Danfoss VLT 2800 Manual

DANGER
!
Rotating shafts and electrical equipment
can be hazardous. Therefore, it is strongly
recommended that all electrical work
conform to National Electrical Code
(NEC) and all local regulations.
Installation, start-up and maintenance
should be performed only by qualified
personnel.
Factory recommended procedures, included in this manual,
should be followed. Always disconnect electrical power before
working on the unit.
Although shaft couplings or belt drives are generally not
furnished by the manufacturer, rotating shafts, couplings and
belts must be protected with securely mounted metal guards that
are of sufficient thickness to provide protection against flying
particles such as keys, bolts and coupling parts. Even when the
motor is stopped, it should be considered “alive” as long as its
controller is energized. Automatic circuits may start the motor at
any time. Keep hands away from the output shaft until the motor
has completely stopped and power is disconnected from the
controller.
Motor control equipment and electronic controls are connected
to hazardous line voltages. When servicing drives and
electronic controls, there will be exposed components at or
above line potential. Extreme care should be taken to protect
against shock. Stand on an insulating pad and make it a habit to
use only one hand when checking components. Always work
with another person in case of an emergency. Disconnect
power whenever possible to check controls or to perform
maintenance. Be sure equipment is properly grounded. Wear
safety glasses whenever working on electric control or rotating
equipment.
Touching electrical parts may be fatal – even after equipment
has been disconnected from AC line. To be sure that capacitors
have fully discharged, wait 14 minutes after power has been
MG.90.C1.02 - VLT is a registered Danfoss trademark
VLT
Safety Guidelines
1.
2.
3.
4.
Warnings Against Unintended Start
1.
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3.
4.
The Electronic Thermal Relay (ETR) in UL listed VLTs provides
Class 20 motor overload protection in accordance with NEC in
single motor applications, when parameter 117 is set for “ETR
TRIP 1”, “ETR TRIP 2”, “ETR TRIP 3”, or “ETR TRIP 4”, and
parameter 105 is set for rated motor (nameplate) current.
DANGER
!
©Copyright 2001, Danfoss Graham
® 2800 Metasys N2
The drive must be disconnected from the AC line before
any service work is done.
The “Stop/Off” key on the local control panel of the drive
does not disconnect the equipment from the AC line and is
not to be used as a safety switch.
Correct protective grounding of the equipment must be
established. The user must be protected against supply
voltage and the motor must be protected against overload
in accordance with applicable national and local
regulations.
Ground currents are higher than 3 mA.
While the drive is connected to the AC line, the motor can
be brought to a stop by means of external switch closures,
serial bus commands or references. If personal safety
considerations make it necessary to ensure that no
unintended start occurs, these stops are not sufficient.
During programming of parameters, the motor may start.
Be certain that no one is in the area of the motor or driven
equipment when changing parameters.
A motor that has been stopped may start unexpectedly if
faults occur in the electronics of the drive, or if an overload,
a fault in the supply AC line or a fault in the motor
connection or other fault clears.
If the “Local/Hand” key is activated, the motor can only be
brought to a stop by means of the “Stop/Off” key or an
external safety interlock.
NOTE
It is responsibility of user or person
installing drive to provide proper
grounding and branch circuit protection
for incoming power and motor overload
according to National Electrical Code
(NEC) and local codes.