(c)_0002_Annex_2_20260608.pdf

This document is a technical specification annex for Work Order HB442895J to repair MV SF6 breakers in all electrical substations at Caserma Del Din. It provides detailed specifications for four complete switchgear systems with 24kV rated voltage, 630A rated busbar current, and 16kA rated short circuit current, all conforming to IEC 62271-200 standards.

The specification covers three primary switchgear models: ESS-K (single unit configuration with 750mm width modules), BLDG #55 CEP (multi-unit configuration with 500-750mm modules totaling 18,894.09 kg), and CEP 11kV (three-unit configuration). Each system includes detailed electrical data specifying 48VDC control voltage, internal lighting, anti-condensation heaters, arc gas relief systems, and voltage presence indicating systems (VDIS type). Key operational features include mechanical signaling devices, spring-charging motors, auxiliary contacts for earthing switches, circuit breakers with vacuum technology (VD4/Sec type), and comprehensive protection relays (REX615-B series) supporting line protection, three-phase overcurrent/earth-fault protection, and CBCM capabilities. All systems incorporate 750mm service trolleys for withdrawable apparatus, operating handles for disconnectors, lifting hooks, and end covers. The specifications mandate IEC 61850 protocol communication (Ethernet TCP-IP) with GOOSE interlock logic replacing conventional hard-wired blocking signal paths, and require internal routine factory acceptance testing without FAT. Dimensions range from 1320-1535mm depth, 2000-2300mm height, with weights from approximately 243kg to 18,894kg depending on configuration. Installation must respect IP3X protection rating with front, lateral, and rear accessibility (AFLR version) and comply with domestic packing standards for operation from -5°C to +40°C and storage at -5°C.