When pulsing a line to establish a fault, the Aquatronics EG 3000T Secondary Cable Fault Locator applies only the breakdown voltage needed. 

Just as important, once the breakdown or flash to ground is achieved, the voltage is automatically reduced to the minimum amount needed to keep the fault alive and the fault current is increased. 

Aquatronics EG 3000T Secondary Cable Fault Locator features:

• Up to 2.2 amps is available to locate through asphalt and concrete or dry sand and soil
• Faults up to 20 Meg-ohm. Over 2 amps of current available
• Automatic voltage control. Up to 3kv output 
• Operates from 120v source, 12volt external source, or 12 volt 7Ah rechargeable internal battery
• Prevents cable insulation damage. Proof tests cables before returning them into service 
•  Hookup protection