Quick Guide; Safety; Warnings; Safety Instructions - Danfoss VLT Series Quick Manual

Quick Guide

1 1
1 Quick Guide

1.1 Safety

1.1.1 Warnings

WARNING
High Voltage Warning
The voltage of the frequency converter is dangerous
whenever it is connected to mains. Incorrect installation of
the motor or frequency converter may cause damage to
the equipment, serious injury or death. Consequently, it is
essential to comply with the instructions in this manual as
well as local and national rules and safety regulations.
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.
Voltage [V]
3x400
3x400
Table 1.1 Discharge Time
2
VLT
Power range [kW] Minimum waiting time
[min]
0.37–7.5
11–90
MG18F402 - VLT
®
HVAC Basic Drive Cascade Controller Quick Guide
CAUTION
Leakage Current:
The earth leakage current from the frequency converter
exceeds 3.5 mA. According to IEC 61800-5-1 a reinforced
Protective Earth connection must be ensured by means of
a min. 10 mm² Cu or an additional PE wire - with the same
cable cross section as the Mains wiring - must be
terminated separately.
Residual Current Device:
This product can cause a DC current in the protective
conductor. Where a residual current device (RCD) is used
for extra protection, only an RCD of Type B (time delayed)
shall be used on the supply side of this product. See also
Danfoss Application Note on RCD, Protection against
Electrical Hazard.
Protective earthing of the frequency converter and the use
of RCDs must always follow national and local regulations.
Motor Thermal Protection
Motor overload protection is possible by setting 1-90 Motor
Thermal Protection to the value Electronic Thermal Relay
(ETR) trip.
WARNING
Installation at high altitudes
For altitudes above 2 km, contact Danfoss regarding PELV.

1.1.2 Safety Instructions

•
Make sure the frequency converter is properly
connected to earth.
4
•
Do not remove mains connections, motor
15
connections or other power connections while
the frequency converter is connected to power.
•
Protect users against supply voltage.
•
Protect the motor against overloading according
to national and local regulations.
•
The earth leakage current exceeds 3.5 mA.
•
The [Off/Reset] key is not a safety switch. It does
not disconnect the frequency converter from
mains.
®
is a registered Danfoss trademark