Servo Controled Voltage Stabiliser

We are offering servo controled voltage stabiliser.
single phase servo stabilizers ac motor operated variac type
technical information :
 capacity : 1kva to 15 kva .
 input v: 170 to 270 v (optional 140 v to 280 v (1- phase) as
extended range.
 output v : 230 + -1 %v
 reset: auto
 under volt trip: below 21ov output volts.
 over volt trip: at above 250v output volts.
 time delay: 10 to 15 seconds.
 voltmeter: at output v, side.
 led indication: at out of input acceptance voltage range.
 voltage regulation : +­ 1% output.
 distortion generated by stabilizer : nil.
 trip levels : +­ 10% of set output voltage
 protection delay time : 4-5 secs.
 over load protection : glass fuse at input .
 efficiency : 98% minimum.
 output voltage adjustments : +15v to –15v [optional]
protections:
under voltage : by electronic control circuit.
over voltage : by electronic control circuit.
over load : by electronic control circuit.
[optional]
short circuit : by mcbmccb.
surge current supperssor : on request.
correction limit : by electronic sensors.