Climatic version UHL 4.2 according to GOST 15150. Climatic version. U- temperate climate

Russian and Latin designations of climatic modifications:

Climatic versions of products	Notation
	alphabetic		digital
	Russians	latin
For a macroclimatic region with a temperate climate**	At	(N)	0
For macroclimatic regions with temperate and cold climates**	UHL****	(NF)	1
For a macroclimatic region with a humid tropical climate***	TV	(TN)	2
For a macroclimatic region with a dry tropical climate***	TS	(TA)	3
For macroclimatic regions with both dry and humid tropical climate***	T	(T)	4
For all macroclimatic regions on land, except for a macroclimatic region with a very cold climate (general climatic version)	O	(U)	5
For a macroclimatic region with a moderately cold maritime climate	M	(M)	6
For a macro-climatic region with a tropical maritime climate, including coastal vessels or other vessels intended for navigation only in this region	TM	(MT)	7
For macroclimatic regions with both moderately cold and tropical maritime climates, including ships with an unlimited navigation area	OM	(MU)	8
Products intended for operation in all macroclimatic regions on land and at sea, except for a macroclimatic region with a very cold climate (all climatic versions)	AT	(W)	9

** Products in executions At and UHL can be operated in warm humid, hot dry and very hot dry climatic regions in accordance with GOST 16350, in which the average of the annual absolute maximum air temperatures is above 40 ° C and (or) a combination of temperature equal to or above 20 ° C and relative humidity equal to or above 80%, observed more than 12 hours per day for a continuous period of more than two months per year.

Specific types or groups of exported products for a macroclimatic subregion with a warm temperate climate are allowed to be manufactured in a climatic version THAT. if the design differences between the products of this version and the products of the climatic version U.

*** These executions may be designated by the term "tropical execution".

**** If the main purpose of the products is operation in an area with a cold climate and it is not economically feasible to use them outside this area, instead of the designation UHL designation recommended HL (F).

From the tropical macroclimatic region can be distinguished: humid tropical climate (designation TV) and dry tropical climate (symbol TS).

For marine macro-regions, the following designations can be used: TM- tropical maritime climate; OM- Tropical and temperate maritime climate.

The second part of the designation (number):

Index	Characteristic	Addition	Designation (decimal)
1	For outdoor operation (impact of a combination of climatic factors characteristic of a given macroclimatic region)	For storage during operation in rooms of category 4 and work both in conditions of category 4 and (for a short time) in other conditions, including outdoors	1.1
2	For operation under a canopy or in rooms (volumes) where fluctuations in temperature and humidity do not differ significantly from fluctuations in the open air and there is relatively free access to outside air, for example, in tents, bodies, trailers, metal rooms without thermal insulation, as well as in a shell complete product category 1 (no direct exposure to solar radiation and precipitation)	For operation as built-in elements inside complete products of categories 1; 1.1; 2, the design of which excludes the possibility of moisture condensation on built-in elements (for example, inside radio-electronic equipment)	2.1
3	For operation in enclosed spaces (volumes) with natural ventilation without artificially controlled climatic conditions, where temperature and humidity fluctuations and exposure to sand and dust are significantly less than outdoors, for example, in metal with thermal insulation, stone, concrete, wooden rooms ( no impact of atmospheric precipitation, direct solar radiation; significant reduction of wind; significant reduction or absence of exposure to scattered solar radiation and moisture condensation)	For operation in irregularly heated rooms (volumes)	3.1
4	For operation in rooms (volumes) with artificially controlled climatic conditions, for example, in closed heated or cooled and ventilated industrial	For use in air-conditioned or partially air-conditioned rooms	4.1
	Including - well-ventilated underground rooms (no exposure to direct solar radiation, precipitation, wind, sand and dust from outdoor air; no or significant reduction in the impact of scattered solar radiation and moisture condensation)	For operation in laboratory, capital residential and other similar premises	4.2
5	For operation in premises (volumes) with high humidity (for example, in unheated and unventilated underground premises, including mines, basements, in the soil, in such ship, ship and other premises in which a long-term presence of water or frequent condensation of moisture on walls and ceiling, in particular, in some holds, in some workshops of textile, hydrometallurgical industries, etc.).	For operation as built-in elements inside complete products of categories 5, the design of which excludes the possibility of moisture condensation on built-in elements (for example, inside radio-electronic equipment)	5.1

Depending on the macroclimatic region (or regions) chosen by the manufacturer, GOST 15150 (table 3 page 9 and table 6 page 11) assigns a range of air temperatures and relative humidity (the standard introduces many amendments for specific cases, see the original).

