Related Manuals for Halma Ampac Orbis IS ORB-OP-52027-APO
Summary of Contents for Halma Ampac Orbis IS ORB-OP-52027-APO
- Page 1 Fire detection and evacuation solutions that save lives. Orbis IS Product Guide MAN3041-1...
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Page 2: Table Of Contents
MAN3041-1 Contents Introduction to Intrinsic Safety ......................3 Range of Products ..........................5 Features of Orbis IS ..........................5 Choosing a Detector: Q & A ......................... 6 Orbis IS Optical Smoke Detector......................9 Where to use optical smoke detectors..................9 How does the Orbis IS optical detector work ................ -
Page 3: Introduction To Intrinsic Safety
MAN3041-1 1 Introduction to Intrinsic Safety There are many places where an explosive mixture of air and gas or vapour is—or may be—present continuously, intermittently or as a result of an accident. These are defined as hazardous areas by BS EN 60079, the code of practice for installation and maintenance of electrical apparatus in potentially explosive atmospheres. - Page 4 MAN3041-1 Lloyds Register (LR) LR Type Approval System Marine & Coastguard Agency (MCA) Merchant Shipping (Marine Equipment) Regulations 1999 Detectors have been declared as being compliant with the essential requirements of the EMC Directive 98/336/EEC, the Construction Products Directive 89/106/EEC and the ATEX Directive 94/9/EC. Intrinsic safety certificates for ATEX is Baseefa 06 ATEX 0007X and for IECEx IECEx BAS 06.0002X.
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Page 5: Range Of Products
MAN3041-1 2 Range of Products Orbis IS comprises an optical smoke detector, a multisensor smoke detector, heat detector classes A1R, A1S, A2S, BR, BS, CR and CS and a standard electronics-free base 3 Features of Orbis IS Orbis IS incorporates entirely new designs, both mechanical and electronic. The aim has been to make installation quicker, enhance the reliability of detection and reduce the incidence of false alarms. -
Page 6: Choosing A Detector: Q & A
MAN3041-1 4 Choosing a Detector: Q & A What types of detector are available in the Orbis IS range? An optical detector, a multisensor smoke detector and seven classes of heat detector. How can I tell the Orbis IS range from standard Orbis detectors? Orbis IS detectors have a printed legend around the lid which identifies them and provides information as to their classification. - Page 7 MAN3041-1 mills, textile mills or chemical stores. The type of substance encountered here would cause frequent false alarms if smoke detectors were fitted, so a heat detector is used instead. Figure 1 - Orbis Optical Detector Response to Test Fires Figure 2 - Comparisons of Response between Orbis Optical &...
- Page 8 MAN3041-1 So what is the best way to choose a heat detector? To make things easier we have produced a flow chart to help you decide. Figure 3 – Choosing a Heat Detector...
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Page 9: Orbis Is Optical Smoke Detector
MAN3041-1 5 Orbis IS Optical Smoke Detector 5.1 Where to use optical smoke detectors Optical smoke detectors have always been recognised as good detectors for general use. They are regarded as particularly suitable for smouldering fires and escape routes. The performance of Orbis IS optical detectors is good in black as well as in white smoke. -
Page 10: Enviornmental Performance
MAN3041-1 5.3 Enviornmental Performance: The operating temperature for intrinsically safe detectors is restricted by the gas temperature class. See technical data for full details. 5.4 Classification II 1G Ex ia IIC –40°C<Ta<+40°C(T5) –40°C<Ta<+60°C(T4) BASEEFA Certificate Number ATEX - Baseefa 06 ATEX 0007X IECEx - IECEx BAS 06.0002X 5.5 Technical Data:... -
Page 11: Orbis Is Multisensor Smoke Detector
MAN3041-1 6 Orbis IS Multisensor Smoke Detector The multisensor smoke detector is a thermally enhanced smoke detector and as such will not give an alarm from heat alone. It is a development of the Orbis IS optical detector described in the previous chapter and goes further in its capabilities of fire detection. -
Page 12: Technical Data
MAN3041-1 6.4 Technical Data: Specifications are typical and given at 23°C and 50% relative humidity unless specified otherwise. Detector operating Photo electric detection of light scattered by smoke particles over a wide range principle: of angles. The optical management comprises an infra-red emitter with a prism and photo-diode at 90°... -
Page 13: Orbis Is Heat Detector
MAN3041-1 7 Orbis IS Heat Detector The Orbis IS range incorporates seven heat detector classes to suit a wide variety of operating conditions in which smoke detectors are unsuitable. The European standard EN54-5:2000 classifies heat detectors according to the highest ambient temperature in which they can safely be used without risk of false alarm. -
