Installation of submersible shaft (mixed) flow pump
According to the installation drawings, please verify the dimensions of the civil works, then install the shaft with a crane, and install it piece by piece from bottom to top. As well as the installation of the water outlet, the wall pipe, and the pontoon flap door, pay attention to the sealing of the flange surface.
The boom is fixed to the electric pump unit, and the electric pump is lifted and slowly goes down into the wellbore. When the electric pump is submerged in the wellbore, bind the cable with a wire or cable tie to the boom firmly, tying it once every 40 cm, and slowly go down the well while tying it. , Until it fits correctly with the sealing frustum, and fix the boom and the cross arm with clamps. Lift the blind cover, pass the cable through the sealing hole, do a flange seal and cable seal to complete the entire installation.
Connect the outgoing cables to the electric control cabinet in the correct order. Use a megohmmeter to check that the three-phase line-to-ground insulation is greater than 50 megohms before wiring. If the distance is far, a terminal box can be added to facilitate detection and enter the trial run stage.
Commissioning and operation of submersible shaft (mixed) flow pump
First, check whether the water level is within the specified range, check whether the flapping door can be opened and closed freely, check the three-phase power supply and voltage of the electric control cabinet, and start the vehicle after it is correct. Step-down start, the switching time is adjusted between 6s-9s, instant start and observe the voltage drop. If it is too low, it will cause difficulty in starting. After starting, observe the ammeter to check whether the three-phase current is average, whether the swing is too large, whether the water outlet is normal, and the sound Whether it is normal; usually, the operating current of the electric pump should be 80-90% of the rated current of the motor. After running smoothly, adjust the over-current setting to 1.1 times of the rated current. During debugging, reduce frequent starts. The interval between each start is 15min. The submersible shaft flow start is the load start. The start current is 6 times the rated current. Frequent starts have been caused. The overheating of the motor reduces the insulation and affects the service life.