Ambient temperature values ​​during product operation

Product execution	Product category	Air temperature value during operation, °C
		Working		Limit working
		upper	bottom	upper	bottom
U, TU	1; 1.1; 2;
	2.1; 3	+40	-45*	+45	-50*
	3.1	+40	-10*****	+45	-10*****
	5; 5.1	+35	-5	+35	-5
HL	1; 1.1; 2;
	2.1; 3	+40	-60	+45	-70
	3.1	+40	-10*****	+45	-10*****
	5; 5.1	+35	-10	+35	-10
UHL	1; 1.1; 2;
	2.1; 3	+40	-60	+45	-70
	3.1	+40	-10*****	+45	-10*****
	4	+35	+1	+40	+1
	4.1	+25	+10	+40	+1
	4.2	+35	+10	+40	+1
	5; 5.1	+35	-10	+35	-10
TV	1; 1.1; 2; 2.1;
	3; 3.1	+40	+1	+45	+1**
	4	+40	+1	+45	+1
	4.1	+25	+10	+40	+1
	4.2	+45	+10	+45	+10
	5; 5.1	+35	+1	+35	+1
T, TS	1; 1.1; 2;
	2.1******;	+50********	-10	+60	-10***
	3; 3.1
	4*******	+45	+1	+55	+1
	4.1*******	+25	+10	+40	+1
	4.2*******	+45	+10	+45	+10
	5; 5.1	+35	+1	+35	+1
O	1; 1.1; 2; 2.1	+50********	-60	+60	-70
	4	+45	+1	+55	+1
	4.1	+25	+10	+40	+1
	4.2	+45	+10	+45	+1
	5; 5.1	+35	-10	+35	-10
M	1; 1.1; 2
	2.1; 3; 5; 5.1	+40	-40****	+45	-40
	4; 3.1	+40	-10*****	+40	-10*****
	4.1	+35	+15	+40	+1
	4.2	+40	+1	+40	+1
TM	1; 1.1; 2;
	2.1; 3; 5; 5.1	+45	+1	+45	+1
	4	+45	+1	+45	+1
	4.1	+25	+10	+40	+1
	4.2	+45	+1	+45	+1
OM	1; 1.1; 2; 2.1;
	3; 5; 5.1	+45	-40****	+45	-40
	4; 3.1	+45	-10*****	+45	-10*****
	4.1	+35	+15	+40	+1
	4.2	+40	+1	+40	+1
AT	1; 1.1; 2; 2.1; 3	+50********	-60	+60	-70
	3.1	+50********	-10*****	+60	-10*****
	4	+45	-10*****	+55	-10*****
	4.1	+25	+10	+40	+1
	4.2	+45	+1	+45	+1
	5; 5.1	+45	-40	+45	-40

* For products that, according to operating conditions, may have interruptions in operation at occasionally occurring temperatures below minus 40 ° C, the lower operating temperature value is allowed, in technically justified cases, to be taken equal to minus 40 ° C.

For performance specifications, the lower operating temperature value is assumed to be minus 25°С, the lower limit operating temperature value is minus 30°С.

** For some areas with a subtropical climate, the value is taken equal to minus 10 ° C.

*** For some areas in China, Turkey, Afghanistan, the value is taken equal to minus 20 ° C.

**** For ships not used in areas of the Arctic Ocean in winter, the lower operating temperature is assumed to be minus 30°C.

***** For operation in a non-operating state (for operational storage and transportation), the value is taken the same as for category 3, and for the type of climatic modification B4 - as for the type of modification OM3.

****** To perform T.

******* For the implementation of the TS.

******** For some points in the Central Sahara, the temperature is assumed to be 55 ° C. It is allowed to set a temperature of 45°C for products developed before 07/01/89 and not supplied to the regions of Iraq, the countries of the Arabian Peninsula, Southern Iran and Central Sahara.

