Commissioning of all three new excitation systems for new hydro power plant – HPP Brežice, Slovenia
During September 2017., Končar – Electronics and Informatics engineers commissioned all three new static excitation system type SEB 11E with excitation transformer, for the generator 1, 2 & 3 (21.5 MVA) on HPP Brežice in Slovenia. The 45 MW HPP Brežice is the fifth in the chain of six hydroelectric power plants on the lower Sava River. The construction of HPP Brežice was launched in March 2014 and last month has started trial run. Excitation system is implemented in the dual-channel version with bridges in 1 + 1 configuration, which provides full redundancy of the system.
2017-10-07T12:33:47+00:00 October 7th, 2017|
Meet us on ELMIA 2017, 10 – 12 October 2017.
Meet us on Scandinavia’s main railway exhibition – Elmia Nordic Rail (Elmia 2017) which will be held in Jönköping, Sweden. It´s a fair for companies, organizations and individuals with a professional interest in the railway, directly or indirectly. Elmia is the industry´s most important meeting-place for customers, representatives and other stakeholders.
2017-10-06T17:07:28+00:00 October 6th, 2017|
Locomotive converter repairs
KONČAR – Electronics and Informatics has been refurbishing, repairing and testing the twenty diode rectifiers of the main drive and three converters of the auxiliary drives PJUT 135-D as part of the large and medium repair work of the seven diode locomotives of the 1141 series manufactured in the seventies and eighties of the last century.
The diode rectifiers are designed for supply of the traction motor of the locomotive with a DC voltage (885V, 1250A). In the process, the rectifiers are completely disassembled, cleaned in detail, mounting surfaces on semiconductor heat sinks are renewed, all electrical components are thoroughly tested and parts reassembled. The defective parts are replaced by new ones. The rectifiers have a specific construction that requires strict adherence to the procedure and order of the work. After assembly, complete check of the rectifier is performed.
The PJUT 135-D converter is a static converter that converts a 900V single phase voltage to 3x380V 135kW three-phase voltage and serves for supply of auxiliary locomotive drives (ventilation, compressor and other auxiliary drives).
The converters are also completely disassembled, their parts are cleaned in detail, electronic devices, modules and relays are separately tested, semiconductors, capacitors, resistors are tested on test devices and impregnation of transformers and reactors is renewed. After that all parts are mounted back into the converter and tested under full load.
The diode rectifiers and converters are ready for further long-term reliable locomotive operation after refurbishment, repair and testing.
2017-10-03T15:28:49+00:00 October 3rd, 2017|