Danfoss VLT AutomationDrive FC 302 - 2 Safety; Safety Symbols; Qualified Personnel; Safety Precautions

2 Safety
2.1 Safety Symbols
The following symbols are used in this guide:
WARNING
Indicates a potentially hazardous situation that could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that could
result in minor or moderate injury. It can also be used to
alert against unsafe practices.
NOTICE
Indicates important information, including situations that
can result in damage to equipment or property.
2.2 Qualied Personnel
Only qualied personnel are allowed to install or operate
this equipment.
Qualied personnel are dened as trained sta, who are
authorized to install, commission, and maintain equipment,
systems, and circuits in accordance with pertinent laws and
regulations. Also, the personnel must be familiar with the
instructions and safety measures described in this manual.
2.3
Safety Precautions
WARNING
HIGH VOLTAGE
Drives contain high voltage when connected to AC mains
input, DC supply, load sharing, or permanent motors.
Failure to use qualied personnel to install, start up, and
maintain the drive can result in death or serious injury.
•
Only qualied personnel must install, start up,
and maintain the drive.
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 o. Failure to wait for the specied
amount of time listed in Table 2.1 after power has been
removed before performing service or repair work can
result in death or serious injury.
1. Stop the motor.
2. Disconnect AC mains and remote DC-link
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
3. Disconnect or lock motor.
4. Wait for the capacitors to discharge fully. Refer
to Table 2.1.
5. Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
Voltage Power rating
(normal overload)
Enclosure Minutes to disharge
380–500 90–250 kW
125–350 hp
D1h–D8h 20
380–500 315–500 kW
450–650 hp
E1h–E4h 40
525–690 55–315 kW
60–350 hp
D1h–D8h 20
525–690 355–710 kW
400–750 hp
E1h–E4h 40
Table 2.1 Discharge Time for Enclosures D1h–D8h and E1h–E4h
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 certied electrical installer.
NOTICE
MAINS SHIELD SAFETY OPTION
A mains shield option is available for enclosures with a
protection rating of IP21/IP54 (Type 1/Type 12). The
mains shield is a cover installed inside the enclosure to
protect against the accidental touch of the power
terminals, according to BGV A2, VBG 4.
Safety Design Guide
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