For surfaces exposed to solar heating, the upper, average and limiting operating temperatures should be taken higher than those indicated in Table. 3 for products of category 1, by the following values:

• for surfaces that have a white or silver-white color - by 15 ° C;
• for surfaces that have a color other than white or silver-white - by 30 ° C.

Note. For category 1 products; 1.1; 2; 3, intended for the regions of the CIS, it is allowed to be guided by Appendix 4 regarding the lower temperatures.
The average temperature value is taken equal to the average annual value according to the table. 6.

Product design	Product category	Relative Humidity		absolute humidity,
		Average annual value	Upper value *	average annual value g×m-3
UHL	4; 4.1; 4.2	60% at 20°C	80% at 25°C	10
U, UHL (HL*5)	1; 2	75% at 15°C	100% at 25°C	11
THAT	1.1	70% at 15°C	98% at 25°C	10
	2.1; 3; 3.1	75% at 15°C	98% at 25°C	11
	5***	90% at 15°C	100% at 25°C	13
	5.1	90% at 15°C	98% at 25°C	13
TS	1; 2 1.1; 3; 3.1;	40% at 27°C	100% at 25°C	10
	4; 4.1; 4.2	40% at 27°C	80% at 25°C	10
	5	90% at 15°C	100% at 25°C	13
	5.1	90% at 15°C	80% at 25°C	13
TV, T, O, V	1; 2; 5	80% at 27°C	100% at 35°C****	20
TM, OM**	1.1	75% at 27°C	98% at 35°C	17
	2.1; 5.1	80% at 27°C	98% at 35°C	20
TV, T, V	3	75% at 27°C	98% at 35°C	17
TM*6, OM**	3.1	75% at 27°C	98% at 35°C	17
TV, O, V	4	75% at 27°C	98% at 35°C****	17
TM, OM**	4.1	60% at 20°C	80% at 25°C	10
	4.2	75% at 27°C	98% at 35°C	17
M	1; 2	80% at 22°C	100% at 25°C	15
	1.1	75% at 22°C	98% at 25°C	11
	2.1	80% at 22°C	98% at 25°C	15
	3; 4; 3.1	75% at 22°C	98% at 25°C	11
	4.1	60% at 20°C	80% at 25°C	10
	4.2	75% at 22°C	98% at 25°C	11
	5	80% at 22°C	100% at 25°C	15
	5.1	80% at 22°C	98% at 25°C	15

* The upper value of relative humidity indicated in the table is also standardized at lower temperatures; at higher temperatures the relative humidity is lower.

At a normalized upper value of 100%, moisture condensation is observed, at a normalized upper value of 80% or 98%, no moisture condensation is observed.
A value of 80% at 25°C corresponds to a value of 90% at 20°C or 50 - 60% at 40°C.

** For marine vessels of the OM version, intended for a short stay in areas with a tropical climate, the values ​​of the combination of temperature and humidity can be taken the same as for the M version.

*** For products intended for coal mines, the humidity values ​​​​are taken the same as for version T.

**** For products of types of climatic modifications OM4 and OM5, installed in the engine and boiler rooms of ships, the upper limit operating value is 100% at 50°C.

* 5 For CL version of all placement categories, except for 5; 5.1, the average annual value is -85% at minus 6 °C.

* 6 For the execution of TM placement categories 1; 2; 5; 2.1; 5.1 also applies an annual average of 70% at 29°C

For outdoor products (location category 1), which can be heated by sunlight, the upper values ​​​​of operating and limiting temperatures are increased by:

• +15ºС - white or silvery white surface;
• +30ºС - surfaces with colors different from those indicated above.

At the rated upper value of relative humidity of 100%, condensate is formed, at the rated values ​​of 80% and 98%, moisture condensate does not occur.

The combination of letters and numbers gives the climatic design and placement category:

• U1, U2, U3 (moderate macroclimate, work outdoors or indoors);
• HL1, HL2, HL3 (cold macroclimate, operation outdoors or in a building);
• UHL1, UHL2, UHL3, UHL4 (a combination of moderate and cold macroclimate, do not confuse the number "3" with the letter "Z");
• T1, T2, T3, T4;
• O1, O2, O3.

Distribution of the state standard GOST 15150-69

All requirements set forth in this standard are mandatory, except for requirements defined as recommended or permitted.
The standard is applicable to all types of machines, devices and other technical products. Climatic GOST 15150 divides the globe into climatic regions, and also defines versions, categories, operating conditions, storage and transportation.