Page 14: Environmental Performance
MAN3041-1 the case of rate-of-rise detectors the microprocessor uses algorithms to determine how fast the temperature is increasing. Static heat detectors respond only when a fixed temperature has been reached. Rate-of-rise detectors have a fixed upper limit but they also measure the rate of increase in temperature. A fire might thus be detected at an earlier stage than with a static detector so that a rate-of-rise detector is to be preferred to a static heat detector unless sharp increases of heat are part of the normal environment in the area protected by the heat detector. -
Page 15: Orbis Is Base
MAN3041-1 8 Orbis IS Base 8.1 Installing Orbis IS: Orbis IS has been designed to make installation fast and simple. Figure 4 shows the TimeSaver Base as it is seen from the installer’s point of view. The E-Z fit fixing holes are shaped to allow a simple three-step mounting procedure: •... - Page 16 MAN3041-1 Figure 4 – TimeSaver IS Base Figure 5 – Orbis IS TimeSaver Base Wiring Diagram Note: the earth in the base is provided for convenience where continuity of a cable sheath or similar is provided. It is not necessary for the correct operation of the detector nor is it provided as a termination point for a safety earth.
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Page 17: Fitting Orbis Detector Heads
MAN3041-1 Figure 6 – Orbis IS TimeSaver Base with Common Base LED Indicator 8.2 Fitting Orbis detector heads: When the bases have been installed and the system wiring tested, the detector circuits can be populated. Two methods are suggested: 1. Apply power and fit the detectors one by one, starting at the base nearest the panel and working towards the end of the circuit. -
Page 18: Orbis Is Adaptor
MAN3041-1 9 Orbis IS Adaptor An adaptor is available which enables Orbis detector heads to be fitted to existing Series 60 IS bases in order to upgrade systems with minimal disruption. The existing system should conform to ATEX Certificate No. Ex97D2054 SYST. The IS Adaptor is distinguished by the markings “part of intrinsically safe fire detector Baseefa06ATEX0007X”. -
Page 19: Approved Safety Barriers
MAN3041-1 Galvanically isolated barriers are available as single or dual channel versions and are recommended for any application in which direct earth connections are not acceptable. Table 3 shows details of available barriers. The galvanically isolated barrier is a two-wire device which does not need an external power supply. 10.2 Approved safety barriers The system certification includes a generic specification for barriers. -
Page 20: Safety Earth
MAN3041-1 10.3 Safety earth Shunt zener diode safety barriers must be connected to a high integrity earth by at least one and preferably two copper cables, each of cross sectional area of 4mm or greater. The connection must be such that the impedance from the connection point to the main power system earth is less than one ohm. -
Page 21: Wiring And Cable Types
MAN3041-1 11 Wiring and cable types It is not permitted to connect more than one circuit in the hazardous area to any one safety barrier and that circuit may not be connected to any other electrical circuit. Both separate and twin cables may be used. - Page 22 MAN3041-1 Intrinsically safe circuits When using these enclosures with intrinsically safe systems, it is important that segregation be provided between the IS and non-IS circuits. A distance of at least 50mm must be preserved between live conducting parts of IS and other circuits. If the enclosure is used as part of an IS circuit, then it must always be installed inside the safe area.
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Page 23: Maximum Loading Of Is Circuit
MAN3041-1 12 Maximum loading of IS circuit Because of the finite resistance of the safety barrier, there will be a limit to the current drain which can be tolerated before the voltages on the circuit fall outside the specified limits for Orbis I.S. devices. The system certification allows up to 20 Orbis IS detectors to be connected to a single barrier circuit with an end-of-line resistor of not less than 1.8kΩ. -
Page 24: Servicing
MAN3041-1 16 Servicing Servicing of IS fire detectors may be carried out only by a BASEEFA authorised body. In practical terms this means that Orbis IS fire detectors may be serviced only by the manufacturer. Servicing of the fire detection system should be carried out as recommended by the code of practice BS 5839: Part 1 or other local regulations in force. - Page 25 MAN3041-1 AMPAC TECHNOLOGIES UNCONTROLLED DOCUMENT NOTE: Due to AMPAC’s commitment to continuous improvement specifications may change without notice.