MM30-D
Doc. N° MO-0037-ING
Rev.
4
Date
24.02.2003
Copyright 2010 - Microener
Pag
11
of
36
2.2.3.8 - Limitation of the Starts Number
-
Allowed Number of startings:
St No
= (1-60), step 1 lf
St No
= DIS the number of startings is unlimited.
-
Time interval in
which the StNo is counted:
tStNo
= (1-60)min. step 1 min.
lf during the time “
tStN
” the “
StNo
” is attained, a new start is inhibited for the time “tBst”.
-
Restart Inhibition time
:
tBst
= (1-60)min., step 1min. or Rm
On the set tBst= 0 the inhibition is disactivated
On the set tBst= Rm the inhibition is permanent until the RESET key is operated.
2.2.3.9 - Starting Sequence Control
During start-up of the motor, the unit can control an output relay used to operate the switch-over of
two-step motor starters (star-delta, resistance or impedance, autotransformer, etc...) thus allowing
to automatically manage the starting transition by controlling the following parameters:
-
Switch-over (transition) current
:
ITr
= (0.1-1)Ist, step 0.1Ist
-
Maximum switch-over (transition) time delay
:
tTr
= (0.5-50)s, step 0.1s.
At motor start counting of “
tTr
“ begins. If during “
tTr
” the motor current drops below “
ltr
“,
switching-over is operated; if mo
tor current stays above “
ltr
“ longer than “
tTr
“, the Locked Rotor
element is activated.
