Fuji Electric FRENIC-ECO, Instruction Manual

Page: 228 / 246

8-17
8.6 Protective Functions
Name Description
LED
monitor
displays
Alarm
output
[30A/B/C]
Overcurrent
protection Stops the inverter output to protect the inverter from an
overcurrent resulting from overload. During
acceleration
0c1
Short-circuit
protection Stops the inverter output to protect the inverter from
overcurrent due to a short-circuiting in the output circuit.
During
deceleration
0c2
Stops the inverter output to protect the inverter from
overcurrent due to a ground fault in the output circuit. This
protection is effective only during startup of the inverter. If you
turn ON the inverter without removing the ground fault, this
protection may not work. (Applicable to inverters of 75HP for
208V, 100HP for 460V or below (3-phase 208 V) or 350HP or
below (3-phase 460 V))
During running at
constant speed
0c3
Yes
Ground fault
protection
Upon detection of zero-phase current in the output power, this
function stops the inverter output to protect the inverter from
overcurrent due to a ground fault in the output circuit.
(Applicable to inverters of 125HP for 208V and 125HP for
460V or above (3-phase 208 V) or 450HP or above (3-phase
460 V))
ef
Yes
During
acceleration
0u1
During
deceleration
0u2
Overvoltage
protection The inverter stops the inverter output upon detection of an
overvoltage condition (400 VDC for 3-phase 208V, 800 VDC
for 3-phase 460V) in the DC link bus.
This protection is not assured if extremely large AC line
voltage is applied inadvertently.
During running at
constant speed
(Stopped)
0u3
Yes
Undervoltage
protection Stops the inverter output when the DC link bus voltage drops below the
undervoltage level (200 VDC for 3-phase 208V, 400 VDC for 3-phase 460 V).
However, if data "3, 4, or 5" is selected for F14, no alarm is output even if the DC
link bus voltage drops.
lu Yes*1
Input phase
loss
protection Detects input phase loss, stopping the inverter output. This function prevents the
inverter from undergoing heavy stress that may be caused by input phase loss or
inter-phase voltage unbalance and may damage the inverter.
If connected load is light or a DC reactor is connected to the inverter, this function
will not detect input phase loss if any.
lin Yes
Output phase
loss
protection Detects breaks in inverter output wiring at the start of running and during running,
stopping the inverter output.
0pl Yes
- Stops the inverter output upon detecting excess heat sink temperature in case
of cooling fan failure or overload.
- Detects a failure of the internal air circulation DC fan and alarm-stops the
inverter
(For models of 50HP or above in 208 V, 75HP or above in 460 V)
0h1 Yes
Overheat
protection
Stops the inverter output upon detecting an excessively high ambient temperature
inside the inverter caused by a failure or an overload condition of the cooling fan.
0h3
Yes
Overload
protection Stops the inverter output if the Insulated Gate Bipolar Transistor (IGBT) internal
temperature calculated from the output current and temperature of inside the
inverter is over the preset value.
0lu
Yes
External
alarm input Places the inverter in alarm-stop state upon receiving digital input signal (THR).
0h2
Yes
*1 This alarm on [30A/B/C] should be ignored depending upon the function code setting.