Contract 116/2023

Automatic Changeover Unit — SHMI-L, SF₆-insulated, 24 kV / 630 A

Scope & Outcome

Rabbat Electric executed the procurement, installation, testing, and commissioning of an SF₆-insulated SHMI-L automatic changeover unit (24 kV / 630 A) to provide rapid, dependable source transfer between MV feeders serving Tishreen Military Hospital in Damascus. The scheme supports selectable manual/automatic modes, dead-bus / live-bus checks, and coordinated mechanical/electrical interlocking for personnel and equipment safety.

Our scope covered interface engineering with existing MV panels, earthing and MV cable terminations, verification of permissives/interlocks and alarms, and integration of local/remote control philosophy. After functional testing and trip/close trials, the unit was commissioned and handed over with operating procedures. The result is improved supply continuity, shorter outage durations, and a more resilient MV intake for critical hospital loads.

Project Info

Year

2023

Location

Tishreen Military Hospital, Damascus, Syria

Direct Client

PETDE — Public Establishment for Transmission and Distribution of Electricity (Syria)

End Client

Syrian Ministry of Defense

Contractor

Rabbat Electric LLC

Deliverables

Engineering review of MV single-line, protection interfaces, and source-transfer logic
Procurement of SF₆-insulated SHMI-L 24 kV / 630 A automatic changeover unit
Installation, earthing, MV cable terminations, and interlocking checks
Functional testing: dead-bus / live-bus checks, permissives, alarms, and trip/close sequences
Commissioning with load trials and restoration sequence verification
Operator orientation on normal/emergency operation and safe switching
Handover documentation: settings/logic notes, test records, and maintenance guidance

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