By Martin Robinson, CMRP Level III Thermographer President, IRISS Inc.
There exists a dangerous misconception regarding the “Arc Rating” of infrared (IR) windows or viewing panes. Many reliability and maintenance professionals are under the impression that an IR window will protect them in the event of an arc blast; still others are under the impression that installing IR windows will turn non-arc-rated switchgear or electrical equipment into “arc-rated” cabinets. Neither are the case and both misconceptions need to be corrected because they present very real safety concerns.
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