CABLE PLUG HEAD
P O W E R C O N TA C T
POWER
C O N TA C T
L O C K WA S H E R
LUG
LOCKING SCREW
PULL ROD
TOOL
VISE
C O N TA C T
HOLDING
TOOL
1/4" DRIVE
SOCKET FITTED
ASf07060
TO 5/32" HEX ROD
Figure 7-60.--Special tools.
load bank sections (ac and dc) may be operated
b e e n c h a n g e d , a n d i t i s n ow k n ow n a s t h e
individually or simultaneously without influencing
DA-675/MSM. There is very little difference between
each other's loading capabilities. A control power
the two units. Table 7-5 lists the basic physical,
circuit in the load bank for supplying power to the
electrical, and environmental specifications for the
cooling fans, lights, and load control relays and
load bank.
contactors is common to both sections. Power for this
control power circuit may be taken from either the ac or
OPERATING INSTRUCTIONS
dc section inputs. When taken from the ac input, the
The load bank is designed to perform electrical
control power is indicated by the ac load meters as part
loading tests on power plants rated at either 28 volts dc
of the total ac load. When taken from the dc input, the
control power is indicated as part of the total dc load.
or 115/200 volts, three-phase, four-wire, 400-Hz. Both
Table 7-5.--Leading Particulars for the DA-675/MSM Load Bank
TRAILER
Chassis and Running Gear
Welded steel construction; leaf-spring type suspension.
Equipped with pintle hook, lifting and tie-down rings, and
forklift channels. Travels on four steel wheels, each mounting
6:90 9, 10-ply pneumatic tires and tubes. Normal inflated
pressure is 40 pounds.
Towbar
Reinforced steel elliptical construction with welded lunette eye.
Removable pivot pin and latch to maintain in vertical position.
Brakes
Mechanical: adjustable, expanding-shoe type acting on two rear
wheels. Applied by hand lever.
Enclosure
Removable welded steel weatherproof housing. Hinged doors
for operating and servicing accessibility.
7-52
