Danfoss VLT CDS 803 Manual page 10

VLT® Compressor Drive CDS 803
Design Guide
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 indicator lights are off.
Failure to wait the specified time after power has been removed before performing service or repair work could result in death or
serious injury.
-
Stop the motor.
-
Disconnect AC mains, permanent magnet type motors, and remote DC-link supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
-
Wait for the capacitors to discharge fully. The minimum waiting time is specified in the table Discharge time and is also visible
on the nameplate on the top of the drive.
-
Before performing any service or repair work, use an appropriate voltage measuring device to make sure that the capacitors
are fully discharged.
Table 2: Discharge Time
Voltage [V] Power range [kW (hp)]
3x200 6.0–10 (8.0–15)
3x400 6.0–7.5 (8.0–10)
3x400 10–30 (15–40)
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the drive properly can result in death or serious injury.
-
Ensure that the minimum size of the ground conductor complies with the local safety regulations for high touch current
equipment.
EQUIPMENT HAZARD
Contact with rotating shafts and electrical equipment can result in death or serious injury.
-
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.
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive is not properly closed.
-
Ensure that all safety covers are in place and securely fastened before applying power.
10 | Danfoss A/S © 2021.05
W A R N I N G
Minimum waiting time (minutes)
15
4
15
W A R N I N G
W A R N I N G
C A U T I O N
Safety
AJ330233902305en-000201 / 130R0596