Xylem Aquavar, Instruction Manual

Page: 42 / 172

5 Electrical Installation
5.1 Precautions
Electrical Hazard:
• Branch circuit protection required. Provide branch circuit protection in accordance
with the National Electrical Code.
• Motor control equipment and electronic controls are connected to hazardous line
voltages. Extreme care should be taken to protect against electrical hazard.
• Proper protective grounding of the equipment must be established. Ground currents
are higher than 3 mA.
• A dedicated ground wire is required.
WARNING:
• EQUIPMENT HAZARD. Rotating shafts and electrical equipment can be hazardous. All
electrical work must conform to national and local electrical codes. Installation, start-
up, and maintenance must be performed by trained and qualified personnel. Wear
safety glasses whenever working on electric control or rotating equipment. Failure to
follow these guidelines could result in death or serious injury.
• FIRE HAZARD. Consult the Brake Design Guide IM257 for details on proper installation
of a brake resistor.
NOTICE:
WIRING ISOLATION. Run input power, motor wiring and control wiring in three separate
metallic conduits or use separated shielded cable for high frequency noise isolation.
Failure to isolate power, motor and control wiring could result in less than optimum
frequency converter and associated equipment performance.
For your safety comply with the following requirements:
• Electronic control equipment is connected to hazardous mains voltage. Extreme care
should be taken to protect against electrical hazards when applying power to the unit.
• Run motor cable from multiple frequency converters separately. Induced voltage can
charge equipment capacitors even with the equipment turned off and locked.
• Field wiring terminals are not intended to receive a conductor one size larger.
Overload and equipment protection:
• An electronically activated function within the frequency converter provides overload
protection in the motor. The overload calculates the level of increase to activate timing
for the trip (controller output stop) function. The higher the current draw, the quicker
the trip response. The overload provides Class 20 motor protection. See Warnings and
alarms section for details on the trip function.
• All frequency converters must be provided with short-circuit and over-current
protection. Input fusing is required to provide this protection. If not factory supplied,
fuses must be provided by the installer as part of installations. See Fuse specifications
section for details.
Wire type and ratings:
• All wiring must comply with local and national regulations regarding cross section and
ambient temperature requirements.
• It is recommended the all power connections be made with a minimum 75°C rated
copper wire.
• See Power-dependent specifications section for recommended wire sizes.
5 Electrical Installation
40 Aquavar ® Intelligent Pump Controller - 150 HP to 600 HP INSTRUCTION MANUAL