EDS - SPARK DETECTORS - GENERAL NOTES

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2 EDS - SPARK DETECTORS - GENERAL NOTES The spark detectors are electronic devices suitable for the detection of sparks in the pipes or transport ducts of conbustible material of different nature (sawdust, flour, metal powders, etc.), to a collection Silos. During the transport phase may happen that, mixed with the material to be transported, is transported also some spark produced upstream during the processing phases. If this spark is not detected and neutralized very quickly because, once inside the Silos, may cause fire and even the explosion of the same. Thus the detection of the spark performed in a precise and timely manner, can be exploited to avoid major damage and dangers to people and things, and consequently, increase the level of safety. The composition of a spark detection system comprises the following elements: 1 - spark detection system 1 - extinguishing system Spark The spark detection system includes: 1 - spark detector - model EV-395 (IP67) or SCL-01 (Ex-d ATEX) 1 - control panel - model EV-521 (for 2 spark detectors) or SCU-04 (for 4 spark detectors) The shutdown system includes: 1 - solenoid - VL pressure or flow - PRS spray nozzle - SP etc. depending on the diameter of the pipe 1 - shutter or flow deviation prior to placing in Silos collection - model EDS-SRG-ET In the following pages lists the various schemes relating to spark detection systems. If the diameter of the pipes within which the fluid flows to explore has a diameter less than 50 cm, is sufficient 1 spark detector for exploring the total section of the pipe. If the diameter of the pipe has a diameter greater than 50 cm, to avoid dead zones not explored by the detector, must be used two detectors installed diametrically opposed. If the system is to be achieved the maximum safety, in addition to a first section detection and extinguishing, can be installed downstream, a second detection and extinguishing section. In this case the first section has the task of detecting and switch off the spark, while the second has the task of verifying the effective extinction of the spark, and, if this has not happened, proceed to a second and final detection and extinguishing attempt. In addition to these elements are also useful: 1 - shutter or flow deviation prior to placing in Silos collection 1 - temperature detector inside the silos in Ex-d ATEX to give an alarm if the temperature exceeds a predetermined limit within the Silos To reach the maximum of the technical characteristics and safety, the spark detectors EDS must be controlled by special control panels EV-521 or SCL-04 designed specifically for these detectors. Spark detectors are extremely fast, because they have to detect a spark that travels at speeds up to 100 Km / h. The operating time of the system that is the sum of the times of detection, signal processing, excitation of the relay output, activation of the extinguishing system, it must be extremely short and can be realized only with the control panels with particular characteristics such as EV-521 and SCU-04. 2

3 TECHNICAL INFORMATION Spark Detector EV 395 ADVANTAGES signalling quickness and precision remote functioning test available solid metal box easy installation easy maintenance APPLICATIONS wood industry: sawdust shavings textile industry: cotton all other fibres food industry: cereals The EDS EV395 Spark Detector is an electronic device suited to detect sparks in combustible materials transport pipes and channels, headed to a storing silo. During the transporting phase, a spark, produced in the previous manifacturing stages, can be transported mixed with the materials. If this spark is not detected and neutralized very quickly, once it arrives inside the silo, it can cause a fire or an explosion. So the precise and quick detection of the spark, can be used to prevent great damages and dangers to both people and things and consequently to elevate the security level of the installation. The EV395 detector is able to reveal sparks that cross its viewing range even if they have a great velocity (up to 100 km/h). The detector is equipped with an optical head sensible to infrared radiation, that has a viewing range of more than 90 degrees (solid angle) and a suitable electronic circuit that provides the amplification and managing of the signal. When the EV395 detector intercepts a spark it provides the powering of a relay suitable to switch on optical and acoustic alarms. Moreover a fire extinguishing system ( splinker ) can be activated. For the former function it is suggested to use our EV 521 control unit that has a great using flexibility. If the pipes have a large diameter (over 0,5 m.) several EV395 detectors can be used to obtain a better security level. If a water spraying automatic extinguishing system is also present,the spark extinguishing can be verified.if the transporting pipe has not a cylindric shape, for example squared or rectangular, it can be necessary to use two opposed detectors, to avoid dead zones external to the viewing range of the detector, The detector's box is made of fusion light alloy with IP67 protection, and so the internal electronics are protected from dust, shocks and from ambient conditions, that can be also corrosive, permitting to use the detector outdoor for a long time without any problem. The maintenance of this detector is very simple and not frequently required. EV395 is supplied complete with mounting brackets. TECHNICAL DATA power supply: 24 V cc or ac power consumption: 20 ma (no alarm) - 50 ma (alarm) optical viewing solid angle: 90 degrees max detecting distance: about 50 cm sensitivity regulation regulation of relay powering time: 1-10 sec pins to connect a remote test button alarm LED output relay: 6A/24V fusion light alloy metal box protection index: P67 dimentions: 140x135x85 weight: 0,7 Kg 3

