Installation guide

Powering Up the System 6-5

1. Check that the receptacle provided is correct. This should have been

done during site preparation.

2. Using a voltmeter, measure the voltages between all three phases and

each phase to neutral (see Figure 6-2). Verify that the voltages are

within the range specified in Table 6-1. If the voltages are out of

range, contact an electrician.

3. Plug the power cord into the receptacle.

Table 6-1 AC Input Voltage Specifications

NOTE: In some installations, power regulators must be balanced so the AC

power distribution system will not be overloaded. Balancing

means connecting AC power so that the loads from the regulators

are evenly distributed among the AC phases. This ensures that any

one phase does not draw excessive power. There are three slots for

power regulators, with each slot representing a phase. Power regu-

lators may be moved to different slots to balance the load among

AC phases.

Voltage

Measurement

208V

Nominal

202V

Nominal

380V

Nominal

415V

Nominal

phase–phase

180–220V 180–220V 331–407V 360–443V

phase–neutral

104–128V None 190–235V 208–256V

For more information:

Site Preparation Guide

C C