Table of Contents
Advertisement
Safety
2 Safety
2
2
2.1 Safety Symbols
The following symbols are used in this document:
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE
Indicates important information, including situations that
may result in damage to equipment or property.
2.2 Qualified Personnel
Correct and reliable transport, storage, installation,
operation and maintenance are required for the trouble-
free and safe operation of the frequency converter. Only
qualified personnel is allowed to install or operate this
equipment.
Qualified personnel is defined as trained staff, who are
authorised to install, commission, and maintain equipment,
systems and circuits in accordance with pertinent laws and
regulations. Additionally, the personnel must be familiar
with the instructions and safety measures described in this
document.
2.3 Safety Precautions
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Failure to perform
installation, start-up, and maintenance by qualified
personnel could result in death or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
Safety regulations
1.
The frequency converter must be disconnected
from mains, if repair work is to be carried out.
Check that the mains supply has been discon-
nected and that the necessary time has passed
6
Operating Instructions
NOTICE
The function is initialised at 1.16 x rated motor current
and rated motor frequency. For the North American
market, the ETR functions provide class 20 motor
overload protection in accordance with NEC.
Danfoss A/S © Rev. 2014-03-06 All rights reserved.
before removing motor and mains plugs, see
Table 2.1.
2.
The [Off] key does not disconnect the equipment
from mains and is thus not to be used as a safety
switch.
3.
Establish correct protective earthing of the
equipment, protect the user against supply
voltage, and protect the motor against overload
in accordance with applicable national and local
regulations.
4.
The earth leakage currents are higher than 3.5
mA.
5.
Protection against motor overload is not included
in the factory setting. If this function is desired,
set 1-90 Motor Thermal Protection [4] ETR trip or
[3] ETR warning.
6.
Do not remove the plugs for the motor and
mains supply while the frequency converter is
connected to mains. Check that the mains supply
has been disconnected and that the necessary
time has passed before removing motor and
mains plugs, see Table 2.1.
7.
The frequency converter has more voltage inputs
than L1, L2 and L3, when load sharing (linking of
DC intermediate circuit) and external 24 V DC
have been installed. Check that all voltage inputs
have been disconnected and that the necessary
time has passed before commencing repair work,
see Table 2.1.
Warning against unintended start
1.
The motor can be brought to a stop with digital
commands, bus commands, references or a local
stop, while the frequency converter is connected
to mains. These stop functions are not sufficient
to prevent unintended starts.
2.
While parameters are being changed, the motor
may start. Consequently, always press [Off].
3.
A motor that has been stopped may start if faults
occur in the electronics of the frequency
converter, or if a temporary overload or a fault in
the supply mains or the motor connection ceases.
MG37E102
Advertisement
Table of Contents