4 Installation example with one EV395 transporting pipe water feed pipe electrovalve pressure meter water cone EV395 spark detector nozzle Installation example with two EV395 shutter SILO 4

5 TECHNICAL INFORMATION Explosion Proof Spark Detector SCL-01 ADVANTAGES signalling quickness and precision remote fuctioning test available solid metal box easy installation easy maintenance APPLICATIONS wood industry: sawdust shavings textile industry: cotton all other fibres food industry: cereals The EDS SCL01 Spark Detector is an electronic device suited to detect spark in pipes and channels that transport varoius types of combustible materials headed to a storing silo. The execution is explosion proof EX-d IIC-T6 - ATEX certified. So the detector is suitable to be installed in classified environments where the installations must be explosion proof. During the transporting phase, a spark, produced in the previous manifacturing stages, can be transported mixed with the materials. If this spark is not detected and neutralized very quickly, once it arrives inside the silo, it can cause a fire or an explosion. So the precise and quick detection of the spark, can be used to prevent great damages and dangers to both people and things and consequently to elevate the security level of the environment. The SCL01 detector is able to reveal sparks that cross its viewing range even if they have a great velocity (up to 100 km/h). The detector is equipped with an optical head sensible to infrared radiation, that has a viewing range of more than 90 degrees (solid angle) and with a suitable electronic circuit that provides for amplification and processing of the signal. When the SCL01 detector intercepts a spark it provides the powering of a relay suitable to switch on optical and acoustic alarms. Moreover a fire extinguishing system (splinker head systems) can be activated. For the former function it is suggested to use our EV 521 or SCU04 control unit that has a great using flexibility. If the pipes have a large diameter (over 0,5 m.) several SCL01 detectors can be used to obtain a better security level.if a water spraying automatic extinguishing system is also present,the spark extinguishing can be verified. If the transporting pipe has not a cylindric shape, for example squared or rectangular, it can be necessary to use two opposed detectors, to avoid dead zones external to the viewing range of the detector. The detector's box is made of fusion light alloy with IP65 protection, and so the internal electronics are protected from dust, shocks and from ambient conditions, that can be also corrosive, permitting to use the detector outdoor for a long time without any problem. The detector is supplied with a inox steel fixing stirrup to be easily fixed on the pipes. The maintenance of this detector is very simple and not frequently required. Supplied Materials The standard supply materials include: - 1- SCL SUP-01 - inox steel fixing stirrup TECHNICAL DATA power supply: 12/24 V dc and ac power consumption: 20 ma (no alarm) - 50 ma (alarm) solid viewing angle: 90 gradi max detection distance: about 50 cm sensitivity regulation relay activation time regulation: 1-10 sec terminals to connect a remote working test button alarm led output relay: 6A/24V light alloy metal container cables mounth: 3/4" ISO 7/1 explosion proof execution EX-d IIC T6 - IP66 certifications: CESI 01 and ATEX 092 dimensions: 200x130 mm weight: 2 Kg 5

