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

Introduction

2 Introduction
2 2

2.1 Safety

2.1.1 Safety Note
WARNING
The voltage of the frequency converter is dangerous
whenever connected to mains. Incorrect installation of the
motor, frequency converter, or fieldbus could damage the
equipment or cause serious personal injury or death. The
instructions in this manual, as well as national and local
rules and safety regulations, must be complied with.
Safety Regulations
1. The frequency converter must be disconnected
from mains for repairs. Check that the mains
supply has been disconnected and that the
necessary time has passed before removing
motor and mains plugs.
2. [Stop/Reset] does not disconnect the equipment
from mains and is not intended as a safety
switch.
3. Correct protective earthing of the equipment
must be established, the operator must be
protected against supply voltage, and the motor
must be protected against overload in
accordance with applicable national and local
regulations.
4. The earth leakage currents are higher than 3.5
mA.
5. Protection against motor overload comes from
1-90 Motor Thermal Protection. If this function is
desired, set 1-90 Motor Thermal Protection to data
value [4] ETR trip (default value) or data value [3]
ETR warning
NOTE
The function is initialised at 1.16 x rated motor current and
rated motor frequency. For the North American market:
The ETR functions provide class 20 motor overload
protection in accordance with NEC.
6. Do not remove the plugs for the motor and
mains supply while the frequency converter is
connected to mains. Check that the mains supply
has been disconnected and that the necessary
time has passed before removing motor and
mains plugs.
7. The frequency converter has more voltage inputs
than L1, L2, and L3, when load sharing (linking of
12
®
VLT AQUA Drive FC 202 Design Guide
Installation at High Altitudes
WARNING
For installation in altitudes above 3 km (350-500 V), or 2
km (525-690 V), contact Danfoss regarding PELV.
Warning against unintended start
1.
2.
3.
Refer to VLT
safety guidelines.
WARNING
DISCHARGE TIME!
Frequency converters contain DC-link capacitors that can
remain charged even when the frequency converter is not
powered. To avoid electrical hazards, disconnect AC mains,
any permanent magnet type motors, and any remote DC-
link power supplies, including battery backups, UPS and
DC-link connections to other frequency converters. Wait for
the capacitors to fully discharge before performing any
service or repair work. The amount of wait time is listed in
the Discharge Time table. Failure to wait the specified time
after power has been removed before doing service or
repair could result in death or serious injury.
Rating [kW]
110–315
45–400
315-1000
450–1200
Table 2.1 DC Capacitor Discharge Times
®
MG20Z102 - VLT is a registered Danfoss trademark
DC intermediate circuit) and external 24 V DC
have been installed. Check that all voltage inputs
have been disconnected and that the necessary
time has passed before commencing repair work.
The motor can be brought to a stop with digital
commands, bus commands, references, or a local
stop, while the frequency converter is connected
to mains. If personal safety considerations make it
necessary to ensure that no unintended start
occurs, these stop functions are not sufficient.
While parameters are being changed, the motor
could start. [Stop/Reset] must always be
activated; after which data can be modified.
A stopped motor may start if faults occur in the
electronics of the frequency converter, or if a
temporary overload or a fault in the supply mains
or the motor connection ceases.
®
AQUA Drive Operating Instructions for further
380–480 V
20 minutes
40 minutes
525–690 V
20 minutes
30 minutes