GB740411A - Improvements in or relating to electric protective and control apparatus - Google Patents
Improvements in or relating to electric protective and control apparatusInfo
- Publication number
- GB740411A GB740411A GB19072/53A GB1907253A GB740411A GB 740411 A GB740411 A GB 740411A GB 19072/53 A GB19072/53 A GB 19072/53A GB 1907253 A GB1907253 A GB 1907253A GB 740411 A GB740411 A GB 740411A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- conductor
- circuit
- voltage source
- higher voltage
- 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
- 239000004020 conductor Substances 0.000 abstract 9
- 230000000694 effects Effects 0.000 abstract 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/04—Distributing means for power supply in mines
- E21F17/06—Distributing electric power; Cable networks; Conduits for cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Keying Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
740,411. Protective cut-out arrangements. SIEMENS - SCHUCKERTWERKE AKT.- GES. July 9, 1953 [July 9, 1952], No. 19072/53. Class 38(5) In a control and protective arrangement, e.g. for use with mining installations, D.C. sources 5, 6 having voltages of different magnitudes are connected in opposition at the ends of a pilot conductor 8 and an earth conductor E, a polarized relay 4 being connected in series with the pilot conductor adjacent the lower voltage source 5 and control switches 10a, 10e being associated with the higher voltage source. In Fig. 1, on the depression of the "on switch" 10e, current flows from the higher voltage source 6 through the relay 4 which closes contacts 12 to effect the closing of a circuitbreaker 2. A relay 14 is now energized and closes contacts 13 to maintain the pilot circuit closed when the switch 10e is released. In the event of a short-circuit between the conductors 8, E, current flows from the source 5 in the reverse direction through the relay 4 and fault path 7 and the relay 4 closes contacts 11 to effect the opening of the circuit-breaker 2. The D.C. sources may be batteries as shown, but rectifier arrangements may be used, Fig. 2 (not shown). Alternatively, charged condensers may be used as the higher voltage source, the condensers being initially charged from the low voltage source and subsequently maintained charged by a rectifier arrangement supplied from the power conductors, Figs. 3 and 4 (not shown). The higher voltage source may only be connected to the conductor 8 during the actual closing operation of the circuit-breaker 2. In this case, the relay 4 controls the circuit-breaker through a relay which completes a holding circuit for itself when energized, Fig. 6 (not shown). When the supply is from a transformer having its star point connected through a resistor to the conductor E, the relay 4 may be arranged to produce tripping on fault between a main conductor and the conductor E, a by-pass circuit for the alternating current being provided, Fig. 5 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE740411X | 1952-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB740411A true GB740411A (en) | 1955-11-09 |
Family
ID=6643632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19072/53A Expired GB740411A (en) | 1952-07-09 | 1953-07-09 | Improvements in or relating to electric protective and control apparatus |
Country Status (5)
Country | Link |
---|---|
BE (3) | BE520957A (en) |
DE (1) | DE963451C (en) |
FR (3) | FR1096829A (en) |
GB (1) | GB740411A (en) |
NL (1) | NL87233C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE969427C (en) * | 1954-08-29 | 1958-05-29 | Telefonbau & Normalzeit Gmbh | Device for remote control and feedback of monitored adjustable organs |
DE1051367B (en) * | 1957-05-20 | 1959-02-26 | Licentia Gmbh | Protection circuit for lighting systems, especially for underground operations |
-
0
- BE BE529349D patent/BE529349A/xx unknown
- BE BE529570D patent/BE529570A/xx unknown
- BE BE520957D patent/BE520957A/xx unknown
-
1953
- 1953-06-20 DE DES33952D patent/DE963451C/en not_active Expired
- 1953-06-24 FR FR1096829D patent/FR1096829A/en not_active Expired
- 1953-07-09 NL NL179717A patent/NL87233C/xx active
- 1953-07-09 GB GB19072/53A patent/GB740411A/en not_active Expired
-
1954
- 1954-06-02 FR FR66890D patent/FR66890E/en not_active Expired
- 1954-06-18 FR FR67137D patent/FR67137E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL87233C (en) | 1957-05-09 |
BE520957A (en) | |
FR66890E (en) | 1957-10-31 |
BE529349A (en) | |
FR67137E (en) | 1957-11-22 |
DE963451C (en) | 1957-05-09 |
FR1096829A (en) | 1955-06-27 |
BE529570A (en) |
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