1、CEPT T/TR*02-09*E b = 23261134 O030577 5 = 1 TTR02-09 Page E 1 Recommendation T/TR 02-09 (Odense 1986) CLASSIFICATION OF ENVIR0NIWNI“T CONDITIONS FOR STATIONARY TELECOMMUMCATIONS INSTALLATIONS AT WEATHER-PROTECTED LOCATIONS ENVIRONMENTAL CLASSES 3.1-3.5 Recommendation proposed by Working Group T/WG
2、12 “Transfnission“ (TR) Text of the Recommendation adopted by “Telecommunica fions“ Commission : Abstract This document specifies classified environmental parameters and their severities for stationary telecommunication equipment installations at weather-protected locations. -_ Edition of September
3、I, 1986 CEPT T/TR*OZ-O*E 6 m 2326434 0030578 7 1. 0 2. 3. 3.1. 3.2. 0 3.3. 4. T/TR 02-09 E Page 3 PURPOSE The purpose of this document is to state the classes of the environmental conditions and their severities to which telecommunication and related equipment may be exposed at specified locations i
4、n Europe. SCOPE This document applies to telecommunication and related equipment installed for stationary use at weather- protected locations during - normal operation; - exchange or installation construction; - repair and maintenance. RELATED DOCUMENTS CEPT Recommendation T/TR 02-03 “Environmental
5、conditions for equipment to be installed in telecommunication centres. CEPT Recommendation T/TR 02-06 - “Environmental conditions for telecommunications equipment at weather-protected locations (excluding telecommunication centres with temperature and humidity controls) and in the open air.” I E C P
6、ublication 721-3-3 “Stationary use, including handling during use and service at weather-protected locations.” DEFINITIONS Stationary use The product is mounted firmly on the structure or on mounting devices or it is permanently placed at a certain site. It is not intended for portable use, but shor
7、t periods of handling during erection work, down time, maintenance and repair at the location are included. Weather-protected location A location at which the product is protected from weather. - Totally weather-prorecfed location (enclosed location). - Partly wearher-protected location (sheltered l
8、ocafion). Climate-controlling system A system that controls or influences climate, acting at least on one climatic parameter in one direction. Heating system A system that controls or influences climate, increasing tie air temperature only, and this can decrease the relative humidity. Cooling system
9、 A system that controls or influences climate, decreasing the air temperature only, and this can decrease the absolute humidity. Forced ventilation system A system that controls or influences climate, conducting outdoor air into the room or expelling air out of the room. Air-conditioning system A sy
10、stem that fully and automatically controls the climatic parameters, air temperature and humidity and humidity by heating, cooling, humidifying and dehumidifying. Relative humidity The ratio of the partial pressure of the water vapour in moist air at a given temperature t, to the partial pressure of
11、the water vapour in saturated air at the same temperature t. Absolute humidity The mass of water vapour in grammes which is associated with one cubic meter of dry air in an air-water vapour mixture. Direct weather influences are totally excluded. Direct weather influences are not completely excluded
12、. Edition of September I, 1986 P CEPT T/TR*02-09*E 6 2326414 0010579 9 t/TR 02-09 E Page 4 5. CLASSES OF ENVIRONMENTAL CONDITIONS 5.1. . Class 3.1 : Temperature controlled This class is a combination of the parameters shown in CEPT Recommendation T/TR 02-03 (I EC Pub- lication 72 1-3-3 classes 3K3/3
13、BI /3C2/3S2/3M 1). This class applies to a permanently temperature controlled enclosed location. Humidity is usually not controlled. The climatogram is shown as Figure 1 (T/TR 02-09). Heating, cooling, forced ventilation and, where necessary, humidification are used to maintain the required conditio
14、ns-specially where there is a significant difference between the room environment and the external ambient. The climate-controlling systems could be periodically switched on or off but extremely high or low temperatures are prevented. This class applies to locations: - where installed equipment may
15、be exposed to solar radiation and to heat radiation. They may also be exposed to movements of the surrounding air due to draughts in buildings, e.g. through open windows. They are not subjected to condensed water, precipitation, water from sources other than rain or icing; - without particular risks
16、 of biological attacks. This includes protective measures, e.g. special product design, or installations at locations of such construction that mould growth, attacks by animals, etc. are not probable; - with normal levels of contaminants experienced in urban areas with industrial activities scattere
17、d over the whole area, and/or with heavy trafic; - without special precautions to minimize the presence of sand or dust, but not situated in proximity to sources of sand or dust; - which are protected from significant vibration and shocks. The conditions of this class may be found in - normal living
18、 or working areas, e.g. living rooms, for general use (theatres, restaurants); - offices; - shops; - workshops for electronic assemblies and other electrotechnical products; - telecommunication centres; - storage rooms for valuable and sensitive products. - Q c Edition of September I, 1986 CEPT T/TR
