Ingress protection

So, two different methods (called practice A and practice B in IEC 61241-1-2) may be used to define the maximum allowable surface temperature of an electric apparatus and to ensure its dust ingress protection ... 

In the high voltage range, the creepage distances are identical to those for pollution degree 3. It should be remembered that increased safety asks for IP 54 as an adequate ingress protection degree for the enclosure (with bare live parts inside). 

Rated power 150 W Ballast special type Frequency of lamp current 250 kcps Marking Ex II 2G EEx ed NO T4 Type of protection EEx ed IIC T4 Certificate PTB 99 ATEX 2065 Rated voltage AC/DC 220-240 V Ingress protection code IP 54 Rated luminous flux 120001m Luminous efficiency 80lm/W Dimensions (L x W x H) 652 x 400 x 205 mm (b) Induction lamp. 

A certain problem of electrical installations with a high degree of ingress protection against solid foreign bodies and water is the exchange of internal... 

High operational reliability when surrounded by an environment formed mainly by combustible dusts and a very high degree of dust ingress protection - this is the users experience over long periods and opens the field of application for p-enclosures in zones 11, or 21 and 22. 

Ingress protection (IP) rahng of the housing (e.g., weatherproof, dust-right)... 

The main EC standard for low voltage switchgear assemblies is 1EC60439 which has seven parts. Part 1 covers the basic reqnirements for internal separation, compartments, barriers and partitions. It nses the IPXY notation of 1EC60529 as a basis for the ingress protection, mainly concentrating on X for access by tools, fingers, hands, small particles and dust. The minimum value of X used in... 

F. Motors Motors, like transformers, are another problem facing machine builders. Various standards specify construction and overload protection requirements for motors (EN 60034, 60742, 60664, 60204-1). Motors must meet the requirements for dimensions, construction, insulation class, connection, overload protection, ingress protection, markings, abnormal testing, and other parameters. 

EN 60529 outlines an international classification for the sealing effectiveness of enclosures of electrical equipment against the intrusion into the equipment of foreign bodies (i.e., dust, tools, fingers) and moisture. This classification system utilizes the letters IP (Ingress Protection) followed by two digits. An X is used for one of the digits if there is only one class of protection i.e. IP X4 which addresses moisture resistance only. 

FIGURE 6-6 Ingress Protection (IP) Levels per EN 60529 (lEC 529). Courtesy of Panel Components Corp., Oskaloosa, lA. 

A trade association for electrical equipment manufacturers, historically responsible for developing U.S. standards and now contributing to global standards and harmonization. It is the author of the NEMA 250 standard, an alpha-numeric coding system defining the level of ingress protection for electrical enclosures. 

EPL lEC So far as lEC is concerned the various protection types and associated lEC standard references have been elaborated at the beginning of Clause 3.3 (under lEC standard). The EPL for gas with applicable zone and protection principles is elaborated in Table X/3.3.4-2 to help in the selection process. For EPL symbols see Clause 3.2.3. Ingress protections (IPs) mentioned in the table are covered in Clause 3.6 of this chapter. 

Intrinsic safety circuit use (in %). IP, ingress protection RTD, resistance temperature detector T/C, thermocouple. 

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