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7 EV521 Spark Detection Control Unit FEATURES suitable to control two EV395 spark detectors temporized command for 4 output relays for the following functions: command 1 or 2 electrovalves feeding water spraying nozzles for spark extinguishing command acoustic and visual alarms automatic activation of shutters to block the accumulation of materials in a silo verification of electrovalves opening using pressure meters in the hydraulic circuit ADVANTAGES simple and easy installation provided with all the elements necessary for a spark detection system the box transparent plastic door, allows the visualization of the leds and the control elements, and protects the unit from tampering provided with an internal stabilized power supplier In spark detection systems, devices other than the specific detector are normally required. Usually these additional devices allow the detected sparks extinguishing, the acoustic signalling of alarms, the control of extinguishing systems and the eventual block of the silo material feeding system. The operations described above are carried on by the EV521 Control Unit in very short times, with precision, in the right sequence and so definitely in the best way. The EV521 Control Unit has been designed to be used together with our EV395 Spark Detectors. It can control up to two EV395 detectors. This unit automatizes all the operations and so allows to use the EV395 Spark Detectors in a simple and reliable way. Moreover the EV521 Control Unit avoids the necessity to buy a lot of devices coming from different manifacturers and so the problem of coupling this eterogenous devices. The EV521 installation is very simple and can be carried out in a short time. FUNCTIONING The typical installation of a spark detection system in a silo feeding pipe consists at least of: 1 spark detector 1 electrovalve to open/close the water feeding 1 water spraying nozzle (sprinkler head) for spark extinguishing 1 visual/acoustic signalling unit For the maximum safety it is good to double all the elements above described to obtain the following result: the first section performs the detecting and the extinguishing the second allows the final control and if the spark is not extinguished yet, executes the extinguishing and the system block The example of page 2 is about a complete installation with two EV395 and an EV521 Control Unit. The EV521 functioning mode is the following: it is connected with the two EV395 detectors by means of the supplied terminal board, so that it can supply the detectors with power and receive the signals from them. if an alarm signal is sent from the first spark detector the EV521 powers the internal relays R1 and R2. R1 activates the VL1 electrovalve. The VL1 opening causes, by means of the SS1 nozzle (sprinkler head), an extinguishing water spray in the pipe. The spraying time lenght is regulated by an internal timer (time adjustable between 0-30 sec.). the second relay R2 commands the acoustic(warning siren) and visual(warning flasher) if the second spark detector gives out an alarm, the EV 521 powers R3 and R4 relays. R3 activates the VL2 electrovalve that commands the SS2 extuinguishing sprinkler head. The R4 relay will be eventually useful to command the pipe shutter closing. The SS1 and SS2 pressure meters are mounted on both the feeding pipes for the SS1 and SS2 nozzles. The meter s outputs are used to command the onboard memory system with signalling led of the EV521 Control Unit. In this way a confirmation of the sprinkler heads intervention is provided. 7

8 TECNICAL DATA Supply voltage: 220 Vac Power: 5 VA Main switch Timer: 2 adjustable with trimmer between 0-30 sec Led - supply Led - elecctrovalve 1 activation Led - elecctrovalve 2 activation Led - memory of pressure gauge 1 activation Led - memory of pressure gauge 2 activation Removable power supply fuse Memory Reset button Test button - for test of spark detector from distance Output relays: 4 - (2 with programmable function) Enclosure: impact resistant plastic with transparent cover Protection index: IP 54 Dimensions: 270x330x110 mm Weight: 4,20 Kg 8

9 INFORMAZIONI TECNICHE Spark Detector Control Unit SCU-04 FEATURES suitable to control four EV395 or SCL01 spark detectors temporized command for 4 output relays for the following functions: command 1 or 2 electrovalves feeding water spraying nozzles for spark extinguishing command acoustic and visual alarms automatic activation of shutters to block the accumulation of materials in a silo verification of electrovalves opening using pressure meters in the hydraulic circuit ADVANTAGES simple and easy installation provided with all the elements necessary for a spark detection system provided with an internal stabilized power supplier In spark detection systems, devices other than the specific detector are normally required. Usually these additional devices allow the detected sparks extinguishing, the acoustic signalling of alarms, the control of extinguishing systems and the eventual block of the silo material feeding system. The operations described above are carried on by the SCU04 Control Unit in very short times, with precision, in the right sequence and so definitely in the best way. The EVSCU04 Control Unit has been designed to be used together with our EV395 or SCL01 spark detectors. It can control up to four spark detectors. This unit automatizes all the operations and so allows to use the spark detectors in a simple and reliable way. Moreover the SCU04 Control Unit avoids the necessity to buy a lot of devices coming from different manifacturers and so the problem of coupling this eterogenous devices. The SCU04 installation is very simple and can be carried out in a short time. FUNCTIONING The typical installation of a spark detection system in a silo feeding pipe consists at least of: 1 spark detector 1 electrovalve to open/close the water feeding 1 water spraying nozzle (sprinkler head) for spark extinguishing 1 visual/acoustic signalling unit For the maximum safety it is good to double all the elements above described to obtain the following result: the first section performs the detecting and the extinguishing the second allows the final control and if the spark is not extinguished yet, executes the extinguishing and the system block The example of page 2 is about a complete installation with two EV395 or SCL01 and an SCU04 Control Unit. The SCU04 functioning mode is the following: it is connected with the spark detectors by means of the supplied terminal board, so that it can supply the detectors with power and receive the signals from them. if an alarm signal is sent from the first spark detector the SCU04 powers the internal output relay R1 R1 activates the VL1 electrovalve. The VL1 opening causes, by means of the SS1 nozzle (sprinkler head), an extinguishing water spray in the pipe. The spraying time lenght is regulated by an internal timer T1 (time adjustable between 0-30 sec.)of SCU04. R1 activates also the optical (warning flasher) and acoustical (warning siren) devices if the second spark detector gives out an alarm, the SCU04 powers the internal output relay R2 R2 activates the VL2 electrovalve that commands the SS2 extuinguishing sprinkler head. The R2 relay will be eventually useful to command the automatic pipe shutter closing of silos. the PRS1 and PRS2 pressure meters are mounted on both the feeding water pipes for the SS1 and SS2 nozzles. The contacts of the main board of pressure meters are used to command external board memory system with signalling Led. In this way a confirmation of the sprinkler heads intervention is provided If the pipes have a large diameter (over 0,5 m.) two spark detectors installed diametrically opposite, can be used to obtain a better security level. In this case we need 4 spark detectors. To each spark detector, in the SCU04 is associated an output relay (R1 - R2 - R3 - R4) 9

