Safety; Qualified Personnel; Safety Precautions - Danfoss VLT FC 103 Operating Instructions Manual

Safety

2 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 can also be used to
alert against unsafe practices.
NOTICE
Indicates important information, including situations that
can result in damage to equipment or property.

2.1 Qualified Personnel

Correct and reliable transport, storage, installation,
operation, and maintenance are required for the trouble-
free and safe operation of the frequency converter. Only
qualified personnel are allowed to install or operate this
equipment.
Qualified personnel are defined as trained staff, who are
authorised to install, commission, and maintain equipment,
systems, and circuits in accordance with pertinent laws and
regulations. Additionally, the personnel must be familiar
with the instructions and safety measures described in this
document.

2.2 Safety Precautions

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC power supply, or load
sharing. Failure to perform installation, start-up, and
maintenance by qualified personnel can result in death
or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
MG16J202
Operating Instructions
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
or DC power supply, the motor may start at any time.
Unintended start during programming, service or repair
work can result in death, serious injury, 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 after a cleared fault condition.
To prevent unintended motor start:
•
•
•
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.
•
•
•
Voltage [V]
380-480
525-690
High voltage may be present even when the warning LED
indicator lights are off.
Table 2.1 Discharge Time
Danfoss A/S © Rev. 05/2014 All rights reserved.
Disconnect the frequency converter from mains.
Press [Off/Reset] on the LCP, before
programming parameters.
The frequency converter, motor, and any driven
equipment must be fully wired and assembled
when the frequency converter is connected to
AC mains, or DC power supply.
Stop the motor.
Disconnect the 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.
Minimum waiting time (minutes)
20
110-315 kW
55-400 kW
2 2
40
355-450 kW
450-630 kW
9