Tender Details
Cancellation of the Enquiry for the Ratification Works and Repairs of Vandalised and Stolen Overhead Track Equipment, Signalling and Traction Substations for Majuba Rail Project
Tender Number:
Cancellation - MPMAJ10041PS
Client:
Eskom
Region:
Mpumalanga
Industry:
Other
Title:
Cancellation of the Enquiry for the Ratification Works and Repairs of Vandalised and Stolen Overhead Track Equipment, Signalling and Traction Substations for Majuba Rail Project
Closing Date:
26/05/2022 14:06
Site Inspection Date:
N/A
Tender Description:
Office Location Majuba Rail Office/ Old Bergvliet MineAmersfoort ,Volkrust Mpumalanga Email Address Mabasoh@eskom.co.za Scope Details Ratification Works and Repairs of Vandalised and Stolen Overhead Track Equipment, Signalling and Traction Substations for Majuba Rail Project The ratification works scope includes signalling equipment which are supplied with power from the transmission line circuit (OHTE). Given that relay rooms are the heart of a railway’s signalling system, which Transnet’s Central Train Control relies on to control and monitor all traffic on the line. Since, the relay rooms are supplied with power from the transmission line circuit these faults thus negatively affected the relay rooms as they experienced continuous power interruptions. This meant, CTC could not comfortably and reliably see trains moving on the section. Due to the severe safety hazard this posed, a decision was taken to shut–down the line until issues with this transmission line circuit were resolved. Additional challenges were experienced pertaining to the tele–control systems at some of the substations. When testing the tele–control systems it was observed that CTC could not remotely operate some of the substation’s critical safety equipment. Such equipment involves main substation circuit breakers, motor–operated devices (MODs) and motor–operated track switches (MOTS), monitoring of substation health etc. This again presented another safety risk and further contributed to the decision of shutting–down. The works include but are not limited to Overhead Track Equipment (OHTE) and Transmission line – Part 1 • This works covers the repairs of any vandalised 3 kV DC network and 25 kV AC network overhead track equipment as well as an 11kV AC transmission line on the same support structures which carry the 3kV DC and 25kV AC OHTE. • The works include repairs of the 11 kV AC overhead transmission line as a result of theft and the rectification of any design detects that could have contributed to the unsuccessful commissioning of the 11 kV AC circuit experienced in previous commissioning attempts. 3kV DC & 25 kV AC Traction Substations This works covers the repairs, testing, commissioning, and hand over of the following traction substations • RLRA traction substation (km 3.6). • Uitgezocht 88/25kV AC Single Unit Traction Substation (km 6.070). • Stimela 88/25kV AC Single Unit Traction Substation (km 28.910) • Grabesrust 88/25kV AC Double Unit Traction Substation (km 38.000) • Koppieskraal 88/25k AC Double Unit Traction Substation (km 58.850) • Nieuw Gevonden 88/3kV DC Single Unit Traction Substation (km 65.900) • Nieuw Gevonden 88/11kV AC Signal Supply Distribution Substation (km 65.900) • Nieuw Gevonden 88/3kV DC Single Unit Traction Substation (km 65.900) Signalling This works covers the investigations, repairs, testing, commissioning and hand over of the following signalling equipment present on the line • Condition Assessment System • Colour light Signalling • Telecommunication • Telecontrol systems. Tender box address No.10 Smuts Avenue Witbank / Emalahleni Mpumalanga Description Cancellation of the Enquiry for the Ratification Works and Repairs of Vandalised and Stolen Overhead Track Equipment, Signalling and Traction Substations for Majuba Rail Project Summary Cancellation of the Enquiry for the Ratification Works and Repairs of Vandalised and Stolen Overhead Track Equipment, Signalling and Traction Substations for Majuba Rail Project