Emerson unidrive m200 User Manual page 60

Safety Product Mechanical
information information installation
Minimum resistance values and peak power rating for the
braking resistor at 40 °C (104 °F)
Table 4-19 Braking resistor resistance and power rating (100 V)
Minimum
Model resistance*
01100017
130
01100024
02100042
68
02100056
Table 4-20 Braking resistor resistance and power rating (200 V)
Minimum
Model resistance*
01200017
01200024
130
01200033
01200042
02200024
02200033
02200042
68
02200056
02200075
03200100 45
04200133
22
04200176
05200250 16.5
06200330
8.6
06200440
Table 4-21 Braking resistor resistance and power rating (400 V)
Minimum
Model resistance*
02400013
02400018
02400023 270
02400032
02400041
03400056
03400073 100
03400094
04400135
50
04400170
05400270 31.5
05400300 18
06400350
06400420 17
06400470
60
Electrical Getting Basic Running the
installation started parameters
Instantaneous Continuous
power rating power rating
kW kW
1.2
2.2
Instantaneous Continuous
power rating power rating
kW kW
1.2
2.2
3.4 2.2
6.9
10.3 8.6
12.6
19.7
16.4
Instantaneous Continuous
power rating power rating
kW kW
2.3
2.2
6.1 3
4
12.2
21.5 16.2
37.5 19.6
21.6
39.8 25
32.7
NV Media
Optimization
motor Card
Table 4-22 Braking resistor resistance and power rating (575 V)
Minimum
Model resistance*
05500030
05500040
05500069
06500100
06500150
06500190
06500230
06500290
06500350
* Resistor tolerance: ±10 %
For high-inertia loads or under continuous braking, the continuous power
dissipated in the braking resistor may be as high as the power rating of
the drive. The total energy dissipated in the braking resistor is dependent
on the amount of energy to be extracted from the load.
The instantaneous power rating refers to the short-term maximum power
dissipated during the on intervals of the pulse width modulated braking
control cycle. The braking resistor must be able to withstand this
dissipation for short intervals (milliseconds). Higher resistance values
require proportionately lower instantaneous power ratings.
In most applications, braking occurs only occasionally. This allows the
continuous power rating of the braking resistor to be much lower than
the power rating of the drive. It is therefore essential that the
instantaneous power rating and energy rating of the braking resistor are
sufficient for the most extreme braking duty that is likely to be
encountered.
Optimization of the braking resistor requires careful consideration of the
braking duty.
Select a value of resistance for the braking resistor that is not less than
the specified minimum resistance. Larger resistance values may give a
cost saving, as well as a safety benefit in the event of a fault in the
braking system. Braking capability will then be reduced, which could
cause the drive to trip during braking if the value chosen is too large.
Thermal protection circuit for the braking resistor
The thermal protection circuit must disconnect the AC supply from the
drive if the resistor becomes overloaded due to a fault. Figure 4-16
shows a typical circuit arrangement.
Figure 4-16 Typical protection circuit for a braking resistor
Main contactor
power supply
Start /
Reset
See Figure 4-1 on page 45 to Figure 4-6 on page 47 for the location of
the +DC and braking resistor connections.
Advanced
Technical data Diagnostics
parameters
Instantaneous
power rating
kW
80 12.1
13 74
Optional
EMC
filter
Stop
Thermal
protection
device
Braking resistor
Unidrive M200 / M201 User Guide
Issue Number: 4
UL Listing
Continuous
power rating
kW
2.6
4.6
6.5
8.7
12.3
16.3
19.9
24.2
31.7
Drive
+DC
BR