LT4B-D Reverse Magnetic Starters

Rated operating voltage:690V Rated operating current range:from 7 to 93A AC Insulation voltage:> 690V IP44

LT4B-D Reverse starter/electromagnetic starters/contactor starter

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 remarkable with 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: -10oC~~+60 oC* 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

LT4B-D Reverse Magnetic Starters