6-64
6
îš‹ Inverter Overheat Protection
This function provides overheat protection for inverter-mounted braking resistors (Model: ERF-150WJ ).
When overheating of a mounted braking resistor is detected, an fault RH (mounted braking resistor overheat-
ing) is displayed on the Digital Operator, and the motor coasts to stop.
The fault can be output using one of the multi-function digital outputs as well. Therefore one of the parameters
H2-01 to H2-03 has to be set to D.
îš„Related Parameters
Multifunction Outputs (H2-01 to H2-03)
îš‹ Input Open Phase Protection
For the Input Phase Loss Detection the drive monitors the DC bus ripple. The drive integrates this ΔV value
over 10 scans (approximately 10 seconds). If the integrated ΔV value of any consecutive ten scan range is
greater than the voltage determined by multiplying L8-06 times the drives rated OV Trip point (410Vdc/
820Vdc), a PF fault will occur and the Drive will coast to stop
Fig 6.64 Input Phase Loss Detection
îš„Related Parameters
Generally it is not recommended to disable this function.
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-02 Overheat pre-alarm level 95°C No AAAA
L8-03 Inverter overheat (OH) pre-alarm operation selection 3 No A A A A
Set Value Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
20 Inverter overheat (OH) Yes Yes Yes Yes
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-05 Input open-phase protection selection 1 No A A A A
t
L8-06
Phase Loss Fault
Signal
DC Bus
Voltage
10 seconds
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