JPS5485323A - Chopper commutation failure protection system - Google Patents

Chopper commutation failure protection system

Info

Publication number
JPS5485323A
JPS5485323A JP15381277A JP15381277A JPS5485323A JP S5485323 A JPS5485323 A JP S5485323A JP 15381277 A JP15381277 A JP 15381277A JP 15381277 A JP15381277 A JP 15381277A JP S5485323 A JPS5485323 A JP S5485323A
Authority
JP
Japan
Prior art keywords
main circuit
opened
circuit breakers
current
short
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.)
Pending
Application number
JP15381277A
Other languages
Japanese (ja)
Inventor
Takuji Sasaki
Yoshio Maekawa
Masahiro Ashitani
Yoshiharu Hiramatsu
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
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 JAPANESE NATIONAL RAILWAYS<JNR>, Japan National Railways, Mitsubishi Electric Corp filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP15381277A priority Critical patent/JPS5485323A/en
Publication of JPS5485323A publication Critical patent/JPS5485323A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electric Propulsion And Braking For Vehicles (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE: To reduce the breaking duty of main circuit breakers by opening a quidk circuit breaker, a braking resistance short-circuit switch and the main circuit breakers in the order of this saying for protection when the chopper commutation fails.
CONSTITUTION: When the commutation fails due to some cause after a braking resistance BR is short-circuited, the current rising is controlled by a current limiting reactor BSL and the quick circuit breadker HB is opened. Then, a switch L3 for short-circuiting the braking resistance BR is opened to reduce the current further. Thereafter, the main circuit breakers L1, L2 are opened. Since the main circuit breakers L1, L2 are opened after the main circuit current is decreased to a tolerable degree, the breaking duty of the main circuit breakers is reduced.
COPYRIGHT: (C)1979,JPO&Japio
JP15381277A 1977-12-21 1977-12-21 Chopper commutation failure protection system Pending JPS5485323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15381277A JPS5485323A (en) 1977-12-21 1977-12-21 Chopper commutation failure protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15381277A JPS5485323A (en) 1977-12-21 1977-12-21 Chopper commutation failure protection system

Publications (1)

Publication Number Publication Date
JPS5485323A true JPS5485323A (en) 1979-07-06

Family

ID=15570638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15381277A Pending JPS5485323A (en) 1977-12-21 1977-12-21 Chopper commutation failure protection system

Country Status (1)

Country Link
JP (1) JPS5485323A (en)

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