IST2 control for three-phase Varispeed motors

IST2 control for three-phase Varispeed motors

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IST2 is a tachometric voltage regulator which operates according to the principle of phase partialisation. The voltage generated by silicon-controlled diodes (SCR) is the result of an analogue process which maintains constant motor revolutions by means of differential control  between the actual speed i.e. the tachogenerator voltage signal and the speed set on the potentiometer or by the external analogue signal ( 10 V). The IST2 operates on four quadrants and therefore is capable of generating drive torque and resistant torque in both directions of rotation with considerably high starting torque.

All controls feature galvanic isolation from the mains. The combination with a FAE VARISPEED asynchronous motor makes for an inexpensive, silent running, simple and reliable variable speed drive suitable for applications where rapid acceleration is required even in the case of considerable inertia loads without auxiliary external braking systems such as brake resistors for inverters or DC motor controllers.

IST2 applications as radio frequency filter, built-in or external versions (request filter or specifications when ordering) comply with general product standards regarding conducted emission and conducted susceptibility. As regards susceptibility on control cables, twice the minimum required protection degree is guaranteed for heavy industry; refer to recommendations for power and control cables in the event of problems caused by electromagnetic interference.

DRIVE MODEL	V521 230/400V	V522 230/400V	V523 230/400V	V524 230V
POWER MAX	kW 1,5/2,5	kW 2,5/3,6	kW 3,6/5,2*	kW 5,2*
POWER SUPPLY	standard 230/400 V 3-phase with jumpers for voltage changeover; other power supplies available on request

                                                        * = Version with centrifugal fan

 

SPEED AND ROTATION DIRECTION ADJUSTMENT	Speed and direction adjustment by means of potentiometer or by means of analogue signal 0 / ± 10 V. Internal trimmers for min. and max. speed adjustment within potentiometer operation range. Internal trimmers for 2 pre-set speeds in addition to potentiometer speed settings.
ACCELERATION RAMP     DECELERATION RAMP	Internal trimmer for adjustment of acceleration ramp adjustable from 0 to 5 sec.; other times available on request. Internal trimmer for adjustment of deceleration ramp adjustable from 0 to 5 sec.; other times available on request.
TORQUE LIMIT	Maximum torque settings by means of internal trimmer and torque adjustment by means of potentiometer or external analogue signal.
TACHOMETER RELAY	NO-C-NC contact outputs (2A-250V) ramp start/stop relay adjustable from 0 to 500 rpm.
INDICATOR INSTRUMENT OUTPUTS	0-5 V dc output for digital/analogue speed indicator
INDICATOR LEDS	L.H./R.H. rotation Power supply phase failure Motor tachogenerator signal failure Start/stop with inertia Start/stop with ramp Tachogenerator relay energised

 

DIMENSIONS (mm)	235Lx225hx122p			235Lx425hx 122p
WEIGHT (kG)	2,3	3,3	3,7	5
OPERATING TEMP.	-10°C / +45°C ambient temperature
HUMIDITY	95% maximum (non-condensing)
ALTITUDE	Up to 1000 m without derating
PROTECTION	Metal enclosure with high quality IP20 polycarbonate protection