ES0755 rev A 1/11
9
10
. Remove the key from the control cabinet and give it to the shop manager.
i
nstallation
P
rocedure
for
e
xternal
480v 60h
z
t
ransformer
Introduction
The external transformer adds to overall machine reliability and performance, however it does require extra
wiring and a place to locate it. The external transformer provides electrostatically shielded isolation. This type
of transformer acts to isolate all common mode line transients and improve EMI conducted emissions.
The external transformer has a 45 KVA rating. It should be used only in 60Hz applications.
Installation
The transformer should be located as close to the machine as possible. The input and output wiring of the
transformer should conform to the local electrical codes and should be performed by a licensed electrician.
The following is for guidance only, and should not be construed to alter the requirements of local regulations.
The input wire should not be smaller than the 6AWG for the 45KVA transformer. Cable runs longer than 100”
will require at least one size larger wire. The output wire size should be 4 AWG.
The transformer is 480V to 240V isolation transformers with delta wound primary and secondary windings.
The primary windings offer 7 tap positions, 2 above and 4 below the nominal input voltage of 480V.
For domestic installations and all others using 60Hz power, the primary side should be wired as follows:
Input Voltage Range
Tap
493-510 1
(504)
481-492 2
(492)
469-480 3
(480)
457-468 4
(468)
445-456 5
(456)
433-444 6
(444)
420-432 7
(432)
This should produce a voltage on the secondary side of 234-243 V RMS L-L. Verify this and readjust the taps
as required. At the machine, connect the cables at the input of the internal 230V transformer to the 227-243V
taps. Apply power to the machine and verify that the DC voltage between pins 2 and 3 of the Vector Drive
(2nd and 3rd pins from the left) is 329-345VDC. If not, return to the 480V isolation transformer and readjust
the taps as required. Do not use the taps on the internal 230V transformer to adjust the voltage.
i
nstallinG
the
h
ydraulic
c
ounterbalance
s
ystem
The hydraulic counterbalance system has been discharged of nitrogen (but contains the correct volume of
fluid) and the hydraulic counterbalance cylinder has been removed from the column for overhead clearance in
the shipping configuration. The hoses have been disconnected from the hydraulic cylinder and plugged. The
two shoulder screws that secure the hydraulic cylinder to the top of the column have been stored by tighten-
ing them into the threads on the cylinder mounting surface on top of the column. The column axis has been
disabled for safety reasons when initially powering up the machine.
1. Remove the counterbalance cylinder from the crate and unwrap it.
2. Remove the flat washer and two jam nuts from the end of the rod.
3. Remove the two shoulder screws from the threads in the mounting surface on top of the column.
4. Remove the plug from the port of the cylinder and fully extend the cylinder rod.
5. Insert the counterbalance cylinder down through the top of the column and feed the end of the
rod through the mating hole in the back of the spindle head.