19、*02-09*E b m 2326414 0010580 5 m I 80 70 60 50 40 30 20 10 O - 10 - 20 - 30 - 40 - tio - 60 - 70 Temperahire-Humidity-Chart T/TR 02-09 E Page 5 200 150 1 O0 80 60 40 30 25 20 15 10 7 5 3 2 1.5 1 .5 .2 .1 .O5 .o2 .o1 .O05 O 10 20 30 40 50 60 70 80 90 100 Relative Humidity (%) - Normal Operating Condi
20、tions. - - - Exceptional Operating Conditions. ;. . Field 90% Frequency of Occurrence. Figure 1 (T/TR 02-09). Class 3.1 Telecommunications Environment for a Stationary Installation (Weather-Protected: Temperature Controlled). This Figure shows the Field of 90% Frequency Occurrence and the Exceptiona
21、l Operating Conditions Boundary for Class 3.1. Exceptional Conditions may occur following the Failure of the Climate-Controlling System. Edition of September 1, 1986 CEPT T/TR*Q2-07*E Bb 232b4Li.I OQLQ58L 7 T/TR 02-09 E Page 6 5.2. Class 3.2: Partly temperature controlled This class is a combination
22、 of the parameters shown in CEPT Recommendation T/TR 02-06 (see also I E C Publication 721-3-3 classes 3K5/3B2/3C2/3S2/3M3). This class applies to an enclosed location having neither temperature nor humidity control. The climato- gram is shown as Figure 2 (T/TR 02-09). Heating may be used to raise l
23、ow temperatures especially where there is a significant difference between the conditions of this class and the open-air climate. Building construction is designed to avoid extremely high temperatures. This class applies to locations : - where installed equipment may be exposed to solar radiation an
24、d heat radiation. They may also be exposed to movements of the surrounding air due to draughts in buildings, e.g. through open windows. They may be subjected to condensed water, to water from sources other than rain and to icing. They are not subjected to precipitation; - where mould growth or attac
25、ks by animals, except termites, may occur; - with normal levels of contaminants experienced in urban areas with industrial activities scattered over the whole area and/or with heavy trafic; - in close proximity to sources of sand or dust; - which are protected from significant vibration but may rece
26、ive some transmitted shocks, e.g. from The conditions of this class may be found in - entrances and staircases of buildings; - garages; - cellars; - certain workshops; - buildings in factories and industrial process plants; - unattended equipment stations; - certain telecommunication buildings ; - o
27、rdinary storage rooms for frost resistant products, farm buildings, etc. Note: Underground spaces, manholes, etc. Class 3.2 can be used in these locations although the distribution and duration of severities are different. The relative humidity exceeds 95% RH for more than 1% of the time and may rea
28、ch 100% RH. local blasting or pile driving activities, slamming doors. Edition of September 1, 1986 CEPT T/TR*02-09*E b S 232b419 0010582 9 T/TR 02-09 E Page 7 80 70 60 50 40 30 20 10 t! go - 10 - 20 130 U 3 v c 5 E b - 40 - 50 - 60 - 70: Temperahre-Humidity-Char t 200 150 1 O0 80 60 40 30 20 15 10
29、7 5 3 2 1 5 .2 .1 .O5 .o2 .o 1 .O05 O 10 20 30 40 50 60 70 80 90 100 Relative Humidity (%) “E - 29 P x B o 8 Figure 2 (T/TR 02-09). Class 3.2 Telecommunications Environment for a Stationary Installation (Weather-Protected: Partly Temperature Controlled). Note. Unheated telecommunication centres may
30、experience a lower extreme temperature down to - 15C. Edition of September I, 1986 7 CEPT T/TR*02-09* 8b S 232b4II4 OOII0583 O T/TR 02-09 E Page 8 5.3. Class 3.3: Not temperature controlled This class is a combination of the parameters shown in CEPT Recommendation T/TR 02-06 (see also I E C Publicat
31、ion 721-3-3 classes 3K6/3B2/3C2/3S3/3M3). This class applies to a weather-protected location having neither temperature nor humidity control. The location may have openings directly to the open air, .e. may be only partially weather-protected. The climatogram is shown as Figure 3 (T/TR 02-09). The c
32、limatic conditions of this class my be affected to a varying extent by the conditions of the open-air climate and the construction of the building. This class applies to locations: - where installed equipment may be exposed to solar radiation and temporarily to heat radiation. They may also be expos
33、ed to movements of the surrounding air due to draughts, e.g. through doors, windows or other openings. They may be subjected to condensed water, to water from sources other than rain and to icing. They may temporarily be subjected to limited wind-driven precipitation, including snow; - where mould g
34、rowth, or attacks by animals, except termites, may occur; - with normal levels of contaminants experienced in urban areas with industrial activities scattered over the whole area and/or with heavy trafic; - in close proximity to sources of sand or dust; - which are protected from significant vibrati
35、ons but may receive some transmitted shocks, e.g. from local The conditions of this class may be found in - some entrances to buildings; - some garages; - some shacks; - unattended equipment stations; - unattended buildings for communication purposes, etc. blasting or pile driving activities, slammi
36、ng doors. Edition of September i, 1986 CEQT T/TR*02-09*E 86 2326414 0010584 2 T/TR 02-09 E Page 9 80 70 60 50 40 30 20 10 v 5 E Eo + - 10 - 20 - 30 - 40 - 50 - 60 - 70 Temperature-Humidity-Ciiart O 10 20 30 40 50 60 70 80 90 1 O0 Relative Humidity (%) 200 150 1 O0 80 60 40 30 20 15 10 7 5 3 2 1 .5 .
