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1-7
Chap. 1
BEFORE U
S
IN
G
THE IN
VE
R
T
ER
Power
supply
voltage
Nominal applied
motor
(HP)
Inverter type
HD/MD/
LD mode
Rated current of
MCCB and
RCD/ELCB (A)
Three-
phase
Single-
phase
w/ DCR w/o DCR
460 V
125
50
FRN125G1S-4U LD
200
--
FRN150G1S-4U
HD
150
MD/LD
250
60
FRN200G1S-4U
HD
200
MD/LD
300
FRN250G1S-4U
HD
250 75
MD/LD
350
FRN300G1S-4U
HD
300
100
MD/LD
500
FRN350G1S-4U
HD
350
MD/LD
FRN450G1S-4U
HD
350 -
MD
600
450
125
LD
400
FRN500G1S-4U
HD
450
- MD
800
150 FRN600G1S-4U HD
Power
supply
voltage
Nominal applied
motor
(HP)
Inverter type
HD/MD/
LD mode
Rated current of
MCCB and
RCD/ELCB (A)
Three-
phase
Single-
phase
w/ DCR w/o DCR
460 V
500
150 FRN500G1S-4U LD
800
--
- FRN600G1S-4U
MD
150 FRN700G1S-4U HD
600
200 FRN600G1S-4U LD
1200
- FRN700G1S-4U
MD
200
FRN800G1S-4U HD
700
FRN700G1S-4U LD
-
FRN800G1S-4U
MD
800 250
LD
FRN900G1S-4U
HD
900 300
LD
1400
FRN1000G1S-4U
HD
1000 400
LD 1600
If no zero-phase current (earth leakage current) detective device such as a ground-fault relay is installed in the upstream
power supply line in order to avoid the entire power supply system's shutdown undesirable to factory operation, install a
residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB) individually to inverters to break
the individual inverter power supply lines only.
Otherwise, a fire could occur.
(6) Magnetic contactor (MC) in the inverter input (primary) circuit
Avoid frequent ON/OFF operation of the magnetic contactor (MC) in the input circuit; otherwise, the inverter failure may
result. If frequent start/stop of the motor is required, use
FWD
/
REV
terminal signals or the
/
keys on the inverter's
keypad.
The frequency of the MC's ON/OFF should not be more than once per 30 minutes. To assure 10-year or longer service life of
the inverter, it should not be more than once per hour.
• From the system's safety point of view, it is recommended to employ such a sequence that shuts down the
magnetic contactor (MC) in the inverter input circuit with an alarm output signal
ALM
issued on inverter's
programmable output terminals. The sequence minimizes the secondary damage even if the inverter breaks.
When the sequence is employed, connecting the MC's primary power line to the inverter's auxiliary control power
input makes it possible to monitor the inverter's alarm status on the keypad.
• The breakdown of a braking unit or misconnection of an external braking resistor may trigger that of the
inverter's internal parts (e.g., charging resistor). To avoid such a breakdown linkage, introduce an MC and
configure a sequence that shuts down the MC if a DC link voltage establishment signal is not issued within three
seconds after the MC is switched on.
For the braking transistor built-in type of inverters, assign a transistor error output signal
DBAL
on inverter's
programmable output terminals to switch off the MC in the input circuit.
(7) Magnetic contactor (MC) in the inverter output (secondary) circuit
If a magnetic contactor (MC) is inserted in the inverter's output (secondary) circuit for switching the motor to a commercial
power or for any other purposes, it should be switched on and off when both the inverter and motor are completely stopped.
This prevents the contact point from getting rough due to a switching arc of the MC. The MC should not be equipped with any
main circuit surge killer.
Applying a commercial power to the inverter's output circuit breaks the inverter. To avoid it, interlock the MC on the motor's
commercial power line with the one in the inverter output circuit so that they are not switched ON at the same time.
(8) Surge absorber/surge killer
Do not install any surge absorber or surge killer in the inverter's output (secondary) lines.
Содержание FRENIC-MEGA
Страница 36: ...2 6 Unit inch mm Refer to Section 2 3 3 9...
Страница 208: ...5 89 Examples of Sequence Circuits 1 Standard sequence 2 Sequence with an emergency switching function...
Страница 356: ...MEMO...
Страница 358: ...Fuji Electric Co Ltd Fuji Electric Corp of America http www fujielectric com fecoa 2011 04 D11 D10...