Contracting palette of the Substation Business Management

•    Construction of high- and medium-voltage substations
•    Performance of partial works of substation construction: design work, architectural construction, electrical technological installation and commissioning activity
•    Reconstruction, extension of substations, replacement of primary and secondary devices
•    Design, construction and commissioning of the electrical equipment of power plants
•    Maintenance, trouble-shooting at substations and in power plants
•    Diagnostics (transformers, primary devices, protection and control engineering equipment etc.)

•    Complete installation of electrical technological cabinets, manufacturing of distribution devices.

Construction of high- and medium-voltage substations

The Substation Business Management of OVIT is able and ready – on the basis of the high-level preparedness and well-founded market knowledge of its specialists – to completely implement in green field, in main contracting framework high- and medium-voltage substations, from the design work to commissioning. During this business project it makes an advantageous use of its ancillary and supplementary capacities developed consciously and expediently in the course of time (transportation, manufacturing, telecommunication, specialised services). Complying with the demands of the clients, it ensures the procurement, installation, commissioning, maintenance and trouble-shooting of the most up-to-date equipment, electrical devices to be found on an international level.

Accomplishment of substation construction partial works

Planning

The basic task of the substation planning is to provide designs necessary for the construction works for the building and fitting activity. This activity is performed by the Department of Substation Design and Technology of the Substation Business Management.
The majority of the works covers designing services for the construction, extension and maintenance in the area of the transmission network, the high- and medium-voltage distribution network. The major special planning areas can be divided to the professional fields of: architecture, primary, secondary, within this latter the protection, control engineering, telecommunication, account metering, installation and property protection.
The planning division prepares the schematic, construction, product and as-built designs with the newest computer design software in the form of technical descriptions, layout plans, current path and installation blueprints, schedules of materials and lists.

Substation architecture

The construction activity of OVIT is one of the important services of the company, dynamically developing from the beginnings of the 90s. As an organic part of its contracting palette, the Power Transmission Network Directorate is able to implement all the civil engineering, foundation, reinforced concrete installation, master building and craft works from the geodesic works to the technical handover. It is the main contractor of turnkey, green-field investment projects, but undertakes to perform partial activities as well.
The construction works of the OVIT accomplished and being just in progress are in a considerable part constructions, renewals, extensions associated with the national high-voltage transmission and/or main distribution network, but it makes use of its capacities in the framework of other assignments as well (e.g. MÁV projects). The construction activity of OVIT is built on the available, highly qualified staff of specialists and on the fleet of up-to-date prime movers, devices and tools, as well as on the knowledge base of several decades.

Electrical technological installation

The Power Transmission Network Directoratet of OVIT ZRt. is able to perform – as a part of its substation construction strategy activity – all the work phases in the electrical technological installation of the high-voltage substations, such as the installation of different distribution, protection and control engineering cabinets, primary and secondary equipment, cabling of devices, installation of primary devices and transformers. In this professional field it has undertaken to perform complete or partial activities with much practice for a long time.

Special service providing and commissioning activity

As a part of its complex activity in substation construction, the Central Specialist Services Plant performs the assembly and configuration of the protection and control engineering systems, the on-site commissioning of primary and secondary equipment meeting the special demands of the clients from the preparation of offer through the design work to commissioning. The specialists well-versed in the secondary engineering of the Substation Business Management feel at home not only at the power transmission network stations of the Hungarian electric energy system, but also in the area of the different power suppliers, railway traction substations, power plants and industrial plants, where in the course of the commissioning operations they have proved their preparedness and expertise in innumerable cases.

Reconstruction, extension of substations, replacement of devices

The foolproof operation of the high-voltage transmission and main distribution network stations built decades ago requires the replacement of the high-voltage devices (primary reconstruction) with up-to-date reliable devices, the secondary reconstruction as it is termed, in the course of which the substation protection and control engineering system must be revamped.
As a contractor, the OVIT ZRt. performs with serious expertise and great accuracy the reconstruction of the working substations and the various industrial facilities, during which the individual phases of the reconstruction have to be implemented generally by a very close deadline and commissioned in accordance with the disconnection plan.

