Dangote Cement Plant has a production capacity of 1.5 million metric tonnes per annum and is expected to be the biggest such facility in the Central African country. The scope of Skipper’s order was to Design, Engineering, Procurement, Supervision of installation of Equipment, Testing, Commissioning of 110/11kV Substation and associated infrastructure at site.
Skipper has been commended again by key stakeholders in West African Governments for the quality of electrical products as well as its strong EPC capabilities.
A team from Federal Minister of Power, Nigeria and Transmission company of Nigeria led by Mrs. Sapke Briskilla Ibrahim, Director (Distribution) visited Skipper factory in Bhiwadi, India on 5th & 6th July, 2017 for Factory Acceptance Test. It was a successful FAT on Skipper made Products.
Engr. Dahiru Isyaku, TCN during his visit said, ” Skipper is growing strength to strength. The new factory is very clean and provides conducive environment for dedicated personnel to operate.
With EHV Transformer manufacturing, Skipper is ready to compete other transformer manufacturers globally. The human resource is highly competent.” Skipper Nigeria has already completed its previous order of 2X60MVA, 132/33kV for the connection of Gurara Hydro Power Project to Kaduna State Industrial area and now is providing the balance material against the variation order. In domestic front, one of the most progressive utility Gujarat Energy Transmission Corporation Ltd. has awarded Skipperseil with vender development order for 500MVA, 400/220/33kV Transformer on the basis of State of art manufacturing facility at Bhiwadi factory. With this, Skipper has entered into the frontier of Extra High Voltage Power Transformers manufacturing.
Skipper successfully commissioned its First 220kv GIS Substation of JICA HVPNL Project
SkipperSeil Limited was awarded greenfield EPC project of 220/66kV, 2x160MVA GIS substation by HVPNL in Sector 33, Gurugram, Haryana. Substation has been successfully commissioned right on 27th May 2017 Coinciding with Skipper’s annual day celebrations. It has 5 bays of 220kV and 9 bays of 66kV along with 2X160MVA, 220/66kV Power Transformers. The newly built 220kv Grid substation will increase the transmission capacity in Gurgaon city and will ensure uninterrupted power supply to the consumers.
Gas Insulated Substation (GIS) compared to the Air Insulated one’s gives the advantage of housing the entire substation equipment indoor, which eases the task of regular inspection, repair and maintenance. Another big advantage is space saving & its easy compatibility with the Supervisory Control And Data Acquisition (SCADA) for monitoring, control and data communication.
We heartily congratulate Mr. Praveen Gupta (President EPC- India) the project leader Mr. Ankit Kaushik and entire project team from Skipper for their dedication and hard work round the clock to ensure successful & timely commissioning.
Our Special and sincere thanks to Officials of HVPNL for their guidance and mentoring, especially Mr. Ajmer Gill (Director), Mr. S.K. Bansal (CE-MM), Mr. H.C. Gupta(CF-TS), Mr. R.N. Mishra (Ex-Engr-M&P), Mr. N.K. Sharma (SE-M&P), Mr. Anil Yadav (SE-TS), Mr. R.P. Sharma (Ex-Engr-TS) and other officials, Erection/Testing contractor and Sieyuan team for their sincere efforts to make it happen on time.
Skipper is pleased to announce the successful completion of World-Bank funded Project for GEDAP, Ghana. The contract scope was to Design, Manufacture Supply, Installation, testing and commissioning of equipment, expansion and reinforcement of existing eleven nos. ECG Primary substations in the Greater Accra, Ashanti and Western Regions of Ghana.
Substation upgrade works at Dansoman, Ofankor, Ashiaman, Kumasi-Airport (C)
Kumasi-KNUST (F), Kumasi-Neoplan (D), Daboase and Inchaban have been successfully completed by Skipper as per the scope of contract.
We would like to thank Skipper project team for successful handing over to the owner M/s ECG to their full satisfaction.
Skipper is always committed to serve its customers by meeting the stated as well as implied standards for the products and providing them with solutions exceeding their satisfaction levels. In our bid to provide high quality and reliable products, our product designs are continuously optimized and validated through various routine, special and type tests.
Skipper after all manufacturing operations, conducted all routine tests on a 33 MVA, 161/11.5 kV EHV Transformer.
To verify and validate its Design, to withstand Lighting Impulse voltages and Mechanical forces resulting from Short circuit faults, Skipper sent the Transformer to CPRI Bhopal, a well reputed, NABL accredited independent laboratory for the following tests:
• Lighting Impulse Test
• Dynamic short circuit Tests
The above tests were conducted from 8th-11th June, 2015 as per IEC 60076 P 3, by applying Lighting and Chopped wave shots to all HV and LV terminals including the Neutral Short circuit shots were applied to each of the HV terminal while LV terminals were shorted. The test was witnessed by our valued client M/s GRIDCo, a Power Transmission Company of Republic of Ghana. These tests proved that Design and manufacturing was robust to withstand above test application at CPRI.
IEC standard specifies Lightning and Chopped wave Tests at different voltage levels depending upon safety and reliability requirement of the installation. However, this transformer was subjected to the highest among the choice of test levels specified by IEC standard for the voltage class of Transformers.
Earlier, Skipper type-tested its 60MVA, 132/33kV Power transformer at CPRI by conducting Lighting Impulse and Short Circuit Tests.
