Specifications

Southwestern Industries, Inc.
ProtoTRAK SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual
18
2.11 Electrical Connection
The TRAK K2, K3 & K4 Knee Mills can be configured for 220 or 440 volt 3 phase electricity.
These machines also require a 110V power source to power the control. NOTE: Machines
with Optional Spindle Control is only available in 220 V configurations.
DANGER!
Be certain that 200-volt electricity (typical range 208 – 240V) is used only with a machine labeled
220 volts at the motor and at the electrics box on the back of the column.
Be certain that 400-volt electricity (typical range 415 - 460V) is used only with a machine labeled
440 volts at the motor and at the electrics box on the back of the column.
DANGER!
The 220 or 440-volt line must originate from a dedicated and independent fused box with a
manual shut-off lever. It is the responsibility of the purchaser to supply a wired box that meets
all local codes and regulations.
Incoming
220 or 440-volt power connects to the machine through the electrical box located on
the back of the column. The power cable enters the black box through a hole on the top of the
box.
DANGER!
Only a qualified electrician should wire the 220 or 440-volt 3-phase electricity.
To convert a K2 or K3 machine from 220 to 440 volt power or vice versa 3 things must happen:
spindle motor must be rewired, overload relay must be set to 8.5 amps for 220 V and 4.25 for
440 volts and the voltage stickers on the electric’s box must be replaced.
To convert a K4 machine from 220 to 440 volt power 3 things must happen: spindle motor must
be rewired, overload relay must be replaced and set to 14 amps for 220 V and 7 for 440 volts
and the voltage stickers on the electric’s box must be replaced.
NOTE: Voltage conversion from 220V to 440V not applicable to machine fitted with
the Spindle Control Option.
See Section 5.1.12 for a diagram of how to rewire the spindle motor.
Southwestern Industries recommends the machine be earth grounded by driving a copper rod
into the ground. It is the responsibility of the customer to install this rod.