12 Questions
What is the potential danger when proper safety procedures are not followed while working on electric and hybrid electric vehicles?
Serious injury
Who should not service or repair electronic medical devices such as cardiac pacemakers?
Technicians who rely on them
How are HV components identified?
By warning labels and colors
What voltage represents a shock hazard?
High voltage over 60 volts
What safety equipment should be worn when working on or near a potential HV circuit or component?
Eye protection and HV gloves
What can happen if there is accidental and unprotected contact with any electrically charged HV component?
Serious injury
How can a vehicle be powered?
Combination of both
What type of digital multimeter is required for making measurements on high-voltage systems?
Category three (CAT III) certified
What are the different categories of voltage standards for meter and meter leads according to the IEC?
Three categories
Which meter is a higher-rated meter than CAT I for HV measurements?
CAT II
What do insulated hand tools provide?
A margin of safety
What is used in the HV system to detect opens in circuits and keep the vehicle safe?
Contactors or relays
Study Notes
- Electric and hybrid electric vehicles use high-voltage circuits that can cause serious injury or death if proper safety procedures are not followed.
- Electronic medical devices such as cardiac pacemakers should not be serviced or repaired by technicians who rely on them.
- HV components are identified with warning labels and colors.
- Low voltage does not represent a shock hazard, but high voltage over 60 volts does.
- Eye protection and HV gloves should be worn when working on or near a potential HV circuit or component.
- Accidental and unprotected contact with any electrically charged HV component can cause serious injury or death.
- The vehicle may be powered by the electric motor only, gasoline engine only, or a combination of both.
- A category three (CAT III) certified digital multimeter is required for making measurements on high-voltage systems.
- The IEC has several categories of voltage standards for meter and meter leads.
- CAT II is a higher-rated meter than CAT I for HV measurements.
- Different types of meters and tools are required for working on hybrid and electric vehicles.
- Meters are rated by CAT levels, with higher levels providing greater protection.
- Insulated hand tools provide an additional margin of safety.
- The HV system uses contactors or relays to detect opens in circuits and keep the vehicle safe.
- Local interlocks detect opens in LV circuits and trigger the controller to depower the HV circuits.
- Service information procedures must be followed to safely depower the vehicle before working on certain components.
- Orange cables run under the vehicle and caution must be used when hoisting or using a floor jack.
- HV cables cannot be repaired and are expensive to replace.
- After servicing, orange HV cable ends should be taped and the vehicle should be marked with a "HIGH VOLTAGE - DO NOT TOUCH" sign.
- Electric and hybrid vehicles emit warning sounds at low speeds to warn pedestrians.
Test your knowledge on electric and hybrid electric vehicle safety with this informative quiz! Learn about the potential hazards of working with high-voltage circuits and components, the necessary safety procedures to follow, and the specialized tools required for servicing these vehicles. From identifying HV components to understanding CAT levels, this quiz covers it all. So put on your thinking cap and see how much you know about electric and hybrid electric vehicle safety! Keywords: electric vehicles, hybrid electric vehicles, high-voltage circuits, safety procedures, specialized
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