | 2017-12-14 | 가부시키가이샤 히타치세이사쿠쇼 | 가스 차단기 |
JP6289856B2 (ja) * | 2013-10-16 | 2018-03-07 | 株式会社東芝 | ガス遮断器 |
JP6382543B2 (ja) * | 2014-03-24 | 2018-08-29 | 株式会社東芝 | ガス遮断器 |
JP6320106B2 (ja) * | 2014-03-25 | 2018-05-09 | 株式会社東芝 | ガス遮断器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3134644A1 (de) * | 1981-08-28 | 1983-03-17 | Siemens AG, 1000 Berlin und 8000 München | Druckgasschalter |
DE3424966A1 (de) * | 1984-07-06 | 1986-01-16 | Siemens AG, 1000 Berlin und 8000 München | Kontaktanordnung fuer gasstroemungsschalter |
EP0283728A1 (de) * | 1987-02-26 | 1988-09-28 | Mitsubishi Denki Kabushiki Kaisha | Druckgas-Lasttrennschalter |
US4843199A (en) * | 1986-12-08 | 1989-06-27 | Bbc Brown, Boveri Ag | Gas-blast circuit breaker |
DE19613568A1 (de) * | 1996-04-04 | 1997-10-09 | Asea Brown Boveri | Leistungsschalter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3431288A1 (de) * | 1984-08-23 | 1986-03-06 | Siemens AG, 1000 Berlin und 8000 München | Kontaktanordnung fuer niederspannungs-leistungsschalter mit einem zweiarmigen kontakthebel |
FR2688625B1 (fr) * | 1992-03-13 | 1997-05-09 | Merlin Gerin | Contact d'un disjoncteur a boitier moule |
US5351024A (en) * | 1993-03-08 | 1994-09-27 | Eaton Corporation | Electrical contactor and interrupter employing a rotary disc |
-
2000
- 2000-11-17 EP EP00811091A patent/EP1207544B1/de not_active Expired - Lifetime
- 2000-11-17 DE DE50012993T patent/DE50012993D1/de not_active Expired - Lifetime
-
2001
- 2001-11-13 US US09/986,878 patent/US6740837B2/en not_active Expired - Lifetime
- 2001-11-15 JP JP2001350250A patent/JP3777116B2/ja not_active Expired - Fee Related
- 2001-11-16 RU RU2001130982/09A patent/RU2273071C2/ru active
- 2001-11-19 CN CN01130373.5A patent/CN1205635C/zh not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3134644A1 (de) * | 1981-08-28 | 1983-03-17 | Siemens AG, 1000 Berlin und 8000 München | Druckgasschalter |
DE3424966A1 (de) * | 1984-07-06 | 1986-01-16 | Siemens AG, 1000 Berlin und 8000 München | Kontaktanordnung fuer gasstroemungsschalter |
US4843199A (en) * | 1986-12-08 | 1989-06-27 | Bbc Brown, Boveri Ag | Gas-blast circuit breaker |
EP0283728A1 (de) * | 1987-02-26 | 1988-09-28 | Mitsubishi Denki Kabushiki Kaisha | Druckgas-Lasttrennschalter |
DE19613568A1 (de) * | 1996-04-04 | 1997-10-09 | Asea Brown Boveri | Leistungsschalter |
Also Published As
Publication number | Publication date |
---|---|
CN1354488A (zh) | 2002-06-19 |
US6740837B2 (en) | 2004-05-25 |
US20020060203A1 (en) | 2002-05-23 |
CN1205635C (zh) | 2005-06-08 |
EP1207544B1 (de) | 2006-06-14 |
JP2002203463A (ja) | 2002-07-19 |
JP3777116B2 (ja) | 2006-05-24 |
RU2273071C2 (ru) | 2006-03-27 |
DE50012993D1 (de) | 2006-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE19717802B4 (de) | Funkenstrecke | |
DE19816505A1 (de) | Leistungsschalter | |
DE19510850C1 (de) | Vakuumschaltröhre | |
DE2934236A1 (de) | Ueberspannungsableiter mit funkenstrecke | |
WO2005122201A1 (de) | Leistungsschalter | |
WO2012010227A1 (de) | Unidirektional schaltendes dc-schütz | |
EP1207544B1 (de) | Kontaktzone für einen Leistungsschalter | |
DE739248C (de) | UEberspannungsableiter | |
DE2441561B2 (de) | Druckgasschalter | |
DE19547098A1 (de) | Leistungsschalter mit einem Einschaltwiderstand | |
EP0568166B1 (de) | Vakuumschaltröhre | |
EP0744759B1 (de) | Hochspannungs-Leistungsschalter mit einem feststehenden Heizvolumen | |
DE4243314A1 (de) | Strombegrenzender Schalter | |
DE2050727C3 (de) | Überspannungsableiteranordnung | |
DE4200896A1 (de) | Hochspannungsleistungsschalter | |
EP2991084B1 (de) | Überspannungsableiter | |
DE3341903A1 (de) | Hochspannungsleistungsschalter | |
DE2619317C2 (de) | Blitzschutzvorrichtung | |
DE6603028U (de) | Druckgasschalter mit mindestens einer innerhalb eines hohlisolators befindlichen schaltstelle. | |
DE824228C (de) | UEberspannungsschutzsicherung | |
DE19543022C1 (de) | Überspannungsschutzelement | |
DE19705158A1 (de) | Vakuumschaltkammer | |
DE2126349C2 (de) | Elektrischer Druckgasschalter | |
DE4337810A1 (de) | Prüfkreis für die synthetische Prüfung von Hochspannungsleistungsschaltern | |
EP0776021A2 (de) | Elektrisches Schaltgerät |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20020927 |
|
AKX | Designation fees paid |
Designated state(s): CH DE FR IT LI SE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR IT LI SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20060614 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 50012993 Country of ref document: DE Date of ref document: 20060727 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20070315 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20081114 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20091126 Year of fee payment: 10 |
|
EUG | Se: european patent has lapsed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101117 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20171121 Year of fee payment: 18 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20171120 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50012993 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190601 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20191120 Year of fee payment: 20 |