5-64
Input pha
tion (
lin
) (Bit 1)
se loss protec
on dete
ve stress inflicted on the apparatus connected to the main circuit
Up
ction of an excessi
due to phase loss or line-to-line voltage unbalance in the three-phase power supplied to the
inverter, this feature stops the inverter and displays an alarm
lin
.
In configurations where only a light load is driven or a DC reactor is connected,
phase loss or line-to-line voltage unbalance may not be detected because of the
relatively small stress on the apparatu connect
to the main circuit.
s
ed
Output phase loss protection (
0pl
) (Bit 2)
Upon detection of phase loss in the output while the inverter is running, this feature stops the
inverter and di
0pl
splays an alarm
. Where a magnetic contactor is installed in the inverter
nt threshold on the life of DC link bus capacitor (Bit 3)
output circuit, if the magnetic contactor goes OFF during operation, all the phases will be lost.
In such a case, this protection feature does not work.
Judgme
3 is used
citor between
ctory de
Bit
fa
to select the threshold for judging the life of the DC link bus capa
fault setting and your own choice.
reference level in advance.
Before specifying the threshold of your own choice, measure and confirm the
Judgment on the life of DC link bus capacitor (Bit 4)
Whether the DC link bus capacitor has reached its life is determined by measuring the length
of time for discharging after power off. The discharging time is determined by the capacitance
of the DC link bus capacitor and the load inside the inverter. Therefore, if the load inside the
tly in the following cases, disable the judgment on the life during
Bit 4
Bit 3
Bit 1
Bit 0
inverter fluctuates significantly, the discharging time cannot be accurately measured, and as a
result, it may be mistakenly determined that the life has been reached. To avoid such an error,
you can disable the judgment on the life of the DC link bus capacitor.
Since load may vary significan
operation. Either conduct the measurement with the judgment enabled under appropriate
conditions during periodical maintenance or conduct the measurement under the operating
conditions matching the actual ones.
• An option card or multi-function keypad is used.
• Another inverter or equipment such as a PWM converter is connected to the terminals of
the DC link bus.
To set data of H98, assign functions to each bit (total 5 bits) and set it in decimal format. The
table below lists functions assigned to each bit.
Bit number
Bit 2
Functi
life
Select life
judgment
capacitor
Detect output Detect input
Lower the
carrier
automatically
on
Judge the
of DC link bus
capacitor
threshold of DC
link bus
phase loss
phase loss
frequency
Data
Disable Disable Disable
= 0
Disable
Use the factory
default
Data = 1
user
Enable Enable Enable
Enable
Use the
setting
Examp
decima
expressi
(19)
le
l
of
Enable (1)
Use the factory
Disable (0)
Enable (1)
Enable (1)
on
default (0)
Summary of Contents for FRENIC-Multi series
Page 194: ...MEMO MEMO...
