390 Theory - Power Supply and Distribution

What is the pantograph fitted with?

Auto-Dropping Device (ADD)

What happens if the pantograph isn’t lowered correctly?

Pan not housed light will illuminate

What pantograph is normally use when running the train?

The rear

How does the driver select the correct pantograph to use?

Pantograph Selection Switch

When can the front pantograph be used?

With Maintenance Control’s permission

Where is the bus line located?

It runs across the roof of the train

What does the Bus Line connect to?

Transformers and Pantograph via VCBs

What are the Bus Line’s VCBs and where are their isolation switch located?

VCB 2 - ISO switch in coach H

VCB 3 - ISO switch in coach U

If there is a fault what happens if VCB1 is tripped?

Power disconnects, protecting electrical equipment from OHL supply

What is APC? and what does it do?

Automatic Power Control

• A receiver fitted No.1 bogies on coach H & C

• Trips and resets VCB going through Neutral section

Pantograph selection procedure when immobilising the cab

• Set DRA

• Open doors

• Swap the pantographs over:

  • Pan down

  • Pan selection switch to FRONT

  • Pan up

• Logged out of TMS

• Remove key

• Pan selection switch to REAR

What does the Transformer Control Case manage?

Distribution of power from the transformer to the:

• Auxiliary converters for general power supply 

• Motors for power

Transformer oil normal temperature

50-70°C, Optimum Running

Transformer oil high temperature

• 85°C: (warning) 

• 105°C: Idle Mode - Electrical power removed from traction packs on this portion of the train. (Still powers Auxiliary Converters)

• 115°C: Defective - VCB opens removing all power to the transformer and its feeds.

What are your actions if a transformer overheats?

1 transformer overheats:

• Notch 3 power

• Allow up to 10 minutes for the transformer to cool down

If the transformer trips again:

• Notch 2 power

• Prevents the other Transformers overheating

What Transformer faults gives a TMS alert?

• High oil temperature

• Low oil level

• Excessive gas pressure (boiling oil)

• Loss of oil flow (pump failure)

Propulsion Cases

Controls power supply to the traction motors

Propulsion fault

• The system on the vehicle affected will shut down

• TMS screen alert

• Press the pan up reset button.

If unsuccessful after 3 attempts the Propulsion case will be locked out / self isolated.

Traction Motors

The traction motor connects to the axle gearbox via a cardan shaft

• 3 'Pan Up' resets will lock out a defective traction package and traction motors

• Each powered car has a Traction Cut-Out switch

• Only use switch under Maintenance Control instruction

• Switch required if evidence of oil leakage from the gearbox

Auxiliary Converters uses 400v AC output to operate what?

• Main Air Compressors (C, E, H)

• Air Conditioning (HVAC)

• Catering Equipment

• Battery Chargers

• Auxiliary Converter Cooling Fans

• Traction Cooling Fans

• Transformer Cooling Fans & Oil Pump

Aux Converter failure

1 converter fails:

• the auxiliary load will still be supported by the remaining healthy converters. 

2 converters fails:

• Initiates a load shed

• Power will be lost from the associated traction motors

Auxiliary Converters supplies 110v DC to power what?

• Battery charging

• The tilt system

• Train control circuits

The batteries supply power for

• Train start up duties

• Maintaining supplies when passing through neutral sections

• Maintaining emergency lighting and ventilation fans

• Running the auxiliary compressor to raise the pantograph

If overhead power is lost how long will the batteries provide power

90 minutes

If overhead power is lost and the train is to be stood for a long time your actions and why?

• Press the Pan Down Button

• To enable the train to go into degraded mode

What is degraded mode?

It allows the train to preserve the batteries

How long does degraded mode preserve the batteries

3 hrs

Fire detection system

If smoke is detected within the crew corridor behind drivers cab:

• Smoke alarm will sound,

• Smoke detection lamp will illuminate,

• TMS alert

If smoke is detected in the rear crew corridor:

• TMS alert

Your actions during Fire Detection system activation

• Press smoke detection lamp. (silence alarm)

• The lamp will remain illuminated whilst smoke is detected. 

When can the smoke detection isolation switch be operated?

• Not possible to silence the alarm

• No visible sign of smoke within the corridor

• Maintenance Control permission

Excessive heat detected

TMS alert with alarm

When can you do a trip and reset

• When authorised by Maintenance Control

• Once the Train Manager has informed the customers

What effects does Trip and Reset have on the train

• Loss of lighting throughout the train

• Vestibule doors will not open/close

• Toilet controls will not work (including doors on disabled toilets) 

• Once the trip and reset has been completed, all Passenger doors and Crew doors will close.

Trip and Reset procedure

• Doors closed & interlock illuminated

• Lower the pantograph

• Master switch to off

• Remove key

• Press the auxiliaries trip button for 5 seconds

• Wait for a minimum of 30 seconds

• Press the Auxiliaries set button for 5 seconds (Note all doors including crew doors will close at this point).

• If TASS is operational the master switch MUST be left in the 'OFF' position until TASS has completed its initial set up procedure. (shake & vac)

• TASS Health illuminates

• Insert key - energise desk

Speedometer integrity lights Left and Right are for

Left: Brake control computer

Right: Traction control computer

Sanders

Deploys sand for 10 seconds during WSP

PBC must be in brake position