Danfoss VLT 6000 HVAC Series User Manual

Derating for air pressure
Below 1000 m altitude no derating is necessary.
Above 1000 m the ambient temperature (T
AMB
) or max.
output current (I
VLT,MAX
) must be derated in accord-
ance with the diagram below:
1. Derating of output current versus altitude at
T
AMB
= max. 45°C
2. Derating of max. T
AMB
versus altitude at
100% output current.
Derating for running at low speed
When a centrifugal pump or a fan is controlled by a
VLT 6000 HVAC frequency converter, it is not neces-
sary to reduce the output current at low speed because
the load characterstic of the centrifugal pumps/fans,
automatically ensures the necessary reduction.
Derating for long motor cables or cables with larg-
er cross-section
VLT 6000 HVAC has been tested using 300 m
unscreened/unarmoured cable and 150 m screened/
armoured cable.
VLT 6000 HVAC has been designed to work using a
motor cable with a rated cross-section. If a cable with
a larger cross-section is to be used, it is recommended
to reduce the output current by 5% for every step the
cross-section is increased. (Increased cable cross-
section leads to increased capacity to earth, and thus
an increased earth leakage current).
Derating for high switching frequency
A higher switching frequency (to be set in parameter
407, Switching frequency) leads to higher losses in the
electronics of the frequency converter.
VLT 6000 HVAC has a pulse pattern in which it is pos-
sible to set the switching frequency from 3.0- 10.0/14.0
kHz.
The frequency converter will automatically derate the
rated output current I
VLT,N,
when the switching frequen-
cy exceeds 4.5 kHz.
In both cases, the reduction is carried out linearly,
down to 60% of I
VLT,N
.
The table gives the min., max. and factory-set switch-
ing frequencies for VLT 6000 HVAC units.
Switching frequency [kHz]
Min. Max. Fact.
VLT 6002-6005, 200 V 3.0 10.0 4.5
VLT 6006-6032, 200 V
3.0 14.0 4.5
VLT 6042-6062, 200 V
3.0 4.5 4.5
VLT 6002-6011, 460 V
3.0 10.0 4.5
VLT 6016-6062, 460 V
3.0 14.0 4.5
VLT 6072-6122, 460 V
3.0 4.5 4.5
VLT 6152-6352, 460 V
3.0 4.5 4.5
VLT 6402-6602, 460 V
1.5 3.0 3.0
VLT 6002-6011, 600 V
4.5 7.0 4.5
VLT 6016-6032, 600 V
3.0 14.0 4.5
VLT 6042-6062, 600 V
3.0 10.0 4.5
VLT 6072, 600 V
3.0 4.5 4.5
VLT 6102-6352, 690 V
1.5 2.0 2.0
VLT 6402-6652, 600 V
1.5 1.5 1.5
VLT
®
6000 HVAC Series
200 MG.61.B5.02 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 6000 HVAC Series Specifications

General

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