1

Data Collection System
Collect energy data from vehicles

2

Machine room blower
Ensure ventilation and fresh air
circulation in power cabinets

3

AC/DC Metering
Measure consumed and
regenerated DC energy

4

Braking resistor
Dissipate the exceeding
electrodynamic braking power

5

Braking Resistor fan
Provide forced ventilation
to braking resistors

6

Main DC circuit breaker
Protect electrical equipment
from short-circuit damages

7

Isolating Earthing switch​
Ensure circuit isolation and
grounding for safe maintenance

8

Data Handling System​
Manage Energy Billing Data (CEBD)
files for the ground-based
Data Collection System (DCS)

9

Heater contactor​
Control heating resistors

10

Coach power supply contactor
Isolate coaches from the
primary power supply

11

Pre-charge contactor​
Control the circuit
capacitors pre-charge

12

Line contactor​
Isolate the railway vehicles
from the power supply

13

Pre-charge resistor
Limit the current
of pre-charge

14

Inverter Isolation​
Isolate a failed inverter
to guarantee service continuity

15

Damping resistor​
Damp the inductance voltage
and capacitor current

16

Discharge resistor​
Limit the current during
filters discharge

17

Damping resistor​
Damp the inductance voltage
and capacitor current

18

Isolating Earthing switch​
Ensure circuit isolation and
grounding for safe maintenance

19

Capacitor discharge contactor​
Discharge DC-link capacitors
via a parallel resistor

20

Motor Isolation Contactor​
Isolate the motor and
protect the inverter

21

Traction Converter fan
Dissipate traction converter power
losses through forced ventilation

22

Battery charger output contactor
Isolate auxiliary batteries
from its charger

23

Battery charger input contactor​
Isolate battery chargers from
the primary power supply

24

AUX output contactors
Isolate auxiliary loads
from the auxiliary inverter

25

AUX input contactor
Isolate auxiliary inverters
from the DC-link

26

Traction motor blower​
Dissipate traction motor power
losses through forced ventilation