Several forms of fire pump start- up

It's frequently heard that if you have been in a certain assiduity for a long time, you'll know it veritably well. still, in the request of fire pumps, this isn't the case. On the one hand, the technology is streamlined, the fire pump is streamlined veritably presto, on the other hand, itself the fire pump belongs to high- tech products, indeed if the day- to- day contact with people, but also don't really understand the fire pump. For illustration, the fire pump has a aggregate of what start form, do you know?

I.Star- delta starting mode

Star- delta starting mode is simple in structure, cheap, high trustability, for this reason, is extensively used, by reducing the power to reduce the outfit starting current to start the. The current characteristics are veritably good, while the necklace characteristics are poor, so the objective exists only for no- cargo or light- cargo starting occasions.

II. Autotransfer buck starting mode

The autotransformer is used to reduce the starting voltage applied to the stator winding of the motor. After the motor has started, the motor is also dissociated from the autotransformer so that it can move typically at full voltage. This type of reduced voltage starting is divided into two types homemade and automatic control. The different gates of the autotransformer can be named according to the admissible starting current and the needed starting necklace to achieve a step-down launch, and can be used anyhow of whether the motor stator winding is connected in Y or Δ.

III. Soft launch mode

Soft launch is a specialized means to achieve a smooth launch of the motor and mechanical cargo by using voltage reduction, compensation or frequence conversion to reduce the impact of the starting current on the grid and to cover the grid and mechanical system. This form is expensive but provides better protection for the outfit. The voltage is sluggishly raised from zero to the rated voltage, so that the starting current of the motor during the starting process becomes controllable from the willful load shock current in the history. And the size of the starting current can be acclimated according to requirements.

IV. Direct launch mode

The direct launch mode is generally considered for pumps below 15KW and meets the starting cargo of no further than 20 of capacity. The restriction is lesser and the factual use is less.

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