JPS5457139A - Secondary winding shortage accident detector for network transformer - Google Patents

Secondary winding shortage accident detector for network transformer

Info

Publication number
JPS5457139A
JPS5457139A JP12374777A JP12374777A JPS5457139A JP S5457139 A JPS5457139 A JP S5457139A JP 12374777 A JP12374777 A JP 12374777A JP 12374777 A JP12374777 A JP 12374777A JP S5457139 A JPS5457139 A JP S5457139A
Authority
JP
Japan
Prior art keywords
accident
current
secondary winding
network transformer
power factor
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
JP12374777A
Other languages
Japanese (ja)
Inventor
Junichi Mino
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.)
Mitsubishi Electric Corp
Original Assignee
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12374777A priority Critical patent/JPS5457139A/en
Publication of JPS5457139A publication Critical patent/JPS5457139A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To enable detection of the secondary winding shortage accident for a network transformer regardless of the amplitude of the current in the accident by detecting the occurrence of the accident by the power factor of the current.
CONSTITUTION: Since the respective power factor relays 6-1 to 6-2 and network protector reverse current breakage are correlated at timing, a network protector connected to the accident circuit detects the reverse current to thereby trip with a protector breaker PC-11. Then, the accident currents if2, if3 are vanished to flow only the accident current if1, which is monitored by the relay 6-1 for detecting that the value of the delayed power factor of the accident circuit reaches less than predetermined value to thereby detect the secondary winding accident shortage of the network transformer NT-11 so as to generate a trip command to the corresponding primary feeder breaker 3-1 in order to thereby disconnect the accident point from the system
COPYRIGHT: (C)1979,JPO&Japio
JP12374777A 1977-10-14 1977-10-14 Secondary winding shortage accident detector for network transformer Pending JPS5457139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12374777A JPS5457139A (en) 1977-10-14 1977-10-14 Secondary winding shortage accident detector for network transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12374777A JPS5457139A (en) 1977-10-14 1977-10-14 Secondary winding shortage accident detector for network transformer

Publications (1)

Publication Number Publication Date
JPS5457139A true JPS5457139A (en) 1979-05-08

Family

ID=14868315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12374777A Pending JPS5457139A (en) 1977-10-14 1977-10-14 Secondary winding shortage accident detector for network transformer

Country Status (1)

Country Link
JP (1) JPS5457139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013027072A (en) * 2011-07-15 2013-02-04 Kyocera Corp Power control apparatus and power control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013027072A (en) * 2011-07-15 2013-02-04 Kyocera Corp Power control apparatus and power control method

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