Literatures in the health areas are reported frequently on accidents caused by problems with shock during surgery in both patients as the clinical team. It should be noted that most electrical equipment, during use, is often in contact with the patient and / or with medical professionals. Therefore, the electric shock danger always exists in this environment. To avoid this, some equipment has been identified for monitoring IT-system and the use of these normally required by standards. The research described in this paper presents an electrical safety and information system in a critical environment on the hospital that meets the standard. This system has an insulation monitoring device and annunciator, part of the IT-system, with unpublished characteristics.