2 Safety
2.1 Qualified Personnel
Correct and reliable transport, storage, installation, operation, and maintenance are required for the trouble-free and safe operation of
the drive. Only qualified personnel are allowed to install and operate this equipment.
Qualified personnel are defined as trained staff, who are authorized to install, commission, and maintain equipment, systems, and
circuits in accordance with pertinent laws and regulations. Also, the qualified personnel must be familiar with the instructions and
safety measures described in this manual.
2.2 Safety Precautions
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 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 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 1: Discharge Time
Minimum waiting time (minutes)
4
7
15
20
30
40
200–240 V
0.25–3.7 kW
(0.34–5 hp)
–
5.5–37 kW
(7.5–50 hp)
–
–
–
380–500 V
0.25–7.5 kW
(0.34–10 hp)
–
11–75 kW
(15–100 hp)
90–200 kW
(150–350 hp)
250–500 kW
(450–750 hp)
250–800 kW
(450–1350 hp)
315–500 kW
(500–750 hp)
400 V
–
–
–
90–315 kW
(125–450 hp)
–
–
500 V
–
–
–
110–355 kW
(150–450 hp)
–
–
Safety
Installation Guide | 1000 Hz Control Card MK-I
AN281754171207en-000101 / 130R0878
2 | Danfoss A/S © 2018.11
