GB2477737A - Fire prevention system triggering a residual current device - Google Patents
Fire prevention system triggering a residual current device Download PDFInfo
- Publication number
- GB2477737A GB2477737A GB1002219A GB201002219A GB2477737A GB 2477737 A GB2477737 A GB 2477737A GB 1002219 A GB1002219 A GB 1002219A GB 201002219 A GB201002219 A GB 201002219A GB 2477737 A GB2477737 A GB 2477737A
- Authority
- GB
- United Kingdom
- Prior art keywords
- item
- residual current
- trigger
- smoke
- heat
- 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.)
- Withdrawn
Links
- 230000002265 prevention Effects 0.000 title abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 20
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 238000010616 electrical installation Methods 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 241000283984 Rodentia Species 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A fire prevention system is disclosed that operates a residual current detection RCD device in a mains distribution board of an existing electrical installation. The residual current detection device is triggered based on a change in an environmental condition, such as that detected by a conventional heat or smoke detector. This results in all power to the installation being turned off. The triggering device may be connected in circuit via a suitable electrical plug in connection utilising existing socket outlets in the electrical installation.
Description
FIRE PREVENTION SAFETY TRIGGER
The invention relates to a device that can operate a fault current detection device when triggered by a change in environmental condition such as heat or a smoke detected by an appropriate sensor utilising existing wiring and circuits.
The smoke/heat alarm or other appropriate sensor and the fault current detection trip are commercially available devices but are not specifically designed to be combined as a safety feature.
The objective of the invention is to use the safety characteristics of these devices in a unique way by combining them to provide a method of power disconnection when environmental conditions change.
One example of the benefit of the invention could be if the device was installed in the loft of a building that was constructed with a thatched roof. This method of building construction often encourages vermin or rodents to inhabit the area and can result in fire risk due to damaged wiring caused by the vermin or rodents. In the event that the damaged wiring becomes a source of smoke and or heat generation the invention could disconnect the power supply to the wiring before combustion occurs.
A preferred embodiment of the invention will now be described with reference to the accompanying drawings in which Figure 1 is a block diagram showing several heat or smoke alarms (items 1,2,3,4 and 5) that have been fitted with the invention and are connected to selected protective fault current detection devices (items 7 and 8) by means of the existing mains wiring (an example is item 25).
The key to the items illustrated in figure 1 are as follows Item 1 Is a heat or smoke alarm device that has been fitted with a nominal 3Omiiliamp trigger module and connected into a lighting circuit.
Item 2 represents a heat or smoke alarm device that has been fitted with a nominal 3Oiuilliamp trigger module and is connected into a lighting circuit.
Item 3 represents a beat or smoke alarm device that has been fitted with a nominal lOOmilhiamp trigger module and is connected into a lighting circuit.
Item 4 represents a heat or smoke alarm device that has been fitted with a nominal lOOmilliamp trigger module and is connected into a lighting circuit.
Item 5 represents a heat or smoke alarm device that has been fitted with a nominal lOOmiliamp trigger module and is connected via a suitably fused plug to a mains power point.
Item 6 represents a mains power distribution board.
Item 7 represents a 100-milhiamp residual current device.
ItemS represents a 30-milliamp residual current device.
Item 9 represents a 32amp circuit breaker.
Item 10 represents a Samp circuit breaker.
Item 24 represents the mains supply incoming meter.
Item 25 represents an example of the existing building wiring.
Figure 2 is a diagram showing the relationship of a specified value trigger device (item 13) connected to a smoke or heat alarm with a relay output (item 12) and supplied by a mains power safety disconnect device with a matching trip value (item 11).
The key to the items illustrated in figure 2 are as follows Item 11 represents a 30 milliamp residual current device.
Item 12 represents a heat or smoke alarm with a relay output facility.
Item 13 represents a nominal 30milhiamp trigger device.
Item 14 represents a fuse that is sized to allow the operation of item 13 without rupturing.
Item 15 represents a resistance that is calibrated to satisfy the operational (trip) characteristics of the residual current device (item 11).
Item 25 represents an example of the existing building wiring.
Figure 3 is a diagram showing the relationship of a multi -selectable trigger device (item 18) connected to a smoke or heat alarm with a relay output (item 17) and supplied by a mains power safety disconnect device (iteml6).
The key to the items illustrated in figure 3 are as follows.
Item 16 represents a 300millamp residual current device.
Item 17 represents a heat or smoke alarm with a relay output facility.
Item 18 represents a manual multi-selectable trigger device switched to include item 23 as the selected calibrated trigger.
Item 19 represents a fuse that is sized to allow the operation of item 18 without rupturing when item 20 is set in any position.
Item 20 represents a manually set selector switch.
Item 21 represents a resistance that is calibrated to satisfy the operational (trip) characteristics of a 3Omillamp residual current device.
Item 22 represents a resistance that is calibrated to satisfy the operational (trip) characteristics of a lOOmillamp residual current device.
Item 23 represents a resistance that is calibrated to satisfy the operational (trip) characteristics of a 300millamp residual current device.
Item 25 represents an example of the existing building wiring.
Preferably the invention is to be installed in a mains powered smoke or heat alarm incorporating a relay feature (An example is figure 1, item 1) and supplied by a mains circuit trip device that is current operated (figure 1, item 8).
Figure 1 shows that several alarm devices can be fitted with the invention to operate separate or common safety trips or residual current devices.
Once fitted with the invention an alarm can be wired into an appropriate electrical circuit to provide automatic disconnection of the circuit when smoke or beat is detected.
The speed of disconnection is determined by the manufacturer of the residual current protective device.
