1

Line Contactor
Isolate the railway vehicles
from the power supply

2

Precharge Contactor
Control the circuit
capacitors pre-charge

3

Inverter isolation
Isolate a failed inverter to
guarantee service continuity

4

Capacitor Discharge Contactor​
Discharge DC-link capacitors
via a parallel resistor

5

Precharge Resistor
Limit the current of pre-charge

6

Discharge Resistor
Limit the current during
filters discharge

7

Damping Resistor​
Damp the inductance voltage
and capacitor current

8

Traction Converter Fan
Dissipate traction converter power
losses through forced ventilation

9

Motor Isolation Contactor​
Isolate the motor and
protect the inverter

10

Braking Resistor​
Dissipate the exceeding
electrodynamic braking power

11

Main Dc Circuit Breaker​
Protect electrical equipment
from short-circuit damages

12

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

13

Inverter Isolation
Isolate a failed inverter to
guarantee service continuity

14

AUX Input Contactor​
Isolate auxiliary inverters
from the DC-link

15

AUX Output Contactor
Isolate auxiliary loads
from the auxiliary inverter

16

Battery Charger Input Contactor​
Isolate battery chargers from
the primary power supply

17

Battery Charger Output Contactor​
Isolate auxiliary batteries from its charger