The test method used to determine surface temperature for Ex equipment certification

The characteristics providing protection to explosion of equipment designed for use in potentially explosive atmospheres must be preserved during their entire period of life. Repairing is defined as the action to restore faulty equipment to its fully serviceable condition complying with the relevant standard (the standard to which the equipment or parts of equipment were originally designed). Repairing of explosion-proof equipment must be performed considering the prescription of the applicable harmonized standards and the specific type of protection(s) involved. This paper is focused on some particular aspects related to repairing of explosion-proof equipment.

“…The effects of surface finishes, paint etc., on the temperature class of enclosures shall be considered (only those specified by the manufacturer or equivalent can be applied) [3,10,11].…”

Section: Ex "E" Equipmentmentioning

confidence: 99%

Aspects regarding the repair of electrical equipment designed for use in potentially explosive atmospheres

Moldovan¹,

Magyari²

2022

“…Because increased safety "e" assumes that explosive atmosphere can enter inside the equipment, both internal and external surfaces shall be monitored and measured to determine the maximum surface temperature. In case of equipment with type of protection flameproof enclosure "d" (that can be applied on electrical equipment producing electrical arcs and sparks and as a consequence also to equipment not producing electrical arcs and sparks), because the principle of this type of protection assumes that an explosion can occur inside the enclosure of the equipment [6], only the temperature on external surfaces is monitored when determining the maximum surface temperature [7]. If we compare the type of protection increased safety "e" with the type of protection flameproof enclosure "d" (where an explosion can occur inside the enclosure of the equipment) from the maximum surface temperature point of view, for an equipment having the same characteristics we can conclude that the higher values regarding the maximum surface temperature will be recorded for the increased safety "e" equipment.…”

Section: Aspects Regarding Installation Of Increased Safety "E" Equip...mentioning

confidence: 99%

Considerations on the type of protection increased safety “e”

Moldovan¹,

Salasan²,

Moldovan³

2022

Increased safety “e” represents a type of protection applied to electrical equipment or Ex Components in which additional measures are applied so as to give increased security against the possibility of excessive temperatures and against the occurrence of arcs and sparks. This type of protection cannot be applied to equipment producing electrical arcs and sparks in normal operation. This paper aims to underline some specific aspects regarding the equipment with type of protection increased safety.

“…The installation of an equipment must be made in accordance with its technical documentation [1,3,4,5,6,8,9]. Before the commissioning of an installation or equipment, an initial inspection must be performed and the results shall be recorded and retained [1].…”

Section: Specific Requirements For Inspectionsmentioning

confidence: 99%

Considerations regarding the inspection of equipment designed for use in potentially explosive atmospheres

Moldovan¹,

Magyari²,

Rad³

et al. 2021

The special characteristics providing protection to explosion for equipment design for use in potentially explosive atmospheres must be preserved during their entire period of use. Thus, the equipment designed for use in potentially explosive atmosphere shall be subjected to specific inspections in order to verify that the characteristics on which explosion protection is based were not depreciated in time. The purpose of the paper is to underline the importance of inspections in case of equipment intended to be used in potentially explosive atmospheres and to provide specific recommendations in this matter.