10 TECHNICAL DATA power supply: 220 Vac power consumption: 20 VA power supply fuse fuse for 24Vcc output voltage 4 detection zones for 4 spark detectors EV-395 or SCL-01 ON - OFF Led Led for electrovalve powered Led for memory electrovalve powered timers: 4 adjustable between 0-30 sec. with a trimmer memory reset push button 4 push buttons for spark detectors Test from distance 4 output relays enclosure: metal epoxy painted eprotection index: IP 54 dimensions: 275x325x110 mm heigt: 4,5 Kg Example installation with two spark detector shutter closing SILOS EV -395/SCL-01 spark detector 10

11 TECNICAL INFORMATION Accessories for Spark Detection Systems VL electrovalve - NC normally closed pilot operated - Interception of liquid - Body: brass and stainless steel - Guide hose: stainless steel - Connection: 3/4 - Differential pressure: 12 bar - Max pressure: 20 bar - Flow rate: 5 m3 / h (83litri/minuto) - Electromagnet: 10 VA - Voltage: 24VAC - Service: continuous - Temperature: -10 to + 60 C - Protection: IP65 PRS pressure switch - Pressure range: 2 to 5.5 bar - Maximum pressure: 7 bar - Rated current: 10A - Exchange contact - Execution: IP40 - Operating temperature: -35 to + 80 C - Connection: G 1/4 "female SP - nozzle - material: OT SP14F08 - connection: 1/4 "Female - 8 liters / minute full cone 61 degrees SP12M25 - connection: 1/2 "male l / m full cone - 67 degrees SP34F25 - connection: 3/4 "female-22 l / m full cone - 67 degrees SP34F7 - Attack: 3/4 "female-62 l / m full cone - 92 degrees SP34F32 - Attack: 3/4 "female-32 l / m full cone - 90 degrees SP12F10 - Attack: 1/2 "female-18 l / m full cone - 67 degrees SP12F120 - Attack: 1/2 "female-94 l / m full cone - 90 degrees EDS electromagnet - Power: 24VDC - Attraction force: 50 Kg - Rated current: 46 ma - Test button - For control of fire door SIRLD-1 - sirena + lampeggatore -- Power: 12/24Vcc-ca - Orange - Sound level: 105 db - Complete the basic BSP wall or BSM vertical EDS-SRG-ET - Pneumatic pistons: 2 - Material: galvanized steel - Solenoid voltage: 220Vac, 110Vac, 24V ac, 24Vdc (specify when ordering) - Minimum working pressure: 6 bar - Closing time: 2 sec (diameter ) - 3 sec ( ) - 4 sec ( ) - Position (horizontal / vertical): any 11

12 The technical information in this document have been carefully checked and can be considered reliable. In any case the EDS Company is not responsable for any eventual inaccuracy and reserves the right to make changes to any part of this document and/or to the products, in order to improve their quality, reliability or design. EDS - ELECTRONIC DETECTION SYSTEMS Via Ca' Nova Zampieri S.G. Lupatoto - VERONA - ITALY Tel: Fax: Web: eds@eds.eu 12