Power construction contractor · Hà Nội
Power Construction Installation 4 Song Hong Joint Stock Company
Building transmission lines and substations, plus civil, industrial, infrastructure, irrigation and water works. Operating without interruption since 2013.
Vision
- To be a dependable power construction contractor in northern Vietnam.
- To be capable of taking on transmission line and substation works as a turnkey package.
Mission
- Build to the approved design and hand over on schedule.
- Keep every worker safe on site, without exception.
Core values
- Safety: the first condition for every item of work.
- To the drawing: signed off at each handover stage.
- On schedule: crews moved between sites as the programme requires.
What the company can do
Each segment below appears as you scroll, summarising what the company delivers on site.
Lines and substations
Built 220KV substations and extended a 500KV substation.
Six fields of work
Power, industrial, civil, infrastructure, irrigation, water supply and drainage.
Turnkey or single items
We take on a whole project or just a few items within it.
Main contractor or consortium
We join projects as main contractor or as a consortium member.
Site safety
Safety measures and supervision follow procedure on every shift.
One shared system
Progress and materials run on one system that works without signal.
What we deliver
Each item below is inspected and handed over on its own, against the approved design. We take on a whole project turnkey, or just a few items within it.
Overhead transmission lines
Erecting steel towers, fitting cross-arms and insulator strings, stringing and tensioning conductors, then handing over the whole line per the approved design.
- Steel tower erection
- Cross-arms and insulator strings
- Conductor stringing and tensioning
Substation bays and equipment
Installing primary equipment, wiring secondary circuits inside the bay and completing every item ahead of energisation testing.
- Primary equipment
- Secondary wiring
- Completion before testing
Tower foundations, equipment plinths and concrete structures
Excavation and backfill, rebar fabrication, formwork and concrete pouring for line tower foundations, equipment plinths and retaining walls inside the substation.
- Line tower foundations
- Equipment plinths
- Retaining walls and concrete structures
Earthing systems
Driving earth rods, laying earthing conductors, exothermic welding and measuring earth resistance, with each section signed off before backfilling.
- Driving earth rods
- Laying and welding conductors
- Earth resistance testing
Cable trenches, utility trenches and duct runs
Building cable trenches, drainage channels, cable ducts and water supply or drainage runs within the project boundary.
- Cable and utility trenches
- Ducts and cable pulling pits
- Drainage channels
Supporting site works inside the fence
Levelling, aggregate surfacing, internal roads, boundary walls, railings, drainage channels and slope protection, handed over together with the main works.
- Levelling, surfacing, internal roads
- Boundary walls and railings
- Drainage channels and slope protection
Fields of work
We take on a project turnkey or item by item, joining as main contractor or as a consortium member.
Transmission lines and substations
Constructing power transmission lines and substations, installing both primary and secondary equipment.
Industrial works
Building workshops, factories and supporting facilities for production.
Civil works
Building housing, office premises and other civil structures.
Infrastructure
Internal roads, site levelling, fencing and technical infrastructure within the project boundary.
Irrigation works
Building and upgrading irrigation works per the approved design.
Water supply and drainage
Installing water supply, drainage and water treatment systems on site.
Track record
Projects built and handed over, in order of time. The scope runs from tower foundations, concrete structures and earthing systems through to substation equipment and supporting works inside the fence.
December 2009 and January 2010
Capacity upgrade at Chèm 220KV substation
Power construction crew II carried out the capacity upgrade, working through the night.
September 2014
Tháp Chàm 220KV substation
Equipment installation and work at height at Tháp Chàm 220KV substation.
September 2015
Sơn La 500KV substation extension
Craning equipment into place during the Sơn La 500KV substation extension.
February to June 2024
Nam Định 1 – Phố Nối 220KV line
Erecting an 83-metre tubular tower at Mỹ Hào, Hưng Yên and stringing conductors across spans 276-286.
Recognised on site
Commended by EVNNPT
The General Director of the National Power Transmission Corporation presented a commendation to the company on the working site.
2026
Site management fully digitised
Progress and materials moved onto one shared system that keeps working without a signal.
How we contract
- Take on a project turnkey or item by item
- Act as main contractor or as a consortium member
- Run crews on several sites at the same time
- Acceptance, quantity and safety records issued at every handover stage
Company photos
Photographs of the company at work on its construction sites.
Cable trench work: ducts laid on concrete supports before backfilling 
Stringing conductors on the Nam Định 1 – Phố Nối 220KV line, June 2024 
Erecting an 83-metre tubular tower at Mỹ Hào, Hưng Yên 
A line tower foundation poured and waiting for tower erection 
Rebar and formwork for a tower foundation at Bình Giang, Hải Dương 
Fitting insulator strings and primary equipment in a substation 
Working on a substation bay from scissor lifts 
Fitting cable terminations and connections at a substation 
Sơn La 500KV substation extension — September 2015 
Craning equipment at Sơn La 500KV substation — September 2015 
Tháp Chàm 220KV substation — September 2014 
Working at height at Tháp Chàm 220KV substation — September 2014 
Night work on the Chèm 220KV capacity upgrade — 1 January 2010 
Capacity upgrade at Chèm 220KV substation — December 2009 
Erecting steel line towers across hilly terrain 
Site gate carrying the crew safety notices 
Ground-breaking for the Hà Đông – Phủ Lý 220KV line reconductoring project 
Ground-breaking ceremony, Hà Đông – Phủ Lý 220KV line 
Visiting the crews working three shifts on the line 
Company leaders presenting gifts to a crew at a tower base 
The EVNNPT General Director presenting a commendation to the company 
Company head office in Đông Anh, Hà Nội 
Staff at the company head office 
Ceremony awarding the 30-year Party membership badge 
Presenting the 30-year Party membership badge to a staff member 
Company staff outing 
A company construction site
Photo 1 / 27
Photo 1 of 27
Company details
- Full name
- CÔNG TY CỔ PHẦN XÂY LẮP ĐIỆN 4 - SÔNG HỒNG
- English name
- POWER CONSTRUCTION INSTALLATION 4 - SONG HONG JOINT STOCK COMPANY
- Short name
- POWER CONSTRUCTION 4 - SONG HONG.,JSC
- Tax code
- 0106221111
- Head office
- Group 20, Lam Tien Village, Thu Lam Commune, Ha Noi City, Viet Nam
- Company type
- Joint stock company
- Operating since
- 2 July 2013
Contact
Telephone
Head office address
Group 20, Lam Tien Village, Thu Lam Commune, Ha Noi City, Viet Nam
Directions to the office