THE SM32 ADVANTAGE

SM32 is suitable to power supply both single and multiple inverter systems parallel connected to a common DC link. The precharge of the leveling capacitors, which can be set via internal dip-switches, is performed by partializing the Mains voltage via an input thyristor bridge.
A diagnostic circuit allows to set the delay time for the switching off of the power thyristor during a power dip.

FEATURES

- Selection of the delay time for the thyristor switching off during a power dip (7 times, from 1.1
  to 7.7 ms ± 10%) which can be selected via the dip-switches.
- Selection of the undervoltage threshold according to the power supply voltage (3 voltages:
  <_370 VDC, <_ 300 VDC and <_ 80 VDC) which can be selected via the dip-switches
- Selection of the precharge time for the leveling capacitors (5 times, from 2 to 18 seconds ±
  15%), which can be selected via the dip-switches
- Selection of the power supply mains frequency: 50 or 60 Hz
- Enabling, via the terminal strip, of the precharge delay.

Inputs/Outputs
- Relay outputs: 1 drive OK contact (normally open, closed after the precharge)
- 2 digital outputs: MLP signal (sum of the precharge and of the set undervoltage threshold) and
  ML signal (Mains voltage monitoring).

Environmental Conditions
- Ambient temperature: from 0 to 55°C, if the temperature is higher than 40°C, reduce the current
  by 1.25% every K.
- Humidity: from 5% to 85%, 1 g/m3 up to 25 g/m3 without condensing or ice formation.
- Altitude: up to 1000 meters on the sea level; if such value is exceeded, the current has to be
  reduced by 1.2% every 100-meter increase.

FUNCTIONS

Protective functions: Opening of the OK relay in case of...
- overtemperature
- power supply loss on the regulation card (±15V)
- power supply loss
- completely discharged DC link

OPTIONS

Input chokes
- An input choke is compulsory for the functioning of the SM32 power supply.