Product Overview; Safety - Danfoss VLT Compressor Drive CDS 803 Design Manual

Product Overview

2 Product Overview

2.1 Safety

2.1.1 Safety Precautions
Safety regulations
•
Disconnect the frequency converter from mains,
before carrying out repair work. Check that the
mains supply has been disconnected and that the
necessary time has passed before removing
compressor and mains plugs.
•
The [Off/Reset] key does not disconnect the
equipment from mains and is thus not to be used
as a safety switch.
•
Establish correct protective earthing of the
equipment, protect the user against supply
voltage, and protect the compressor against
overload in accordance with applicable national
and local regulations.
•
The ground leakage currents are higher than 3.5
mA.
•
Set protection against motor overload in
parameter 1-90 Motor Thermal Protection. If this
function is desired, set parameter 1-90 Motor
Thermal Protection to data value [4], [6], [8], [10]
ETR trip or data value [3], [5], [7], [9] ETR warning.
NOTICE
The function is initialized 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.
•
Do not remove the plugs for the compressor 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 elapsed before removing compressor
and mains plugs.
•
Check that all voltage inputs have been discon-
nected and that the necessary time has elapsed
before commencing repair work.
Installation at high altitudes
CAUTION
At altitudes above 2000 m (6561 ft), contact Danfoss
regarding PELV.
MG18N202
Design Guide
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Qualified personnel
only should perform installation, start up, and
maintenance. Failure to perform installation, start up,
and maintenance by qualified personnel could result in
death or serious injury.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time. The frequency
converter, motor, and any driven equipment must be in
operational readiness. Failure to be in operational
readiness when the frequency converter is connected to
AC mains could result in death, serious injury,
equipment, or property damage.
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter is not powered. High voltage can be present
even when the warning LED indicator lights are off.
Failure to wait the specified time after power has been
removed before performing service or repair work can
result in death or serious injury.
•
•
•
•
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Danfoss A/S © 12/2015 All rights reserved.
Stop the motor.
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other frequency
converters.
Disconnect or lock PM motor.
Wait for the capacitors to discharge fully. The
minimum duration of waiting time is specified
in Table 2.1.
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
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