Avoid Unintended Start - Danfoss VLT AQUA Drive FC 200 Instruction Manual

VLT AQUA High Power Instruction Manual
The adjustable frequency drives also support other special applications, which affect
the electrical ratings of the adjustable frequency drive. Special conditions that affect
the electrical ratings might be:
•
•
•
Consult the relevant clauses in these instructions and in the
for information about the electrical ratings.
Installation requirements:
The overall electrical safety of the adjustable frequency drive requires special instal-
lation considerations regarding:
•
•
•
•
Consult the relevant clauses in these instructions and in the
for information about the installation requirements.
2.1.5. Caution
Voltage
380-480 V
525-690 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 adjustable frequency drive is connected to line power, the motor can be
started/stopped using digital commands, bus commands, references or via the Local
Control Panel.
•
•
•
Single phase applications.
High temperature applications which require derating of the electrical ratings
Marine applications with more severe environmental conditions.
Fuses and circuit breakers for overcurrent and short-circuit protection
Selection of power cables (line power, motor, brake, load sharing and relay)
Grid configuration (IT,TN, grounded leg, etc.)
Safety of low-voltage ports (PELV conditions).
The adjustable frequency drive DC link capacitors remain charged after power has
been disconnected. To avoid the risk of electrical shock, disconnect the adjustable
frequency drive from the line power before performing maintenance procedures.
Wait at least as long as follows before servicing the adjustable frequency drive:
150-600 hp [110-450 kW]
Disconnect the adjustable frequency drive from line power whenever personal safety
considerations make it necessary to avoid an unintended start.
To avoid an 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
line supply or lost motor connection may cause a stopped motor to start.
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MG.20.P1.22 - VLT is a registered Danfoss trademark.
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VLT AQUA Drive Design Guide
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VLT AQUA Drive Design Guide
Min. Waiting Time
15 min.
175-850 hp [132-630 kW]
2. Safety
20 min.
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