• general provisions applicable in particular to circuit breakers;
• description of climatic modifications and categories of products;
• determination of normal values ​​of environmental climatic factors;
• requirements for products (circuit breakers) in terms of climate impact;
• requirements for products in terms of nominal values ​​of climatic factors during operation;
• effective values ​​of climatic factors;
• operating conditions of metals and other materials;
• how to apply products for temperate climates in cold or tropical areas;
• use of products at a higher height than the specified nominal;
• description of storage and transportation conditions;
• several appendices detailing some of the factors.

Discrepancy between this climatic standard GOST 15150-69 and the international IEC

For several good reasons, it is impossible to talk about work to bring the IEC international standard into conformity with the regulations in the CIS.

The difference in standards lies in the following (IEC shortcomings):

• there is no clear division between climates in the IEC;
• there is an irrational grouping of climates;
• each specific operating condition is assigned its own climatic class according to a single climatic parameter;
• in the international system there are no divisions into maritime and oceanic climates;
• on the territory of the CIS, the international IEC selects unfortunate lower temperatures, which leads to inappropriate climatic zoning.

IEC 721-3 series standards are currently under revision, so harmonization of climate regulations cannot yet be implemented.

Some examples of climate modifications and placement categories

• UHL1 example. Flexible cable of the KG brand for movable connection of electrical installations, as well as a power cable of the VVG brand, are produced in the UHL1 version (suitable for a temperate and cold area when working under the influence of atmospheric factors).
• UHL3 example. Most of the circuit breakers are assigned UHL version (for macroclimatic regions with a temperate and cold climate) placement category 3 (operation in enclosed spaces with natural ventilation, where the effects of temperature, humidity and dust are lower than in open space; no exposure to rain, snow, solar radiation , wind).
• UHL4 example. PML magnetic starters have UHL climatic design with placement category 4 (creation of artificial climatic conditions, closed heated rooms with forced ventilation).
• Example U1. Industrial explosion-proof NSP luminaires are manufactured in U1 climatic design (workable in a moderate macroclimatic region when operating in open space). More in this category: " GOST R 52766-2007 Public motor roads

The tables are given in accordance with GOST 15150-69: Machines, instruments and other technical products of execution for various climatic regions. Categories, conditions of operation, storage and transportation in terms of the impact of climatic factors of the environment.

Approved and put into effect by Decree of the State Standard of the USSR of December 29, 1969 N 1394 (as amended by Change No. 1, approved in January 1978, Change No. 2, approved in December 1982, Change No. 3, approved. in October 1988, Amendments No. 4, approved in September 1999, Amendments published in IUS, No. 3, 2004)

Climatic version U1, U2, U3, T1, T2, T3, UHL1, UHL4, UT1.5

Marking(a brief description of protective coatings, types of climatic modification and categories of product placement, degrees of protection).

Products designed for various climatic regions, categories, operating and storage conditions in terms of the impact of climatic environmental factors are marked in accordance with GOST 1 51 50-69. According to the degree of protection provided by the shells, the products are marked in accordance with GOST 14254-96.

Marking U1 means - products for use in areas with a temperate climate with placement category 1 (outdoors).

Marking U2 means - products for use in areas with a temperate climate with placement category 2 [under a canopy or in rooms with free air access).

UZ marking means - products for operation in areas with a temperate climate with a category of placement 3 (in the closed rooms with natural ventilation).

Marking T1 .T2.TZ means - products for operation in areas with both dry and humid tropical climates, with placement in the open air, under a canopy, in enclosed spaces with natural ventilation.

Marking UHL1 means - products for operation in areas with a temperate and cold climate with placement category 1 (outdoors).

Marking UHL-4 means - products for operation in areas with a temperate and cold climate with placement category 4 (in rooms with artificially controlled climatic conditions).

Marking UT1.5 means - products for operation both in areas with a temperate climate and in areas with a dry or humid tropical climate, both with placement category 1 (outdoors) and placement category 5 (in rooms with high humidity).

Particular requirements for the material of products are imposed by a temperate and cold climate (UHL), due to low operating temperatures, therefore, products intended for operation in areas with UHL1 must be made of materials that retain their properties at a temperature of minus 70°C.

