Requirements; Grounding Requirements - GE AF-650 GP Design And Installation Manual
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Installation
2.5.1 Requirements
WARNING
EQUIPMENT HAZARD!
2
2
Rotating shafts and electrical equipment can be
hazardous. All electrical work must conform to national
and local electrical codes. It is recommended that instal-
lation, start up, and maintenance is 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 overload protection. See
chapter 10 Warnings and Alarms for details on the
trip function.
•
Because the motor wiring carries high frequency
current, it is important that wiring for mains,
motor power, and control are run separately. Use
metallic conduit or separated shielded wire.
Failure to isolate power, motor, and control wiring
could result in less than optimum equipment
performance.
•
All frequency converters must be provided with
short circuit and overcurrent protection. Input
fusing is required to provide this protection, see
Illustration 2.6. Fuses must be provided by the
installer as part of installation. See maximum fuse
ratings in chapter 13.3 Fuse Specifications.
20
1
Fuses
2
Ground
Illustration 2.6 Frequency Converter Fuses
Wire type and ratings
•
All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
•
GE recommends that all power connections be
made with a minimum 75 °C rated copper wire.
•
See for recommended wire sizes.
2.5.2 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 and instructions contained
within these instructions. 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 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 than 3.5 mA must be
established, see chapter 2.5.2.1 Leakage Current
(>3.5 mA).
•
A dedicated ground wire is required for input
power, motor power, and control wiring.
DET-767c All rights reserved.
MG35M402
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