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

Safety

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 Qualified Personnel

Only qualified personnel are allowed to install or 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 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 qualified personnel to install, start up, and
maintain the drive can result in death or serious injury.
•
Only qualified personnel must install, start up,
and maintain the drive.
MG38C202
Design Guide
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 for the specified
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.
2.
3.
4.
5.
Voltage
380–500 90–250 kW
380–500 315–500 kW
525–690 55–315 kW
525–690 355–710 kW
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.
•
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.
Danfoss A/S © 01/2018 All rights reserved.
Stop the motor.
Disconnect AC mains and remote DC-link
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
Disconnect or lock motor.
Wait for the capacitors to discharge fully. Refer
to Table 2.1.
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
Power rating Enclosure
(normal overload)
D1h–D8h
125–350 hp
E1h–E4h
450–650 hp
D1h–D8h
60–350 hp
E1h–E4h
400–750 hp
Ensure the correct grounding of the equipment
by a certified electrical installer.
2
Minutes to disharge
20
40
20
40
5
2