FR2424580A1 - DEVICE FOR ELECTRICAL CONTROL OF PRESS SAFETY VALVES - Google Patents

DEVICE FOR ELECTRICAL CONTROL OF PRESS SAFETY VALVES

Info

Publication number
FR2424580A1
FR2424580A1 FR7907136A FR7907136A FR2424580A1 FR 2424580 A1 FR2424580 A1 FR 2424580A1 FR 7907136 A FR7907136 A FR 7907136A FR 7907136 A FR7907136 A FR 7907136A FR 2424580 A1 FR2424580 A1 FR 2424580A1
Authority
FR
France
Prior art keywords
relays
limit switches
safety valves
press safety
lines
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
FR7907136A
Other languages
French (fr)
Other versions
FR2424580B1 (en
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.)
SPINDLER DEISSLER STARKSTROM
Original Assignee
SPINDLER DEISSLER STARKSTROM
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 SPINDLER DEISSLER STARKSTROM filed Critical SPINDLER DEISSLER STARKSTROM
Publication of FR2424580A1 publication Critical patent/FR2424580A1/en
Application granted granted Critical
Publication of FR2424580B1 publication Critical patent/FR2424580B1/fr
Granted 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
    • H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other

Abstract

The press safety valves are equipped with limit switches (16, 17) which are open in the normal position and are simultaneously triggered by the valve tappets. The limit switches (16, 17) are situated in a self-monitoring control circuit with relays (11-15, 30) which are arranged in parallel lines (6-10, 37) between two supply lines (4, 5). When the current is switched on at the supply lines (4, 5), two of the relays (13, 14) are switched on and keep themselves locked. A further relay (30) only releases the output (22, 23) when current reaches it and both limit switches (16, 17) are closed, in this sequence. If another sequence is followed, owing to tampering or switching errors, or if there are malfunctions within the control system, e.g. due to defective lines, relays, relay points or short circuits, the output (22, 23) is blocked.
FR7907136A 1978-04-26 1979-03-21 DEVICE FOR ELECTRICAL CONTROL OF PRESS SAFETY VALVES Granted FR2424580A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782818173 DE2818173B1 (en) 1978-04-26 1978-04-26 Arrangement for electrical monitoring of press safety valves

Publications (2)

Publication Number Publication Date
FR2424580A1 true FR2424580A1 (en) 1979-11-23
FR2424580B1 FR2424580B1 (en) 1984-07-06

Family

ID=6037990

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907136A Granted FR2424580A1 (en) 1978-04-26 1979-03-21 DEVICE FOR ELECTRICAL CONTROL OF PRESS SAFETY VALVES

Country Status (4)

Country Link
CH (1) CH644303A5 (en)
DE (1) DE2818173B1 (en)
FR (1) FR2424580A1 (en)
SE (1) SE417361B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619723A1 (en) * 1986-06-12 1987-12-17 Kloeckner Moeller Elektrizit Additional controller, having contacts, for safety circuits
ES2089274T3 (en) * 1992-04-13 1996-10-01 Schneider Electric Gmbh MONITORING A SIGNAL CHANGE, ESPECIALLY IN SELF-CONTROLLED CONTROL SYSTEMS.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2447123A1 (en) * 1974-10-02 1976-04-08 Herion Werke Kg Press valve checking circuit - has spindles of independent operating valves probed by proximity arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Néant *

Also Published As

Publication number Publication date
SE7806345L (en) 1979-10-27
SE417361B (en) 1981-03-09
CH644303A5 (en) 1984-07-31
DE2818173B1 (en) 1979-03-29
FR2424580B1 (en) 1984-07-06

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Legal Events

Date Code Title Description
ST Notification of lapse