Where can I find a description of the available annoucements?
The content of annoucements is described in the Operation and Maintenance Manual (O&M) and the product leaflet. Additionally, the content of voice messages for certified alarms is also included in the Certificate of Approval issued for the product by CNBOP-PIB.
Where can I find a description of the available sound patterns (sirens)?
Sound patterns (sirens) are described in the Operation and Maintenance Documentation (O&M) and the product leaflet. Additionally, sound patterns are also included in the Certificate of Approval issued for the product by CNBOP-PIB.
What effect does the cross-section of the wires have on voltage drops?
The larger the cross-section of the wires, the lower its resistance and, consequently, the lower the voltage drops. For example, the HDGs 1x2x1.5 mm2 cable has a core resistance of R = 12.1 Ω/km, while the HTKSH 1x2x2.5 mm2 cable has a core resistance of 7.41 Ω/km. In order to calculate the voltage drop, the length of the line should be taken into account and a safety factor related to the length of the wire that may be caught in fire (increase in its resistance) should be assumed.
What effect does the attenuation of partitions have on the alarm signal level?
Obstacles such as doors affect the level of the alarm effect. For other doors, an attenuation of approximately 20 dB is acceptable, and for fire doors even approximately 30 dB. If it is not practical to use it, it is necessary to ensure the sound level in places where the siren is located behind more than one door.
What is the effect of temperature on the resistance of wires?
The resistance of the wires changes as a function of temperature. According to the ISO curve, the temperature of the PH30 cable operating in fire conditions will be 822°C after 30 minutes and its resistance will increase 4.5x! The temperature of the PH90 cable after 90 minutes will be approximately 955°C and its resistance will increase by almost 5.3x! This should be taken into account when designing the installation and appropriate safety factors should be adopted. The resistance of the cable affects voltage drops and, consequently, whether the device will operate in hazardous conditions or not. Voltage drops can be compensated by increasing the cross-section of the conductors.
How to read and what does the IP protection degree mean?
Degrees of protection provided by enclosures (IP code) is the full name of the PN-EN 60529 standard. It contains a classification of degrees of protection provided by enclosures of electrical devices with a rated voltage up to 72.5 kV.
The code consists of:
- first characteristic digit (against the ingress of foreign solids)
- second characteristic digit (against water ingress)
- additional letter (before access to hazardous parts)
- supplementary letter (supplementary information)
For example, according to EN 54-3, EN 54-23 standards, external fire alarms (type B) must provide IP33C protection. This means that the housing provides protection against:
- access to hazardous parts with a tool (2.5 mm probe)
- foreign bodies with a diameter of 2.5 mm and larger
- water spraying (at any angle up to 60° from the vertical)
How to calculate the required battery capacity for the power supply?
The required capacity K [Ah] of the battery(s) can be calculated from the formula:
K=1,25*(I1*t1+I2*t2)
Where:
K – required capacity, in ampere-hours (Ah)
t1 – support time, in hours (h)
t2 – alarm time, in hours (h)
I1 – total current consumed by the fire alarm system in the event of failure of the energy source, in amperes (A)
I2 – total current consumed by the fire alarm system when alarming, in amperes (A)
What does the IP21C and IP33C code mean?
For type A signaling devices, the manufacturer should ensure a minimum degree of 21C (in accordance with EN 60529: 1991. Degrees of protection provided by enclosures (IP code) - this standard specifies "... a system of classification of degrees of protection, marked with a code, provided by enclosures of electrical devices with rated voltage not more than 72.5 kV ... "), which is synonymous with the fact that the device itself is protected against access by foreign bodies with a diameter greater than or equal to 12.5 mm and against the harmful effects of dripping water penetrating the housing of the device. For the user himself, this is a protection against accessing hazardous parts with fingers.
On the other hand, B type devices should have a degree of protection of at least 33C. According to the standard referred to above, this means protection against the access of foreign objects with a diameter greater than or equal to 2.5 mm and against the harmful effects of sprayed water penetrating the housing of the device. The user is protected against access to hazardous parts, even when using a tool. However, it has to be said that the product should be provided with appropriate measures to restrict access to its interior to remove a part or the entire device, as well as change the mode of operation, e.g. through special tools, codes, hidden screws, seals.
What does the category (type A, type B) means?
The EN 54-23: 2010 harmonized standard introduces the division into type A (for indoor applications) and type B (for outdoor applications) VADs. This is important from the point of view of the requirements that the device must meet. In short, devices classified as type B must undergo more stringent tests, e.g. they must have a higher degree of IP protection and undergo additional tests that are not required for type A devices. All this means that they can be used both outside and inside buildings where, for example, prolonged high humidity may occur and / or be exposed to high temperatures.
Do fire alarm devices have protection against reversal of supply voltage polarity?
Tak, sygnalizatory pożarowe posiadają zabezpieczenie przed zmianą polaryzacji napięcia zasilającego.
