Table of Contents
Advertisement
Installation
3.4 Electrical Installation
WARNING
EQUIPMENT HAZARD!
Rotating shafts and electrical equipment can be hazardous.
It is strongly recommended that all electrical work conform
to all national and local regulations. Installation, start-up
and maintenance should be performed only by qualified
personnel. Failure to follow local regulations could result in
death or serious injury.
•
Motor control equipment and electronic controls
are connected to hazardous line voltages.
Extreme care should be taken to protect against
electrical hazard.
•
Correct protective grounding of the equipment
must be established. Ground currents are higher
than 3mA.
•
A dedicated ground wire is required.
•
Wear safety glasses whenever working on electric
control or rotating equipment.
NOTE!
Make all power connections with a minimum of 60°C/
140°F rated copper wire.
WARNING
INDUCED VOLTAGE!
Run output motor cables from multiple drives separately.
Induced voltage from output motor cables run together
can charge equipment capacitors even with the equipment
turned off and locked out. Failure to run output motor
cables separately could result in death or serious injury.
NOTE!
Run input power, motor wiring and control wiring in three
separate metallic conduits or raceways for high frequency
noise isolation. Failure to isolate power, motor and control
wiring could result in less than optimum drive and
associated equipment performance.
•
Because the motor wiring carries high frequency
electrical pulses, it is important that no other
wires are run together. If the incoming power
wiring is run in the same conduit as the motor
wiring, these pulses can couple electrical noise
back onto the building power grid.
At least three separate conduits must be connected to the
panel (Figure 3.4).
Vertical Bypass/Non Bypass Panel
Control wiring should always be isolated from the high
voltage power wiring.
Avoid getting metal chips into electronics.
Follow the connection procedures as illustrated in the
drawing provided with the unit.
Figure 3.4 Power Connections
®
MG.13.A1.22 - VLT
is a registered Danfoss trademark
•
Power into the panel (and ground back to the
distribution panel)
•
Power from the panel to the motor and earth
insulated motor ground
•
Control wiring
Stop
Start
Line Power
Speed
Control
3
3
Motor
3-7
Advertisement
Table of Contents