The index "c" in the product marking indicates a zinc coating obtained by hot-dip galvanizing.

Letter "X" In the product labeling, it denotes a chemical resistant coating.

It must be understood that products, for example, intended for use in temperate areas of placement category 1 can also be used in temperate areas of placement categories 2, 3 or 4, but not vice versa. Similarly: products with marking UT1.5 can replace products with labeling U1, U2, UZ, T1 T2.TZ.

Temperate climate, or temperate climate, is typical for the temperate geographical zone of the predominantly Northern Hemisphere, between 40-45 and 62-68 ° C. sh. and 42 and 58 °S. sh. In the Northern Hemisphere, over 1/2 of the surface of the temperate zone is occupied by land, in the Southern - 98% of the territory is covered by the sea. The temperate climate is characterized by frequent and strong changes in air pressure and temperature and wind direction, which occur due to the intense activity of cyclones.

tropical climate- type of climate typical of the tropics. According to the climate classification adopted by W. P. Köppen, it is defined as a non-arid climate in which the average temperature is above 18 ° C (64.4 ° F) for all 12 months of the year.

The tropical climate is characterized by small seasonal temperature fluctuations. In the Northern Hemisphere in the north, the tropics pass into the subtropics, in the south - into the subequatorial belt.

The tropical climate is divided (according to precipitation) into two sub-belts: the tropical dry climate and the tropical humid climate. The first type of climate is characteristic of almost all tropical deserts, the second - for oceanic islands located in low latitudes.

Versions for different climatic regions, categories, operating conditions, storage and transportation in terms of the impact of environmental factors, in particular for circuit breakers, cables and lamps (climatic GOST 15150-69). Description of the standard, link to the document, inconsistencies between IEC and GOST, decoding UHL1, UHL2, UHL3, UHL4, U1, U2, U3, U4

Description of the most common climatic versions: UHL1, U1, UHL2, U2, UHL3, U3, UHL4, U4 and others

• At – at measured macroclimatic region;
• HL – X about l one macroclimatic region;
• UHL- an association at measured and X about l one macroclimatic region
• T – t tropical macroclimatic region;
• O – about general land area, excluding areas with very low temperatures;
• M- macroclimatic region with temperate cold m ora climate;
• AT – in all regions of the globe, excluding parts of the earth with very low temperatures (for example, Antarctica).

From the tropical macroclimatic region can be distinguished: in wet t TV) and With ear t tropical climate (designation TS).
For marine macro-regions, the following designations can be used: TM– tropical maritime climate; OM- Tropical and temperate maritime climate.

The second part of the designation (number):

• 1 - exploitation outdoors with the influence of any atmospheric factors (rain, heavy rain, snow, dust in strong winds);
• 2 - exploitation under a canopy(protection against vertical jets of water, splashing, dust, snow are allowed);
• 3 - exploitation indoors without temperature control with natural ventilation (the temperature practically does not differ from the street temperature, there are no splashes and jets of water, a small amount of dust);
• 4 - exploitation indoors with heating and with artificial ventilation (regulation of temperature conditions, no low temperatures, low concentration of dust);
• 5 - work in wet confined spaces without heating and ventilation, in the presence of water or condensate (for example, mines, ship holds, cellars).

Depending on the macroclimatic region (or regions) chosen by the manufacturer, GOST 15150 (table 3 page 9 and table 6 page 11) assigns a range of air temperatures and relative humidity (the standard introduces many amendments for specific cases, see the original).

Macroclimatic region (or regions)	Accommodation category	Operating temperatures, ºС		Limit operating temperatures, ºС		Relative Humidity
		negative	Positive	Min	Max	Average annual	Upper value
At	1 and 2	-45	+40	-50	+45	75% at 15ºС	100% at 25ºС
	3	-45	+40	-50	+45	75% at 15ºС	98% at 25ºС
HL	1 and 2	-60	+40	-70	+45	75% at 15ºС	100% at 25ºС
	3	-60	+40	-70	+45	75% at 15ºС	98% at 25ºС
UHL	1 and 2	-60	+40	-70	+45	75% at 15ºС	100% at 25ºС
	3	-60	+40	-70	+45	75% at 15ºС	98% at 25ºС
	4	+1	+35	+1	+40	60% at 20ºС	80% at 25ºС
T	1 and 2	-10	+50	-10	+60	80% at 27ºС	100% at 35ºС
	3	-10	+50	-10	+60	75% at 27ºС	98% at 35ºС
	4	+1	+45	+1	+55
O	1 and 2	-60	+50	-70	+60	80% at 27ºС	100% at 35ºС
	4	+1	+45	+1	+55	75% at 27ºС	98% at 35ºС

