Bell & Gossett P2001487 Technologic Pump Controller - Manual (Page 15)

2.4.1 Requirements
WARNING
EQUIPMENT HAZARD!
Rotating shafts and electrical equipment can be
hazardous. All electrical work must conform to national
and local electrical codes. It is strongly recommended
that installation, start up, and maintenance be
performed only by trained and qualified personnel.
Failure to follow these guidelines could result in death or
serious injury.
CAUTION
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 controls 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 cables from multiple frequency
converters separately. Induced voltage from
output motor cables run together can charge
equipment capacitors even with the equipment
turned off and locked out.
Overload and Equipment Protection
• An electronically activated function within the
frequency converter provides overload protection
for 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
8 Warnings and Alarms 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, see
Illustration 2.6. If not factory supplied, fuses must
be provided by the installer as part of instal-
lationinstallation. See maximum fuse ratings in
10.3 Fuse Specifications.
Illustration 2.6 Frequency Converter Fuses
Item
#
Description
1 Fuses
2 Ground
Table 2.4 Legend to Illustration 2.6
Wire Type and Ratings
• All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
• Xylem recommends that all power connections
be made with a minimum 75
°C rated copper
wire.
• See 10.1 Power-dependent Specifications for
recommended wire sizes.
2.4.2 Earth (Grounding) Requirements
WARNING
GROUNDING HAZARD!
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.
NOTE
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.
Installation
12
2 2