GB925558A - An arrangement for monitoring the operation of tap selector switches - Google Patents
An arrangement for monitoring the operation of tap selector switchesInfo
- Publication number
- GB925558A GB925558A GB28160D GB28160D GB925558A GB 925558 A GB925558 A GB 925558A GB 28160 D GB28160 D GB 28160D GB 28160 D GB28160 D GB 28160D GB 925558 A GB925558 A GB 925558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bus
- current
- bars
- selector switches
- load
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
- B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
- B60L9/24—Electric propulsion with power supply external to the vehicle using ac induction motors fed from ac supply lines
- B60L9/26—Electric propulsion with power supply external to the vehicle using ac induction motors fed from ac supply lines single-phase motors
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
925,558. Control of A.C. motors. LICENTIA PATENT - VERWALTUNGS - G.m.b.H. March 16, 1960 [March 23, 1959], No. 9281/60. Class 38 (3). [Also in Group XXXV] An A.C. traction motor is supplied through bus-bars from a transformer and controlled by a tapchanging mechanism which is monitored by detection of the voltage and current carried by the bus-bars to ensure correct opening and closing of the tap selector switches. Off-load selector switches 7, 8, 11, 12 are connected to bus-bars 5, 6, the currents in which are detected by current transformers 20, 21 connected to indicators or control mechanisms (not shown), which allow a switch to close only when no current flows in the bus-bar to which it is connected. The bus-bar potentials are detected by voltage transformers 15, 16 (or a single transformer connected between the bus-bars, Fig. 2, not shown), which indicate proper closing of a selector switch. The load current path may be divided into two parallel branches each tapping then being provided with two selector switches connected to separate bars 28, 29 or 30, 31. The current transformers 56, 57 and 58, 59 then indicate symmetrical current, loading in the pairs of bus-bars, and may be differentially connected to give zero reading under these conditions (Fig. 3, not shown). Two conditions must be satisfied before a tapping is opened: (a) there must be symmetrical current loading in the bus-bar systems; and (b) the voltage transformers must indicate proper closing of the subsequent selector switches. Transductors 54, 55 may be provided to reduce the current before switching so that on load switches 50, 51, 52, 53 operate substantially off-load and may be omitted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL0032811 | 1959-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB925558A true GB925558A (en) | 1963-05-08 |
Family
ID=7266054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28160D Expired GB925558A (en) | 1959-03-23 | 1960-03-16 | An arrangement for monitoring the operation of tap selector switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB925558A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19837659A1 (en) * | 1998-08-19 | 2000-03-02 | Agfa Gevaert Ag | Device to adjust power output from load during its operation has transformer with two primary-side mains tappings plus further tappings between them, switching device and control device for this |
-
1960
- 1960-03-16 GB GB28160D patent/GB925558A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19837659A1 (en) * | 1998-08-19 | 2000-03-02 | Agfa Gevaert Ag | Device to adjust power output from load during its operation has transformer with two primary-side mains tappings plus further tappings between them, switching device and control device for this |
DE19837659C2 (en) * | 1998-08-19 | 2002-01-10 | Agfa Gevaert Ag | Power adjustment device |
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