MICROENER MM30-D - Starting Sequence Control; Limitation of Starts Number; Starting Sequence Control Parameters

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 motor current stays above “ ltr “ longer than “ tTr “, the Locked Rotor
element is activated.