GB1189274A - Static Time-Lag Relays - Google Patents

Static Time-Lag Relays

Info

Publication number
GB1189274A
GB1189274A GB30257/68A GB3025768A GB1189274A GB 1189274 A GB1189274 A GB 1189274A GB 30257/68 A GB30257/68 A GB 30257/68A GB 3025768 A GB3025768 A GB 3025768A GB 1189274 A GB1189274 A GB 1189274A
Authority
GB
United Kingdom
Prior art keywords
voltage
voltage drop
emitter
switching
base
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.)
Expired
Application number
GB30257/68A
Inventor
Stig Aviander
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1189274A publication Critical patent/GB1189274A/en
Expired 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
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/292—Modifications for introducing a time delay before switching in thyristor, unijunction transistor or programmable unijunction transistor switches

Landscapes

  • Relay Circuits (AREA)

Abstract

1,189,274. Transistor time delayed switches. ALLMANNA SVENSKA ELEKTRISKA A.B. 2 June, 1968 [27 June, 1967], No. 30257/68. Heading H3T. A time delay circuit comprisesabridge having timing arms C, R and potentiometer arms P, a transistor controlling a relay L and having its emitter base path connected across the diagonal 6, 3 and a resistor R1 chosen such that the voltage drop across R1 when the transistor starts to conduct is equal to the voltage drop across the diagonal containing the emitter-base path. The resistor R1 allows the minimum time delay to be reduced below a value corresponding to the time to charge the capacitor to a value equal to the emitter-base threshold. As shown, the current producing the voltage across R1 is the charging current and this is supplemented at switching by positive feedback current from T2. When the circuit is switched off, the relay coil L is discharged through R1 and D and this provides feedback to speed the switching off. In Fig. 2 a diode D3 protects T1 against excessive reverse voltage and the voltage drop across R1 also compensates for the diode voltage drop. The relay is controlled by a thyristor Ty which provides feedback through D1 and C to the base of T1 to speed switching. In addition, the thyristor, when conducting, reduces the voltage at the upper terminal of potentiometer P to a value equal to the voltage across D4 so that there is no voltage across P and resetting is independent of the position of the slider. Diodes D4 also provide temperature compensation.
GB30257/68A 1967-06-27 1968-06-25 Static Time-Lag Relays Expired GB1189274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE09213/67*A SE331853B (en) 1967-06-27 1967-06-27

Publications (1)

Publication Number Publication Date
GB1189274A true GB1189274A (en) 1970-04-22

Family

ID=20276137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30257/68A Expired GB1189274A (en) 1967-06-27 1968-06-25 Static Time-Lag Relays

Country Status (7)

Country Link
US (1) US3532939A (en)
CH (1) CH470071A (en)
DE (1) DE1763563B2 (en)
FR (1) FR1571777A (en)
GB (1) GB1189274A (en)
SE (1) SE331853B (en)
YU (1) YU32184B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723827A (en) * 1972-02-11 1973-03-27 Griswold Controls Selective and sequential control system
DE3131563C2 (en) * 1981-08-08 1983-12-01 Leopold Kostal GmbH & Co KG, 5880 Lüdenscheid Warning device with an acoustic and / or optical signal generator
US4652769A (en) * 1984-02-14 1987-03-24 Ion Tech, Inc. Module power supply
US5719738A (en) * 1994-12-27 1998-02-17 General Electric Company Circuit breaker remote closing operator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906926A (en) * 1957-01-07 1959-09-29 Bendix Aviat Corp Time delay circuit
US3049627A (en) * 1957-06-17 1962-08-14 Martin Marietta Corp Electrical timing circuit
US3355632A (en) * 1964-10-21 1967-11-28 Gen Time Corp Electronic timer circuit

Also Published As

Publication number Publication date
YU32184B (en) 1974-06-30
CH470071A (en) 1969-03-15
US3532939A (en) 1970-10-06
SE331853B (en) 1971-01-18
DE1763563A1 (en) 1971-05-13
YU149268A (en) 1973-12-31
DE1763563B2 (en) 1971-12-30
FR1571777A (en) 1969-06-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees