Connections; Figure 1-3. Correct And Incorrect Three-Phase Power Configurations - Beckman Coulter Avanti J-20 XP Instruction Manual

ADDITIONAL REQUIREMENTS FOR THREE-PHASE POWER CONNECTIONS
Correct Configuration
Safety
Ground
312–456

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

For three-phase power service to the centrifuge, use the "Y"
connected 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.
"Y"
180–264
Circuit
N Common
(Neutral)
• 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.
Specifications and Preinstallation Requirements
Incorrect Configuration
"Delta"
1-11