Technical data
40 Operating instructions RLD
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
3.5
Thermal limited load graphs
By means of these thermal limited load graphs you can find out the maximum switching-
on time depending on the needed braking power. The curves are valid for a maximum
cooling air temperature of 35°C (95°F).
Example of an application:
Diagram 3.5.1.1.1
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
:
N
ecessary 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
allowed.
Remark:
In case of an intermission time of e.g. 3,5 min, this operation cycle would
be allowed again.
0
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4
5
6
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8
9
10
0
1
2
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4
5
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11
100 % constant power: 26 kW
33 kW
45 kW
min
braking
time
min
intermission time
REVCON RLD B 45-XXX-1-...
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Содержание RLD B
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