Technical data
page 32
ELTROPLAN-REVCON
3.3.3.1
Thermal limited load graphs
By means of these thermal limited load graphs you can find out the max. switch-on-time de-
pending on the needed braking power. The curves are valid
for
a
max.
cooling
air temperature
of 35°C (95°F).
Example of an application:
Diagram
3.3.3.1.1
Example :
necessary braking power
: 33 kW
braking duration
: 2 min.
time between two brakes
: 5 min.
Evaluation:
In this case the point of intersection of braking time and intermission time is
below
the thermal limited power graph in the allowed area (with forced cooling).
Remark:
Without forced cooling, the intermission time is 8 minutes.
Example :
necessary braking power
: 45 kW
braking duration
: 3 min.
time between two brakes
: 3 min.
Evaluation:
In this case the point of intersection of braking time and intermission time is
above
the thermal limited power graph. That means this operation cycle is not al-
lowed.
Remark:
In case of an intermission time of e.g. 3,5 min. this operation cycle would be
allowed again.
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
11
100 % constant power: 26 kW
33 kW
45 kW
min
braking
time
min
intermission time
REVCON
SV(C
))))
45-XXX-1-...
2
2
1
1
