WO2017158508A1 - Alarme incendie intelligente pour tableaux électriques basse tension - Google Patents

Alarme incendie intelligente pour tableaux électriques basse tension Download PDF

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Publication number
WO2017158508A1
WO2017158508A1 PCT/IB2017/051467 IB2017051467W WO2017158508A1 WO 2017158508 A1 WO2017158508 A1 WO 2017158508A1 IB 2017051467 W IB2017051467 W IB 2017051467W WO 2017158508 A1 WO2017158508 A1 WO 2017158508A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat detection
detection cable
linear heat
low voltage
controller
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.)
Ceased
Application number
PCT/IB2017/051467
Other languages
English (en)
Inventor
Matar Suhail Salem AL MEHAIRI
Islam Fakhri Mohd ABUHAMDAH
Usama Omar Mohamed Klf RADWAN
Awad Mahmoud Ibrahim ALJAWAWDEH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dubai Electricity and Water Authority
Original Assignee
Dubai Electricity and Water Authority
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dubai Electricity and Water Authority filed Critical Dubai Electricity and Water Authority
Priority to ATA9004/2017A priority Critical patent/AT520898B1/de
Priority to GB1708993.9A priority patent/GB2550498B/en
Publication of WO2017158508A1 publication Critical patent/WO2017158508A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • A62C37/46—Construction of the actuator
    • A62C37/48—Thermally sensitive initiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • 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
    • H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
    • G01K2003/145—Hotspot localization

