Danfoss VLT FC Series, Руководство по обслуживанию

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WARNING
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain
charged even when the drive is not powered. High
voltage can be present even when the warning LED
indicator lights are off. Failure to wait the specified time
after power has been removed before performing service
or repair work can result in death or serious injury.
•
Stop the motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
•
Disconnect or lock the motor.
•
Disconnect any brake option.
•
Disconnect any regen/load share option.
•
Wait for the capacitors to discharge fully. The
minimum waiting time is specified in the
following discharge time table and is also
visible on the drive label.
•
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged. For parallel drive modules, measure
DC-bus capacitor voltages before and after the
individual DC fuses.
Enclosure Size Minimum waiting time
D1h–D8h drives 20 minutes
J8–J9 drives 20 minutes
D9h–D10h enclosed drive systems 20 minutes
Da2/Da4/Db2/Db4 parallel drive systems 20 minutes
E1h–E4h drives
40 minutes
E5h–E6h enclosed drive systems 40 minutes
Table 2.1 Discharge Time
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
drive properly can result in death or serious injury.
•
Ensure the correct grounding of the equipment
by a certified electrical installer.
WARNING
LOAD SHARE DISCONNECT
Load share is a connection between DC circuits of several
drives, creating a multiple-drive system to run a single
mechanical load. When servicing a drive that is part of a
load share application:
•
Turn off all drives in the system via a
disconnect.
•
Wait for the drives to discharge fully, using the
longest waiting period required of the drives in
the multi-drive system. Refer to the discharge
time table for minimum waiting time.
WARNING
EQUIPMENT HAZARD
Contact with rotating shafts and electrical equipment
can result in death or serious injury.
•
Ensure that only trained and qualified personnel
install, start up, and maintain the drive.
•
Ensure that electrical work conforms to national
and local electrical codes.
•
Follow the procedures in this guide.
WARNING
UNINTENDED MOTOR ROTATION
WINDMILLING
Unintended rotation of permanent magnet motors
creates voltage and can charge the unit, resulting in
death, serious injury, or equipment damage.
•
Ensure that permanent magnet motors are
blocked to prevent unintended rotation.
WARNING
SHOCK HAZARD AND RISK OF INJURY
For dynamic test procedures, mains input power is
required, and all devices and supplies connected to
mains are energized at rated voltage. Contact with
powered components can result in death or serious
injury.
•
Do not touch energized parts of the drive when
connected to mains.
Safety Service Guide
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