British Rail Network South East
Drive System
4 motored axles per driving car - totally enclosed, frame mounted, 3 phase induction motors. 2 off GTO inverters per driving car (1 per bogie), blended regenerative/rheostatic braking with facility to blend with the air brake system.
Electrical Supplies
110 V DC control.
750 V DC nominal third rail/running rail return (operating limits - 400/900
V).
2500A line current limit.
Cooling
Main equipment case - forced air using 2 x 3 phase/415 V blowers.
Brake resistor - DC blower tapped off resistor.
Semiconductor heat extraction - phase change cooler (closed circuit using fluorocarbon
refrigerant).
Inverter Rating
600A rms continuous.
Train Weight
135 tonnes (tare)
Braking Effort (Dynamic)
121 kN
Tractive Effort
158 kN
Asynchronous induction motor with squirrel cage rotor has:-
Simple and robust rotor
No commutator or brushgear to maintain
No risk of flashover
Totally enclosed
High power weight ratio
Blended regenerative/rheostatic braking
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