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  TM 11-6130-385-34
(2) 27-vdc-237.5-watt test. Proceed as in (1)
on and raise the input voltage to 24 vdc. If direct
proceed to
a b o v e and record.
6 amperes,
current
exceeds
(3) 2 4 - v d c 2 3 7 . 5 - w a t t
t e s t . Proceed as in (1)
troubleshooting section of this manual. Observe and
a b o v e and record.
r e c o r d voltage output, distortion, and frequency as
(4) 2 4 - v d c 1 1 8 . 5 - w a t t
t e s t . Proceed as in (1)
required by table 3-9. If the parameters are outside
a b o v e and record.
the established limits as shown on table 3-8, proceed
(5) 2 7 - v d c 1 1 8 . 5 - w a t t
t e s t . Proceed as in (1)
t o troubleshooting section.
a b o v e and record.
c. Repeat b above at 27 and 30 vdc and record.
(6) 3 0 - v d c - 1 1 8 . 5 - w a t t
test.
Proceed as in (1)
3-44. Load Test Procedure
a b o v e and record.
a. Equipment Setup.
3-47. Inductive Power Factor Test
On.
(1) L o a d
a. Equipment Setup.
( 2 ) Load function
Unity PF.
On.
(1) L o a d
AØ .
(3) Wattmeter selector
Inductive P. F. (+.85).
(2) Load function
Vdc.
( 4 ) Monitor selector
AØ .
(3)
Wattmeter
selector
b . Testing Procedure Sequence.
Vdc.
(4) Monitor selector
(1) Begin with all loads at zero.
b . Inductive P. F./ ( + .85 ) Tests.
( 2 ) Raise input voltage to required value.
(1) 30- vdc 106.3-watt test. With input voltage
( 3 ) Select wattmeter AØ and monitor selector
a t 30 vdc and output power at 106.3 watts, record
as required.
direct current, output voltage, and distortion as
for watts required by the
(4) Adjust AØ
required per table 3-9. Repeat this procedure as
p a r t i c u l a r setup on table 3-9.
r e q u i r e d for a particular load.
( 5 ) Readjust input voltage as required.
(2) 2 7 - v d c 1 0 6 . 3 - w a t t t e s t . P r o c e e d as in (1)
(6) Repeat (3), (4), and (5) above for BØ .
a b o v e and record.
(7) Repeat (3), (4), and (5) above for CØ .
test. P r o c e e d as in (1)
(3) 24-vdc106.3-watt
c. Special Loads. Repeat b above as required for a
above and record.
particular load.
(4) 2 4 - v d c 2 1 2 . 5 - w a t t t e s t . P r o c e e d as in (1)
3-45. Unity Power Factor Load Test Procedure
a b o v e and record.
a. 30- Vdc---l25-Watt Test. With the input voltage
(5) 2 7 - v d c 2 1 2 . 5 - w a t t t e s t . P r o c e e d as in (1)
and output power set to 30 vdc and 125 watts,
a b o v e and record.
respectively,
r e c o r d t h e d i r e c t c u r r e n t , output
t e s t . P r o c e e d as in (1)
(6) 3 0 - v d c - 2 1 2 . 5 - w a t t
v o l t a g e , distortion, and frequency as required on
a b o v e and record.
particular load.
Test. Proceed as in a above
b. 27- Vdc 125- Watt
a. Preliminary Test Settings.
and record.
On.
(1) L o a d
Test. Proceed as in a above
c. 24- Vdc --125- Watt
Overload.
(2) Load function
AØ .
and record.
(3) Wattmeter selector
Test. Proceed as in a above
d. 24- Vdc 2.50- Watt
Vdc.
(4) Monitor selector
and record.
b. Test Procedure. Set the input voltage to 18 vdc
Test. Proceed as in a above
e. 27- Vdc--250- Watt
and output power to 218 watts. Repeat this
p r o c e d u r e as required for a particular load. Record
and record.
f. 30- Vdc250- Watt
Test. Proceed as in a above
direct current, output voltage, and frequency on
and record.
3-46. Capacitive Power Factor Tests
3-49. Overload Test
a. Equipment Settings.
a. Equipment Setup.
(1) Load
On and off.
On.
(1) L o a d
Overload.
(2) Load function
(2) Load function
Capacitive P. F. (.95).
AØ .
(3) Wattmeter selector
AØ .
(3) Wattmeter selector
Vdc.
(4) Monitor selector
Vdc.
( 4 ) Monitor selector
b. Capacitive PF (.95) Tests.
b . Test Procedure.
(1) 30-vdc237.5-watt test. With the input
(1) With the load off, adjust the input voltage to
voltage at 30 vdc and output power at 237.5 watts,
26 vdc. Adjust each load to 4.36 amperes. With load
record direct current, output voltage, and distortion
on, allow the unit to be overloaded 5 seconds. Record
as required on table 3-9. Repeat this procedure as
the direct current and output voltage on table 3-9.
required for a particular load.
(2) Turn the load to on and adjust load for 250
3-53
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