WARNING
High Voltage
Touching the electrical parts may be fatal - even after
the equipment has been disconnected from mains.
Also make sure that other voltage inputs have been
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.
NOTICE
Hazardous situations shall be identified by the machine
builder/integrator who is responsible for considering
necessary preventive measures. Additional monitoring
and protective devices may be included, always
according to valid national safety regulations, for
example law on mechanical tools, regulations for the
prevention of accidents.
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
minimise 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.
Introduction
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03/2016 All rights reserved.
DET-620D
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