Definitions

  • the present invention relates to a fire prevention system and method for low voltage electrical panels. Such panels are commonly used in electrical distribution substations.
  • fire warning or detection systems are commonly used, such as e.g. heat detectors, fixed temperature detectors, smoke detectors, ionization smoke detectors, photoelectric beam smoke detectors, laser smoke detectors, spot type detectors or flame detectors. All these devices are only able to react to a fire after it has started, e.g. after a certain minimum amount of smoke has been produced. Preventive, proactive measures are thus not possible.
  • rate-of-rise detectors or spot heat detectors can be used.
  • spot heat detectors can only cover a single heat source each.
  • an object of the present invention to provide a smart, improved fire warning system and method suitable for low voltage electrical panels.
  • a fire prevention system for a low voltage electrical panel comprising a voltage source; a controller for triggering fire alarm proce- dures; and at least one linear heat detection cable; wherein the at least one linear heat detection cable is configured for covering all parts of the low voltage electrical panel that can form heat sources; and wherein a first conductor of the linear heat detection cable is connected to the voltage source and a second conductor of the linear heat detection cable is connected to an input of the controller; such that the controller will trigger fire alarm proce- dures if the linear heat detection cable is tripped.
  • a linear heat detection cable consists of two electrical conductors insulated electrically and thermally by polymer plastic. The insulation melts at a temperature threshold predetermined by the cables' manufacturers, resulting in an electrical contact being made.
  • Such a system can detect a heat buildup in the low voltage electrical panel (which may cause a fire), and can thus raise an alarm before a fire occurs. Repairs can then be carried out in time, preventing the fire and saving assets and possibly even lives.
  • the system is moreover simple to install and operate, and offers very low maintenance costs, since linear heat detection cables are almost maintenance-free.
  • the second linear heat detection cable has a higher temperature threshold than the first linear heat detection cable; wherein a first conductor of the second linear heat detection cable is connected to the voltage source and a second conductor of the second linear heat detection cable is connected to a second input of the controller; and wherein the controller is configured to trigger a first alarm procedure if the first linear heat detection cable is tripped, and a second alarm procedure if the second heat detection cable is tripped.
  • the first linear heat detection cable triggers an advance warning that part of the panel is overheating
  • the second linear heat detection cable triggers a more serious warning that severe overheating is occurring, which would probably lead to a fire without direct intervention.
  • the controller is configured to electrically disconnect at least the low voltage electrical panel if the second heat detection cable is tripped. This is an important safety measure and also might reduce heat buildup in the panel.
  • a third linear heat detection cable is provided; wherein the third linear heat detection cable is configured to be routed around the surroundings of the low voltage electrical panel in order to detect fire originating outside the panel; and wherein the controller is configured to trigger a third alarm procedure if the third heat detection cable is tripped.
  • Such an arrangement allows to separately detect fires that originate from outside the panel, thus allowing for different alarm procedures appropriate to the respective situation.
  • the knowledge of the origin of the fire may additionally be of value for insurance purposes or in legal disputes.
  • the temperature threshold of the first linear heat detection cable is preferably 105 °C; and the temperature threshold of the second and third linear heat detection cables is preferably 138 °C.
  • the object of the invention is further achieved by an electrical low voltage panel comprising a fire prevention system as described above.
  • a panel preferably operates at voltages between 300 and 500 V and can be employed advantageously in an electrical distribution substation.
  • the object of the invention is further achieved by a method for fire prevention in a low voltage electrical panel, comprising the following steps: A voltage source, a controller for triggering fire alarm procedures, and at least one linear heat detection cable are provided. Said at least one linear heat detection cable is arranged to cover all parts of the low voltage electrical panel that can form heat sources, especially the load feeders.
  • a first conductor of the linear heat detection cable is connected to the voltage source, and a second conductor of the linear heat detection cable is connected to an input of the controller. If a voltage is applied to said input of the controller, fire alarm procedures are triggered.
  • a second linear heat detection cable having a higher temperature threshold than the first linear heat detection cable is provided. Said second linear heat detection cable is arranged alongside the first linear heat detection cable. A first conductor of the second linear heat detection cable is connected to the voltage source and a second conductor of the second linear heat detection cable is connected to a second input of the controller. A first alarm procedure is triggered if the first linear heat detection cable is tripped, and a second alarm procedure is triggered if the second heat detection cable is tripped.
  • at least the low voltage electrical panel is electrically disconnected if the second heat detection cable is tripped.
  • a third linear heat detection cable is provided.
  • This third linear heat detection cable is arranged around the surroundings of the low voltage electrical panel.
  • a first conductor of the third linear heat detection cable is connected to the voltage source and a second conductor of the third linear heat detection cable is connected to a third input of the controller.
  • a third alarm procedure is triggered if the third heat detection cable is tripped, indicating a fire originating from outside the panel. It has proven advantageous to provide the first linear heat detection cable with a temperature threshold of preferably 105 °C and, if desired, to provide second and third linear heat detection cables with temperature thresholds of preferably 138 °C.
  • Fig. 1 shows a schematic of the control circuit of a fire warning system according to an embodiment of the invention.
  • the system aims to prevent a fire in, for example, electrical low voltage panels (400 V) in electrical distribution substations (e.g. 300 kVA to 1500 kVA; 22/1 1/6.6-0.4 kV) by detecting unusual heat buildup at an early stage, i.e. before the fire has started. If required, it can also disconnect the electricity power supply.
  • the system may comprise the following components, as shown in Fig. 1 :
  • the DC converter 70 may include a battery charger, and a rechargeable battery 60 for power supply in the event of outages may also be provided.
  • Linear heat detection cables 10, 20, 30 comprise two electrical conductors insulated electrically and thermally by polymer plastic. The insulation breaks at a temperature threshold predetermined by the cables' manufacturers.
  • the cables typically have temperature thresholds of 105 and 138 °C. They can be arranged to cover all parts of a low voltage electrical panel that can form heat sources, especially all the load feeders.
  • This electrical panel contains as its main component a controller 50 with a set of inputs and outputs, which is able to communicate with e.g. a SCADA (supervisory control and data acquisition) or SMS (safety management system) system. It may further contain or be connected to a voltage source as described above.
  • SCADA supervisory control and data acquisition
  • SMS safety management system
  • a 6 A molded case circuit breaker (MCCB) 90 may also be provided to protect the components of the control panel from overloads or short circuits.
  • Two linear heat detection cables 10, 20 are arranged in the low voltage distribution panel. They can be arranged, for example, either horizontally or vertically, in such a way that they match the internal layout of the panel. Typically, this arrangement is per electrical phase, i.e. in a common three-phase system, six such cables are used.
  • the linear heat detection cables are routed such that they pass by all possible sources of heat that could cause a fire, e.g. all the load feeders. They may also be routed past all areas containing flammable material (if present).
  • the two cables have different temperature thresholds: a 105 °C cable 10 is used for early stage warning, while a 138 °C cable 20 is used for a second stage warning.
  • a third linear heat detection cable 30 may be routed around the interior of the electrical distribution substation (i.e. outside the low voltage panel) in order to be able to detect fire sources external to the low voltage panel.
  • a first conductor is connected to a voltage source 70 and a second conductor is connected to a corresponding controller 50 input.
  • the controller 50 then initiates an alarm procedure, typically either a SCADA or an SMS alarm notification, informing about overheating inside the low voltage distribution panel.
  • the controller 50 then initiates a second alarm procedure, typically either a SCADA or an SMS alarm notification, informing about extreme overheating inside the low voltage distribution panel.
  • the controller 50 may also be configured to remotely switch off the electrical power supply to the low voltage panel in this situation.
  • a third alarm procedure typically either a SCADA or an SMS alarm notification, informing about a fire originating outside the low voltage electrical panel.
  • the low voltage distribution panel may have a panel door switch 40 for security purposes.
  • the panel door switch 40 can be connected to a further input of the controller 50, in order to indicate when the access door to the low voltage panel is open, e.g. for maintenance purposes.
  • the controller 50 may be configured to ignore other inputs while the panel door is open, or, for example, to send an additional SCADA or SMS notification stating that the access door to the low voltage panel is open.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)

