Tweco 151 CutMaster - Manual (Page 19)

Manual 0-4668 3-3 INSTALLATION
C. Connections to 400 - Volt, and 460 - Volt Single- Phase Power
The 400 - Volt or 460 - Volt Power Supplies will accept Single - Phase input power with a change of input power cable.
1. Remove the Power Supply cover per section 5.04.
2. Disconnect the original input power cable from the main input contactor and the chassis ground connection.
3. Loosen the through - hole protector on the back panel of the power supply. Pull the original power cable out
of the power supply.
4. Pass a customer - supplied, three - conductor input power cable through the access opening in the back panel
of the power supply. Refer to Section 2 for power cable specifications. Tighten the through - hole protector to
secure the power cable.
CAUTION
The primary power source and power cable must conform to local electrical code and the recommended circuit
protection and wiring requirements (refer to table in Section 2.03).
5. Strip back the insulation on the individual wires.
6. Connect to main input contactor as follows:
• Line 1 wire to terminal L1.
• Line 3 wire to terminal L3.
7. Connect the ground wire to Ground (Earth). The Ground wire connection requires a ring terminal.
A-03041
L1
L3
Ground Wire
with Ring
Terminal
Main Input
Contactor
Input Cable
L1 L2 L3
Input Power Connections, 400 - Volt or 460 VAC, Single - Phase
8. Replace the Power Supply cover.
9. Connect the input power cable (or close the main disconnect switch) to supply power to the system.