Danfoss FC 300 Design Manual page 162

8. Options and Accessories
Measurement voltage surge resistance
Overvoltage category
Degree of pollution
Measurement isolation voltage Vbis
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 = 167
Category
SIL
HFT
PFD (for yearly functional test)
SFF
λ + λ
s
8
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 sent
back into the adjustable frequency drive. If the energy cannot be transported back to the motor,
it will increase the voltage in the drive DC line. In applications with frequent braking and/or high
inertia loads, this increase may lead to an overvoltage trip in the drive, and ultimately, 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 for our
drives. Code numbers can be found in the 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 built-in
kit. The enclosure is the IP 65. The fastening
screws must be tightened with a torque of
max. 1 Nm.
162
DD
MG.33.B9.22 - VLT
-4 o
5 --- 95%, no condensation permissible
o o
F [75 C] ongoing
2 for maintenance cycle of 2 years
1 for maintenance cycle of 3 years
How to order
Technical data
Enclosure:
Max. cable length between VLT
and unit:
Communication std:
® is a registered Danfoss trademark.
FC 300 Design Guide
6000 V
690 V
500 V
F ... +140 o F [-20 o C ... +60
EN 60068-2-1 Dry heat
EN61000-6-2
EN61000-6-4
10 ... 1000 Hz 1.14g
1.8 oz [50 g]
4.10 *10
90%
8515 FIT
932 FIT
.
IP 65 front
3 m
RS-485
III
2
o C]
2
0
-3