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doi:10.3850/978-981-08-6396-8_T3-04
Considerations in the Earthing Design of Power Socket Outlets in DC Electrified Rail Transit Tunnels
Chris Chan1, Regina Yip2, Matthew Ngan3, Melvyn Thong4, Malvin Ho5 and Kok Beng Yeo6
1Electrical Team Leader, Parsons Brinckerhoff (Asia), Hong Kong.
chan.ccl@pbworld.com
2Electrical Engineer, Parsons Brinckerhoff (Asia), Hong Kong.
yip.th@pbworld.com
3Deputy Project Manager, Parsons Brinckerhoff, Singapore.
ngan.matthew@pbowrld.com
4Deputy Director, Land Transport Authority, Singapore.
Melvyn_THONG@lta.gov.sg
5Assistant Manager, Land Transport Authority, Singapore.
Malvin_HO@lta.gov.sg
6Assistant Manager, Land Transport Authority, Singapore.
Kok_Beng_YEO@lta.gov.sg
ABSTRACT
This paper provides an overview of tunnel power socket outlet earthing arrangements in dc electrified rail transit tunnels. A study was carried out to identify the risks associated with different power socket outlet earthing arrangements under normal, single equipment failure and double equipment failure scenarios. In responding to the identified risks, various mitigation measures are proposed and their pros and cons in terms of costs, maintenance requirement, and proven services records are described.
Keywords: Tunnel power socket outlet, Earthing, Railway.
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