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LT4B-D Reverse Type Starters
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The electromagnetic starters LT4 Dxx series are devices used for direct start,reverse start and protection of induction motors with short connected rotor.They are a combination of two contactors LT1 Dxx series supplied with two buttons"start" and one "stop" fabric cabled.They provide the unwinding of the motor in one of the directions with possibility for pushing the button"stop" and giving command from the other"start "for changing the motor winding directions.The two contactors are mechanically blocked and do not allow simultaneous start in both winding directions.The starters are offered"closed type in metal boxes providing the corresponding IP code from dust and moisture(IP54) as at mounting there should be provided protection of the device from short " circuit through breakers or disconnectors.The starters are offered with mounted thermal protection which can be substituted according to the motor power.The choice of a suitable protection prevents motors operation at unusual temperature conditions and guarantees maximum constant operation,increases the effectiveness and prolongs the term of exploitation .If necessary,at order the power supply operating voltage of the pneumatic starter can be changed.

Functions
switching on alternating current three phase motors in one winding direction,switching off and change of the winding direction at giving a signal
does not allow secondary unwarranted switching on of the starter at transitory lowering of the voltage
protects the motor from overload in the range of the corresponding thermal protecion
remarkablewith high reliabillity of current characteristics

Technical Data
* Rated voltage of the controlling voltage:400VAC;50/60Hz
Note:In case you need different controlling coils voltage of the starters you can trun to our regional representatives.
* Rated operating voltage:690V
* Rated operating current range:from 7 to 93A AC
* Insulation voltage:>690V
* Surge voltage wear resistance: 6000v
* Joining terminal :screw terminal
* Little power consumption and small dimensions
* Connecting:
- flexible or rigid conductors with or without cable terminal for joining to the consumer and section according to the motor power
- three by three inlets/outlets supplied with orifices for the cables
* Possibility for operation at higher frequency
* IP code :IP 44
* Mounting:
- mounting to a flat surface(wall) with bolts/screws
- mounting position:vertical gradient-maximum 5
* Plastic:wear resistance of UVrays and non-flammable(self-extinguishing material)
* The metal body is covered with corrosion-proof paint
* Ambient temperature: -10+60
* Altitude:up to 2000m

Type designation(with a box) Rated capacity kW Rated current Coil voltage(VAC)
220V/230 380V/400V 415V 440V
LT4B-D25A 11 15 15 15 25A 400
LT4B-D32A 15 18.5 18.5 18.5 32A 400
LT4B-D40A 18.5 22 22 22 40A 400
LT4B-D65A 30 55 55 55 65A 400
LT4B-D95A 37 75 75 75 95A 400


Type designation(with a box) Overall dimensions(mm)
heighet width depth
LT4B-D25A 370 240 160
LT4B-D32A 370 240 160
LT4B-D40A 470 265 160
LT4B-D65A 470 265 160
LT4B-D95A 470 265 160
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