EP1081431A3 - Control device for thermal installations - Google Patents
Control device for thermal installations Download PDFInfo
- Publication number
- EP1081431A3 EP1081431A3 EP00115606A EP00115606A EP1081431A3 EP 1081431 A3 EP1081431 A3 EP 1081431A3 EP 00115606 A EP00115606 A EP 00115606A EP 00115606 A EP00115606 A EP 00115606A EP 1081431 A3 EP1081431 A3 EP 1081431A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- safety
- test
- relays
- voltage change
- safety relays
- 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
- 238000009434 installation Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
- H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/46—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Safety Devices In Control Systems (AREA)
- Control Of Temperature (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Bipolar Transistors (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Resistance Heating (AREA)
- Emergency Protection Circuit Devices (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Für den automatisierten Betrieb von Dampfkesseln und ähnlichen wärmetechnischen Anlagen sind Steuergeräte (1) mit zwei Sicherheitsrelais (9, 10) für die Sicherheitsstromleitung (7) einzusetzen. Das erfindungsgemäße Steuergerät (1) weist zwei zu den Sicherheitsrelais (9, 10) parallele Nebenschlussleitungen (11, 13, 14; 12, 13, 14) auf. Die Sicherheitsrelais (9, 10) weisen Ruhekontakte (17) auf. Zur Prüfung der Schaltfähigkeit werden die Sicherheitsrelais (9, 10) in ihre Ruhestellung umgeschaltet und die Spannungsänderung an ihren Ruhekontakten (17) überwacht. Bei fehlender Spannung ergeht ein Fehlersignal. Während der Prüfung wird die parallele Nebenschlussleitung (11, 13, 14; 12, 13, 14) geschlossen. Die Sicherheitsstromleitung (7) ist daher während der Prüfung nicht unterbrochen. Zur Steuerung der Sicherheitsrelais (9, 10) sind Schaltverstärker (27, 28) mit einer Ansprech- und Aktionszeit vorgesehen, die einen Bruchteil der vorgegebenen Ansprechzeit der Sicherheitsrelais (9, 10) beträgt. Zur Prüfung der elektrischen Ansteuerung werden die Antriebe (21) der Sicherheitsrelais (9, 10) stromlos geschaltet und die Spannungsänderung an den Antrieben (21) überwacht. Bei unzureichender Spannungsänderung ergeht ein Fehlersignal. Die Sicherheitsrelais (9, 10) verharren während dieser Prüfung in ihrer Arbeitsstellung. For the automated operation of steam boilers and similar heat engineering systems, control units (1) with two safety relays (9, 10) are to be used for the safety power line (7). The control unit (1) according to the invention has two bypass lines (11, 13, 14, 12, 13, 14) which are parallel to the safety relays (9, 10). The safety relays (9, 10) have normally closed contacts (17). To test the switching capability, the safety relays (9, 10) are switched to their rest position and monitored the voltage change at its normally closed contacts (17). If there is no voltage, an error signal is issued. During the test, the parallel shunt line (11, 13, 14, 12, 13, 14) is closed. The safety power line (7) is therefore not interrupted during the test. To control the safety relay (9, 10) switching amplifier (27, 28) are provided with a response and action time, which is a fraction of the predetermined response time of the safety relay (9, 10). To test the electrical control, the drives (21) of the safety relay (9, 10) are de-energized and monitored the voltage change to the drives (21). If there is insufficient voltage change, an error signal is issued. The safety relays (9, 10) remain in their working position during this test.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19941022 | 1999-08-28 | ||
DE19941022A DE19941022A1 (en) | 1999-08-28 | 1999-08-28 | Control unit for thermal systems |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1081431A2 EP1081431A2 (en) | 2001-03-07 |
EP1081431A3 true EP1081431A3 (en) | 2003-01-15 |
EP1081431B1 EP1081431B1 (en) | 2008-09-03 |
Family
ID=7920025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00115606A Expired - Lifetime EP1081431B1 (en) | 1999-08-28 | 2000-07-20 | Control device for thermal installations |
Country Status (9)
Country | Link |
---|---|
US (1) | US6507468B1 (en) |
EP (1) | EP1081431B1 (en) |
AT (1) | ATE407329T1 (en) |
BR (1) | BR0003849A (en) |
CZ (1) | CZ298673B6 (en) |
DE (2) | DE19941022A1 (en) |
HU (1) | HU226341B1 (en) |
NO (1) | NO334583B1 (en) |
