Explosion-proof equipment plant
Explosion-proof sound signaling devices PGZ-SIRENA2 are special-purpose signaling devices intended for application in hazardous areas in security and fire alarm systems and other signaling systems. Explosion-proof sound signaling devices PGZ-SIRENA2 are intended for continuous round-the-clock operation in a stand-by mode (possibility to send sound alarm signals) in hazardous areas of industrial and construction facilities, where flammable gases and dust are present. Maximum level of sound pressure is 106 dB, 102 dB (for mining version). The signaling device is supplied with different cable glands.
Application of explosion-proof sound signaling devices PGZ-SIRENA2 with a high level of output signal in large and/or noisy areas guarantees effective signalization with a powerful and precise level of signal. Application of signaling devices with high level of sound pressure is economically reasonable since the number of signaling devices is reducing, hence number of cables and terms of installation.
Full production cycle from foundry patterns to finished products is carried out by explosion-proof equipment plant “ZAVOD GORELTEX” Co. Ltd. in the territory of the Russian Federation.
Scope of application – outdoor and indoor hazardous areas and pits non-hazardous with gas or dust, as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), regulating application of electrical equipment in hazardous and non-hazardous areas at dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor and national technical supervision bodies of the CIS countries.
Marking:
1Ex db e mb IIC T6...Т5 Gb 11Ex db [ib] IIC T6 Gb 1Ex tb IIIC T85°С...T100°С Db 1Ex tb IIIC [ib] T85°С Db
TU 3400-005-72453807-07 TU 27.90.20-038-72453807-2017 TU 4371-014-72453807-2013
12 V)24 V)
| PGZ-SIRENA2 | - | Х | - | Х | / | Х | – TU 3400-005-72453807-07 |
| Type of device | |||||||
Supply voltage:  12V - 12DC; 24V - 24DC; ~230 V - 220AC |
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| Cable gland dimension type (max. 3 pcs.) | |||||||
| Options, accessories and versions |
Example: PGZ-SIRENA2-220AC-KNV1N-TU 3400-005-72453807-07
According to GOST R IEC 60073-2000, sound signals may be applied in cases when:
– it is required to draw an operator‘s attention;
– coded information will be short, simple and transient;
– the information requires immediate time-dependent answer;
– application of visual signal is limited;
– the situation is critical and it requires additional or redundant information.
The sound signal may consist of pure or complex tones (not more than 5 signals). The sound signal must be audible and easily recognized by operators and people in the set area of signal reception and at set background noise conditions. Signals must be different from the emergency signal, as per ISO 8201 part 7.
Sound signals of different types must be clearly distinguishable from each other. Limited audibility of signals must be also taken into account in cases, when employees wear protective devices or earphones, as well as people with hearing impairment.
General rules of identification of sound signals when coding the information:
1. Continuous, sharply intensifying sound means danger (danger to the safety of people or equipment), critical (process status), malfunction (equipment status).
2. Intermittent sound with constant interval means attention (safety of people or equipment), transient (process status), transient (equipment status).
3. Continuous sound with permanent level means safety (safety of people or equipment), normal (process status), normal (equipment status).
4. Interchanging sounds have special meaning, as per technological documentation.
5. Other sounds do not have special meaning and cannot be easily identified by operators, not desirable.
To prevent sound overpressure of operators, it is required to use minimum amount of sounds of different kind in this application.
Intermittent sound signal may be used in some particular cases (for example, in case of change of dangerous or transient state to a safe state).
Sound signals should not be applied in case of safe state (silence).
Selection of emergency sound signaling device
