Need for Pump Protection

Each year, more than 20% of electric motors installed worldwide depletion. This is despite protection systems offered. This demonstrates the inadequacy of the protection systems selected. In most cases, the reasons for the failure of the pumping system are none other than the pumping system itself. These include incorrect selection of the pump, improper system handling, and incorrect selection of protective devices. This article discusses the selection of protective devices. The protective device for the pump is the heart of the whole system. Be careful to make an appropriate selection of these. Different types of protection relays are available for different functions. It is important that an appropriate security device selects the desired function. Incorrect selection of protective devices may lead to the idea that they are not fulfilling their intended functions. Need for protection of the pump: The need for protective devices can not be emphasized enough. It's hard to imagine a pumping system without providing adequate protection against the dangers. Using three-phase motors pumps as main engines must be protected from burning. The main causes of burning engine on wheels: a phase failure) (Single phase) or loss of a phase. b) unbalanced supply. c) Dry running d) Overloading e) Over heating of the windings. f) high / low voltage. Specialized protection against earth leakage, such as humidity, light failure, etc. It may also be necessary for some bombs. Phase failure causes burning engines. Due to the lack of fuses, loose connections or loss of supply phase of the motor supply lines becomes dead. However, the motors continue to run in two phases, taking advantage of strong currents, and exhaustion. RUNNING BACK pump and some machines due to incorrect connections, reverse phase sequence jeopardizes the motor and therefore the machine. Imbalance of supply generates dual frequency currents in the windings of the motor causing the overheating. Unbalanced supply voltage produces strong negative sequence currents. These are dual-frequency components of the source. Increasing the rotor resistance due to skin effect. Motor winding overheating because of this, is distributed unevenly on the rotor. This leads to the breakdown of the insulation. * LOW voltage surges engine in continuous operation and is particularly dangerous when it starts. Engine uses more common in low voltage, RPM, torque and power to be reduced due to low voltage. DRY TIME * is equally dangerous for submersible pumps. The submersible pump motors are designed to run under water. Using water as heat transfer medium. Should the water level goes down and the pump runs dry, the engine overheats and burns. Because dry running bearing temperature also increases, damaging the bearings and the surrounding part of the pump. * Over Load is also one of the main causes of motor burnout. Can occur due to phase fault condition, the condition of running dry or overloading direct condition of the pump. It causes an increased flow resistance, this in turn results in a failure of insulation. Any pump used to transfer water must stop working if it is running empty. This can happen if the water level is below the inlet valve, the suction pipe is leaking and has recovered the air, or starting without priming the pump (for pump priming required) etc. In such conditions, the pump must be stopped immediately to operate despite the continuing lack can be dangerous for the pump. In most cases, however, a bimetal (thermal) overload relay protection is based on the pump. When the electronic relay phase failure protection is used to again is usually a voltage sensing relay. It is especially preferred because it is suitable for any qualifying HP engines and therefore the inventory or storage is not a problem. However, these relays suffer many disadvantages and limitations in comparison with detection relays. Copyright India Pvt Ltd minilec 2011. All rights reserved.

UGG Australia Women Tularosa Boots Black