Table 7-5.--Leading Particulars for the DA-675/MSM Load Bank--Continued
OPERATING CAPABILITIES
Ambient Temperatures
-67F to +160F (-55C to +71C).
Relative Humidity
100 percent.
Altitude
Sea level to 6,000 ft.
Mobility
Maximum towing speed on improved surfaces: 20 mph.
Air Transportability
To 50,000 ft.
Emergency Landing
Horizontal: 8 g
g Force Limits
Vertical: 6 g
ELECTRICAL SYSTEMS CHARACTERISTICS
28 Vdc, Aircraft Servicing
0 to 1,500 A, continuous resistive loading.
Loading Increments
Variable: 0 to 55 A; Fixed: 50-100-100-200-200-450-450 A
28 Vdc, Jet Starting
0 to 1,500 A, continuous resistive loading.
Loading Increments
Variable: 0 to 55 A; Fixed: 50-100-200-200-450-450 A
28 Vdc, Common Bus
0 to 3,000 A, continuous resistive loading. Aircraft Servicing
and Jet Starting sections internally paralleled.
120/208 V, 3-phase, 4-wire, 400 cycles,
0 to 187.5 KVA continuous 1.0 to 0.2 Power Factor Lag (375
KW, 183.7 KVAR).
resistive-reactive loading
Loading Increments, Resistive
Variable: 0 to 3.5 KW; Fixed: 3-6-12-24-45-47-47 KW. 187.5
KW total.
Loading Increments, Reactive
Variable: 0 to 3.0 KVAR; Fixed: 3-6-12-15-30-30-30-30
KVAR. 189 KVAR total.
LOAD PROGRAMMING
28 Vdc, Common Bus
0 to 3,000 A for 5 min. 0 to 3,000 A for 5 sec.
28 Vdc, Split Bus, Hard Start
0 to 1,500 A for 20 sec.
5/28 Vdc, Split Bus, Soft Start
1,000 A for 10 sec followed by 200 A for 10 sec.
120/208 V, ac, 3-phase, 4-wire, 400 cycle,
0 to 281.25 KVA for 5 min, 1.0 to 0.47 P.F. lag
resistive-reactive loading
0 to 375.0 KVA for 5 sec, 1.0 to 0.57 P.F. lag.
POWER REQUIREMENTS
Load Element Cooling Fans
26 to 28 Vdc from input power to dc sections or from ac input
power through transformer-rectifier module.
Control Circuit
28 Vdc from input power to dc sections or from ac input power
through transformer-rectifier module.
Panel Lights
28 Vdc from input power to dc sections or from ac input power
through transformer-rectifier module. Intensity is adjustable.
Extension Light
28 Vdc from input power to dc sections or from ac input power
through transformer-rectifier module.
INSTRUMENT SCALES AND NOMINAL ACCURACIES
DC Voltmeter, 0 to 150 V
Meter:
1% of full scale.
System: 1% of full scale.
7-53