PL (1) | PL195007B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6742913B2 (en) * | 2001-01-09 | 2004-06-01 | Daniel J. Deutsch | Motion activated decorative light |
DE10127233C1 (en) * | 2001-05-22 | 2002-11-28 | Pilz Gmbh & Co | Safety cut-out switch module for electrical load has 2 alternate load current paths for supplying electrical load each containing 2 series switch elements |
JP5319400B2 (en) * | 2009-05-28 | 2013-10-16 | アズビル株式会社 | Relay error detection device |
DE102016101648A1 (en) | 2016-01-29 | 2017-08-03 | Fresenius Medical Care Deutschland Gmbh | A method of controlling a heating device for heating a fluid for a dialysis fluid circuit, control device and blood treatment device |
CN106452111B (en) * | 2016-11-25 | 2020-06-02 | 山西全安新技术开发有限公司 | Power supply method of intrinsic safety power supply and intrinsic safety power supply system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849990A (en) * | 1954-12-20 | 1958-09-02 | Railway Steam Res Corp | Electrical safety device for steam boilers |
FR1229825A (en) * | 1959-03-14 | 1960-09-09 | Dampferzeuger Veb | Device for controlling and regulating the level of a liquid, in particular for steam boiler tanks, with electronic assembly |
GB1084518A (en) * | 1963-05-09 | 1967-09-27 | Edwin Danks & Company Oldbury | Improvements relating to steam boilers |
US5739504A (en) * | 1995-07-28 | 1998-04-14 | C. Cowles & Company | Control system for boiler and associated burner |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3910118A (en) | 1972-02-02 | 1975-10-07 | Gerdts Gustav F Kg | Probe for controlling the level of electrically conductive liquids |
US3863110A (en) * | 1972-04-21 | 1975-01-28 | Owens Illinois Inc | Apparatus and method for controlling a centrifugal compressor |
US4054935A (en) * | 1976-05-28 | 1977-10-18 | Leon Ginsberg | Safety control circuit |
JPS5332428A (en) * | 1976-09-08 | 1978-03-27 | Hitachi Ltd | Safety check circuit of combustion controlling apparatus |
DE3709059A1 (en) * | 1987-03-19 | 1988-09-29 | Teves Gmbh Alfred | SAFETY RELAY CIRCUIT FOR SWITCHING ON ELECTRIC VEHICLE UNITS |
US5287085A (en) * | 1992-08-26 | 1994-02-15 | At-A-Glance, Inc. | Automatic test and connect electrical power system for anti-lock and conventional brake equipped trailers |
DE9310446U1 (en) * | 1993-03-08 | 1994-07-14 | Landis & Gyr Business Support Ag, Zug | Circuit arrangement for testing switch or relay contacts |
CH688842A5 (en) * | 1994-03-14 | 1998-04-15 | Landis & Gyr Tech Innovat | Means for controlling the motor of the fan of a fan burner. |
-
1999
- 1999-08-28 DE DE19941022A patent/DE19941022A1/en not_active Ceased
-
2000
- 2000-06-27 US US09/604,942 patent/US6507468B1/en not_active Expired - Lifetime
- 2000-07-20 DE DE50015338T patent/DE50015338D1/en not_active Expired - Lifetime
- 2000-07-20 AT AT00115606T patent/ATE407329T1/en not_active IP Right Cessation
- 2000-07-20 EP EP00115606A patent/EP1081431B1/en not_active Expired - Lifetime
- 2000-07-24 HU HU0002871A patent/HU226341B1/en unknown
- 2000-08-25 PL PL342181A patent/PL195007B1/en unknown
- 2000-08-25 CZ CZ20003128A patent/CZ298673B6/en not_active IP Right Cessation
- 2000-08-25 NO NO20004267A patent/NO334583B1/en not_active IP Right Cessation
- 2000-08-28 BR BR0003849-0A patent/BR0003849A/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849990A (en) * | 1954-12-20 | 1958-09-02 | Railway Steam Res Corp | Electrical safety device for steam boilers |
FR1229825A (en) * | 1959-03-14 | 1960-09-09 | Dampferzeuger Veb | Device for controlling and regulating the level of a liquid, in particular for steam boiler tanks, with electronic assembly |
GB1084518A (en) * | 1963-05-09 | 1967-09-27 | Edwin Danks & Company Oldbury | Improvements relating to steam boilers |
US5739504A (en) * | 1995-07-28 | 1998-04-14 | C. Cowles & Company | Control system for boiler and associated burner |
Also Published As
Publication number | Publication date |
---|---|
CZ20003128A3 (en) | 2001-04-11 |
PL342181A1 (en) | 2001-03-12 |
HU226341B1 (en) | 2008-09-29 |
BR0003849A (en) | 2001-04-03 |
EP1081431B1 (en) | 2008-09-03 |
HUP0002871A3 (en) | 2005-01-28 |
NO20004267L (en) | 2001-03-01 |
PL195007B1 (en) | 2007-07-31 |
US6507468B1 (en) | 2003-01-14 |
NO334583B1 (en) | 2014-04-14 |
DE19941022A1 (en) | 2001-03-01 |
NO20004267D0 (en) | 2000-08-25 |
CZ298673B6 (en) | 2007-12-19 |
ATE407329T1 (en) | 2008-09-15 |
HU0002871D0 (en) | 2000-09-28 |
EP1081431A2 (en) | 2001-03-07 |
HUP0002871A2 (en) | 2001-09-28 |
DE50015338D1 (en) | 2008-10-16 |
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