FR2438902A2 - Adjustable transformer for model railway system - has heating protection, and fuses between arms of output bridge rectifier and secondary tappings - Google Patents

Adjustable transformer for model railway system - has heating protection, and fuses between arms of output bridge rectifier and secondary tappings

Info

Publication number
FR2438902A2
FR2438902A2 FR7925483A FR7925483A FR2438902A2 FR 2438902 A2 FR2438902 A2 FR 2438902A2 FR 7925483 A FR7925483 A FR 7925483A FR 7925483 A FR7925483 A FR 7925483A FR 2438902 A2 FR2438902 A2 FR 2438902A2
Authority
FR
France
Prior art keywords
arms
fuses
bridge rectifier
adjustable transformer
railway system
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
FR7925483A
Other languages
French (fr)
Other versions
FR2438902B2 (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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2438902A2 publication Critical patent/FR2438902A2/en
Application granted granted Critical
Publication of FR2438902B2 publication Critical patent/FR2438902B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The adjustable transformer is used to drive a model electric train system. It prevents serious heating as a result of an internal short-circuit. The short circuit occurs as a result of a defective blocking diode. A bridge rectifier is connected to the secondary winding of the transformer and the output voltage can be switched from half wave to full wave. The second winding is made with tappings based on the full wave rectification. There are fuses connected between the arms of the bridge and in the connection between the arms and the tapping points of the secondary winding. The fuses are in series with the diodes of the bridge rectifier. In the event of an internal short circuit, they will prevent any output from the bridge terminals.
FR7925483A 1978-10-14 1979-10-12 VARIABLE TRANSFORMER FOR ELECTRIC RAILWAYS CONSISTING OF TOYS OR MODELS Expired FR2438902B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782844872 DE2844872A1 (en) 1978-10-14 1978-10-14 ACTUATOR FOR ELECTRIC TOY AND MODEL RAILWAYS

Publications (2)

Publication Number Publication Date
FR2438902A2 true FR2438902A2 (en) 1980-05-09
FR2438902B2 FR2438902B2 (en) 1985-12-20

Family

ID=6052230

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7925483A Expired FR2438902B2 (en) 1978-10-14 1979-10-12 VARIABLE TRANSFORMER FOR ELECTRIC RAILWAYS CONSISTING OF TOYS OR MODELS

Country Status (4)

Country Link
DE (1) DE2844872A1 (en)
FR (1) FR2438902B2 (en)
IT (1) IT1123816B (en)
NL (1) NL7907585A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932781A (en) * 1958-02-28 1960-04-12 Ite Circuit Breaker Ltd Semi-conductor protective means
US2972096A (en) * 1957-11-26 1961-02-14 Smith Corp A O Protection of a temperature sensitive device
CH453491A (en) * 1965-01-26 1968-06-14 Ckd Praha Circuit arrangement for switching the taps of a step transformer with a downstream semiconductor rectifier in a single-phase bridge circuit
FR2090942A5 (en) * 1970-04-30 1972-01-14 Nat Ind As
DE2326608A1 (en) * 1973-05-24 1973-12-06 Sony Corp VOLTAGE SELECTOR

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972096A (en) * 1957-11-26 1961-02-14 Smith Corp A O Protection of a temperature sensitive device
US2932781A (en) * 1958-02-28 1960-04-12 Ite Circuit Breaker Ltd Semi-conductor protective means
CH453491A (en) * 1965-01-26 1968-06-14 Ckd Praha Circuit arrangement for switching the taps of a step transformer with a downstream semiconductor rectifier in a single-phase bridge circuit
FR2090942A5 (en) * 1970-04-30 1972-01-14 Nat Ind As
DE2326608A1 (en) * 1973-05-24 1973-12-06 Sony Corp VOLTAGE SELECTOR

Also Published As

Publication number Publication date
IT7926425A0 (en) 1979-10-11
NL7907585A (en) 1980-04-16
FR2438902B2 (en) 1985-12-20
IT1123816B (en) 1986-04-30
DE2844872A1 (en) 1980-04-30

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