(b) Connect cable from generator ignition (A, foldout 6) to the F
(c) Install the links between G+ and B+ connectors and also between
G-and B-of the regulator section. This straps the batteries and loads to the
(3) Before starting the varidrive, place the test stand switches and
selectors in the following positions:
(a) Place the DC ammeter load and starter selector (1) in the 150A
(b) Set the DC ammeter field and battery charger selector (2) in the
(c) Set the DC voltmeter range selector (5) in the 50V position.
(d) Set the DC voltmeter range selector (6) in the RECT/GEN
(e) Set the field circuit switch (36) in the MANUAL position.
(f) All load switches (34) to the OFF position.
(g) Verify that the ground polarity switch (33) is in the negative
(h) Verify that the field current control (41) is counterclockwise.
(i) Verify that the battery selector (31) is OFF.
(4) Testing procedure. Start the varidrive by actuating the start
button (28) and turning the drive speed control (42) counterclockwise until the
direct drive pulley is operating at 2,000 RPM, so the tachometer "CAL PULLEY"
position can be calibrated.
(a) Once the generator pulley has been calibrated, the generator
pulley is to be adjusted to between 1,500 and 1,800 RPM.
TO PREVENT DAMAGE TO THE INTERNAL RECTIFIER, THE VOLTAGE MUST NOT EXCEED
32 VOLTS. INCREASING THE LOAD CURRENT CAUSES THE VOLTAGE TO DECREASE;
DECREASING THE LOAD CURRENT CAUSES THE VOLTAGE TO INCREASE. SO IF THE
VOLTAGE WAS SET TO 28 VOLTS AND THE LOAD CURRENT WAS DECREASED, THE
VOLTAGE COULD EXCEED 32 VOLTS, PROVIDING THE FIELD CURRENT ISN'T TOUCHED.
(b) Place the battery selector to the 24V position.
(c) Turn the MASTER LOAD switch (39) to the ON position.
(d) Adjust the field current control (41) for a 28-volt reading on
the DC voltmeter; the field current should not exceed 1 ampere.
(e) Gradually apply a 60-ampere load while maintaining 28 volts.
1. Turn the 0-25A LOAD switch (34) to the ON position and
adjust the LOAD CURRENT CONTROL (43) for 60 amperes on the LOAD meter while
maintaining 28 volts on the DC voltmeter.
OS 010, 4-P13