71 • Control Keypad
________________________________________________________________________________________________
MAIN PARAMETERS
- **** -
Displays in MINIMIZED MODE and MAXIMIZED MODE
Display and Default
Values
Range Description
Remarks
STORE ENABLE
MAIN PARAMETERS
Storing
modified
parameters
To store selected parameters scroll through all
parameters until you reach STORE ENABLE
MAIN PARAMETERS, then press the
Store
key.
After you store a parameter successfully the
DATA SAVED OK message will display.
If RVS-DN fails to store the parameter the LCD
Will display the STORAGE ERROR message
(refer to section
9 on page 95 for more details).
Note
:
Pressing the
Store
key when the STORE
ENABLE XXXXX PARAMETERS message does
not appear on the display has no effect.
7.7.2.1
Overload Calculation
Note:
In the overload procedure measurement of the current is limited to 5 x motor FLA to prevent saturation from
affecting the calculation. Therefore the trip time at 5 x motor FLA will be identical to the trip time at 8 x motor
FLA.
The
approximate
trip time is calculated as follows:
where:
OLT
represents
O
ver
L
oad
T
rip setting – (default = 115%).
OLD
represents
O
ver
L
oad Trip
D
elay – trip delay at 5 x Motor FLA, (default = 4 sec).
Example 1:
Motor FLA = 80A, actual current = 120A.
I
%
= 120 x 100 / 80 = 150%
If settings are as in the default then:
Example 2:
The same motor and setting, but the current is 400A.
I
%
= 400 x 100 / 80 = 500%
If settings are as in the default then
Example 3:
Motor FLA = 80A, actual current = 200A, Overload Delay (OLD) = 10
I
%
= 200 x 100 / 80 = 250%
[seconds]
6
OLD
OLT
I
000
,
375
,
1
Time
Trip
O/L
2
2
%
×
−
=
FLA
motor
100
Current
Actual
I
%
×
=
sec.
99
6
4
15
1
50
1
000
,
375
,
1
Time
Trip
O/L
2
2
=
×
−
=
sec.
4
6
4
15
1
500
000
,
375
,
1
Time
Trip
O/L
2
2
=
×
−
=
sec.
47
6
10
15
1
250
000
,
375
,
1
Time
Trip
O/L
2
2
=
×
−
=
