Specifications

Installation

F8429301 (EN)

Input Power Conditioning

The drive is suitable for direct connection to input

power within the rated voltage of the drive. Listed in

Table 9

are certain input power conditions which may

cause component damage or reduction in product life.

If any of the conditions exist, install one of the devices

listed under the Corrective Action.

IMPORTANT: Only one device per branch circuit

is required. It should be mounted closest to the

branch and sized to handle the total current of the

branch circuit.

Input Power Condition Possible Corrective Action(s)

Low Line impedance (less than 1% line reactance)

 Install Line Reactor

 Isolation Transformer

Greater than 120 kVA supply transformer

Line has power factor correction capacitors

 Install Line Reactor

 Isolation Transformer

Line has frequent power interruptions

Line has intermittent noise spikes in excess of 6000V (lightning)

Phase to ground voltage exceeds 125% of normal line to line voltage

 Remove MOV jumper to ground

 Install Isolation Transformer with grounded

secondary (if necessary)

Ungrounded distribution system

240V open delta configuration (stinger leg)*

 Install Line Reactor

* For drives applied on an open delta with a middle phase grounded neutral system, the phase opposite the phase that is tapped in the middle

to the neutral or earth is referred to as the “stinger leg,” “high leg,” “red leg,” etc. This leg should be identified throughout the system with

red or orange tape on the wire at each connection point. The stinger leg should be connected to the center Phase B on the reactor.

Table 9