The protection against the unintentional islanding of Grid-Tied inverters is an important electrical security issue addressed by the main Standards. This concern is justified in face of the fact that unintentional islanding can lead to abrupt variations of voltage and frequency. electrical damages. professional accidents. https://echobookmarks.com/story19493469/bacterial-assessment-of-food-handlers-in-sari-city-mazandaran-province-north-of-iran