Danfoss vlt fcd 302, Руководство по конструкции

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Built-in DC coils in the DC link ensure a high power factor
and reduce the THD on the main supply.
1.1.2 Symbols
The following symbols are used in this manual.
WARNING
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may
also be used to alert against unsafe practices.
CAUTION
Indicates a situation that may result in equipment or
property-damage-only accidents.
NOTE
Indicates highlighted information that should be regarded
with attention to avoid mistakes or operate equipment at
less than optimal performance.
*
Indicates default setting
1.2 Safety Precautions
WARNING
The voltage of the frequency converter is dangerous
whenever connected to mains. Correct planning of the
installation of the motor, frequency converter and fieldbus
is necessary. Follow the instructions in this manual, as well
as national and local rules and safety regulations. Failure to
follow design recommendations could result in death,
serious personal injury or damage to the equipment once
in operation.
WARNING
High Voltage
Touching the electrical parts may be fatal - even after the
equipment has been disconnected from mains.
In planning, ensure that other voltage inputs can be
disconnected, such as external 24 V DC, load sharing
(linkage of DC intermediate circuit), as well as the motor
connection for kinetic back up.
Systems where frequency converters are installed must, if
necessary, be equipped with additional monitoring and
protective devices according to the valid safety regulations,
e.g law on mechanical tools, regulations for the prevention
of accidents etc. Modifications on the frequency converters
by means of the operating software are allowed.
Failure to follow design recommendations, could result in
death or serious injury once the equipment is operation.
NOTE
Hazardous situations shall be identified by the machine
builder/integrator who is responsible for taking necessary
preventive means into consideration. Additional
monitoring and protective devices may be included, always
according to valid national safety regulations, e.g. law on
mechanical tools, regulations for the prevention of
accidents.
NOTE
Crane, Lifts and Hoists:
The controlling of external brakes must always be
designed with a redundant system. The frequency
converter can in no circumstances be the primary safety
circuit. Comply with relevant standards, e.g.
Hoists and cranes: IEC 60204-32
Lifts: EN 81
Protection Mode
Once a hardware limit on motor current or DC link voltage
is exceeded the frequency converter enters “Protection
mode”. “Protection mode” means a change of the PWM
modulation strategy and a low switching frequency to
minimize losses. This continues 10 s after the last fault and
increases the reliability and the robustness of the
frequency converter while re-establishing full control of the
motor.
In hoist applications “Protection mode” is not usable
because the frequency converter will usually not be able to
leave this mode again and therefore it will extend the time
before activating the brake – which is not recommendable.
The “Protection mode” can be disabled by setting
14-26 Trip Delay at Inverter Fault to zero which means that
the frequency converter will trip immediately if one of the
hardware limits is exceeded.
Introduction
VLT
®
Decentral Drive FCD 302
8 MG04H102 - VLT
®
is a registered Danfoss trademark
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