How many kinds of pumps are there? What are the advantages of soft start?
Soft start is prepared, hard start is not prepared, the machine suddenly can not stand! Ha-ha
Start the pump direct start, soft start and step-down start, starting four, direct start motor is generally suitable for small power, we usually use, at 15kw below the pump price; Step-down start is the star delta conversion is started, start is two times speed to reach the rated speed of the general. Using the above 18.5kw, the pump price moderate; soft start is gradually increased to the rated speed of the pump, the impact is very small, the price is relatively high, generally 3 times the step-down start; is the most advanced frequency conversion start, not only have advantages of soft start, also can be set to work at any speed, there are significant effect on energy saving.
The starting modes of water pump are direct start, star triangle start, reactance start, soft start, step-down start and frequency conversion start.1, direct start, generally suitable for small power motors, generally only in the following 15kw pumps, cheap;2, the buck start is the star triangle conversion start, that is, the start is accelerated two times to reach the rated speed, generally in more than 18.5kw pump use, moderate price;3, soft start is gradually increased to the rated speed, the impact on the pump is very small, the price is relatively high, is generally 3 times the buck start;4, the highest frequency conversion is started, in addition to the advantages of soft start, but also can be set at any speed work, energy saving has significant effect.Advantages of soft start:1, the output torque of the motor can meet the requirements of the starting torque of the mechanical system, ensure smooth acceleration, smooth transition, and avoid the impact of destructive torque;2, the starting current to meet the requirements of the motor capacity, to avoid motor heating, causing insulation damage or burnout;3, make the starting current to meet the grid power quality related standards requirements, reduce voltage sag amplitude, reduce the higher harmonic content.
