Setting Parameters
01/02 AWB8230-1413GB
136
Tripping characteristic with normal overload protection
With normal overload protection (PNU b013 = 01), the tripping
current is reduced, for example, by 90 % at 2.5 Hz (
a
fig. 137).
Accordingly, the tripping characteristic is offset to smaller current
values (
a
fig. 140).
Tripping characteristic at adjustable overload protection
Here, you can freely select the tripping characteristic
(PNU b013 = 02) by entering the appropriate currency and
frequency coordinates under PNU b015 to b020 (
a
fig. 138).
These must be within the limits shown (
a
fig. 141).
The tripping curve then has the following characteristic,
represented by the frequency set under PNU b018 (
a
fig. 142).
Figure 140: Tripping characteristic for constant overload protection at
2.5 Hz and
I
e
= 22 A
Figure 141: Setting range for the adjustable overload protection
a
Setting range
60
0
22.9 A
104 %
29.7 A
135 %
39.6 A
180 %
0.5
[s]
J
1
80
100
5
0
400
I
[%]
f
[Hz]
a
Figure 142: Tripping characteristic for adjustable overload protection
using PNU b018
60
0
B018:
116 %
120 %
150 %
0.5
[s]
t
I
PNU
Name
Adjustable in RUN mode
Value
Function
WE
Normal
Extended
b012
b212
Tripping current
for electronic
motor protection
device
–
j
0.2 to 1.2
x
I
e
1)
Setting range of the tripping current as a multiple of the
frequency inverter rated current, i.e. the range is given in
amperes (A).
I
e
1)
b013
b213
Characteristic for
electronic motor
protection device
–
j
The electronic thermal protection of the motor in the low speed range can be
increased to improve thermal monitoring of the motor at low frequencies.
01
00
Enhanced motor protection
01
Normal overload protection
02
Adjustable under b015 to b020
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