Improvement of the standardized procedure for verifying the quality of low-voltage electrical installations

Abstract

Periodic verification of the quality of low-voltage electrical installations is very important from the point of view of safety of people in the building from electric shock and initial fire caused by failures of low-voltage electrical installations (usually poor electrical contact). The standardized procedure for verifying the quality of electrical installations by electrical measurements involves checking which can determine with certainty only whether the protection system by automatic shutdown of the power supply in case of failure is effective or not. However, this check can only detect some poor electrical contacts in the circuit that are potential causes of fire. The paper provides an overview of research results conducted within the project of the Ministry of Education, Science and Technological Development of the Republic of Serbia (project record number 36018), on the basis of which the correction of the existing procedure of periodical verification of the quality of electrical installations is proposed. The proposed correction, which was developed based on the experience gained by performing periodical verification of the quality of electrical installations in the field, as well as analysis of measurement results obtained experimentally in laboratory conditions, allows poor electrical contacts to be detected in a timely manner.

Keywords

• low voltage electrical installations
• periodical verification
• poor electrical contact
• fire
• fault loop resistance