What is the formula for bus voltage?
What is the formula for bus voltage? dc bus voltage is ~1.414 x the rms line voltage (e.g., for a 480V ac drive, the dc bus should be ~678V dc. A dc voltage value that is too low can cause the drive to trip. At the cause, the mains input voltage is probably too low, or the input sine wave might be distorted by flat topping.
Are buses 12 or 24 volt?
The 12-volt rating of a battery is the nominal voltage and it may be slightly higher or lower depending on the state of charge and loads. We sometimes use 24V battery systems in larger trucks and busses due to the vehicle's higher power needs and long cable runs.