TM 9-4120-404-14
g. Fabricate a power cable in accordance with Appendix F.
WARNING
HIGH VOLTAGE
is used in operation of this equipment.
DEATH ON CONTACT
may result if personnel fail to observe safety precautions.
Never work on electrical equipment unless there is another person nearby who is
familiar with operation and hazards of equipment and who is competent in
administering first aid. When technician is aided by operators, he must warn them
about dangerous areas.
Input power supply to equipment must be shut off before beginning work. When
working inside, after power has been turned off, always ground every part before
touching it. Be careful not to contact high voltage connections when installing or
operating this equipment.
WARNING
Whenever nature of operation permits, keep one hand away from equipment to
reduce hazard to current flowing through vital organs of body. Do Not operate
equipment without all guards, louvers, and covers in place and tightly secured.
h. Connect power cable to 208 VAC, 3 phase, 50/60/400 Hz power source. Check input power as follows:
(1) Apply power to power cable.
(2) Use a multimeter set to AC voltage range of at least 250 volts for following tests.
(3) Measure voltage between pin D of connector and pin E (chassis ground). Voltage must be zero (0). If
more than zero voltage is observed, disconnect cable and check power source. Correct problem at power
source or at cable connection as indicated.
(4) With zero voltage on pin D of connector, check voltages between remaining pins as shown on Table 3-1 for
208 VAC, 3 phase, 50/60/400 Hz power input. Voltages should be approximately as shown. If voltages are
not within ten volts of those indicated in Table 3-1 as applicable, disconnect power. Locate and correct
problem.
CAUTION
Insure mode selector switch is set to OFF and circuit breaker is in OFF position.
Connecting power source with unit in operating position may damage electrical
components.
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