HC 75C
8-6
TESTING PROCEDURE
CURRENT HOLD MODE
After performing the steps under BASIC OPERATION, follow the steps below to perform the Current Hold
function. Although this continuous mode of operation is possible, the recommended method for reaching
a HOLD current is to use the JOG to HOLD function.
1. Click Settings in Test Parameters: Enter the desired output current set point. This is the current
that the test set will continuously increase to.
2. Ensure that the breaker status indicator indicates that the Breaker is CLOSED.
3. Click the START button to begin the test.
Note: If the regulator speed is set too high, the test set may overshoot the set point and will be
constantly adjusting the variable transformer to try to obtain the set point current. If this
occurs, use the speed control to decrease the regulator speed until the variable
transformer movement is acceptable.
If the desired current is obtained at a low Tap and Vernier position, it may be impossible
to hold the set value accurately. Better results can be obtained by adding impedance
(such as longer cables), to raise the Tap and Vernier settings.
4. The test set will automatically increase the current up to the HOLD AMPS setting and remain ON
until either the operator clicks STOP, the circuit breaker trips, or the MAX DURATION or MAX
CYCLES is reached. Click the STOP button to stop the test at any time.
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