440v conversion
440V Conversion
The Model G0646/G0647 can be converted for 440V operation. This conversion job consists of disconnecting the machine from the power source, changing the connections on the voltage transformer, replacing the overload relay, and rewiring the motor for 440V operation.
The necessary overload relay for this procedure can be purchased by calling Grizzly Customer Service at (800)
All wiring changes must be inspected by a quali- fied electrician before the machine is connected to the power source. If, at any time during this pro- cedure you need help, call Grizzly Tech Support at (570)
To rewire the Model G0646/G0647 for 440V operation:
1.DISCONNECT MACHINE FROM POWER!
2.Rotate the main power switch to OFF or "0" and the electrical cabinet door lock to the horizontal, then open the door to access the voltage transformer (see Figure 6).
3.At the voltage transformer, remove the wire labeled "S" that leads to the “220” terminal, and connect that wire to the “440” terminal (see Figure 7).
| ���� | �� | ��� |
�� | ���� |
| ��� |
� | � � | � | � � |
��
� �� �� ���� ����
Figure 7. "S" wire connected to the 440V
terminal of the voltage transformer.
4. Remove the overload relay and replace it with | |
the 440V version (Part Number | |
Set the overload relay dial (see Figure 6) to | |
the value for your model: |
|
Model G0646 | 7.5A |
Model G0647 | 8A |
5. Open the junction box on the motor, and | |
rewire the motor as shown on the diagram | |
located inside the motor junction box. |
|
Note: The reference motor wiring diagram on | |
Page 56 was current at the time of printing, | |
but always use the wiring diagram provided | |
inside the motor junction box, as it will reflect | |
any changes to the motor shipped with your | |
Relay
Transformer
machine. |
NOTICE
Figure 6. Voltage transformer and overload relay
inside electrical cabinet.
Note: It may be necessary to put pressure on the upper left corner of the electrical cabi- net door to engage and turn the main power switch.
G0646/G0647 50/65 Ton Ironworker
For 440V connections, an electrician MUST hardwire the machine (using a metal con- duit setup) directly to a locking disconnect switch, which is directly connected to the power source.
