Section 1
General Information
Receiving & Installation 3-13
MN718
AC Line Connections
Be sure all power to the control is disconnected before proceeding. If power has been
applied to the control, wait at least 5 minutes after power disconnect for residual voltage
across bus capacitors to discharge.
Reduced Input Voltage Derating
All power ratings stated in Section 7 are for the stated nominal AC input voltages (230,
460 or 575VAC). 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:
For example, a 10HP, 230VAC control operating at 208VAC has a reduced power rating
of 9.04HP.
10HP
208VAC
230VAC
9.04HP
Likewise, a 10HP, 460VAC control operating at 380VAC has a reduced power rating of
8.26HP.
10HP
380VAC
460VAC
8.26HP
To obtain the full output rating of 10HP in either case requires a 15HP Control.
380-400 VAC Configuration
Size A and B controls may be used directly with a 380-400 VAC power source,
control modification is not necessary.
Size C, D, E, F and G controls all require modification for operation on the reduced line
voltage (380-400VAC).
Tap Change Procedure (size C, D, E and F controls).
1.
Be sure drive operation is terminated and control is disabled.
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.
Summary of Contents for 18H Series
Page 1: ...SERIES 18H AC Flux Vector Control Installation Operating Manual 9 97 MN718 VECTOR DRIVE ...
Page 105: ...Section 1 General Information 5 18 Troubleshooting MN718 ...
Page 109: ...Section 1 General Information 6 4 Manual Tuning the Series 18H Control MN718 ...
Page 144: ...Appendix C Appendix C 1 MN718 ...