Design, construction, commissioning of the electrical equipment of power plants

The Substation Business Management performs continuously – with the efficient and coordinated participation of the associate plants (Power Plant and Maintenance Directorate) – in power plant environment complete electrical and mechanical design, construction and maintenance tasks. This activity covers starting from the high-voltage de-supply of power plants the installation, commissioning and maintenance of the various low-voltage devices, for example turbine controllers, fire protection systems, motors, pumps, control engineering PLCs and other low-current equipment.
Our main clients: Paks Nuclear Power Plant Zrt., MVM GTER Zrt., Tatabánya Heating Power Station Kft., Miskolc Heating Power Station Kft. etc.

Maintenance, trouble-shooting in substations and power plants

The Substation Business Management of OVIT ZRt. performs – besides the construction of substations – considerable maintenance services on the high-voltage transmission network, on the main distribution network of power supply companies, in power plants and major industrial plants.
The regional substation construction plants have a significant staff a specialists, devices, machines and measuring instruments for the high-level performance of the maintenance tasks covering the substation devices, which are associated with continuous teaching and training activity.
During the maintenance of the conventional devices the substation specialists of OVIT use up-to-date measuring and diagnosing equipment, hereby the time spent on maintenance becomes considerably shorter.
From the diagnostic tests of the up-to-date "maintenance-free" devices the operator can determine a maintenance conforming to the condition of the devices. The maintenance depending on the condition is accomplished by our specialists possessing much experience by means of high technical level diagnostic device stock, maintenance software (for storing the data).

Maintenance services of the Substation Business Management:

• Maintenance, diagnostic testing of High/High, High/Medium-voltage, HKV, auxiliary transformers and regulators
• Handling, conditioning the oil of transformers
• Diagnostics and maintenance of high- and medium-voltage substation devices (breakers, isolators, measurement converters)
• Maintenance of high- and medium-voltage SF6 gas- and air-insulated armour-clad equipment
• Maintenance of medium-voltage built devices with cells
• Renewal, revision in workshop of high-voltage devices (breakers, isolators)
• Replacement of isolating drives and insulators
• Maintenance of secondary systems (protection and control engineering etc.)
In respect of the transmission and main distribution network the OVIT ZRt. operates an incomparably efficient, complex inspection duty system. As a part of this, our regionally organised working groups can start practically at once - in any area of the country in consideration of the time of travelling, the localisation of the fault, putting the site at disposal and the survey of the fault.
After the quick evaluation of the on-site data the experts make proposals without delay for the repair methods to be applied, for the materials and technologies.
The specialists performing the implementation start the restoration at once by relying on a special warehouse base and fleet of devices (special high-duty working machines, provisory columns, standby devices etc.) – with design, technology site management, if needed.

Diagnostics

The complex knowledge of the condition of the electrical equipment shall be a precondition for its economical and foolproof operation.

The electrical diagnostics if advantageous, because it ensures the up-to-day knowledge of the condition, the early recognition of the potential failure, the capability of preventing the losses due to operating troubles, the ability to plan the intervention necessary, but sufficient at the same time, that is of the condition-dependent maintenance, ensuing from this the possibility of operation at cost minimum.

Our colleagues participate on international level in the development of the most recent diagnostic methods and in the introduction of their practical application; due to the CIGRÉ membership and relation.

Our diagnostic services:

–    Insulating oil test, HGA – accredited service

–    Heat mapping – accredited service

–    Measuring transformer calibration – a service common with the Hungarian Commercial Licensing Office

–    High-voltage measurements

–    Electricity consumption metering

–    Maintenance and diagnostic activity of transformers

–    Complex diagnostics, preparation of expert opinion

Contact information:

Telephone: (+36 1) 414-3181

Fax: (+36 1) 415- 5853

 
Preliminary installation of electrical technological cabinets, manufacturing of distribution equipment

The specialists of the Substation Business Management of OVIT have a great experience in the installation, maintenance and repair of the high-voltage substations. The optimal selection of the built-in devices and equipment means a guarantee at all times for the reliability and quality of the OVIT's activity.

The OVIT ZRt. began in 1998 – as a result of several years' development work – the serial production of up-to-date low-voltage auxiliary equipment as well. The preliminary installation and quality inspection of the protection and control engineering cabinets of the alternating and direct current low-voltage switching and distribution devices meeting the demands of today are carried on in the the Central Substation Construction Plant on the basis of the plans of the Department of Substation Design and Technology. All the complete units possess MEEI type testing certificate dated 31. 12. 1997.

Contact address:

Substation Business Management

1158 Budapest, Körvasút sor 105

Telephone: (+36 1) 414 3404

Fax: (+36 1) 415 5832