Selection of Options
‑115‑
Then, calculate the motor overload protection gain from the following formula: F9‑01
= Desired overload protection time / Corresponding overload protection time = 2 / 5 =
0.4.
Note: Set F9‑01 (Motor overload protection gain) properly based on the actual overload ca‑
pacity. If the value of F9‑01 (Motor overload protection gain) is set too high, the motor may
be damaged because the motor overheats but the AC drive does not report the alarm
timely.
When the motor overload detection level reaches the value of F9‑02 (Motor overload
pre‑warning coefficient), the DO or fault relay outputs the motor overload pre‑
warning signal. The value of F9‑02 (Motor overload pre‑warning coefficient) is the
percentage of the time duration during which the motor runs continuously without
reporting the overload fault.
On the condition that F9‑01 (Motor overload protection gain) is set to 1.00 and F9‑02
(Motor overload pre‑warning coefficient) is set to 80%, when the motor running
current reaches 145% of the rated motor current and the motor runs at this level for
4.8 minutes (80% x 6), the DO terminal or fault relay outputs the motor overload pre‑
warning signal.
The motor overload pre‑warning function enables the AC drive to send a warning
signal to the control system through the DO before motor overload protection. It is
used to determine how early to send the pre‑warning signal before the motor
overload protection. The higher the value is, the later the pre‑warning signal is sent.
When the accumulative output current of the AC drive is higher than the value of the
overload time (value Y of motor overload protection inverse time‑lag curve)
multiplied by F9‑02 (Motor overload pre‑warning coefficient), the multi‑functional DO
terminal of the AC drive outputs a motor overload pre‑warning signal.
When F9‑02 is set to 100%, the motor overload pre‑warning and the motor overload
protection are performed simultaneously.
4.2 External LCD Operating Panel
SOP‑20 is an external operating panel provided by Inovance for the AC drive. It adopts
the LED display and has the same operation mode as the operating panel on the AC
drive. It is optional and easy for commissioning. Its appearance and mounting
dimensions are shown below.
To Next Page
Loading...
