Emergency Power Source Types

• Generator
• Accumulator battery

Generator Requirements

• Prime Mover: Driven by a suitable prime mover with independent fuel supply
• Fuel Flashpoint: Not less than 43°C (closed cup test)

Location and Installation

• Above the uppermost continuous deck
• Away from machinery space
• Behind the collision bulkhead
• Main switchboard should not interfere with emergency power supply, control, and distribution

Operational Capabilities

• List and Trim: Operable with a list of up to 22.5° and a trim of up to 10°
• Duration:
  • Cargo ship: 18 hours
  • Passenger ship: 36 hours
• Starting Temperature: 0°C (heating arrangement required for lower temperatures)
• Automatic Start: Within 45 seconds after main power failure
• Failure Indication: To be given in ECR if emergency generator fails to start

Starting Arrangements

1. Primary: Battery
   • Always fully charged
   • Capable of 3 consecutive starts
2. Secondary: Pneumatic or hydraulic
   • 3 consecutive starts within 30 minutes
   • First start within 12 minutes

Transitional Emergency Power

• Type: Accumulator battery
• Function: Provides power automatically to emergency lighting during main or emergency power failure
• Voltage Maintenance: Within 12% above or below nominal voltage during discharge

Accumulator Battery as Emergency Source

When used as the main emergency power source:

1. Carry emergency load without recharging
2. Maintain voltage within 12% of nominal during discharge
3. Automatically connect to emergency switchboard upon main power failure
4. Immediately supply power to emergency lighting