Description
Although specified as a dual voltage unit, Class 365s have never operated with this capability since they were built with only one system of traction current pick up. Units 365501 to 365516 which went to Connex South Eastern, were originally supplied only with DC shoe gear for use on the 750 volt third rail system (with the exception of unit 365502 which ran briefly on the AC network during testing and commissioning and was the main reason for this unit being chosen as the one sub leased from Connex South Eastern to WAGN to bolster unit availability in the aftermath of the Potters Bar Crash in 2002). In this configuration the maximum speed was 90 mph (145 km/h).
When they transferred to West Anglia Great Northern for use with 25 kV AC overhead line traction supply, the shoes and associated equipment were removed and a Brecknell Willis high speed pantograph was installed, along with other operator and voltage specific modifications and testing, by Bombardier Transportation Limited at their Doncaster Works, shortly before the works were closed.
However the 365s retain the original 750 volt DC bus, meaning that when on 25 kV overhead lines the current is collected as AC, rectified to DC for the onboard systems, and then inverted back to AC for the 3-phase traction motors. For running on overhead lines the maximum speed was raised to 100 mph (161 km/h).
Basic equipment consists of;
- DMOC A - 4x 3-phase AC traction motors, traction inverter, sander
- TOSL - Compressor, auxiliary converter, disabled toilet
- PTOSL - Pantograph, transformer, auxiliary converter, small toilet
- DMOC B - 4x 3-phase AC traction motors, traction invertor, sander
Dynamic (rheostatic) braking on the two Driving Motor coaches is available in addition to disc brakes, via a system of brake blending.
In common with the whole Networker fleet, Wheel Slide Protection (WSP) operates on every axle. Under braking conditions a blowdown valve releases air from the brake cylinder of any axle if the rotational speed varies significantly from the average axle speed on the train.
Internal LED Passenger Information Display Systems (PIDS) and Auto-Announcers are fitted across the entire fleet.
Read more about this topic: British Rail Class 365
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