Ea Elektro Automatik EA Elektro-Automatik EA-ELR 9250-140 3U Electronic Load 0 - 140 A 0 - 250 Vdc 0 - 7000 W 33200406 データシート
製品コード
33200406
Page 60
ELR 9000 Series
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
► How to start and stop a function
1.
The function can be started either by tapping
or pushing the “On/Off” button, if the DC input is
currently switched off. The function then starts immediately. In case START is used while the DC input is
still switched off, the DC input will be switched on automatically.
During the progress of the functions
sine wave, rectangular wave, triangular wave, trapezoi-
dal wave or ramp no actual values are displayed.
2.
The function can be stopped either by tapping
or pushing the “On/Off” button. However, there
is a difference:
a) The
a) The
are only stops the function, the DC input remains ON with the static value in effect.
b) The “On/Off“ button stops the function and switches the DC input off.
Any device alarm (overvoltage, overtemperature etc.) or protection (OPP, OCP) or event with
action = Alarm stops the function progress automatically, switched of the DC input and reports
the alarm in the display.
3.9.5 Sine wave function
The following parameters can be configured for a sine function:
Value
Range
Description
I(A), U(A)
0...(Nominal value - (Off)) von
U, I
A = Amplitude of the signal to be generated
I(Off), U(Off) (A)...(Nominal value - (A)) von
U, I
Off = Offset, based on the zero point of the mathematic sine
curve, may not be smaller than the amplitude.
f (1/t)
1...10000 Hz
Static frequency of the signal to be generated
Schematic diagram:
Application and result:
O
ffs
et
A
m
pli
tude
t
A
f
A
m
plit
ude
A normal sine wave signal is generated and applied to
the selected set value, e.g. current (I). At a constant
input voltage the current input of the load will follow a
sine wave.
For calculating the maximum power input the amplitude
For calculating the maximum power input the amplitude
and offset values for the current must be added.
Example: with an input voltage of 100 V and sin(I) se-
Example: with an input voltage of 100 V and sin(I) se-
lected, set the amplitude to 30 A and the offset to 50 A.
The resulting maximum input power is then achieved at
the highest point of the sine wave and is (30 A + 50 A)
* 100 V = 8000 W.
3.9.6 Triangular function
The following parameters can be configured for a triangular wave function:
Value
Range
Description
I(A), U(A)
0...(Nominal value - (Off)) of U, I
A = Amplitude of the signal to be generated
I(Off), U(Off) 0...(Nominal value - (A)) of U, I
Off = Offset, based on the foot of the triangular wave
t1
0.1 ms...36000 s
Time for the positive slope of the triangular wave signal.
t2
0.1 ms...36000 s
Time for the negative slope of the triangular wave signal