37、2 .1 .O5 .o2 .o1 ,005 Figure 3 (T/TR 02-09). Class 3.3 Telecommunications Environment for a Stationary Installation (Weather-Protected: Not Temperature Controlled). Edition of September 1, 1986 ! CEPT T/TR*02-09*E 8b 2326434 0030585 4 T/TR 02-09 E Page 10 5.4. Class 3.4: Telephone booths and sites w
38、ith heat-trap This class is a combination of the parameters shown in CEPT Recommendation T/TR 02-06 (see also I E C Publication 721-3-3 classes 3K7/3B2/3C2(3C3)3S3/3M5). This class applies to a weather-protected location having neither temperature nor humidity control. The location may have openings
39、 directly to the open air, i.e. may be only partially weather-protected. The effect of direct solar radiation and heat-trap conditions exist. The climatogram is shown as Figure 4 (T/TR 02-09). This applies to locations: - where installed equipment may also be exposed temporarily to solar radiation a
40、nd temporarily to heat radiation. They may be exposed to movements of the surrounding air due to draughts, e.g. through doors, windows or other openings. They may be subjected to condensed water, to water from sources other than rain and to icing. They may be subjected to limited wind-driven precipi
41、tation including snow; - where mould growth, or attacks by animals, except termites, may occur; - with normal levels of contaminants experienced in urban areas with industrial activities scattered over the whole area and/or with heavy trafic; Note: At locations in the immediate neighbourhood of indu
42、strial sources with chemical emissions either special precautions must be taken or the special chemical class must be chosen. - in close proximity to sources of sand or dust; - where transmitted vibrations are experienced from machines or passing vehicles. Higher shock levels may be experienced e.g.
43、 from adjacent machines, etc. Note: For equipment intended for public use more severe mechanical conditions are expected. Special requirements should be used for such equipment. These requirements do not cover intentional damage by vandals. The conditions of this class may be found in - some sheds;
44、- shacks; - lofts; - telephone booths; - some buildings. Edition of September 1, 1986 CEPT T/TR*02-09*E 6 I 2326434 0030586 6 I TITR 02-09 E Page 11 80 70 60 50 40 30 20 u 10 v *iI 5 io E 2 - 10 - 20 - 30 - 40 - 50 - 60 - 70 Temperature-Humidity-Chart 90 100 O 10 20 30 40 50 60 70 80 Relative Humidi
45、ty (%) 200 150 1 O0 80 60 40 30 20 15 10 7 5 3 2 1 .5 .2 .1 .O5 .o2 .o1 .O05 Figure 4 (T/TR 02-09). Class 3.4 Telecommunications Environment for a Stationary Installation (Telephone Booths and Sites with Heat-Trap). Edition of September 1, 1986 CEPT T/TR*02-09*E 86 I 2326414 0010587 8 I TJTR 02-09 E
46、 Page 12 5.5. Class 3.5: Sheltered locations This class is a combination of the parameters shown in CEPT Recommendation T/TR 02-06 (see also I E C Publication 721-3-3 classes 3K7 low/3B2/3C2(3C3)3S3/3M5). This class applies to a shelter where direct solar radiation and heat-trap conditions do not ex
47、ist. The climatogram is shown as Figure 5 (T/TR 02-09). This class applies to locations: - where installed equipment may be exposed to heat radiation from the roof or walls heated by the sun. They may be exposed to movement of the surrounding air through openings. They may be subjected to condensed
48、water, to water from sources other than rain and to icing. They may be subjected to limited wind-driven precipitation including snow; - where mould growth, or attacks by animals, except termites, may occur; - with normal levels of contaminants experienced in urban areas with industrial activities sc
49、attered over the whole area and/or with heavy trafic; Note: At locations in the immediate neighbourhood of industrial sources with chemical emissions either special precautions must be taken or the special chemical class must be chosen. - in close proximity to sources of sand or dust; - where transmitted vibrations are experienced from machines or passing vehicles. Higher shock levels may be experienced e.g. from adjacent machines, etc. Note: For equipment intended for public use more severe mechanical conditions are expected. Special requirements should be used for suc
