AEMC 5070 User Manual page 50

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Where:
- Vpeak is the external voltage, (peak or DC) at the + and – terminals of
the Model 5070.
-
value), 10 or 20%.
- VN is the test voltage selected for the insulation measurement.
The test is to be conducted at 2500 V, dISt is set to 3%. Therefore,
before the test starts, a voltage present at the "+" and "-" terminals of 75 V will
cause the Model 5070 to inhibit testing. (Vpeak = (0.03 x 2500 V) = 75 V)
Similarly, if during the insulation test, an external voltage greater than the V peak
will appear next to the value of the external voltage measured.
Where
- Vpeak is the external voltage, (peak or DC) at the + and – terminals of
the Model 5070.
-
value), 10 or 20%.
- VN is the test voltage selected for the insulation measurement.
test was started, a disturbance voltage (change of voltage) of 2700 V would abort
the test. (Vpeak = (0.03 + 1.05) (2500 V) = 2700 V)
NOTE: The dlSt factor is selected to optimize the measurement build-up time.
If there is no leakage voltage, dlSt can be adjusted to its minimum value to obtain
the shortest possible measurement build-up time.
If there is a large leakage voltage, dlSt can be increased so that the
measurement will not be interrupted as soon as a negative alternation occurs
build-up time in the presence of a leakage voltage.
If the "programmed time test" mode (Timed Run or Timed Run + DD) was
selected as the test mode, the measurement is stopped (without pressing the
START/STOP button) at the end of the test time.
Similarly, if the DAR or PI mode is selected as measurement mode before the
test, the measurement is stopped automatically after the time programmed to
A number of special functions can be used during the measurement (see § 3).
50
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