EV Transit Bus Safety Awareness and Familiarization SC-BEV-5000-I

Prerequisites: DVOM Course (preferred) or thorough understanding of meters or equivalent experience.

Course Description: This course will provide a general understanding of safety do’s and don'ts when working around all-electric high voltage (HV) transit vehicles. This course is not intended as a replacement for manufacture specific training and does not qualify the student to diagnose, repair, and work on HV vehicles.

Course Benefits: Students will become familiar with all-electric high voltage (HV) transit vehicles to include high voltage electrical systems and their safe operation. Students will learn essential aspects of the high-voltage drive system including safety protection and safe operation.

Who Should Attend: Transit agency technicians/mechanics who need to familiarize themselves with all-electric high voltage (HV) transit vehicles.

What you will learn:

• Identify the vehicles high-voltage components
• Explain the required Personal Protective Equipment (PPE)
• Describe the preparations prior to working on or near any high-voltage systems
• Explain the vehicle safety systems
• Identify HV Components and cables in an EV transit bus
• Understand the definitions, terminology, and units of measure, of electrical energy storage and consumption

Course Outline

Similarities & Differences of Transit Bus Equipment

• Similar Components in both transit bus systems
• Braking Systems
• Air Suspension System
• Interior and Exterior Lighting, Exterior Mirrors
• Cooling System Operation
• Door System
• Low Voltage
• Multiplexer (MUX) & CAN (Controller Area Network)
• Grounding
• Different Bus Components with HV Systems
• Heating unit - electrically powered
• A/C compressor
• Air Compressor
• Power steering unit
• Electrical wheel hub drive motor
• Regenerative braking

High Voltage System Overview

• HV Components
• HV Power Distribution
• Regenerative Braking
• HV Defrosters
• Contactor Box (High Voltage distribution)
• On-Board Chargers (VtoG or Inverters)
• HV Battery

Safety and Personal Protective Equipment (PPE)

• Safety Precautions
• Understanding NFPA 70E
• Lock out Tag out
• HV Power down
• HVIL - High Voltage Interlock Loop
• Rooftop Access Safety
• Appropriate PPE and Tools
• High Voltage Safety Equipment

Units of Energy – Differences between fuel and electrical energy

• Energy Units of Measure
• Energy Equivalent

Facility Considerations for EV transit vehicles

• Fluid change
• Oil change
• Charging Equipment Systems
• J1772 CCS Type 1
• Overhead charging (Proterra buses)

Number of Hours/Days: 16 hours in-class for 2-day instructor facilitated training.

Continuing Education Units (CEU): 0

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