Standardised voltages
| Electrification system | Voltage | |
|---|---|---|
| Min. non-permanent | Max. permanent | |
| 750 V DC | 500 V | 900 V |
| 1,500 V DC | 1,000 V | 1,800 V |
| 3 kV DC | 2 kV | 3.6 kV |
What is the voltage of electric traction system?
At traction substation 220/132 kV is step down to 25 kV through single phase transformer. The 25 kV AC voltage is drawn as single phase system from a three phase systems.
What is the voltage of electric motor in train?
Electric-traction systems can be broadly divided into those using alternating current and those using direct current. With direct current, the most popular line voltages for overhead wire supply systems have been 1,500 and 3,000. Third-rail systems are predominantly in the 600–750-volt range.
What is the operating voltage of a locomotive?
The overhead power supply used for electrical trains in India typically operates at a voltage of 25 kilovolts (kV) and a frequency of 50 hertz (Hz). This system is known as the 25 kV AC (alternating current) overhead electrification system and is used for both suburban and long-distance trains in India.
Is electric train motor AC or DC?
DC motors are used on trains is because of their high torque and good speed control. Compared to AC motors, DC motors can provide industry applications with a fine balance of strong starting torque and controllable speed for seamless yet precise performance.
Are locomotives AC or DC?
DC motors are used on trains is because of their high torque and good speed control. Compared to AC motors, DC motors can provide industry applications with a fine balance of strong starting torque and controllable speed for seamless yet precise performance.
What is the voltage of electric railway?
What power output is typical for electric railway locomotive?
Power range starts from 1000 kW for shunters and may go up to 9 MW for heavy freight locomotives. Locomotives have 6–8 HVAC or HVDC traction motors rated at 500 V DC minimum or 1000 V AC minimum. These motors are fed through various converters designed for that particular traction system.
Which type of power supply is used in electric traction?
25 kV, AC, 50 Hz single phase power supply for electric traction is derived from the grid of State Electricity Boards through traction sub-stations located along the route of the electrified sections at distance of 35 to 50 km apart.
Why do electric trains use DC?
DC will consume less energy when operating under service conditions. The equipment in the system will cost less to build and there is no need to produce the conversion technology to ensure that the train can run on AC power.
How much power does an electric train use?
The amount of electricity used to travel 1 km varies constantly and depends on many factors. At maximum acceleration at high speed it consumes 19.6 MW. Traction control limits the power at lower speeds so this amount of power can only be applied at high speed.
Where do electric trains get power?
Electrification through overhead linesOverhead lines, also known as overhead catenary systems, utilise a network of wires suspended above the tracks to supply electric power to trains. The system operates on alternating current (AC) and is widely used in mainline and high-speed railway networks.
What is the voltage of railway electric line AC or DC?
Railway electrification systems using alternating current (AC) at 25 kilovolts (kV) are used worldwide, especially for high-speed rail. It is usually supplied at the standard utility frequency (typically 50 or 60 Hz), which simplifies traction substations.