Avoid Unintended Start; Safe Stop Of The Frequency Converter - Danfoss VLT Aqua Drive FC 202 Operating Instructions Manual

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VLT AQUA Drive
Operating Instructions
Consult the relevant clauses in these instructions and in the
for information about the electrical ratings.
Installation requirements:
The overall electrical safety of the frequency converter requires special installation
considerations regarding:
•
•
•
•
Consult the relevant clauses in these instructions and in the
for information about the installation requirements.
2.1.5. Caution
Voltage
200 - 240 V
380 - 480 V
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.

2.1.6. Avoid unintended Start

While the frequency converter is connected to mains, the motor can be started/stop-
ped using digital commands, bus commands, references or via the Local Control
Panel.
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•
•

2.1.7. Safe Stop of the Frequency Converter

For versions fitted with a Safe Stop terminal 37 input, the frequency converter can perform the
safety function
defined in EN 60204-1).
It is designed and approved suitable for the requirements of Safety Category 3 in EN 954-1. This
functionality is called Safe Stop. Prior to integration and use of Safe Stop in an installation, a
thorough risk analysis on the installation must be carried out in order to determine whether the
Safe Stop functionality and safety category are appropriate and sufficient. In order to install and
use the Safe Stop function in accordance with the requirements of Safety Category 3 in EN 954-1,
the related information and instructions of the VLT AQUA Drive Design Guide MG.20.NX.YY must
Fuses and circuit breakers for over-current and short-circuit protection
Selection of power cables (mains, motor, brake, loadsharing and relay)
Grid configuration (IT,TN, grounded leg, etc.)
Safety of low-voltage ports (PELV conditions).
The frequency converter's DC link capacitors remain charged after power has been
disconnected. To avoid an electrical shock hazard, disconnect the frequency con-
verter from the mains before carrying out maintenance. Wait at least as follows
before doing service on the frequency converter:
Disconnect the frequency converter from mains whenever personal safety considerations
make it necessary to avoid unintended start.
To avoid unintended start, always activate the [OFF] key before changing parameters.
Unless terminal 37 is turned off, an electronic fault, temporary overload, a fault in the
mains supply, or lost motor connection may cause a stopped motor to start.
Safe Torque Off
(As defined by draft CD IEC 61800-5-2) or
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MG.20.M2.02 - VLT is a registered Danfoss trademark
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VLT
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VLT
Min. Waiting Time
4 min.
0.25 - 3.7 kW
0.37 - 7.5 kW
2. Safety
AQUA Drive Design Guide
AQUA Drive Design Guide
15 min.
5.5 - 45 kW
11 - 90 kW
Stop Category 0
(as
2
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