Specifications

J326XP-IM-5AB
1-10
Specifications and Preinstallation Requirements
Preinstallation Requirements
Additional Requirements for Three-Phase Power Connections
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.
Figure 1.3 Correct and Incorrect Three-Phase Power Configurations
Tab le 1 .2 Required Wire Connections
Wire Insulation Color Ter mina l
Symbol
Harmonized North American
Green/Yellow Earth ground
Light Blue Neutral N L
Brown Live or Line L L
Black (three-phase
connections only)
Live or Line (qty 2) L —
1. Correct Configuration “Y”
2. Incorrect Configuration “Delta”
3. Safety Ground
4. Circuit Common (Neutral)
180–264
312–456
12
3
4