EP1081431A3 - Control device for thermal installations - Google Patents

Control device for thermal installations Download PDF

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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
Application number
EP00115606A
Other languages
German (de)
French (fr)
Other versions
EP1081431B1 (en
EP1081431A2 (en
Inventor
Jürgen Klattenhoff
Günter Schmitz
Joachim-Christian Politt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gestra GmbH
Original Assignee
Gestra GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gestra GmbH filed Critical Gestra GmbH
Publication of EP1081431A2 publication Critical patent/EP1081431A2/en
Publication of EP1081431A3 publication Critical patent/EP1081431A3/en
Application granted granted Critical
Publication of EP1081431B1 publication Critical patent/EP1081431B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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)
  • Control Of Resistance Heating (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Control Of Eletrric Generators (AREA)
  • Bipolar Transistors (AREA)
  • Regulation And Control Of Combustion (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.

Figure 00000001
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.
Figure 00000001
EP00115606A 1999-08-28 2000-07-20 Control device for thermal installations Expired - Lifetime EP1081431B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19941022A DE19941022A1 (en) 1999-08-28 1999-08-28 Control unit for thermal systems
DE19941022 1999-08-28

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 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.

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
NO20004267D0 (en) 2000-08-25
EP1081431B1 (en) 2008-09-03
CZ20003128A3 (en) 2001-04-11
HU0002871D0 (en) 2000-09-28
HUP0002871A3 (en) 2005-01-28
HUP0002871A2 (en) 2001-09-28
NO20004267L (en) 2001-03-01
EP1081431A2 (en) 2001-03-07
BR0003849A (en) 2001-04-03
CZ298673B6 (en) 2007-12-19
DE50015338D1 (en) 2008-10-16
PL195007B1 (en) 2007-07-31
DE19941022A1 (en) 2001-03-01
US6507468B1 (en) 2003-01-14
HU226341B1 (en) 2008-09-29
ATE407329T1 (en) 2008-09-15
NO334583B1 (en) 2014-04-14
PL342181A1 (en) 2001-03-12

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