Compax3
Accessories
Positioning via digital I/Os
270
192-120101 N11 C3I11T11 November 2007
9.4.1.1
Calculation of the BRM cooling time
BRM04/01 (230V_3AC)
100
1000
10000
0
0,5
1
1,5
2
2,5
3
3,5
4
Braking time [s]
P
B
dy
n [W
]
F = Factor
Cooling time = F * braking time
Example 1: For a braking time of 1s, a braking power of 1kW is required. The
Diagram shows the following:
The required values can be found in the range between characteristic F = 0.5 and
F = 1. In order to achieve operating safety, please select the higher factor, this
means that the required cooling time is 1s.
F * Braking
time
= cooling time
1 * 1s
=
1s
Example 2: For a braking time of 0.5s, a braking power of 3kW is required. The
Diagram shows the following:
The required values can be found in the range between characteristic F = 2 and F
= 5. In order to achieve operating safety, please select the higher factor, this
means that the required cooling time is 2.5s.
F * Braking
time
= cooling time
5 * 0.5s
=
2.5s
F=10
F=20
F=5
F=2
F=1
F=0.5
