Xylem IM043 AQUAVAR Variable Speed Pump Control - Manuel (Page 19)

Installation
18
Electrical Connections (Line Reactors)
Input Line Requirements
Line Voltage
See the Power and Current Ratings table for the allowable fluctuation of AC line voltage for your
particular model. A supply voltage above or below the limits given in the table will cause the
drive to trip with either an overvoltage or undervoltage fault.
To verify power quality, consult your local power utility for a chart recorder.
Exercise caution when applying the AQUAVAR controller on low-line conditions.
For example, and AQUAVAR controller will operate properly on a 208 Vac line – but the maximum
output voltage will be limited to 208 Vac. Now if a motor rated for 230 Vac line voltage is
controlled by this drive, higher motor currents and increased heating will result.
Therefore, ensure that the voltage rating of the motor matches the applied line voltage.
Use of Isolation Transformers and Line Reactors
The AQUAVAR controller is is perfectly suitable in most cases for direct connection to a power
source as specified in this manual and the technical nameplate affixed to the unit. There are
however a few cases where a properly sized isolation transformer or line reactor should be
employed to minimize the risk of drive malfunction, damage or nuisance tripping:
• As noted in Table 7, transformer sizing, when line capacity is greater than 10 times the KVA
rating of the drive. Consult the factory for assistance in sizing the line reactor.
• When power factor correction capacitors are employed on the drive’s power source.
• When the power source is known to be subject to transient power interruptions or
significant voltage spikes.
• When the power source supplying the drive also supplies large devices such as DC drives
that contain controller rectifiers.
• When power quality or known transient voltage spikes is suspected or questioned.
Table 7: Transformer Sizing for the AQUAVAR Controller
Controller HP 1 2 3 5 7.5 10 15 20 25 30 40 50 60 75
Transformer kVA 2 4 5 9 13 18 23 28 36 42 56 70 90 112
* Consult factory for more information, if needed.
DO NOT USE PHASE CONVERTERS OR “OPEN DELTA” POWER SUPPLIES ON THE
AQUAVAR INPUT. NUISANCE TRIPPING OR PERMANENT DAMAGE WILL OCCUR.
CAUTION