B-00125 USBS (1
st
Gen) Operation Manual
15
Resistance Test
An optional Resistance Test may be performed in between scheduled maintenance.
This test DOES NOT replace scheduled maintenance or extend the time between
scheduled maintenance.
This test is performed using the Utility Solutions USGT-600 Grounds Tester w/
REACH Technology or equivalent device. Refer to the testers’ instruction manual for
proper set-up procedures.
1.
The BREAK-SAFE® should be in the closed position and RESET with the
external brass contacts fully seated.
2.
Connect the BREAK-SAFE® Conductor Hook to a Current Output Post on the
Grounds Tester. Position and support the BREAK-SAFE® so the weight of the
tool does not apply sideways force on the Current Output post (a small block
of wood should suffice).
3.
Connect a standard Mechanical Jumper (minimum 6 feet, 1/0 AWG, 300
AMP) to the other Current Output Posts of the Grounds Tester and the
conductor bar of the BREAK-SAFE®.
4.
Put the Grounds Tester in REACH mode.
5.
Turn on the Grounds Tester and adjust the Current Control Knob to energize
to 300 AMPS.
6.
Using the red and black Jumper Leads on the Grounds Tester, measure the
voltage on the BREAK-SAFE® between the lower jaw of the Conductor Hook
and the Parking Stand.
7.
Voltage drop should not exceed 0.220 volts. If the voltage displayed exceeds
0.220 volts the tool should be removed from service. Maintenance should be
performed by the factory or by trained and certified personnel.