With these tests the capability of transformer to withstand high stresses due to Lightning Impulse and Dynamic Short circuit forces over the long periods (in excess of 30 years) of service is ensured.
Skipper successfully completed a substation automation project for Western Railways’ Churchgate-Borivali’ section in the mega city of Mumbai, India. The project initiated in October 2014 is slated to bring about immense operational improvement in the existing suburban railway infrastructure of the City, often referred to as the busiest rapid transit system in the world with a traffic of more than 7.5Mn commuters daily.
Skipper’s mandate for the project was to fully automate the existing manually controlled substations using SCADA panels. Skipper’s supplied star-rated SCADA panels are specially designed to meet the special requirements of the area such as 6-8 lines, meet space constraints, parallel operation of 2 to 3 TSS and small sub-sectors. The old breakers were replaced with world class 3.3kV RDSO/CORE approved circuit breakers. The entire civil work at the site was completed by Skipper as well.
Within the last 8 months, 5 substations have already been commissioned and are working satisfactorily at the stations of Marine Lines, Churchgate, Elphinstone Road, Kandivali and Borivali. The project will be completely handed over to Western Railways by the end of this month with work completion for the 3 stations of Bandra, Grant Road and Jogeshwari.
Skipper proudly announces the successful commissioning of 1 X15 MVA substation of LOT 4 Project Management Unit (PMU) in Mararaba, Nigeria. This World-Bank funded project for Transmission Commission of Nigeria (TCN) will enhance the power requirements of Mararaba town and nearby areas and ensure increased power availability and fewer power cuts for residents.
Project Details are as follows:
Total No. of Feeders : 4
HT – 12.7 km
LT – 57.5 km
500kVA Transformer – 42 nos.
Project Value: On- Shore: 193.199 NMN, Off -Shore: 3.273 MUSD
We congratulate Mr. R. Sanjeev Kumar (Project Head), Mr. Hardip (Testing & Commissioning Expert), Mr. Mani Kankan Prabhu (Project Engineer) and other members of the LOT 4 team to complete this landmark project in 9 months. We also take the opportunity to congratulate Mr. B. Srinivas, COO – Skipper Nigeria and Mr. Praveen Gupta, Head – Commercial who mentored the project team team as well as the SCM, Accounts and Admin teams in Nigeria who made the timely delivery of this project possible.
Skipper manufactures the entire range of products required in a HV substation namely: Transformers, Circuit breakers, CTs, PTs, Isolators and HT and LT Control and Relay Panels.
We also manufacture special duty products namely:
Rectifier Transformers, Furnace transformers, Earthing transformer and distribution transformer using CRGO steel or Amorphous steel.
All products are, at present, meant for LV and HV applications. A newly-built, modern plant is under construction at Bhiwadi India for manufacture of products in Extra High voltage classes, on a plot of Land measuring 40,000 sq. m.
Manufacture and Type Testing of Power Transformer
Skipper secured an order for a turnkey project at Gurada in Nigeria. Supply, erection and commissioning of 2 Nos. 60 MVA transformers as per specifications given hereunder was included in the awarded contract.
Rating : 40/50/60 MVA
Cooling : ONAN/ONAF/ONAF, Vector Group :
Voltage Ratio : 132/34.5 kV
Taps : on HV for Variation of HV Voltage
The application of the transformer is to evacuate power from a gas/hydro generating station for local distribution load at 33kV which calls for a very sturdy and reliable design of transformer. The client expectation was to supply the product duly type-tested for a high fault current capacity with a high operating reliability.
Important aspects of Design
The design has to provide for
• adequate dielectric strength,
• adequate SC strength, and
• adequate thermal ability,
• taking into consideration challenges imposed by local & climactic conditions (temperature, humidity etc.)
Most common arrangement and type of coils
The arrangement of coils most commonly employed for this specification of design is :
• LV (double disc type) as innermost coil concentric with limb
• HV (interleaved / partially interleaved type), 2 coils in parallel with main lead at the centre
• Regulating (discs type), 2 coils in parallel, placed outermost
Main lead take-out poses some threats to dielectric design. Also the SC strength suffers due to axial gap in regulating winding.
Skipper’s Choice of Position of Regulating Winding
We chose the following coil positions :
LV : Double disc type as innermost coil concentric with limb
Regulating : Multi-start spiral concentrically placed between LV and HV
HV (interleaved), 2 coils in parallel with main lead in centre
No other factor influences the overall strength of transformer as much as the choice of position of the regulating winding viz. a viz. HV and LV windings.
The multi-start regulating winding placed concentrically between LV and HV offers the best dielectric and the highest SC strength. However, since this winding is placed in high leakage field, it results in high eddy losses. This was taken care of through the use of CTC.
Design Verification/Review of Design : This was carried out as per plan.
Emphasis on QC : This was carried out religiously at all stages of production right from selection
Commitment to Set Goals
Executives staff and employees were fully committed to see by body during the all process of design and manufacture. There was no hesitation in stepping back to see if the process was carried out as planned.
Satisfaction of Achievement
When the unit passed all the Routine, Type and Special tests, the satisfaction of Skipperites surely surpassed any physical award. These transformers are successfully installed on site to the complete satisfaction of the client.