Safety And Conformity; Safety - Danfoss VLT FC51 Design Manual

Safety and Conformity

2 Safety and Conformity

2.1 Safety

The following symbols are used in this document:
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE
Indicates important information, including situations that
may result in damage to equipment or property.
2.1.1 Safety Precautions
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Failure to perform
installation, start-up, and maintenance by qualified
personnel could result in death or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time, causing risk of death,
serious injury, equipment, or property damage. The
motor can start by means of an external switch, a serial
bus command, an input reference signal from the LCP or
LOP, via remote operation using MCT 10 software, or
after a cleared fault condition.
•
Disconnect the frequency converter from mains
whenever personal safety considerations make
it necessary to avoid unintended motor start.
•
Press [Off/Reset] on the LCP, before
programming parameters.
•
The frequency converter, motor, and any driven
equipment must be in operational readiness
when the frequency converter is connected to
AC mains.
®
VLT Micro Drive FC 51 Design Guide
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter 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.
2.
3.
M1, M2 and M3
M4 and M5
Table 2.1 Discharge Time
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
frequency converter properly could result in death or
serious injury.
•
WARNING
EQUIPMENT HAZARD
Contact with rotating shafts and electrical equipment
can result in death or serious injury.
•
•
•
MG02K302 - Rev. 2013-12-03
Stop motor.
Disconnect AC mains, permanent magnet type
motors, and remote DC-link power supplies,
including battery back-ups, UPS, and DC-link
connections to other frequency converters.
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.
Size Minimum waiting time (min)
Ensure correct grounding of the equipment by
a certified electrical installer.
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.
2
4
15
9
2