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1-4 Installation/Wiring<br />
Figure 1.2 Phase to Ground MOV Removal<br />
Input Power Conditioning<br />
The drive is suitable for direct connection to input power within the rated<br />
voltage of the drive (see Appendix A). Listed in Table 1.C are certain<br />
input power conditions which may cause component damage or<br />
reduction in product life. If any of the conditions exist, as described in<br />
Table 1.C, install one of the devices listed under the heading Corrective<br />
Action on the line side of the drive.<br />
Important: Only one device per branch circuit is required. It should be<br />
mounted closest to the branch and sized to handle the total<br />
current of the branch circuit.<br />
Table 1.C Input Power Conditions<br />
Input Power Condition Corrective Action<br />
Low Line Impedance (less than 1% line reactance) • Install Line Reactor (1)<br />
Greater than 120 kVA supply transformer<br />
• or Isolation Transformer<br />
Line has power factor correction capacitors<br />
Line has frequent power interruptions<br />
Three-Phase<br />
AC Input<br />
Line has intermittent noise spikes in excess of<br />
6000V (lightning)<br />
Phase to ground voltage exceeds 125% of normal<br />
line to line voltage<br />
Ungrounded distribution system<br />
R/L1<br />
S/L2<br />
T/L3<br />
(1) Refer to Appendix B for accessory ordering information.<br />
Jumper<br />
1 2 3 4<br />
• Remove MOV jumper to ground.<br />
• or Install Isolation Transformer<br />
with grounded secondary if<br />
necessary.
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