Instruction Manual

4–4 Start–Up and Adjustment
Publication 1397-5.0 — June, 2001
Figure 4.2
Control TransformerTap Settings
400-600 HP @ 460 VAC
400 & 500 HP
SB
H1 H2 H3 H4
X3 X2 X1
F
600 HP
RV
H1 H2 H3 H4
X3 X2 X1
F
Primary
460V
Secondary
115V
460V
Primary
Secondary
115V
183
182
188A
189A
188A
189A
183
182
Converting a 300 HP 1397 Drive from 460 to 230 VAC Line Input
Unlike lower horsepower units, 200-300 HP 1397 Drives can be
converted from 460VAC input to 230 VAC input without the use of a
conversion kit. To convert a 300 HP Drive perform the following
steps:
• Disconnect and lock out all incoming power to the Drive.
• Disconnect the jumpers between H2 and H3 on the control
transformer as shown in Figure 4.3.
• Use the jumpers that were removed to connect H1 to H3 and H4
to H2, as shown in Figure 4.3.
• Reconnect power to the Drive.
• Access parameter 51 [Nominal AC Volt], Set the value to 230.
Converting a 600 HP 1397 Drive from 460 to 230 VAC Line Input
Converting a 600 HP Drive from 460 to 230VAC input is NOT
recommended.
A 600 HP 1397 Drive operating off a 230VAC line input may not
have sufficient voltage for the field supply.