Danfoss VLT AutomationDrive FC 300 Design Manual page 145

FC 300 Design Guide
Reliable galvanis isolation until Vi
Perm. ambient temperature
Moisture
EMC resistance
EMC emissions
Vibration resistance
Shock resistance
Safety system values:
EN 61508, ISO 13849 for Tu = 75
Category
SIL
HFT
PFD (for yearly functional test)
SFF
λ + λ
s DD
λ
DU
Ordering number 130B1137
8.1.14. Brake Resistors
In applications where the motor is used as a brake, energy is generated in the motor and send
back into the frequency converter. If the energy can not be transported back to the motor it will
increase the voltage in the converter DC-line. In applications with frequent braking and/or high
inertia loads this increase may lead to an over voltage trip in the converter and finally a shut down.
Brake resistors are used to dissipate the excess energy resulting from the regenerative braking.
The resistor is selected in respect to its ohmic value, its power dissipation rate and its physical
size. Danfoss offers a wide verity of different resistors that are specially designed to our drive code
numbers can be found in section
8.1.15. Remote mounting Kit for LCP
The Local Control Panel can be moved to the
front of a cabinet by using the remote build in
kit. The enclosure is the IP65. The fastening
screws must be tightened with a torque of
max. 1 Nm.
o
C ongoing
How to order
MG.33.B9.02 - VLT ® is a registered Danfoss trademark
8. Options and Accessories
EN 60068-2-1 Dry heat
5 --- 95%, no condensation permissible
2 for maintenance cycle of 2 years
1 for maintenance cycle of 3 years
.
Technical data
Enclosure:
Max. cable length between VLT
and unit:
Communication std:
500 V
o o
-20 C ... +60 C
EN61000-6-2
EN61000-6-4
10 ... 1000 Hz 1.14g
50 g
2
0
4.10 *10 -3
90%
8515 FIT
932 FIT
IP 65 front
3 m
RS 485
145
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