Xylem Aquavar, Instruction Manual

Page: 55 / 172

Output junction box requirements
The length, minimum 8 ft (2.5 m), and quantity of cables must be equal from each inverter
module to the common terminal in the junction box.
• NOTE: If the retrofit application requires unequal amounts of wires per phase, consult
the factory for requirements and documentation or use the top/bottom entry side
cabinet option.
5.10 Shielding against electrical noise
Before mounting the line power cable, mount the EMC metal cover to ensure best EMC
performance.
• NOTE: The EMC metal cover is only included in units with a H2–RFI Class A2 filter for
all D and E frame units.
Figure 63: EMC shield
5.11 AC line input connections
The line power supply must be connected to terminals 91, 92 and 93. Ground is
connected to the terminal to the right of terminal 93.
Terminal number Function
91, 92, 93 Line power R/L1, S/L2, T/L3
94 Ground
NOTICE:
Check the nameplate to ensure that the AC line voltage of the adjustable frequency drive
matches the power supply of your plant. Ensure that the power supply can supply the
necessary current to the adjustable frequency drive. If the unit is without built-in fuses,
ensure that the appropriate fuses have the correct current rating.
• All frequency converters may be used with an isolated input source as well as with
ground reference power lines. When supplied from an isolated mains source (IT mains
or floating delta) or TT/TN-S mains with a grounded leg (grounded delta), set 14–50
RFI Filter to (0) Off. When off, the internal RFI filter capacitors between the chassis and
the intermediate circuit are isolated. Isolating the capacitors prevents damage to the
intermediate circuit and reduces ground capacity currents in accordance with IEC
61800–3.
• Size wiring is based upon the input current of the frequency converter.
• Comply with local and national electrical codes for cable sizes.
5 Electrical Installation
Aquavar ® Intelligent Pump Controller - 150 HP to 600 HP INSTRUCTION MANUAL 53