34
TEST 5 MAXIMUM FAULT CURRENT CALCULATIONS
Figure 11 shows the conditions for calculating maximum fault current
which could flow accidentally at Test Point A with a faulty cable. The
maximum fault current would be:
resistance
element
auxiliary
3
voltage
nominal
maximum
×
TEST 6 VOLTAGE-ADJUSTING KNOB
To check the correct operation of the voltage-adjusting knob on the LED
phasing tester, the following procedure should be performed for at least
four different settings over the full range of adjustment.
a. Set the voltage-adjusting knob to the desired setting.
b. Touch the detector element to a variable source of high voltage
(the auxiliary element being held clear).
Figure 11: Conditions for Maximum Fault Current
TEST
POINT
A