1. Go through before installation
Submersible pump installation, first check the pump shaft is flexible, if found that the pump shaft rotation is not flexible, there is impact sound, pump shaft radial shaking, should be excluded after the installation of failure. Second check the water hose is damaged, if there are cracks to be repaired in a timely manner. Third check whether the fastening bolts are loose, tighten the loose bolts. Finally, check the motor winding of submersible pump cable insulation resistance, not only lower than the European 500 billion is allowed to install and use.
2. Right distribution :
Power line should be chosen in accordance with the provisions of the cables to overhead, power line is not too long, if the pump power and the use of distance is far, cable conductor cross-sectional area should be appropriate to increase the joint should be less as far as possible to reduce the line pressure drop. Below 10kW submersible pump can be started directly control equipment, the best use of automatic air circuit breaker, if there be no such appliances, can also be used knife switch, but must install the right fuse according to the working current of the submersible pump. 10kW above the submersible pump should be equipped with a buck starting cabinet to protect the safe operation of the submersible pump. The cable needed to be put into the water pipe flange groove, and waterproof rope the cable is fixed on the output tube. Submersible pump water or water do not make the cable force, so as not to cause the power cable fault, but also to prevent the cable under the well in the process of scratching.
3. Two to have levels of leakage protection measures :
In order to ensure safety, a metal rod with a length of 1m or more as a grounding body of a submersible pump can be buried in the wet ground near the power supply or the water pump. At the same time to install and install leakage protection device. Because submersible pump works under water, easy to leakage caused by power loss or even lead to electric shock accident. If there is a leakage protector, as long as the submersible pump leakage value exceeds the current value of the leakage protector (generally not more than 30 MA), the leakage protection device will cut off the power supply of submersible pump, to avoid leakage, to ensure safety.
4. Check the motor rotation direction before entering the water :
Because there are many types of submersible pumps are now turning and reversing all available water, but the reverse is a small amount of water, a large current, and its reverse time will damage the motor windings. Therefore, the submersible pump into the water before the first power check to check the direction of rotation is correct. If the three-phase submersible pump impeller upside down, should immediately stop, replace the cable in the three-phase core wire can be any two phases of the contact.
5. The installation position of the submersible pump should be correct :
Submersible submersible pump depth should be 0.35 ~ 3M, the deepest shall not exceed 10m; dry, semi dry, water filled submersible pump, diving depth of 1m, too deep will affect the mechanical seal. Submersible pump to dive into the water, should be lifted vertically, not lying, not stuck in the mud, otherwise it will lead to poor motor cooling motor windings burned. Submersible pump in the well in the process when the stuck phenomenon should lift a little, gently rotating the pallets try to fall, if measures are not effective, had no choice but to submersible pump out of the well and find out the reason to be well. Submersible pump for water, in the water filter out the best set of baskets or barbed wire. Otherwise, weed dirt into the pump will clog impeller or inlet.
Of a small submersible pump, because many for temporary installation, water hose is connected to the submersible pump outlet connector, be sure to with clamp or No.8 wire fasten fastening to prevent loosening or leakage. Installed after the hoisting cable and hose is fixed, can not let the hose is subjected to a tensile force, otherwise, the resulting loose hose break or joint. Place or hang out of the water, the diameter of 4mm wire rope, slowly the submersible pump into the water or water.
7. Installed to test insulation resistance:
The end of the installation of the electric pump, with the 500V Mega ohm meter measuring the insulation resistance between the winding and between the winding and the ground shall not be less than 0.5M.
8. Set the safety warning signs to prevent the occurrence of accidents, should be set up in the vicinity of the submersible pump obvious warning signs. In order to ensure safety, no personnel, livestock in the vicinity of the submersible pump contact with water.
