LT3-D Star Delta motor starter

LT3-DStar & Delta type starter/electromagnetic starter/motor starter

The electromagenetic starters LT3 Dxx series are devices designed for remote control,direct control and protection of induction motors coiled and operating according to a starter scheme"star/delta" .They are a combination of three contactors LT1 Dxx   series,time relay and a set of buttons "start" and "stop" fabric cabled.They provide the easy motor unwinding giving possibility for setting the time for  unwinding in "star" as the time for switching between "star" and "delta" is fixed to 0.5 seconds.

The starters are offered on the market in two types:
- closed type LT3B-D-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
- open type LT3-D-for mounting in distribution boxes as at mounting there should be provided protection of the device from short circuit through breakers or disconnectors
The starters are offered on the market without mounted thermal protection which is purchased separately according to the motor capacityThe choice of a suitable protection protection which is purchased separately according to the motor capacity.The choice of a suitable protection prevents motor's operation at unusual temperature conditions and guarantees maximum constant operation,increases the effectiveness and prolongs the term of exploitation.If necessary,at client's order the power supply operating voltage of the pneumatic starter can be changed.

Functions

switching on/off alternating current three phase motors operating according to a scheme"star-delta"
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 proteciton
indication of the operating condition through a valve indicator
possibility for mounting of additional contacts(for the open type)
remarkable with high reliability of current charateristics

 

Technical Data

* Rated voltage of the controlling voltage:400VAC,50/60 Hz
Note:In case you need different controlling coils voltage of the starers you can turn 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 consumprion 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
* Mounting:
- mounting to a flat surface(wall) with bolts/screws
- mounting position:vertical gradient-maximum ±5°

LT3-D Star Delta motor starter