7.
Set the desired test current by rotation
of
the VERNIER CONTROL, and then
pressing the
START button per the following procedure.
NOTE: Depending on the position
of
the OUTPUT SELECTOR Switch, the current
may be increased by either
clockwise or counter clockwise rotation
of
the VERNIER
CONTROL
(refer to chart
of
OUTPUT RANGES). For example,
if
the desired test
current
is
7500 amperes, the proper procedure would be to start with the OUTPUT
SELECTOR Switch
in
position 1 and increase the VERNIER CONTROL from "0"
toward "100". However,
if
the impedance
of
the device is such that you cannot get
7500 amperes at "100" on the VERNIER CONTROL with the tap selector on position
"1", switch the OUTPUT SELECTOR Switch to position number 2. On TAP position
#2 the red
scaling is used to increase the output current. Rotate the VERNIER
CONTROL
counterclockwise toward "red 1 00".
If
at full rotation
of
the VERNI
ER
CONTROL, the desired current is not obtained, turn the OUTPUT SELECTOR
Switch
to the next higher position and repeat the procedure until the desired test
current is reached.
Since the PULSE OUTPUT MODE is selected, the output will
only stay energized for programmed number
of
cycles (Default is 5 cycles. See
PULSE DURATION
MENU). The ammeter display will hold the reading
of
the
amperage set. Continue
until the desired current is achieved.
If
at the last position
the desired test current is not reached, connect the output
of
the test set
in
series
(See SELECTION OF OUTPUT CONNECTION, Section IV, 2, A.). Switch the
Ammeter
PARALLEL/SERIES Switch to the SERIES position, return the OUTPUT
SELECTOR Switch to position 1 and repeat the above procedure until the desired
current is achieved.
8.
Select the MAINTAINED OUTPUT
MODE.
9. Select the CONTINUOUS AMMETER MODE.
10.
Wait several minutes to allow the overload relay to cool
or
the
plunger to settle
in
the
dash pot.
11.lnitiate current by pressing START button. The timer will stop and the output will
automatically de-energize when the overload relay operates.
NOTE: Check the ammeter reading during the test
for
accuracy. Minor
adjustments may be made with the OUTPUT
CONTROL while the test is
in
progress.
12. Record the
results and compare them to the manufacturer's specifications.
21
To Next Page
Loading...
Need help?
General
