Yaskawa VS-616G5 Series Revision F Programming Manual - Manual (Page 103)

VS-616G5 Programming Manual 103
When operating several motors with one inverter, install a thermal relay on each motor. In this case, set
parameter L1-01 to “0”.
Setting Range: 0.1 to 20.0 minutes
<1110>
Factory Default: 8.0 minutes
Sets the amount of time that the motor withstands 150% overload, when the motor is operated continu-
ously at rated current. This value should be set according to the overload resistance of motors used.
Notes:
1. If the motor is running at 100% output current or less, the electronic thermal overload relay
will not trip. (continued next page)
2. If the motor is run continuously at 150% output current, the electronic thermal overload relay
will trip after one minute if the motor is started “hot”, and after eight minutes if the motor is
started “cold”.
L2 Power Loss Ridethrough
When momentary power loss occurs, operation can restart automatically, according to the setting of
the following parameters.
Selects whether the inverter stops when power loss is detected or “rides through” a momentary power
loss. When ridethrough operation is selected, speed search starts from the current output frequency.
L1-02 Motor Protection Time Constant MOL Time Const B B B B
L2-01 Momentary Power Loss Ridethrough Selection PwrL Selection B B B B
Setting Description
0 Momentary power loss ridethrough is disabled (factory default).
When momentary power loss is detected, a fault contact trips,
stopping the inverter.
1 Momentary power loss ridethrough is enabled, for the time set in
L2-02
. When momentary power loss is detected, a fault contact
does not trip. If power is not restored within the time set in L2-02, a
fault contact trips, stopping the inverter.
Figure 49 Electronic Thermal Overload Curve
min
%
Motor Rated Current (E2-01)
“Cold” Start
“Hot” Start
Operating
Time
10
7
3
1
0.4
0 100 150 200
(when L1-02 = “1.0”)
Section L: Protection Parameters
L1 Motor Overload