5 Selecting Function
5-11
FVR-C11S-EN
5
Change during operation: X = impossible,
= possible (enabled by using
),
= possible (enabled by using
)
Electronic thermal O/L relay
(thermal time constant)
The figure below shows the continuous permis-
sible current with F10 (electronic thermal O/L re-
lay [Select]) = 1.
The figure below shows the continuous permis-
sible current with F10 (electronic thermal O/L re-
lay [Select]) = 2. 100% of the continuous
permissible current is the current value set with
function F11 (electronic thermal O/L relay [Lev-
el]).
The graph below shows the electronic thermal
O/L relay operating characteristics. Output cur-
rent values for the electronic thermal operating
levels (values set with function F11) are plotted
horizontally and operating times for output cur-
rent are plotted vertically.
This graph is for F10 = 1 with the base frequency
of 50Hz. The characteristics for output frequen-
cies exceeding the base frequency are the same
as the characteristics for the base frequency.
When function F10 is set to 2, the characteristics
are always the same as those for the base fre-
quency. The operating time with output current
of 150% can be adjusted by using function F12
(electronic thermal O/L relay (thermal time con-
stant)).
Factory setting
Change during
operation
5. 0min
to
This function sets the operating
time of the electronic thermal O/L
relay when the current that is
150% of the operation level flows.
0.5 to 10.0 min. can be set
(in 0.1 min. step).
F12
0. 5
1 0. 0
0
20
40
60
80
100
120
0
0.2
0.4
0.6
0.8
1
Continuous permissible current (F10=1)
Output frequency/base frequency
permissible
Continuous
current (%)
0
20
40
60
80
100
120
0
0.2
0.4
0.6
0.8
1
Continuous permissible current (F10=2)
Output frequency/base frequency
permissible
Continuous
current (%)
0
5
10
15
20
1Hz
5Hz 20Hz 30Hz
50Hz
0
50
100
150
200
Operating time characteristics
Output current/set operating level (%)
Operating time (minute)
Set
with F12
(Base frequency)
