MIL-DTL-62187C
d. Increase generator-alternator speed to 4000 rpm, and remove the resistance load.
e. With generator-alternator speed at 4000 rpm add resistance load to establish a
total current flow of 100 A.
f. With generator-alternator at 4000 rpm, increase resistance load to establish a
current flow of 650 A.
g. Increase generator-alternator speed to 6000 rpm and remove the resistance load.
h. With generator-alternator at 6000 rpm, add resistance load to establish a total
current flow of 100 A.
i. With generator-alternator speed at 6000 rpm, increase resistive load to establish a
current flow of 650 A.
j. Increase generator-alternator speed to 8000 rpm and remove the resistance load.
k. With generator-alternator at 8000 rpm, add resistance load to establish a total
current flow of 100 A.
l. With generator-alternator speed at 8000 rpm, increase resistive load to establish a
current flow to 650 A.
4.4.1.2 Ripple voltage verification. To determine conformance to 3.3.2, the regulator
shall be connected in a circuit as shown in figure 10 and operated at the specified rate and load to
produce a current flow as indicated below. Ripple voltage at point ES shall not exceed 4 V peak-
to-peak.
Rpm
Alternator output current, A (IA)
3000
50
3000
650
8000
50
8000
650
4.4.1.2.1 Abbreviated ripple voltage verification. The regulator shall be tested as
specified in 4.4.1.2, except that the test point shall be 8000 rpm at a load producing an alternator
output current flow of 650 amperes (IA) (see 4.1.2).
4.4.1.3 Overvoltage verification. To determine conformance to 3.3.3, the regulator shall
be connected in a circuit as shown in figure 10 and shall be operated as follows. With SW1 and
SW2 closed, adjust alternator speed to 5000 rpm. Observe system voltage (Es) on an
oscillograph as SW3 is closed. Determine ES where trip occurs. Open SW3 and reset
overvoltage switch on regulator. The field circuit shall be deactivated when the system voltage
(Es) reaches 33.0 1.0 V. Deactivation and return to battery voltage shall be no greater than
0.07 seconds.
4.4.1.3.1 Abbreviated overvoltage verification. With the regulator connected as shown
in figure 11, the power supply voltage shall be increased until overvoltage circuit breaker trips.
The dc voltmeter reading shall be determined only at the overvoltage switch trip point. The dc
10
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