Introduction; Safety - Danfoss VLT AQUA Drive FC 202 Design Manual

Introduction

2 Introduction

2.1 Safety

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.
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, can result in death or serious
injury.
•
Stop motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other frequency
converters.
•
Disconnect or lock PM motor.
•
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.
Voltage Power range
[V] [kW]
380-480 110-315
380-480 45–400
525-690 315-1000
525-690 450-1200
High voltage can be present even when the warning LED
indicator lights are off.
Table 2.1 Discharge Time
MG20Z202
Design Guide
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
frequency converter properly can result in death or
serious injury.
•
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
DC power supply, or load sharing, 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 LOP, via remote
operation using MCT 10 software, or after a cleared fault
condition.
To prevent unintended motor start:
•
•
•
WARNING
EQUIPMENT HAZARD
Contact with rotating shafts and electrical equipment
Minimum waiting
can result in death or serious injury.
time
•
(minutes)
20
20
•
40
30
•
Danfoss A/S © Rev. 06/2014 All rights reserved.
Ensure the correct grounding of the equipment
by a certified electrical installer.
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, DC power supply, or load sharing.
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 these operating
instructions.
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