Danfoss VLT AutomationDrive FC 301 Series Design Manual page 16

Safety
WARNING
2 2
DISCHARGE TIME
The adjustable frequency drive contains DC link
capacitors which can remain charged even when the
adjustable frequency drive is not powered. Failure to
wait the specified time after power has been removed
before performing service or repair work could result in
death or serious injury.
1. Stop motor.
2. Disconnect AC line power, permanent magnet
type motors, and remote DC link power
supplies, including battery backups, UPS, and
DC link connections to other adjustable
frequency drives.
3. Wait for the capacitors to discharge fully before
performing any service or repair work. The
duration of waiting time is specified in
Table 2.1.
Voltage [V]
200–240
380–500
525–600
525–690
High voltage may be present even when the warning LED
indicator lights are off.
Table 2.1 Discharge Time
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
adjustable frequency drive properly could result in death
or serious injury.
•
Ensure correct grounding of the equipment by
a certified electrical installer.
14
Minimum waiting time (minutes)
4 7
0.34–5 hp
[0.25–3.7 kW]
0.34–10 hp
[0.25–7.5 kW]
1–10 hp
[0.75–7.5 kW]
2–10 hp
[1.5–7.5 kW]
Design Guide
WARNING
EQUIPMENT HAZARD
Contact with rotating shafts and electrical equipment
can result in death or serious injury.
•
•
•
CAUTION
WINDMILLING
Unintended rotation of permanent magnet motors
causes risk of personal injury and equipment damage.
•
CAUTION
15
POTENTIAL HAZARD IN THE EVENT OF INTERNAL
7.5–50 hp
FAILURE
[5.5–37 kW]
Risk of personal injury when the adjustable frequency
15–100 hp
drive is not properly closed.
[11–75 kW]
•
15–100 hp
[11–75 kW]
15–100 hp
[11–75 kW]
Rev. 2014-04-04 All rights reserved.
Ensure that only trained and qualified
personnel perform installation, start-up, and
maintenance.
Ensure that electrical work conforms to national
and local electrical codes.
Follow the procedures in this manual.
Ensure that permanent magnet motors are
blocked to prevent unintended rotation.
Before applying power, ensure all safety covers
are in place and securely fastened.
MG33BF22