Electrical equipment for traction substations are intended to supply with electrical power the contact network
for trams/trolley buses (driven by DC motors) intended for passenger transport.
The main characteristics of the substations their numbers
and the distance between them are determined depending on passenger traffic frequency, rolling stock characteristics, traffic speed and runway linearity.
The contact network is supplied with a voltage of 600 or 825 VDC acquired from rectifiers with power semiconductors supplied from medium voltage network (6÷20kV).
SUPPLY OF GOODS STRUCTURE
Electrical equipment for urban substation represent a complex supply of goods of electrotechnical products being made up of:
6; 10; 20kV medium voltage supply switchgears;
three-phase dry or oil power transformers rated 1500kVA or 2300kVA;
silicon diode rheostats rated 1600 A or 2500A;
DC distribution cubicles (positive bar and negative bar);
switchgears for auxiliary services;
three-phase transformer for auxiliary services rated 40 - 100 kVA;
centralised control post type PCC;
assembling elements (current paths, insulators, assembling means, etc.);
carriage to transport DC ultra-high speed circuit breaker;
rectifiers 24 VDC, 20A and an accumulator battery 24 V, 70Ah optional delivery;