Abstract

L'invention concerne un système pour empêcher les incendies dans un tableau électrique basse tension, comprenant une source de tension (70); un dispositif de commande (50) destiné à déclencher des procédures d'alarme incendie; et au moins un câble de détection de chaleur linéaire (10); le câble de détection de chaleur linéaire (10) étant agencé de manière à couvrir toutes les parties du tableau électrique basse tension susceptibles de créer des sources de chaleur; et le dispositif de commande (50) déclenchant des procédures d'alarme incendie si le câble de détection de chaleur linéaire (10) est déclenché. Ledit système est capable de détecter une accumulation de chaleur dans le tableau électrique basse tension et peut ainsi déclencher une alarme avant qu'un incendie ne se déclare. Les réparations peuvent alors être effectuées à temps, ce qui permet d'éviter l'incendie et de sauver des actifs, voire des vies. Le système est également facile à installer et à faire fonctionner, et engendre de très faibles frais de maintenance.
PCT/IB2017/051467 2016-03-16 2017-03-14 Alarme incendie intelligente pour tableaux électriques basse tension Ceased WO2017158508A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ATA9004/2017A AT520898B1 (de) 2016-03-16 2017-03-14 Intelligente Brandmeldung für Niederspannungsverteiler
GB1708993.9A GB2550498B (en) 2016-03-16 2017-03-14 Smart fire warning for low voltage electrical panels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AE296/2016 2016-03-16
AE2962016 2016-03-16

Publications (1)

Publication Number Publication Date
WO2017158508A1 true WO2017158508A1 (fr) 2017-09-21

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ID=59850171

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/051467 Ceased WO2017158508A1 (fr) 2016-03-16 2017-03-14 Alarme incendie intelligente pour tableaux électriques basse tension

Country Status (3)

Country Link
AT (1) AT520898B1 (fr)
GB (1) GB2550498B (fr)
WO (1) WO2017158508A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115430079A (zh) * 2022-08-15 2022-12-06 北京圣福伦电气技术有限公司 一种小空间灭火方法、装置、系统及存储介质
CN116386163A (zh) * 2023-06-02 2023-07-04 北京利达华信电子股份有限公司 用于巡检管理的方法及系统、电子设备、存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185944A (en) * 1939-05-26 1940-01-02 Holmes Willis Gerald Fire-detecting cable
CN102636734A (zh) * 2012-05-08 2012-08-15 广西达科建筑智能工程有限公司 一种低压电气火灾预防检测装置
CN202485830U (zh) * 2012-01-30 2012-10-10 上海市电力公司 用于配变电系统的温度监测报警装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008046249A1 (fr) * 2006-10-19 2008-04-24 Weishe Zhang Detecteur de temperature lineaire non renouvelable dote d'une alarme de court-circuit
NO330883B1 (no) * 2008-11-11 2011-08-08 Thomas G Gassmann Anordning for sikring mot brann

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185944A (en) * 1939-05-26 1940-01-02 Holmes Willis Gerald Fire-detecting cable
CN202485830U (zh) * 2012-01-30 2012-10-10 上海市电力公司 用于配变电系统的温度监测报警装置
CN102636734A (zh) * 2012-05-08 2012-08-15 广西达科建筑智能工程有限公司 一种低压电气火灾预防检测装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115430079A (zh) * 2022-08-15 2022-12-06 北京圣福伦电气技术有限公司 一种小空间灭火方法、装置、系统及存储介质
CN116386163A (zh) * 2023-06-02 2023-07-04 北京利达华信电子股份有限公司 用于巡检管理的方法及系统、电子设备、存储介质
CN116386163B (zh) * 2023-06-02 2024-03-12 北京利达华信电子股份有限公司 用于巡检管理的方法及系统、电子设备、存储介质

Also Published As

Publication number Publication date
AT520898B1 (de) 2021-04-15
AT520898A1 (de) 2019-08-15
GB201708993D0 (en) 2017-07-19
GB2550498B (en) 2021-12-01
GB2550498A (en) 2017-11-22

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