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Projects on substation development are categorized into three groups that classify our work methodology:

  1. High Voltage Substation – Substation is generally outdoor switchyard with large towers or columns of galvanized steel. The distribution is of 132/33 kV or dual transformation from 132/33 kV to 33/11 kV. Power transformation ranges in an average of 50MVA or above. All the switchgears in the yard are supported on distinct columns with appropriate spacing. The circuit breakers are usually gas type and isolators are in horizontal orientation.


  1. Medium Voltage Substation – The power transformation is within the range of 30 MVA for 33/11 kV distribution. Air insulated Switchgear Substation has mounted isolators, Auxiliary Transformer and PT on gantry structure with CT, VCB erected on foundation. Gas insulated Switchgears are kept indoors with isolators PT, VCB and CT stored inside panels while transformers are kept outside.


  1. Medium Voltage Substation: Mostly Air Insulated Switchgears with average sized gantry structure of height 10m. Power transformation is below 10MVA for 33/11 KV distribution.it has similar properties to Medium voltage AIS substation but with lower power Transformation.

The 132/33 kV substation project was renovated by IDEAL in 6 other locations including Sylhet, Fenchugonj. Chatak. Bagherhat, Comilla and Chandpur in similar manner to Barishal under BPDB contract. Bay extensions were also done for the existing grid. Regarding Power Plant project. IDEAL underwent construction of 132kV Substation in Goalpara. Khulna and Ghorashal, Dhaka as deployed   by BPDB client. Goalpara Substation was since renovated over time for underground power transmission to other grid locations. Then DPDC laid us project for development and extension of Sayampur Grid Substation from 50 MW Rental Power Plant in Khulna. Likewise, in Chittagong, switchgear replacements were done for Sikalbaha Power Plant as per contract of BPDB. In Dhaka City, IDEAL upgraded Substation in two locations including Ullon and Digun on behalf of DESA

The Gantry Columns show that height levels are in range of 8 meter to 16 meterrange for large substation grid.  33 kV capacitor banks are also installed in this substation for 50MVAR Reactive Power Compensation.  Similar installation was done in Faridpur and Naogaon Grid Substation with addition of GIS and SF6 switchgears under the contract of BPDB.

33/11 kV Outdoor Substation Development


Our works on low Voltage Substation Development involver the construction of mid-size gantry tower outdoor switchyard along with installation of all AIS equipment and cabling. The project highlights represent our ability to build quality grade substation.

Construction. erection, installation, testing and commissioning of  33/11  kV (5MVA) substation at Madaripur & Meherpur PBS under Rural Electrical Board. Dhaka.

Construction. Erection, Testing and Commissioning of 7 nos. of 33/11 kV (10MVA) substation as subcontractor of CHICO-EP, China. Under 14 Town Power Distribution iltra. Project. BPDP

Supply, Installation. Testing and Commissioning of Joragate 33/11  kV Substation Materials under VVZPDCL.




Medium Voltage Substation Development


The projects associated with Medium Voltage Substation are mostly 33/11 kV

indoor type located in different territories of Dhaka City including Agargaon. Gulshan. Nikunja, Niketon. Mirpur, Digun, Banani, Joarshahara, Purbachal and Tongi. Only in Baridhara territory, outdoor substation was implemented. All these projects were deployed by DESCO utility to IDEAL for installation, erection and commissioning. The GIS and AIS equipment are enclosed in panel cabinets while the Transformers are kept outdoor as shown for Digun and Purbachal Substation. All 33/11 kV indoor substations have similar looks to the following images.