The electromagenetic starters HT3 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 HT1 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 HT3B-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 HT3-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.

■ 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

Note:It is necessary that thermal protection with suitable range is mounted to protect the controlled motor.The shown values of magnetic starters are for normal regimes for motor control,for hard operation regimes are chosen starters which correspond to the current rating of the motor