Considerations regarding the specific tests applicable to electric motors with type of protection flameproof enclosure „d” and type of protection increased safety

Abstract

The purpose of this paper is to present the importance of the specific tests for electric motors with type of protection flameproof enclosure „d” and type of protection increased safety „e” designed to be used in explosive atmosphere. Most of the equipment operating in potentially explosive atmospheres is represented by electric motors, which in most situations act on various other elements (e.g. pumps, valves, fans etc.). Even if electric motors for explosive atmospheres are designed and manufactured following some of the same principles as the ones used for other electric machinery, they have certain particularities related to their field of use. Thus, a series of specific restrictions and tests are required to be considered in their case. In order to verify explosion protection, the representative samples made available by explosion-protected equipment manufacturers are tested under the most unfavorable conditions that may occur in operation.