08-01-2014, 06:02 AM
Electrical Services at Metro Station
A building management system shall be provided for control and monitoring of E&M services at Stations and Depots.
(a)The electrical power design shall comply with the relevant current International standards, local codes and statutory requirements.
(b)The E&M equipment shall be classified into the following categories:
(i) Essential equipment; and
(ii)non-essential equipment.
©Essential equipment shall comprise the following:
(i)those required to maintain the Rail System safety; and
(ii)operationally critical facilities.
(d)The electrical power system shall consist of TNS 415 V, 3-phase, 50 Hz, 4-wire low voltage power distribution system, commencing from incoming LV cables connecting to the LV terminals of the 33/0.415 kV transformers.
(e)Emergency backup supply shall be in the form of a UPS system and a Diesel Generator of adequate capacity at each Station. The LV power supply system shall include:
(i)MCC/LV switchboards / distribution boards and associated cabling;
(ii)all LV supply routes for designated services, systems and cable galleries / ways in the Stations;
(iii)normal lighting;
(iv)emergency lighting for Stations and approaches to Stations;
(v)automatic power factor correction system to appropriate power factor;
(vi)earthing and bonding system; and
(vii)lightning and surge protection system.
A power system analysis shall be provided to verify that all equipment chosen are rated for the voltage, current and fault duty to which they are exposed.
A building management system shall be provided for control and monitoring of E&M services at Stations and Depots.
(a)The electrical power design shall comply with the relevant current International standards, local codes and statutory requirements.
(b)The E&M equipment shall be classified into the following categories:
(i) Essential equipment; and
(ii)non-essential equipment.
©Essential equipment shall comprise the following:
(i)those required to maintain the Rail System safety; and
(ii)operationally critical facilities.
(d)The electrical power system shall consist of TNS 415 V, 3-phase, 50 Hz, 4-wire low voltage power distribution system, commencing from incoming LV cables connecting to the LV terminals of the 33/0.415 kV transformers.
(e)Emergency backup supply shall be in the form of a UPS system and a Diesel Generator of adequate capacity at each Station. The LV power supply system shall include:
(i)MCC/LV switchboards / distribution boards and associated cabling;
(ii)all LV supply routes for designated services, systems and cable galleries / ways in the Stations;
(iii)normal lighting;
(iv)emergency lighting for Stations and approaches to Stations;
(v)automatic power factor correction system to appropriate power factor;
(vi)earthing and bonding system; and
(vii)lightning and surge protection system.
A power system analysis shall be provided to verify that all equipment chosen are rated for the voltage, current and fault duty to which they are exposed.