GB735908A - Improvements relating to electric protective cut-out arrangements - Google Patents
Improvements relating to electric protective cut-out arrangementsInfo
- Publication number
- GB735908A GB735908A GB705953A GB705953A GB735908A GB 735908 A GB735908 A GB 735908A GB 705953 A GB705953 A GB 705953A GB 705953 A GB705953 A GB 705953A GB 735908 A GB735908 A GB 735908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- earth
- wires
- continuity
- wire
- over
- 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
- 230000001681 protective effect Effects 0.000 title abstract 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for AC systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Control Of Resistance Heating (AREA)
Abstract
735,908. Protective cut-out arrangements. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd. March 5, 1954 [March 13, 1953], No. 7059/53. Class 38 (5). Apparatus 1 fed from line and neutral wires 23, 24, respectively, over a circuit-breaker 16 and plug coupling 11, 12, has its metal casing 2 connected by earth wires 3, 4 to an earthleakage and earth-continuity protective device 13 which is operative at once if the earth continuity is broken or a serious leak occurs, and after a time lag if the leak is moderate. Normally the low-voltage secondary 26 energizes a monitoring relay winding 34 over the earth wires 3, 4, heating coil 35 of a bimetallic switch, and terminals 33, 36 on the earthed frame of the device 13, the contact spring set 20 being thus moved to the left. If a leak occurs such as to produce an excessive voltage on earth wire 3, the trip coil 17 is at once energized therefrom over auxiliary earth 27. With moderate leaks the switch 21 closes to short-circuit the secondary 26 and de-energize relay 34, whereby contacts 20 connect the trip coil 17 to earth 27 directly from the line wire 23. In a modification adapted to transportable apparatus (Fig. 2, not shown), the connection 33 is taken back to the main supply earth to which the earth wire 15 is connected, so including these wires in the earth-continuity protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB705953A GB735908A (en) | 1953-03-13 | 1953-03-13 | Improvements relating to electric protective cut-out arrangements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB705953A GB735908A (en) | 1953-03-13 | 1953-03-13 | Improvements relating to electric protective cut-out arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB735908A true GB735908A (en) | 1955-08-31 |
Family
ID=9825834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB705953A Expired GB735908A (en) | 1953-03-13 | 1953-03-13 | Improvements relating to electric protective cut-out arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB735908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7378761B2 (en) | 2002-08-02 | 2008-05-27 | Protectelec Pty Ltd | Control circuit and a method for electrically connecting a load to a power source |
| GB2491947A (en) * | 2011-06-08 | 2012-12-19 | Ece | System of current protection of a primary electrical distribution box |
-
1953
- 1953-03-13 GB GB705953A patent/GB735908A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7378761B2 (en) | 2002-08-02 | 2008-05-27 | Protectelec Pty Ltd | Control circuit and a method for electrically connecting a load to a power source |
| GB2491947A (en) * | 2011-06-08 | 2012-12-19 | Ece | System of current protection of a primary electrical distribution box |
| GB2491947B (en) * | 2011-06-08 | 2015-05-27 | Ece | System of current protection of a primary electrical distribution box |
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