For products operated outdoors (location category 1), which can be heated by the sun, the upper values ​​of operating and limit temperatures are increased by:

• +15ºС – white or silvery white surface;
• +30ºС - surfaces with colors different from those indicated above.

At the rated upper value of relative humidity of 100%, condensate is formed, at the rated values ​​of 80% and 98%, moisture condensate does not occur.

A combination of letters and numbers give climatic design and placement category:

• U1, U2, U3 ( at measured macroclimate, work outdoors or indoors);
• HL1, HL2, HL3 (cold macroclimate, operation outdoors or in a building);
• UHL1, UHL2, UHL3, UHL4 (combination at measured and X about l one macroclimate, do not confuse the number "3" with the letter "Z");
• T1, T2, T3, T4;
• O1, O2, O3.

Distribution of the state standard GOST 15150-69

All requirements set forth in this standard are mandatory, except for requirements defined as recommended or permitted.
The standard is applicable to all types of machines, devices and other technical products. Climatic GOST 15150 divides the globe into climatic regions, and also defines versions, categories, operating conditions, storage and transportation.

The standard contains the following chapters:

• general provisions applicable in particular to circuit breakers;
• description of climatic modifications and categories of products;
• determination of normal values ​​of environmental climatic factors;
• requirements for products (circuit breakers) in terms of climate impact;
• requirements for products in terms of nominal values ​​of climatic factors during operation;
• effective values ​​of climatic factors;
• operating conditions of metals and other materials;
• how to apply products for temperate climates in cold or tropical areas;
• use of products at a higher height than the specified nominal;
• description of storage and transportation conditions;
• several appendices detailing some of the factors.

Discrepancy between this climatic standard GOST 15150-69 and the international IEC

For several good reasons, it is impossible to talk about work to bring the IEC international standard into conformity with the regulations on the territory of Russia.

The difference in standards lies in the following (IEC shortcomings):

• there is no clear division between climates in the IEC;
• there is an irrational grouping of climates;
• each specific operating condition is assigned its own climatic class according to a single climatic parameter;
• in the international system there are no divisions into maritime and oceanic climates;
• on the territory of the CIS, the international IEC selects unfortunate lower temperatures, which leads to inappropriate climatic zoning.

IEC 721-3 series standards are currently under revision, so harmonization of climate regulations cannot yet be implemented.

Some examples of climate modifications and placement categories

UHL1 example. Flexible cable of the KG brand for movable connection of electrical installations, as well as a power cable of the VVG brand, are produced in the UHL1 version (suitable for a temperate and cold area when working under the influence of atmospheric factors).

UHL3 example. Most of the circuit breakers are assigned UHL version (for macroclimatic regions with a temperate and cold climate) placement category 3 (operation in enclosed spaces with natural ventilation, where the effects of temperature, humidity and dust are lower than in open space; no exposure to rain, snow, solar radiation , wind).

UHL4 example. PML magnetic starters have UHL climatic version with placement category 4 (creation of artificial climatic conditions, closed heated rooms with forced ventilation).

Example U1. Industrial explosion-proof NSP luminaires are manufactured in U1 climatic design (workable in a moderate macroclimatic region when operating in open space).

U1- products for operation in areas with a temperate climate with placement category 1 (outdoors).

U2- products for operation in areas with a temperate climate with placement category 2 (under a canopy or in rooms with free air access).

UZ- products for operation in areas with a temperate climate with placement category 3 (indoors with natural ventilation).

Т1.Т2.ТЗ- products for operation in areas with both dry and humid tropical climates, with placement in the open air, under a canopy, in enclosed spaces with natural ventilation.

UHL1- products for operation in areas with a temperate and cold climate with placement category 1 (outdoors).

UHL4- products for operation in areas with a temperate and cold climate with placement category 4 (in rooms with artificially controlled climatic conditions).

