Use Of S3 Switch; Use Of S4 And S5 Dip Switch; Use Of Cv Jumper - gefran SM32 Manual De Instrucciones

3.4. USE OF S3 SWITCH

The S3 switch is able to set the precharge time for the DC link capacitors (the higher
precharge time, the lower will be the current during the precharging phase to the
supplied capacitors).
Time (Seconds)
18 s +/-15%
11 s +/-15% (Default)
7 s +/-15%
4 s +/-15%
2 s +/-15%
Use the following way to select the precharge time:
1) Set all the switches in off position (18-seconds ramp time), use a current probe able
to detect a current peak ≤ ≤ ≤ ≤ ≤ 10mS between the C or D terminal of the DC-LINK.
2) At this point read the measuring of the maximum peak current present on the DC-
LINK during the precharging phase.
3) If the measured peak current is much lower than twice the value of the SM-32 rated
current, it is possible to select the switch for a lower ramp time (SW3.4 - 8- second
ramp time). Go back to point 2.
Such operation will be repeated till the measured peak current is equal or lower than twice
the value of the converter rated current.

3.5. USE OF S4 AND S5 DIP SWITCH

The S4 and S5 dip switches are used to select the AC mains frequency.
AC Mains frequency
50 Hz (Default)
60 Hz

3.6. USE OF CV JUMPER

(See the ML signal function)
With "CV" jumper mounted (on), the signal available on the terminal 36 will be LOW with
AC mains voltage lower than the undervoltage threshold (see figure 3). It will be HIGH,
with AC mains voltage higher than the undervoltage threshold.
With "CV" jumper open (off), the signal on the terminal 36 will indicate, with an impulse
of about 150ms, (low level signal) that the power supply voltage has had a transition at a
level lower than the undervoltage threshold.
—————— INSTRUCTION MANUAL——————
S3.1 S3.2
OFF OFF
OFF OFF
ON OFF
OFF ON
OFF OFF
S4-1...4
OFF (50 Hz)
ON (60 Hz)
S3.3 S3.4
OFF OFF
ON OFF
OFF OFF
OFF OFF
OFF ON
S5-1...4
OFF (50 Hz)
ON (60 Hz)
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