MV3DB Series DB Units
2. Specifications
(07/06)
ALSPA MV3000e Dynamic Braking Units
Page 2-1
2. Specifications
2.1 Electrical
Specification of DB Units and Standard Braking Resistors
General specifications for the DB Units and standard braking resistors are given in Table 2-1.
Default values for the braking voltage – the voltage at which the DB Unit switches the resistor
into circuit – are given in Table 2-2.
Table 2-1 – Electrical specifications for the DB Unit and the required standard braking resistor
DB Unit
Suitable Braking Resistor*
Used with drives
Resistance
Standard Resistor from
Converteam
Model
Frame
size
Nominal
ac voltage
grade
Volts
Nominal
Current
Amps
Nominal
Power during
18 seconds
ON time
kW
Minimum
Ohms
Maximum
(to achieve
nominal
power)
Ohms
Name
Resistance
Ohms
MV3DB045S5 3
400
45
28.10
13.6 16.6
MV3DBR045S4
13.6
" 3
480
38
28.30
15.3
23.6
MV3DBR038S5
15.3
MV3DB092S5 4
400
92
57.00
6.8
8.21 MV3DBR092S4
6.8
" 4
480
76
56.70
7.6
11.8
MV3DBR076S5
7.6
MV3DB061S6 4
690
61
56.70
11.0 20.3
MV3DBR061S6
11.0
MV3DB247S5 6
400
247
153.30
1.6
3.1 MV3DBR247S4
2.6
" 6
480
231
171.70
1.8
3.9
MV3DBR231S5
3.3
MV3DB185S6 6
690
185
171.70
3.7
6.7 MV3DBR185S6
5.1
MV3DB391S5 7
400
391
241.9
1.6
1.9 MV3DBR391S4
1.6
" 7
480
308
228.9
1.8
2.9
MV3DBR308S5
1.8
MV3DB246S6 7
690
246
228.9
3.7
5.0 MV3DBR246S6
3.7
* The chosen resistor must not be less than the minimum resistor value given in Table 2-1,
including its manufacturing and temperature related tolerances. If the rated braking power
given in Table 2-1 is required, the chosen resistor should not exceed the maximum resistance
value given in Table 2-1, including its manufacturing and temperature related tolerances.
If the application does not require the full nominal power of the DB Unit, a braking resistor may
be used which has a higher ohmic value.
Notes:
1. Refer to Section 3 (System Design) for notes on the calculation of the braking power and
for a typical application.
2. Physical dimensions of
Converteam
resistors are provided with the product.
Table 2-2 Default braking voltage
Nominal ac voltage
grade of drive
Volts
Default *
braking voltage
Volts
400 732
480 846
600/690 1118
* Drive dependent. Can be adjusted in
drive Menu 23.
