Fuji Electric frenic mini series - Page 182

8.8 Details of Protective Functions
8-35
Chap. 8 SPECIFICATIONS
Name Description
LED
monitor
displays
Alarm
output
[30A/B/C]
Related
function
code
Inverter
• Stops the inverter output upon detecting excess
heat sink temperature in case of cooling fan failure
or overload.
J Yes H43
Overheat protection
Braking
resistor
• When the built-in or external braking resistor
overheats, discharging and the operation of the
inverter are stopped.
* It is necessary to set the function code data
according to the braking resistor used (built-in or
external).
FDJ Yes F50, F51
Overload
protection
Stops the inverter output if the Insulated Gate
Bipolar Transistor (IGBT) internal temperature
calculated from the output current and cooling fan
temperature detection is over the preset value.
NW Yes ---
In the following cases, the inverter stops running the
motor to protect the motor in accordance with the
electronic thermal overload protection.
Electronic
thermal
overload
relay
• Protects general-purpose motors over the entire
frequency range.
• Protects inverter motors over the entire frequency
range.
* The operation level and thermal time constant can
be set.
N Yes F10
F11, F12
PTC
thermistor
A PTC thermistor input stops the inverter output for
motor protection.
A PTC thermistor is connected between terminals
[C1] and [11], and a 1-k: external resistor is
connected between terminals [13] and [C1].
J Yes
H26,
H27
Motor protection
Overload
early
warning
Outputs a preliminary alarm at a preset level before
the motor is stopped by the electronic thermal
overload protection for the purpose of protecting the
motor.
--- ---
E34,
E35
Stall prevention
Operates when instantaneous overcurrent limiting is
active.
Instantaneous overcurrent limiting:
Operates if the inverter's output current exceeds the
instantaneous overcurrent limit level, avoiding
tripping of the inverter (during constant speed
operation or during acceleration).
--- --- H12
External alarm
input
Stops the inverter output with an alarm through the
digital input signal (THR).
J Yes
E01 to
E03,
E98,
E99
Alarm relay
output
(for any fault)
The inverter outputs a relay contact signal when the
inverter issues an alarm and stops the inverter
output.
< Alarm Reset >
The alarm stop state is reset by pressing the
key
or by the digital input signal (RST).
< Saving the alarm history and detailed data >
The information on the previous 4 alarms can be
saved and displayed.
--- Yes
E20,
E27,
E01 to
E03,
E98,
E99
"---": Not applicable.