Specifications

Document No. DER03022 INSTALLATION INSTRUCTIONS
Page 10 of 15 Effective Date 23 Dec 08
ELECTRIC POWER CONNECTIONS
WARNING! DANGEROUS VOLTAGE IS PRESENT. IF THE INPUT POWER IS
SPLIT, BE SURE THAT PHASING IS CORRECT BEFORE APPLYING POWER
TO CENTRIFUGE.
Connection Options
Connect the facility’s three-phase electric power supply to the control cabinet in accordance with
the appropriate view in Figure 3022-8. Non-hazardous area control cabinet connections are made
inside the control cabinet; hazardous area connections are made in the electrical panel attached
to the right side of the cabinet.
Note that power may be connected with either a single heavy-gage cable or split between two
smaller, lighter cables. The smaller-gage cables used for the split-input connections are generally
easier to handle. The input cabling components required for the two options are as follows:
Option 1 - One 4/0 AWG cable per phase and one 3” NPT gland
Option 2 - Two 2 AWG cables per phase and two 2” NPT glands
If the input is split (Figure 3022-9) as described in Option 2, be sure to group conductors of the
same phase/color. Refer to the electrical schematic diagram in Section 11 - Reference Drawings
for additional information on electrical connections and ratings.
Non-Hazardous Area Control Cabinet Hazardous Area Control Cabinet
Figure 3022-8 Electric Power Connections