AMETEK Ls Series - Manual (Page 125)

User Manual Lx / Ls Series
121
VOLT MIN
This test will set the voltage and frequency to levels defined by Table 8-12 for 5 minutes. The test
will be repeated for Group1 only as indicated in Table 8-12. All Groups will repeat the test using
Table 8-12 for the voltage setting and Table 8-11 for the frequency setting. The
key
(backspace) will terminate the test at any time.
VOLT UNBALANCE
This test applies only to RTCA2 standard.
Standard/Group A(CF) A(NF) A(WF)
Voltage offset 6 6 8
Frequency 400 360/650 360/800
Table 8-13: Abnormal Voltage Unbalance
This test will change the output voltage for phase A and B to 134V and phase C to a voltage
lower by a value specified by an offset. Refer to Table 8-13 for the offset value and the
Frequency. The test will repeat with the same frequency and phase A and B volt is set to 97V
and phase C set to a higher voltage specified by the offset. The test will last 5 minutes. The test
will be repeated for a second Frequency if applicable. Additional test for A(CF) category is
applied with phase A and voltage set at 122V and phase C at 116V. The frequency is set at
430V. The test is repeated with the same frequency but phase A and B are set at 100V and
phase C set at 106V. Both tests are repeated for 370Hz.The test can be terminated at any time.
The
key (backspace) will terminate the test at any time.
VOLT UNDER
This test will drop the output voltage from 115 volts to 60 volts for 7 seconds.
VOLT SURGE
This test requires 180 volt output voltage. If the power source is set at the low voltage range, the
high voltage range will be selected before the test starts. At the end of the test the AC source will
be switched back to the low range.
Note: To avoid switching to the high voltage range which provides only half the current of the low
voltage range, the -EHV option range pair must be installed (200/400V).
The output voltage will surge to 180 volts for 100 ms. followed by drop to 148 volts for 1 sec
before it returns to 115 volts. The
key (backspace) will terminate the test at any time.