Introduction
Operating instructions RHF
21
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
For example:
An 18.5kW drive is installed on a 400V/50Hz grid with a 35A RHF-A (type code
RHF-A-35-400-50-20-A).
The following values are measured for different load currents, using a harmonic
analyzer:
I
N
RMS [A]
I
1
RMS [A]
Fundamental current 50 Hz
THDI [%]
Total harmonic current
I
h
RMS [A]*
9,60
9,59
5,45
0,52
15,24
15,09
13,78
2,07
20,54
20,08
12,46
2,50
25,17
25,00
11,56
2,89
30,27
30,10
10,50
3,15
35,20
34,03
9,95
3,39
Table 2: Measurement RHF-A 35-400-50-20-A
* Calculated values
Table 3: Diagram RHF-A 35-400-50-20-A
0
0,5
1
1,5
2
2,5
3
3,5
4
0,0
2,0
4,0
6,0
8,0
10,0
12,0
14,0
16,0
5,00
10,00
15,00
20,00
25,00
30,00
35,00
T
o
tal
h
ar
m
o
n
ic
c
u
rr
e
n
t
I
h
T
H
D
I
[%
]
I
Mains
[A]
RHF-A 35-400-50-20-A
THDI [%]
Total harmonic current Ih