Danfoss VLT AutomationDrive FC 300 Programming Manual page 10

FC 300 Programming Guide
3. The equipment must be properly earthed, the user must be protected against supply voltage and the motor must be protected against overload
in accordance with applicable national and local regulations.
4. The earth leakage current exceeds 3.5 mA.
5. Protection against motor overload is not included in the factory setting. If this function is desired, set par. 1-90
data value ETR trip 1 [4] or data value ETR warning 1 [3].
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 elapsed before removing motor and mains plugs.
7. Please note that the frequency converter has more voltage sources than L1, L2 and L3, when load sharing (linking of DC intermediate circuit)
or external 24 V DC are installed. Check that all voltage sources have been disconnected and that the necessary time has elapsed before
commencing repair work.
Warning against unintended start
1. The motor can be brought to a stop by means of digital commands, bus commands, references or a local stop, while the frequency converter
is connected to mains. If personal safety considerations (e.g. risk of personal injury caused by contact with moving machine parts following an
unintentional start) make it necessary to ensure that no unintended start occurs, these stop functions are not sufficient. In such cases the mains
supply must be disconnected or the
2. The motor may start while setting the parameters. If this means that personal safety may be compromised (e.g. personal injury caused by
contact with moving machine parts), motor starting must be prevented, for instance by use of the
of the motor connection.
3. A motor that has been stopped with the mains supply connected, may start if faults occur in the electronics of the frequency converter, through
temporary overload or if a fault in the power supply grid or motor connection is remedied. If unintended start must be prevented for personal
safety reasons (e.g. risk of injury caused by contact with moving machine parts), the normal stop functions of the frequency converter are not
sufficient. In such cases the mains supply must be disconnected or the
NB!
When using the Safe Stop
Guide.
4. Control signals from, or internally within, the frequency converter may in rare cases be activated in error, be delayed or fail to occur entirely.
When used in situations where safety is critical, e.g. when controlling the electromagnetic brake function of a hoist application, these control
signals must not be relied on exclusively.
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.
NB!
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.
NB!
Crane, Lifts and Hoists:
The controlling of external brakes must always have 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
Safe Stop
function must be activated.
function, always follow the instructions in the
®
MG.33.M8.02 - VLT is a registered Danfoss trademark
Safe Stop
Safe Stop function must be activated.
Safe Stop section of the VLT AutomationDrive FC 300 Design
1 Introduction
Motor Thermal Protection
to
function or secure disconnection
1
9