Space And Location Requirements; Figure 1-3. Correct And Incorrect Three-Phase Power Configurations - Beckman Coulter Avanti J-25 Instruction Manual

Specifications and Preinstallation Requirements
Additional Requirements for Three-Phase Power Connections
Safety
Ground

SPACE AND LOCATION REQUIREMENTS

1-10
For three-phase power service to the centrifuge, use the "Y"
connected three-phase configuration shown in Figure 1-3. Also note
the following information:
• The steady state current draw of the centrifuge can be as high as
12 amperes per phase, depending on the voltage.
• Inrush current to the centrifuge is 100 amperes for up to 2 seconds
during the refrigeration start period. Circuit breakers, whether
thermal or magnetic actuating, must be a "motor start" delay type.
• The centrifuge can tolerate a drop of 15 volts during the start
period at low line voltage (see Figure 1-3 for the acceptable
voltage ranges). The mains power for the centrifuge must be of
sufficient wire gauge to provide this condition. The wire gauge
required at a particular site must be determined by a facilities
engineer at that site.
Correct Configuration
"Y"
312–456
180–264
N

Figure 1-3. Correct and Incorrect Three-Phase Power Configurations

• Locate the instrument on a clean, level floor.
• Select a location away from heat-producing laboratory equipment.
If ambient temperature exceeds 38°C (100°F), premature compo-
nent failure may result.
Circuit
Common
(Neutral)
Incorrect Configuration
"Delta"