Danfoss FC 100 Series Specifiche Pagina 8
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Trip Locked
A state entered in fault situations when the frequency
converter is protecting itself and requiring physical
intervention, e.g. if the frequency converter is subject to a
short circuit on the output. A locked trip can only be
cancelled by cutting off mains, removing the cause of the
fault, and reconnecting the frequency converter. Restart is
prevented until the trip state is cancelled by activating
reset or, in some cases, by being programmed to reset
automatically. Trip locked may not be used for personal
safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
VVC
plus
If compared with standard voltage/frequency ratio control,
Voltage Vector Control (VVC
plus
) improves the dynamics
and the stability, both when the speed reference is
changed and in relation to the load torque.
1.1.6
Power Factor
The power factor is the relation between I
1
and I
RMS
.
Power
factor
=
3 ×
U
×
I
1 ×
COS
ϕ
3 ×
U
×
I
RMS
The power factor for 3-phase control:
=
I
1
×
cos
ϕ1
I
RMS
=
I
1
I
RMS
since
cos
ϕ1 = 1
The power factor indicates to which extent the frequency
converter imposes a load on the mains supply.
The lower the power factor, the higher the I
RMS
for the
same kW performance.
I
RMS
=
I
1
2
+
I
5
2
+
I
7
2
+ . . +
I
n
2
In addition, a high power factor indicates that the different
harmonic currents are low.
The frequency converters' built-in DC coils produce a high
power factor, which minimizes the imposed load on the
mains supply.
How to Read this Design Gui... VLT HVAC Basic Drive Design Guide
MG.18.C2.02 - VLT
®
is a registered Danfoss trademark 7
1 1
- Design Guide 1
- MG.18.C2.02 - VLT 2
- 2 MG.18.C2.02 - VLT 3
- Revision Rights 4
- Basic Drive 4
- 1.1.4 Abbreviations 5
- 1.1.5 Definitions 6
- 6 MG.18.C2.02 - VLT 7
- Power Factor 8
- DANGEROUS VOLTAGE 9
- UNINTENDED START 9
- DISCHARGE TIME 9
- IEC/EN 60068-2-6: 11
- Vibration (sinusoidal) - 1970 11
- 10 MG.18.C2.02 - VLT 11
- Comparison of Energy Savings 13
- Without a Frequency Converter 15
- Application Examples 16
- 2.5.12 Variable Air Volume 16
- 2.5.13 The VLT Solution 17
- 2.5.14 Constant Air Volume 18
- 2.5.15 The VLT Solution 18
- 2.5.16 Cooling Tower Fan 19
- 2.5.17 The VLT Solution 19
- 2.5.18 Condenser Pumps 20
- 2.5.19 The VLT Solution 20
- 2.5.20 Primary Pumps 21
- 2.5.21 The VLT Solution 22
- 2.5.22 Secondary Pumps 23
- 2.5.23 The VLT Solution 23
- 2.6 Control Structures 24
- Feedback Conversion 25
- 2.6.5 Reference Handling 26
- 26 MG.18.C2.02 - VLT 27
- 28 MG.18.C2.02 - VLT 29
- 2.6.8 Manual PI Adjustment 31
- 2.7 General Aspects of EMC 31
- 2.7.2 Emission Requirements 32
- 2.7.3 EMC Test Results 33
- Emission 34
- = 3 × 120 × 400 × 35
- 175ZA052.12 36
- <800 Ω >2.9 kΩ 37
- R1.5 +_ 0.5 38
- 130BB778.10 39
- 130BB902.10 40
- 130BB903.10 40
- 3.1.4 Decoupling Plate 41
- 130BB793.10 41
- 4 How to Order 42
- 4.1.2 Type Code String 43
- 4.2.2 Harmonic Filters 45
- External RFI Filter 45
- 5 How to Install 46
- 5.1.2 Field Mounting 48
- 5.2 Electrical Data 48
- 5.2.1 Electrical Overview 48
- L1 91 / L2 92 / L3 93 51
- U 96 / V 97 / W 98 51
- 5.2.4 Fuses 51
- 130BB761.10 53
- 5.2.6 Control Terminals 54
- 6 How to Programme 55
- 56 MG.18.C2.02 - VLT 57
- Closed Loop Set-up Wizard 60
- Main Menu 62
- 62 MG.18.C2.02 - VLT 63
- 7.1.1 Network Connection 65
- 7.4.7 The PKE Field 68
- 96 and length 4 would 75
- 96 and length 75
- 80 MG.18.C2.02 - VLT 81
- 8.1 Mains Supply Tables 82
- 130BB632.10 83
- 8.2 General Specifications 87
- 8.3 Acoustic Noise 89
- 90 MG.18.C2.02 - VLT 91
- *MG18C202* 93
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