Here are some extracts from ABB Library to get deeper information about theory, basic techniques, applications and case studies.
A complete paper about selectivity, including theory and basic techniques, with specific indications on the implementation of selectivity between ABB low voltage circuit-breakers.
User Guide - Zone Selectivity via Ekip Link
User Guide - Zone Selectivity Test
Discover how to verify the accuracy of locking signals dispatched by the circuit breaker during fault occurrences with active zone logic discrimination. Unveil the intricacies of zone selectivity input status, intricately linked to the signal module of the device.
User Guide - IEC 61850 GOOSE Communication & Zone Selectivity
A representative case: an Iraqi oil & gas company requiring technologically advanced solutions to provide total protection against earth faults in any point of the plant and guarantee selectivity between the MV and LV circuit-breakers.
Advanced protection systems against earth fault: all the information you may need about the normative aspects of protection against earth fault and indirect contact (definition, types of distribution systems and prescriptions as regards the protection of human beings), ABB solutions (from RCDs to electronic trip units), and how to obtain selective coordination for the protection against earth faults.
An overview of the guidelines and requirements prescribed by the Standards for the design and construction of substations with installed power limited to 2000 kVA or two 1000 kVA MV/LV transformers.
Read more about the basic criteria for good protection of machines and plants in medium voltage networks.