Grizzly H2933 Instruction Manual page 38

440V Connection
To connect this machine to 440V three-phase,
you must purchase two overload relays. Each
machine model may require unique relays, so
refer to 440 Conversion Relays on Page 73 for
the relay part numbers.
If you do not have three-phase power available for
your wide belt sander, you must install a phase
converter such as a Grizzly Phase Converter.
Note: When using a phase converter, the power
from the manufactured power leg (sometimes
called the wild wire) can fluctuate. Connect the
manufactured power leg to the S terminal to pre-
vent damage to the transformer. The wire from the
S terminal can handle some fluctuation because
it goes directly to the motor. The power going to
the R and T terminals goes to the transformer and
must be consistent to prevent damage.
To wire the sander to 440V:
1. DISCONNECT THE SANDER FROM THE
POWER SOURCE!
2.
Open the electrical box located on the back
of the machine.
3.
On the transformer, remove the wire con-
nected to the 220V terminal for your model of
sander, and connect it to the 440V terminal
as shown in Figures 7.
0
1 0v
3
2
E
Figure 7. 440V connection.
-14-
H2933
H2934
380v 415v
440v
G0447
200v 220v G0581
0v
4. Refer to Figure 8 and find the power panel
on your machine.
5.
Swap out the applicable thermal relay at the
locations shown in Figure 8, and set it to the
overload values listed.
H2933
LR3D-076
Set to:
(1.6-2.5A)
LR3D-3322
Set to:
(17-25A)
LR3D-216 LR3D-086
Set to: Set to:
(12-18A) (2.5-4A)
Figure 8. Overload relays.
6. Wire the sanding belt, conveyor belt, and
table elevation motors as shown on the
diagrams on the inside of each motor wire
cover, or refer to Motor Wiring on Page 55.
H2933/H2934/G0447/G0581 Wide Belt Sander
H2934
G0447
LR3D-216
Set to:
(12-18A)
LR3D-076
Set to:
(1.6-2.5A)
G0581