MH THYROMAT-BDC, Руководство пользователя

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Revision 8.6
SECTION 3 : HOIST PARAMETERS
37
3.2.16. Ph Shift Off Time
NO PARAMETER DESCRIPTION SCALE INCREMENT DEFAULT
16 Ph Shift Off Tim Phase shifter off time
delay 60
– 240 ms
20 ms 100 ms
This parameter complements parameter 15 above.
Case 1: Maximum drop-out time > the maximum close-in time
In this case the recommended phase shifter off delay time is based on the maximum drop-out time of
the conta
ctor minus parameter 15’s set value. i.e. (Maximum drop-out time) – (parameter 15) =
parameter 16.
As described in the parameter 15 example, the maximum drop-out time for this specific contactor when
adjusted is 180ms and parameter 15 is 100ms.
Therefore: 180ms
– 100ms = 80ms = parameter 16 setting.
Case 2: Maximum drop-out time < the maximum close-in time
In this case the recommended
“phase shifter off delay time” is based on the maximum close-in time of
the contactor plus parameter 15’s set value. i.e. (Maximum close-in time) + (parameter 15) =
parameter 16.
Example:

Reversing contactors LC1-F330

Contactor drop-out time with the LX9-FH coil = 25ms

Contactor close-in time with the LX9-FH coil = 45ms
Since the parameter settings are incremented in 20ms steps the maximum close-in time used is 60ms.
The recommended “phase shifter off time” is therefore 60ms – 0ms = 60ms.
Note
In most cases the default values of both
parameters is sufficient for reliable operation.
As a general rule deviations from the default
values
should only be required when
contactors with current ratings greater than
225A (AC3) which are not equipped with
special fast acting coils, are used. For further
assistance on the correct settings for a specific
contactor
type, contact MH Automation
technical department.