Danfoss FC 100 Series Especificações Página 37
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Motor protection can be implemented using a range of
techniques: PTC sensor in motor windings; mechanical
thermal switch (Klixon type); or Electronic Thermal Relay
(ETR).
1330
550
250
-20°C
175HA183.10
4000
3000
R
(Ω)
nominel
nominel -5°C
nominel +5°C
[°C]
Using a digital input and 10V as power supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter set-up:
Set 1-90 Motor Thermal Protection to Thermistor Trip [2]
Set 1-93 Thermistor Source to Digital Input 29 [6]
R
OFF
ON
<800 Ω >2.9 kΩ
18
19
12 20 55
27 29 42 45 50 53 54
DIGI IN
DIGI IN
DIGI IN
DIGI IN
61 68 69
N
P
COMM. GND
+24V
0/4-20mA A OUT / DIG OUT 0/4-20mA A OUT / DIG OUT
COM A IN
COM DIG IN
10V/20mA IN
10V/20mA IN
10V OUT
BUS TER.
OFF ON
130BB898.10
Using an analog input and 10V as power supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter set-up:
Set 1-90 Motor Thermal Protection to Thermistor Trip [2]
Set 1-93 Thermistor Source to Analog Input 54 [2]
NOTE
Do not set Analog Input 54 as reference source.
18
19
12 20 55
27 29 42 45 50 53 54
DIGI IN
DIGI IN
DIGI IN
DIGI IN
61 68 69
N
P
COMM. GND
+24V
0/4-20mA A OUT / DIG OUT 0/4-20mA A OUT / DIG OUT
COM A IN
COM DIG IN
10V/20mA IN
10V/20mA IN
10V OUT
BUS TER.
OFF ON
130BB897.10
R
<3.0 k Ω
>2.9k Ω
OFF
ON
Input
Digital/analog
Supply Voltage
Volt
Threshold
Cut-out Values
Digital 10V
< 800Ω - > 2.9kΩ
Analog 10V
< 800Ω - > 2.9kΩ
NOTE
Check that the chosen supply voltage follows the specifi-
cation of the used thermistor element.
Summary
With the ETR the motor is protected for being over heated
and there is no need for any further motor protection.
That means when the motor is heated up the ETR timer
controls for how long time the motor can be running at
the high temperature before it is stopped in order to
prevent over heating. If the motor is overloaded without
reaching the temperature where the ETR shuts of the
motor.
ETR is activated in 1-90 Motor Thermal Protection.
Introduction to VLT HVAC Ba... VLT HVAC Basic Drive Design Guide
36 MG.18.C2.02 - VLT
®
is a registered Danfoss trademark
22
- 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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