The Matola 275/66kV S/S project undertaken on behalf of Isolux (Spain) www.isolux.es represents the pinacle of our achievements thusfar. This project was a major undertaking in terms of commissioning of a major new installation and our achievements in finalising this plant and getting it ready for energising is a feat which we take great pride in.
The installation comprises 2 x 275kV feeders, 1 x 275kV Bus Coupler, 1 x 160MVA 275/66/33kV Power Transformer, 6 x 66kV overhead line feeders and a 66kV Bus Coupler as well as the AC and DC auxillary systems associated with an installation of this nature.
The technical complexity of this installation in terms of the protection and control systems employed and the faith shown in our technical competance to commission these systems is testament to our growing recognition in the international market.
The following details petain:
2 x overhead line feeder bays
1 x bus coupler
1 x 160MVA transformer feeder
Protection and Control
Main 1 = Siemens Siprotec 4 7SD610
Main 2 = Siemens Siprotec 4 7SA522
distance with teleprotection and
integral single pole ARC
Control: Siemens SICAM-SAS with
6MD66 Bay Unit
Siemens Siprotec 3 7UT513 transformer differential and REF
Siemens Siprotec 4 7SJ610 for HV,MV and LV Overcurrent E/F
Control: Siemens SICAM-SAS with 6MD66 Bay Unit
Bus-Bar ./ Circuit Breaker Failure Protection:
Siemens 7SS52 distributed system
6 x overhead line feeders
1 x bus coupler
2 x bus section
1 x transformer incommer
Main 1 = Siemens Siprotec 4 7SA522 distance with
teleprotection and integral ARC
Main 2 = Siemens Siprotec 4 7SA522 distance with
teleprotection and ARC
Control: Siemens SICAM-SAS with 6MD63 Bay Unit
Siemens Siprotec 4 7SJ1610
Complete functional testing of outdoor switchgear and interlocking including conventional remote controls and controls from the SICAM-SAS digital control system.
Current and voltage transformer tests: ratio, burden, mag curves, sec resistance, insulation resistance, primary injection to prove cabling and panel wiring.
Protection and Control systems: complete calibration and function tests of tripping functions, relay characteristics, functionality of operation, Auto Reclose systems etc.
Power Transformer: voltage ratio, tap changer operation, bucholz temperature and pressure protection
Test Equipment: we utilised an Omicron CPC 100 for most primary tests and an Omicron CMC 256 for all secondary tests