Amtech
7.2
7
PCA-123/124/127 Bleeder board equalizes the dc bus voltage across the series capacitors.
7-7 RC Snubber Board
PCA-82 is snubber board for the input diode. It is a combination of R and C connected across the dc
bus.
7-8 MOV Board
PCA-77 is connected at the input of the unit. It protects the unit against the surge / voltage transients
coming in the power lines.
7-9 Interface Board for Multiple Inverters Unit
The Interface Board PCA-2013A/ PCA-2049A is used when multiple inverter units are connected in
parallel.
It
uses 32-bit High-Performance Digital Signal Processor TMS320F2811.
This board has a facility up to five no’s of inverter units are connected in parallel. This board has an
eight channel of temperature measurement and five channel of three phase current measurement.
7-10 Thyristor Firing Board (PCA-152)
PCA-152 is used to control thyristors in half controlled rectifier. This board also has a MOV network to
protects the unit against the surge / voltage transients.
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