Danfoss VLT 6000 HVAC Series User Manual

High voltage test
A high voltage test can be carried out by short-circuit-
ing terminals U, V, W, L1, L2 and L3 and energizing by
max. 2.5 kV DC for one second between this short-
circuit and the chassis.
NB!
The RFI switch must be closed (position
ON) when high voltage tests are carried
out. The mains and motor connection
must be interrupted in the case of high
voltage tests of the total installation if the
leakage currents are too high.
Heat emission from VLT 6000 HVAC
The tables in General technical data show the power
loss P
Φ
(W) from VLT 6000 HVAC. The maximum
cooling air temperature t
IN MAX
, is 40° at 100% load (of
rated value).
Ventilation of integrated VLT 6000 HVAC
The quantity of air required for cooling frequency con-
verters can be calculated as follows:
1. Add up the values of P
φ
for all the frequency
converters to be integrated in the same pan-
el. The highest cooling air temperature (t
IN
)
present must be lower than t
IN, MAX
(40°C).
The day/night average must be 5°C lower
(VDE 160). The outlet temperature of the
cooling air must not exceed: t
OUT, MAX
(45° C).
2. Calculate the permissible difference between
the temperature of the cooling air (t
IN
) and its
outlet temperature (t
OUT
):
Δt = 45° C-t
IN
.
3. Calculate the required
quantity of air =
∑ P ϕ ×3.1
∆
t
m
3
/
h
insert Δt in Kelvin
The outlet from the ventilation must be placed above
the highest-mounted frequency converter. Allowance
must be made for the pressure loss across the filters
and for the fact that the pressure is going to drop as
the filters are choked.
EMC correct electrical installation
Following these guidelines is recommended in cases
where compliance with EN 61000-6-3/4, EN 55011 or
EN 61800-3 First environment is required. If the instal-
lation is in EN 61800-3 Second environment, then it is
acceptable to deviate from these guidelines. It is how-
ever not recommended. See also CE labelling, Emis-
sion and EMC test results under special conditions in
the Design Guide for further details.
Good engineering practice to ensure EMC correct
electrical installation:
• Use only braided screened/armoured motor
cables and control cables.
The screen should provide a minimum cov-
erage of 80%. The screen material must be
metal, not limited to but typically copper, alu-
minium, steel or lead. There are no special
requirements for the mains cable.
• Installations using rigid metal conduits are
not required to use screened cable, but the
motor cable must be installed in conduit sep-
arate from the control and mains cables. Full
connection of the conduit from the drive to the
motor is required. The EMC performance of
flexible conduits varies a lot and information
from the manufacturer must be obtained.
• Connect the screen/armour/conduit to earth
at both ends for motor cables and control ca-
bles. See also Earthing of braided screened/
armoured control cables.
• Avoid terminating the screen/armour with
twisted ends (pigtails). Such a termination in-
creases the high frequency impedance of the
screen, which reduces its effectiveness at
high frequencies. Use low impedance cable
clamps or glands instead.
• Ensure good electrical contact between the
mounting plate and the metal chassis of the
frequency converter. This does not apply to
IP54 units as they are designed for wall
mounting and VLT 6152-6602, 380-480 V,
VLT 6102-6652, 525-600 V, VLT 6042-6062,
200-240 VAC in IP20/NEMA1 enclosure.
• Use starwashers and galvanically conductive
installation plates to secure good electrical
connections for IP00, IP20, IP21 and NEMA
1 installations.
• Avoid using unscreened/unarmoured motor
or control cables inside cabinets housing the
drive(s), where possible.
• An uninterrupted high frequency connection
between the frequency converter and the
motor units is required for IP54 units.
VLT
®
6000 HVAC Series
MG.61.B5.02 - VLT
®
is a registered Danfoss trademark 73
Installation

Danfoss VLT 6000 HVAC Series Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC Series
Category	DC Drives
Language	English