Mechanical

Question 1

M1 (AMP) car roof is fitted with…

Answer 1

1. Pantograph Assembly, which includes :
   -Two surge arrestors
   -Energy meter
   -Vacuum Circuit Breaker (VCB)
2. Two Saloon HVAC units
3. Drivers cab HVAC unit
4. Antenna (VHF and 3G data)

Question 2

The M1 (AMP) car underframe is fitted with…

Answer 2

• Main Transformer for the entire consist
• Traction Converter (this car’s traction motors only)
• Balise reader
• Air Compressor
• Car Brake Control Panel (BCP)
• Pantograph raising module (for manual raising if required)
• 4 airbag suspension air reservoirs
• 2 airhorns
• Recovery coupler adapters
• Flange lubricating unit (not on all models)
• Auxilliary Brake Control Panel

Question 3

The T-Car (AMT) roof is fitted with…

Answer 3

• Two saloon HVAC units
• Antenna

Question 4

T-Car (AMT) underframe is fitted with…

Answer 4

• Two 110V batteries
• Two external battery charging sockets
• Four airbag suspension air reservoirs
• Air brake reservoir
• Main reservoir
• Car Brake Control Panel

Question 5

The M2 (AMA) car roof is fitted with…

Answer 5

• Two saloon HVAC units
• Operator’s Cab HVAC unit
• Antenna

Question 6

The M2 (AMA) car underframe is fitted with…

Answer 6

• Two Auxilliary Power Converters
• Traction converter for this car’s traction motors only
• Balise reader
• Air compressor
• Car Brake Control Panel
• Four Airbag suspension air reservoirs
• Air brake air reservoir
• Two air horns
• Flange lubricating unit (operates on leading bogie only)
• Auxilliary Brake Control Panel

Question 7

Motor Bogies (AMP & AMA units)

Answer 7

Motor bogies are fitted with:
- Traction motors, and
- Air brake assembly (2 per bogie, diagonally opposite each other)
- Primary suspension assembly
- Secondary suspension (airbags) assembly
- Park brakes fitted to each air brake assembly

Question 8

T-Car Bogie

Answer 8

T-car bogies are fitted with:
- Trailer wheel set assembly
- Primary suspension assembly
- Secondary suspension assembly (air bag)
- Air brake assembly (one per wheel)

Note: No traction motors or park brakes on t-car bogies.

Question 9

Flange Lubrication

Answer 9

Reduces wear on the wheels and track on tight curves and will also decrease wheel squeal.

Question 10

Defective headlights/ ditch lights

Answer 10

In a depot:
• If a failure occurs prior to entering service, another unit will be taken if available
• If the unit can not be replaced, the defect must be repaired by depot personnel before the unit is released for service.

Question 11

Voltage EMU can operate is…

Answer 11

Between 19,000v & 27,500v

Question 12

Vacuum Circuit Breaker

Answer 12

Used as an in-line circuit breaker to open and close the power circuit.

Question 13

Main Transformer (on M1 car)

Answer 13

The Main Transformer receives 25,000 VAC at up to 74 amps from the overhead line and transforms it to:
- 1000 VAC at 4 x 400 amp supply to the Traction Converters on the M1 & M2 cars.
- 429 VAC at 2 x 291 amp feeds to the Auxilliary Power Converters (APS) 1 & 2 on the M2 car.

Question 14

Auxilliary Power Converters (APS) (on M2 car)

Answer 14

• Located under the M2 car
• Convert one of the Main Transformer outputs to supply 400VAC Hotel supply & 110VDC for the DC systems

APS1: Supplies the power requirements of the M1 car and half of the T-car and one battery charger
APS2: Supplies the M2 car, the remaining half of the T-car and the other battery charger

Question 15

Air Systems on EMU

Answer 15

• Friction service brakes
• Emergency brakes
• Secondary airbag suspension
• Operator’s cab service horns, and
• Pantograph raising mechanisms