SIEMENS
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Siemens MD 50.1 · 2015
Appendix
Lists
List of variables to dimension the drive
13
■
Important drive technology variables
(continued)
*
The numerical value of a variable in previously used units multiplied by the conversion rate gives the numerical value of the variable in SI units.
SI unit
Size
Symbol
Unit symbol
Designation or
conversion factor
*
)
SI
Previously
SI
Previously
Dynamic viscosity
η
η
Pa · s
P
10
-1
Kinematic viscosity
υ
υ
m
2
/s
St
10
-4
Electrical current
I
I
A
A
1 A = 1 W/V = 1 V/
Ω
Electrical voltage
U
U
V
V
1 V = 1 W/A
Electrical resistance
R
R
Ω
Ω
1
Ω
= 1 V/A = 1/S
Electrical conductance
G
G
S
S
1 S = 1/
Ω
Electrical capacitance
C
C
F
F
1 F = 1 C/V
Electric charge
Q
Q
C
C
1 C = 1 A · s
Inductance
L
L
H
H
1 H = 1 Vs/A
Magnetic flux density
Induction
B
B
T
G
10
4
1 T = 1 Wb/m
2
Magnetic field strength
H
H
A/m
A/m
Magnetic flux
φ
φ
Wb
M
10
8
1 Wb = 1 V · s
Temperature
T(
ϑ
)
t
K(°C)
°C
0 K = -273.15 °C
© Siemens AG 2015