Surroundings:
Enclosure
≤
enclosure type A
IP 20, IP 55
Enclosure
≥
enclosure type A, B
IP 21, IP 55
Enclosure kit available
≤
enclosure type A
IP21/TYPE 1/IP 4X top
Vibration test
1.0 g
Max. relative humidity
5% - 95%(IEC 721-3-3; Class 3K3 (non-condensing) during operation
Aggressive environment (IEC 721-3-3), uncoated
class 3C2
Aggressive environment (IEC 721-3-3), coated
class 3C3
Test method according to IEC 60068-2-43 H2S (10 days)
Ambient temperature
Max. 50 °C
Derating for high ambient temperature, see section on special conditions
Minimum ambient temperature during full-scale operation
0 °C
Minimum ambient temperature at reduced performance
- 10 °C
Temperature during storage/transport
-25 - +65/70 °C
Maximum altitude above sea level without derating
1000 m
Maximum altitude above sea level with derating
3000 m
Derating for high altitude, see section on special conditions
EMC standards, Emission
EN 61800-3, EN 61000-6-3/4, EN 55011, IEC 61800-3
EMC standards, Immunity
EN 61800-3, EN 61000-6-1/2,
EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN
61000-4-6
See section on special conditions
Control card performance:
Scan interval
: 5 ms
Control card, USB serial communication:
USB standard
1.1 (Full speed)
USB plug
USB type B “device” plug
Connection to PC is carried out via a standard host/device USB cable.
The USB connection is galvanically isolated from the supply voltage (PELV) and other
high-voltage terminals.
The USB connection is not galvanically isolated from protection earth. Use only iso-
lated laptop/PC as connection to the USB connector on VLT HVAC Drive or an isolated
USB cable/converter.
3.2.1. Efficiency
Efficiency of VLT HVAC Drive Series (
η
VLT
)
The load on the frequency converter has little effect on its efficiency. In general, the efficiency is
the same at the rated motor frequency f
M,N
, even if the motor supplies 100% of the rated shaft
torque or only 75%, i.e. in case of part loads.
This also means that the efficiency of the frequency converter does not change even if other U/f
characteristics are chosen.
However, the U/f characteristics influence the efficiency of the motor.
The efficiency declines a little when the switching frequency is set to a value of above 5 kHz. The
efficiency will also be slightly reduced if the mains voltage is 480 V, or if the motor cable is longer
than 30 m.
3. VLT HVAC Selection
VLT
®
HVAC Drive Design Guide
58
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
3
Содержание VLT series
Страница 78: ...4 How to Order VLT HVAC Drive Design Guide 78 MG 11 B2 02 VLT is a registered Danfoss trademark 4...
Страница 120: ...7 RS 485 Installation and Set up VLT HVAC Drive Design Guide 120 MG 11 B2 02 VLT is a registered Danfoss trademark 7...
Страница 152: ...8 Troubleshooting VLT HVAC Drive Design Guide 152 MG 11 B2 02 VLT is a registered Danfoss trademark 8...