Period
2005–2010
Client
Tehran Regional Electricity Company
Location
Tehran – Hemmat Expressway
Stage
Provisional delivery
Technical Specifications
• 400 kV section: two line feeders and two transformer feeders in a four-breaker ring arrangement
• 230 kV section: two line feeders, two transformer feeders, and one bus section feeder in single busbar arrangement
• 63 kV section: four overhead line feeders, eight cable line feeders, two transformer feeders, and one bus section feeder in single busbar arrangement
• 20 kV section: two incoming feeders, sixteen outgoing feeders, one bus section feeder, and one riser feeder in single busbar arrangement
• Equipped with seven single-phase transformers (20/230/400 kV), each rated at 167 MVA, with one transformer reserved as backup
• Special substation design includes overhead reserve busbars for 400 kV and 230 kV, enabling the reserve transformer to replace any of the six main units within a few hours
Moshanir responsibility:
Moshanir acted as consultant for:
• Electrical and civil design
• Equipment procurement
• Supervision of installation, testing, and commissioning
• Full engineering and supervisory services across phases I, II, and III
Key Achievements
• Capability to replace any 400 kV transformer within a few hours using the reserve transformer
• Enhanced reliability and operational flexibility of Tehran’s transmission network
