42
Voltage and current characteristic, Circuit B2C:
Us = 400 V, 50 Hz, Id = 0,21 A, L
F
= 10 H, R
F
= 1475 , Udc = 310 V bei = 33 Grad
Measurements that can be performed on the SINAMICS DCM
In normal conditions a multimeter can be used as the measuring instrument, because
measured value recordings can be performed with the trace function with STARTER.
If an oscilloscope or recorder is also available, more in-depth measurement evaluations will
not pose a problem; however, special knowledge is required to handle these devices.
.
WARNING
The warning notices at the beginning of this document and in the instructions of the devices
used must be observed to avoid hazards to people.
If the monitoring, limitation or control features implemented in the device are deactivated, for
example, by operating the device in controlled operation, this can result in additional danger
for the system.
A source of particular danger are the dangerous voltages on the devices, the loads and their
power supply cables, as well as the rotating and moving parts, such as the web.
Measurement of electrical variables
Electrical variables that can be measured with a multimeter:
Alternating and direct voltage; voltage U in volts: [V]
Alternating voltage: Preset measuring device to V-AC or V~,
Direct voltage: Preset measuring device to V-DC or V=,
Alternating or direct current; current I in amperes: [A]
Alternating current: Preset measuring device to A-AC or A~
Direct current: Preset measuring device to A-DC or A=
Resistance in ohms: [ ], the resistance is equal to U divided by I; 1 V / 1 A = 1
Preset measuring device to
Electrical variables measurable with special measuring devices:
Apparent power S in [VA], or [kVA];
Active power P in watts, [W], or [kW]; P = S * cos
Reactive power Q in [Var], or [kVar]; Q = S * sin
Power factor: cos = P / S;
Time in [ms]
Laststrom Idc
0
0,05
0,1
0,15
0,2
0,25
0,3
0
5
10
15
20
25
30
Zeit in [ms}]
Id
c
in
[
A
]
Umotor
-400
-300
-200
-100
0
100
200
300
400
500
600
700
0
5
10
15
20
25
30
Zeit in [ms]
U
-M
o
to
r
in
[
V
]
L
