What are the precautions for the use of submersible sewage pump

Diving sewage pump sewage can be long fiber, cloth, bags, belt, grass and other material tear, cut off, and then discharge smoothly, particularly suited to deliver a hard solid, fiber content of liquid and particularly dirty, sticky and slippery liquid. What are the precautions for the use of submersible sewage pump? Before the pump start-up, should by a qualified electrician to check the system, to ensure that the following all the required electrical protection measures of the following: 1, the pump before the operation, application of 0 ~ 500 and check the motor and relatively insulation resistance by megger are, on the lowest numerical should be greater than 2 m & Omega; ; 2, power supply units should be safe, reliable, normal. Power supply voltage, frequency, should comply with the provisions, The voltage is 380 v & plusmn; 5%, frequency of 50 hz & plusmn; 1%) And voltage instantaneous ultra difference should not exceed 10%. If the power from the water pump use thousands from far away, the cross-sectional area of the cable should be bold, joints should be as less as possible, otherwise it will make the voltage drop too much, and should be in the cable shall be sealed waterproof processing, to prevent leakage. 3, in the four core cable, with the symbol & quot; ┴“; For the grounding line ( General for the yellow green double color line or black line) In order to ensure the safe use, must be firmly grounded, and than the rest of the line out of 50 mm long; 4, when conditions permit, electrical protection device can include: grounding protector, such as leakage cut-out on the ground, but in any case, must be equipped with electric pump and rated current numerical match slowly melt insurance fuse; 5, electrical control device should be dampproof and shaft installed in the area of moistureproof, cable should be careful not to make the wall was laid in the water pump suction entrance; 6, check the rotor rotation direction. After pumps first start or reinstall should check the rotation direction and rotation direction incorrect operation will cause the pump efficiency is reduced, or such as damage to the pump impeller loss. For the determination of the rotor rotation, before the pump installation eventually, more high and inching operation, comply with the following conditions is rotating in the right direction, otherwise, should exchange controller three-phase line in any position of the two wires to change the direction of rotation. 一个。 Look down from the top of the pump, the rotor turns clockwise; B, look from the bottom up (namely the inlet direction) visible leaf counterclockwise direction. Note: if a few on pump connected to the same controller, should be separate checks.
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