1

Machine Room Blower
Ensure ventilation and fresh
air circulation in power cabinets

2

Braking Resistor
Dissipate the exceeding
electrodynamic braking power

3

Braking Resistor Fan
Provide forced ventilation
to braking resistors

4

Heater Contactor
Control heating resistors

5

Coach Power Supply Contactor
Isolate coaches from
the primary power supply

6

Diesel Engine Radiator Cooling Fan
Are high-volume, low-noise units
for large heat exchangers

7

Alternator-Rectifier Disconnector​​
Isolate alternators-rectifiers from DC-link

8

Precharge Resistor
Limit the current of precharge

9

Line Contactor
Isolate the railway
vehicles from the
power supply

10

Precharge Contactor
Control the circuit
capacitors precharge

11

Discharge Resistor
Limit the current
during filters discharge

12

Isolating Earthing Switch
Ensure circuit isolation and
grounding for safe maintenance

13

Motor Isolation Contactor
Isolate the motor and
protect the inverter

14

Traction Converter Fan
Dissipate traction converter
power losses through
forced ventilation

15

Traction Converter Fan
Dissipate traction converter
power losses through
forced ventilation

16

Battery Charger Output Contactor
Isolate auxiliary batteries from its charger

17

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

18

AUX Output Contactor
Isolate auxiliary loads
from the auxiliary inverter

19

AUX Input Contactor
Isolate auxiliary inverters
from the DC-link

20

Traction Motor Blower​
Dissipate traction motor
power losses through
forced ventilation