Xylem hydrovar, Installation, Operation And Maintenance Manual

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6 Electrical Installation
6.1 Precautions
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. Failure to
follow these guidelines could result in death or serious injury.
Electrical Hazard:
• All electrical wiring must be carried out by an authorized electrician, in accordance
with the electrical regulations locally in force.
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 requirement:
• 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.
Earth (grounding) requirements
WARNING:
For operator safety, it is important to ground the frequency converter properly in
accordance with national and local electrical codes as well as instructions contained within
this document. Ground currents are higher than 3.5 mA. Failure to ground the frequency
converter properly could result in death or serious injury.
NOTICE:
It is the responsibility of the user or certified electrical installer to ensure correct
grounding (earthing) of the equipment in accordance with national and local electrical
codes and standards.
• Follow all local and national electrical codes to ground electrical equipment properly.
• Proper protective grounding for equipment with ground currents higher the 3.5 mA
must be established. See the Leakage current (>3.5 mA) section for details.
• A dedicated ground wire is required for input power, motor power and control wiring.
• Use the clamps provided with the equipment for proper ground connections.
• Do not ground one frequency converter to another in a “daisy chain” fashion.
• Keep the ground wire connections as short as possible.
• Using high-strand wire to reduce electrical noise is recommended.
• Follow motor manufacturer wiring requirements.
Leakage current (>3.5 mA)
Follow national and local codes regarding protective earthing of equipment with a
leakage current > 3.5 mA. Frequency converter technology implies high frequency
switching at high power. This will generate a leakage current in the earth connection. A
fault current in the frequency converter at the output power terminals might contain a DC
component which can charge the filter capacitors and cause a transient earth current. The
6 Electrical Installation
26 HVL 2.015-4.220 Installation, Operation, and Maintenance Manual