Ac Line Connections; Reduced Input Voltage Derating; 380-400 Vac Operation - Baldor 23H Series Installation & Operating Manual

AC Line Connections

Reduced Input Voltage Derating

380-400 VAC Operation

3-8 Receiving & Installation
All power ratings stated in Section 7 are for the stated nominal AC input
voltages (230 or 460VAC). The power rating of the control must be reduced when
operating at a reduced input voltage. The amount of reduction is the ratio of the voltage
change.
Examples:
A 10HP, 230VAC control operating at 208VAC has a reduced power rating of 9.04HP.
208VAC
+ 9.04HP
10HP
230VAC
Likewise, a 10HP, 460VAC control operating at 380VAC has a reduced power rating of
8.26HP.
380VAC
+ 8.26HP
10HP
460VAC
To obtain the full output rating of 10HP in either case requires a 15HP Control.
Size A, B, B2, C2 and D2 460VAC controls may be used directly with a 380-400 VAC
power source, control modification is not necessary.
Size C, D, E, F and G 460VAC controls all require modification for operation on the
reduced line voltage. Specifically, the control transformer must have the wire on terminal
5 (for 460V) moved to terminal 4 (for 380-400V).
1. Be sure drive operation is terminated and secured.
2. Remove all power sources from the control. If power has been applied, wait at
least 5 minutes for bus capacitors to discharge.
3. Remove or open the front cover.
4. Remove the wire from terminal 5.
5. Place the wire that was removed from terminal 5 onto terminal 4.
6. Install or close the front cover.
Figure 3-2 Control Transformer Identification
MN723