Inverter Overheat Protection; Input Open Phase Protection - Omron VARISPEED F7 User Manual

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.
Related Parameters
Parameter
No.
L8-02
L8-03
Multifunction Outputs (H2-01 to H2-03)
Set Value
20

Input Open Phase Protection

For the Input Phase Loss Detection the drive monitors the DC bus ripple. The drive integrates this ΔV value
6
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
Related Parameters
Parameter
No.
L8-05
Generally it is not recommended to disable this function.
64
6-
Name
Overheat pre-alarm level
Inverter overheat (OH) pre-alarm operation selection
Inverter overheat (OH)
Phase Loss Fault
Signal
DC Bus
Voltage
Fig 6.64 Input Phase Loss Detection
Name
Input open-phase protection selection
Factory
Setting
95°C
3
Function
10 seconds
Factory
Setting
1
Control Methods
Change
during
Open
V/f with
Opera-
V/f Loop
PG
tion
Vector
No A A A
No A A A
Control Methods
V/f Open
V/f with Loop
PG Vector
Yes Yes Yes
L8-06
t
Control Methods
Change
during
Open
V/f with
Opera-
V/f Loop
PG
tion
Vector
No A A A
).
Closed
Loop
Vector
A
A
Closed
Loop
Vector
Yes
Closed
Loop
Vector
A