Is it possible to turn off the sound in sounders?
Yes, it is possible. In order to switch off sound and remain an optical signal on, you should use the WSD-1 switch.
Do fire alarm devices have a built-in power supply or do they need to be powered from the control panel?
Sygnalizatory pożarowe nie posiadają wbudowanego zasilacza, konieczne jest zapewnienie zewnętrznego źródła zasilania. Do zacisków sygnalizatora powinno być doprowadzone napięcie zgodnie z dokumentacją producenta.
Can a fire alarm signal inform about other events?
The fire alarm signal may only be used when the desired reaction of the recipient is consistent with a fire hazard situation. In other cases, the fire alarm signal should not be used unless it is broadcast in conjunction with other information.
What are the requirements for the alarm signal pattern?
The alarm signal for the purpose of informing about fire danger should be the same in all parts of the building.
On a campus or in a place with multiple buildings, the alarm sound pattern should be the same for all buildings.
Signals from alarm devices must be different from operational signals
What sound level should the sounder provide?
The sound level should be sufficient for the acoustic alarm signal to be clearly audible above the general noise level (interfering sound level). Additionally, the signal level should not exceed 118 dB(A) in any place where people may be present.
The minimum sound level of the alarm signal should be at least 65 dB(A) or 10 dB(A) above the level of disturbing sounds lasting longer than 30 s (whichever is greater).
If the alarm signal should wake up sleeping people (rest areas), the minimum sound level at the ear level of sleeping people should be at least 75 dB(A).
Minimum levels should be achieved wherever an alarm signal should be audible.
What cable should be used to program voice sounders?
To program the voice sounders, use a USB A/micro USB cable. After connecting the cable to a PC or laptop, the siren will be detected as mass storage.
Notice!
The cable used should have a data transmission function (some cables can only be used for charging). You will find a suitable cable in our offer.
What is the operating sequence of the voice sounders used in the FAS?
Voice sounders must meet the requirements of the EN 54-3 standard, which includes the operating sequence:
Alarm signal from 2 to 10 s
Silence from 0,25 to 2s
Voice announcement <30 sec <30 s
Silence from 0,25 to 2s
Is speech intelligibility measurement required for voice sounders?
Voice sounders meets the requirements of EN 54-3:2001+A1:2002+A2:2006 Fire alarm systems - Part 3: Fire alarm devices - Sounders with change 2, which specifies the requirements for sounders with voice announcements. The scope of tests provided for sounder devices in accordance with the abovementioned standard does not provide for measuring speech intelligibility. It is worth remembering that voice alarms are not a substitute for voice alarm systems, for which such measurement is required.
Accordingly, the requirements for voice alarms are those that are contained in EN 54-3:2001+A1:2002+A2:2006. When placing sounders, you can additionally use the Technical Specification CEN/TS 54-14:2004 and the American standard NFPA 72: National Fire Alarm and Signaling Code. However, the main requirement remains to provide the required volume of generated sound.
What is the maximum duration of messages?
The message can be up to 30 seconds long - the total size of the message files cannot exceed 2 MB.
How many wires should be connected to trigger 1 message?
To trigger 1 message it is only needed to connect 2 wires. If there is a need to synchronize several signaling devices, connect the system according to the scheme available in the product description.
Can you assign a different siren for individual messages?
There is no option to assign a different siren for individual messages. The choice of an alarm signal is made for all messages.
When is synchronization required to be used between voice sounders?
Synchronization is required when sounding corridors, rooms in which two or more alarm devices may work at the same time, for example, sounding of hotel corridors. Alarm devices should be synchronized within one level whereas levels do not need to be synchronized. In case of lack of synchronization of alarm devices, an emitted announcement may be incomprehensible as a result of different starting times of emission of announcements by alarm devices.
Are there any standard fire alarm announcements?
Fire alarm announcements should be adapted to facility specificity, the contents of announcements depend on the way the FAS system is installed in a building. The contents of an announcement should be arranged by the designer of the FAS installation or a person in charge of fire protection in a given building.
How many voice alarms can be connected into one synchronized network?
Up to 10 voice alarm devices can be connected into one network using the synchronization function.It is not recommended to connect the signaling devices into large, extensive networks because damage to the cable / signaling device during a fire can damage all fire signaling (in the best case only synchronization is lost).
Can voice sounders be synchronized with each other?
Yes, the SG-Pgw2, SG-Pgw3, SGO-Pgw, SGO-Pgz3 voice sounders can be synchronized with each other. To synchronize, connect the system in accordance with the guidelines provided in the descriptions of individual products. Additionally, please remember that the same message must be uploaded and triggered in each device that is to operate in the network.
Can alarm devices operating in a network be powered from different sources?
Yes, alarm devices operating within one network (synchronized with each other) can be powered from different sources. Please remember that in such a case, the delays in switching on individual groups of signals are important. If they are significant, the signals will be synchronized with each other, but only from the next sequence started.
