Medium repair of static converters VIS 50-1 and VIS 60-1
KONČAR – Electronics and Informatics Inc. signed a contract with HŽ-Passenger Transport, Inc. for medium repair services of static converters type VIS 50-1 and VIS 60-1 that includes disassembling, medium repair works, installation and testing of 24 static converters on passenger cars.
The medium repair works of static converters include disassembling of sub-assembling sets, electronic modules and main components from the converter cubicle, thorough cleaning, washing and painting of the cubicle, checking the functionality of all circuits and electronic modules, replacement of defective and used-up parts, re-mounting the converter and its functional control at the factory and on the passenger car. This preventive
maintenance of the converter enables reliable operation of static converters that significantly contributes to the carriage availability of passenger cars on domestic and international lines. Contracted medium repairs will be carried out periodically, 3 to 4 static converters per month.
The medium repair works on four static converters were completed in May and June. In the meanwhile, those converters were tested on passenger cars. When checking the quality, representatives of HŽ-Passenger Transport were extremely satisfied with the performed service and it is expected that the medium repairs of the static converters will continue in the next years.
Reconstruction of medium voltage transformer station 35/10 kV Dugi Otok
KONČAR Electronics and Informatics Inc. completed reconstruction of medium voltage transformer station for Croatian DSO (Distribution System Operator). It is TS 35/10 kV Dugi Otok, located on central part of Dugi Otok island.
Due the increase of station capacity and expanding with additional 4MVA transformer, new bays are added and equipped with protection and control terminals (relays). In addition all other protection devices are upgraded and changed.
All new devices are KONČAR protection relays of KONPRO series: RFX633 and RFD633. KONČAR Electronics and Informatics Inc. also provided new AC power supply system. Communication between relays is done using IEC 61850 protocol.
After installation, all equipment is successfully tested together with remote control from DSO dispatching centre in Zadar.
Reconstruction of auxiliary power supply system in SS Konjsko
KONČAR – Electronics and Informatics Inc. has contracted with the company Croatian Transmission System Operator Ltd. Split the reconstruction of the auxiliary DC power supply system 220 V at substation 400/220/110/10 kV Konjsko. The contract encompasses the production of equipment, factory testing, and installation in the object, cable laying, on-site testing, commissioning and delivery of the final design documentation.
SS Konjsko was built in 1983 and represents the largest power facility of transmission network in Dalmatia that enables the electricity transmission from Hydro power plants Zakučac, Orlovac, Ðale and reversible hydro power plant Velebit to SS Mostar and Bilice and Switchyard Brinje. Over the last 35 years, the substation has undergone a number of changes of primary and secondary equipment that have greatly influenced the DC voltage supply system. Additionally, the existing systems are outdated today, therefore, the only possible solution were comprehensive redesign and reconstruction.
As the substation is extremely important for the Croatian transmission system, all installed auxiliary DC power supply systems must have the highest level of reliability because they provide supply for all vital equipment.
The needed high level of reliability and availability of power supply is achieved through an appropriate power supply concept. A double power supply system with modular thyristor rectifiers that operate in redundant parallel connection according to the principle n + 1, is foreseen. Each system has its own battery and main distribution board. Sub distributions are deployed in relay houses and each will be powered double-sidedly, independently from both DC sources.
The final factory system testing was carried out in the presence of purchaser’s representatives on end of February 2018, and the equipment delivery and works on the facility are planned for the April.
2018-04-16T10:48:58+00:00 April 16th, 2018|