Figure 1 shows the heat or smoke device (item 3) fitted with a nominal 100 milliamp trigger that will operate the 100 milliamp residual current device (item 7) via the Samp circuit breaker (item 10) installed in the mains distribution board (item 6). This will result in all the power to the installation being turned off.
Figure 1 shows the heat or smoke device (item 1) fitted with a nominal 30 milhiamp trigger that will operate the 30 milliamp residual current device (item 8) installed in the mains distribution board (item 6). This will result in the power provided through the 30 milliamp residual current device (item 8) being isolated without effecting the other circuits supplied from the mains distribution board (item 6).
The safety trigger device when installed or incorporated in a fire protection device can be portable and can be connected in circuit by means of a suitable electrical plug in connection.
This is achieved by using existing socket outlets or connectors and the existing mains wiring subject to phase, neutral and earth conductors being present.
Figure 2 shows the electrical connection of a fused and calibrated resistor trigger (item 13) to a smoke or heat detector fitted with a relay output (item 12) and supplied by a residual current protective device (item 11).
Preferably the value of the fuse rating (item 14) affords operation of the trigger device (item 13) without rupture of the fuse (item 14) but will provide disconnection of the resistor (item 15) hi the event of excessive trigger current.
Preferably the value of the resistor (item 15) will be selected to provide sufficient trigger current to operated the residual current protective device (item 11) without rupturing the fuse (item 14).
Figure 3 shows the electrical connection of a fused and selectable resistor network (item 18) to a smoke or heat detector fitted with a relay output (item 17) and supplied by a residual current protective device (item 16).
Preferably the safety trigger (item 18) can be manually switched (via item 20) to provide a calibrated trigger value that matches the residual current protective device operating value (item 16).
Preferably the value of the fuse rating (item 19) affords operation of the trigger device (item 18) without rupture of the fuse (item 19) but will provide disconnection of the resistors (items 21,22 and 23) in the event of excessive trigger current.
Preferably the value of the resistors (item 21,22 and 23) will be selected and manually switched into circuit (via item 20) to provide sufficient trigger current to operated the residual current protective device (item 16) subject to its operating requirements without rupturing the fuse (item 19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1002219A GB2477737A (en) | 2010-02-10 | 2010-02-10 | Fire prevention system triggering a residual current device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1002219A GB2477737A (en) | 2010-02-10 | 2010-02-10 | Fire prevention system triggering a residual current device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201002219D0 GB201002219D0 (en) | 2010-03-31 |
| GB2477737A true GB2477737A (en) | 2011-08-17 |
Family
ID=42110490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1002219A Withdrawn GB2477737A (en) | 2010-02-10 | 2010-02-10 | Fire prevention system triggering a residual current device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2477737A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931733A (en) * | 2012-11-19 | 2013-02-13 | 上海市电力公司 | Residual current remote data collection and operation monitoring system |
| US11361926B2 (en) * | 2016-04-29 | 2022-06-14 | Hong Cheng | Apparatus, system and method for alarm triggered electrical supply disconnection |
| WO2023211311A1 (en) * | 2022-04-29 | 2023-11-02 | ГАБЛИЯ, Юрий Александрович | Circuit breaker with fire-extinguishing aerosol generator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508568A (en) * | 1994-05-10 | 1996-04-16 | Mammen; Alex | Receptacle safety deenergizer |
| WO1999052090A1 (en) * | 1998-04-06 | 1999-10-14 | Antti Kaarnamo | Method for switching off a power supply in a dangerous situation and a corresponding safeguarding arrangement |
| GB2438252A (en) * | 2005-10-01 | 2007-11-21 | Philip Marson | Fire alarm isolates power circuits |
| GB2457639A (en) * | 2007-09-28 | 2009-08-26 | Graham Chilvers | Power control apparatus |
| AU2008203195A1 (en) * | 2008-07-17 | 2010-02-04 | Steven Heymann | A power shutdown system |
| AU2009217424A1 (en) * | 2008-09-22 | 2010-04-08 | Jayzi Innovations Pty Ltd | Switch board smoke detector monitoring system |
-
2010
- 2010-02-10 GB GB1002219A patent/GB2477737A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508568A (en) * | 1994-05-10 | 1996-04-16 | Mammen; Alex | Receptacle safety deenergizer |
| WO1999052090A1 (en) * | 1998-04-06 | 1999-10-14 | Antti Kaarnamo | Method for switching off a power supply in a dangerous situation and a corresponding safeguarding arrangement |
| GB2438252A (en) * | 2005-10-01 | 2007-11-21 | Philip Marson | Fire alarm isolates power circuits |
| GB2457639A (en) * | 2007-09-28 | 2009-08-26 | Graham Chilvers | Power control apparatus |
| AU2008203195A1 (en) * | 2008-07-17 | 2010-02-04 | Steven Heymann | A power shutdown system |
| AU2009217424A1 (en) * | 2008-09-22 | 2010-04-08 | Jayzi Innovations Pty Ltd | Switch board smoke detector monitoring system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931733A (en) * | 2012-11-19 | 2013-02-13 | 上海市电力公司 | Residual current remote data collection and operation monitoring system |
| CN102931733B (en) * | 2012-11-19 | 2015-10-28 | 上海市电力公司 | A kind of residual current remote data acquisition and operation monitoring system |
| US11361926B2 (en) * | 2016-04-29 | 2022-06-14 | Hong Cheng | Apparatus, system and method for alarm triggered electrical supply disconnection |
| WO2023211311A1 (en) * | 2022-04-29 | 2023-11-02 | ГАБЛИЯ, Юрий Александрович | Circuit breaker with fire-extinguishing aerosol generator |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201002219D0 (en) | 2010-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |