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EP0116748A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

On-load tap changer

Assignee: Mitsubishi Electric Corp
•
Filing: 1983-10-25
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Granted: —
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Expires: 2003-10-25
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Abstract

Abstract An on-load tap changer wherein diverter switch circuits each of which is a series connection of a main switch A, B and an auxiliary switch C, D are connected between an output terminal (13) and a plurality of tap selecting arms (1, 2) and wherein resistors R1, R2 are employed as current-limiting bridge elements. The main switch has a movable contact (7, 8) connected to the output terminal, the auxiliary switch has a movable contact (11, 12) connected to a stationary contact (5, 6) of the main switch and a stationary contact (9, 10) connected to the odd-input terminal (3, 4) and the current-limiting resistors are respectively connected in parallel with the main switches. The switches are preferably vacuum switches.

Inventors

  • 👤 Yuji Mihara
  • 👤 Kazuya Furukawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 07:38
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02; H01F29/04

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 137 words
An on-load tap changer comprising tap selectors (1. 2) connected to an output terminal (13) by respective switch circuits each including a main switch (A, B) in series with an auxiliary switch (C, D) and a current-limiting resistor (R) in parallel with the main switch (A, B), characterised in that in each switch circuit the main switch (A, B) has a movable contact (7, 8) connected to the output terminal (13) and a stationary contact (5, 6) connected to the auxiliary switch (C, D), the current-limiting resistor (R 1 , R 2 ) being connected across these fixed and movable contacts, and the auxiliary switch (C, D) has a stationary contact (9, 10) connected to the tap selector and a movable contact (11, 12) connected to the stationary contact (5, 6) of the main switch (A, B).
Claim 2
Dependent Claim 137 words
An on-load tap changer comprising tap selectors (1. 2) connected to an output terminal (13) by respective switch circuits each including a main switch (A, B) in series with an auxiliary switch (C, D) and a current-limiting resistor (R) in parallel with the main switch (A, B), characterised in that in each switch circuit the main switch (A, B) has a movable contact (7, 8) connected to the output terminal (13) and a stationary contact (5, 6) connected to the auxiliary switch (C, D), the current-limiting resistor (R 1 , R 2 ) being connected across these fixed and movable contacts, and the auxiliary switch (C, D) has a stationary contact (9, 10) connected to the tap selector and a movable contact (11, 12) connected to the stationary contact (5, 6) of the main switch (A, B).
Claim 3
Dependent Claim 23 words
An on-load tap changer according to claim 1 characterised in that the main and auxiliary switches are vacuum switches (Al, Bl, Cl, Dl).

References Cited (Backward Citations)

DE1538262A1 Cited
DE1813871A1 Cited
DE2329072B1 Cited
DE2348091B1 Cited
DE2357209B1 Cited

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