UT1.5- products for use in areas with a temperate climate
and in areas with a dry or humid tropical climate, both with placement category 1 (outdoors) and placement category 5 (in rooms with high humidity).

Index "C" In the product labeling, it denotes a zinc coating obtained by hot dip galvanizing.

Letter "X" In the product labeling, it denotes a chemical resistant coating.

Climatic performance		Accommodation category
At	With a temperate climate. The average of the annual absolute maximum air temperatures is equal to or below +40 ° C, the average of the annual absolute minimums is above -45 °С. Operating temperature range during operation -45...+40 °C	1	Exploitation outdoors with the influence of any atmospheric factors (rain, heavy rain, snow, dust in strong winds)
HL	With a cold climate. The average of the annual absolute minimum temperatures is below -45 °С. Operating temperature range during operation -60...+40 °С	2	For work indoors where fluctuations in air humidity are not very different from fluctuations in the open air, for example: in tents, bodies, trailers, metal premises without thermal insulation, as well as in casings of category 1 complete devices or under a canopy (there is no direct effect of solar radiation and precipitation on the product)
UHL	With a temperate and cold climate. Operating temperature range during operation -60...+40 °C	3	For work in enclosed spaces with natural ventilation, without artificial regulation of climatic conditions, where fluctuations in temperature and humidity, as well as the effect of sand and dust, are much less than outside, for example: in a metal thermally insulated, stone, concrete, wooden rooms (significant reduction in the action of solar radiation, wind, precipitation, lack of dew)
T	tropical climate	4	For work in rooms with an artificially controlled microclimate, for example: in covered heated and ventilated industrial and other, including underground, premises with good ventilation (no direct action of precipitation, wind, as well as sand and dust of external air)
TV	Humid tropical climate. The combination of temperature equal to or above +20 °C and relative humidity above 80% is observed 12 or more hours a day for a continuous period of more than 2 months (chloride concentration - less than 0.3 mg / m² day, sulfur dioxide - 20-250 mg / m² day). Operating temperature range during operation +1...+40 °С		For work in rooms with high humidity
TS	Dry tropical climate. The average of the annual absolute maximum air temperatures is above +40 °C (chloride concentration is less than 0.3 mg/m² day, sulfur dioxide concentration is 20-250 mg/m² day). Operating temperature range during operation -10...+50 °C
O	General climatic version (except for marine). For macroclimatic regions on land, except for an area with a very cold climate (chloride concentration - 0.3-30 mg / m² day, sulfur dioxide - 20-250 mg / m² day). Operating temperature range during operation -60...+50 °C
M	Maritime temperate cold climate
MO	General climatic marine version
AT	All-climatic execution. For macroclimatic areas on land and at sea, except for an area with a very cold climate (chloride concentration - 0.3-300 mg / m² day, sulfur dioxide - no more than 250 mg / m² day). Operating temperature range during operation -60...+50 °С

Special requirements for the material of products, due to low operating temperatures, are imposed by a temperate and cold climate (UHL). Therefore, the main requirement for products intended for operation in areas with UHF1 is that they must be made of materials that retain their properties at temperatures down to -70 ˚С.

It should be understood that products, for example intended for use in temperate areas of location category 1, may also be used in temperate areas of location category 2, 3 or 4, but not vice versa.
Similarly: products labeled UT1.5 can replace products labeled U1, U2, UZ, T1.T2.TZ.

Execution	Category accommodation	T air temperature
		working		Limit working
		Max	Min	Medium	Max	Min
At	1,2	+40	-45	+10	+45	-50
	3	+40	-10	+10	+45	-10
HL	1,2	+40	-60	+10	+45	-60
	3	+40	-10	+10	+45	-10
UHL	1,2	+40	-60	+10	+45	-60
	3	+40	-10	+10	+45	-10
TV	1,2	+25	+1	+27	+50	+1
	3	+45	+10	+20	+40	+1
T, TS	1,2,3	+45	-10	+27	+55	-10
	4	+45	+1	+27	+55	+1
O	1,2	+45	-60	+27	+55	-60
M	1	+40	-45	+10	+45	-50
TM	1	+45	+1	+27	+50	+1
OM	1	+45	-60	+27	+55	-60
AT	1	+45	-60	+27	+55	-60