Some Safe Tips When Use Of Small Submersible Fire Pumps

Small submersible fire pump is compact and lightweight characteristics, it plays an important role in farm irrigation and domestic water. When use should note the following:

You must install leakage protection. Submersible fire pump underwater work, easy to leakage caused by power loss and even lead to electric shock. If you have leakage protection, as long as the submersible pump leakage current exceeds a certain value (generally not more than 30 mA), leakage protection submersible pump will cut off power to avoid electrical waste of energy, to ensure safety.

When you install submersible fire pump cables to overhead power lines not too long. Do not force the cable into the water or proposed submersible pump, the power cord to avoid breakage. Do not sink into the mud when the submersible fire pump to work, otherwise it will lead to poor motor heat and burn out the motor windings. When installed, the motor insulation resistance of not less than 0.5 megohms.

Try to avoid abnormal power supply voltage. Power supply voltage and rated voltage can not be a difference of 10%, excessive voltage will cause the motor to overheat and burn out the winding, low voltage, the motor speed decreases, such as less than the rated speed of 70%, start centrifugal switch closes, causing long start winding is energized to generate heat and even burn winding and a capacitor.

Do not frequently switch motor. Because it will produce reflux pump stopped, if start immediately, will start the motor load, leading to start winding current is too large to burn. fire pump packages

Should find out the direction of rotation of the motor, there are now many types of submersible pumps when the water being Jieke forward and reverse, but reversed the small amount of water, current, motor reverse a long time will damage the motor windings.

Not let the pump long-term overload, do not smoke sediment large water pump dehydration running time not too long, in order to avoid the motor overheating and burning. Unit in operation, the operator must always observe the value of the operating voltage and current is specified on the nameplate, do not meet the motor should stop running, find out the reasons and troubleshooting.

ZHEJIANG BETTER PUMP CO., LTD mini ABB constant pressure water supply system in the vegetable greenhouses Drip Irrigation

With the off-season vegetables, fruits and recognized public today, the greenhouse, the case of the growing soilless cultivation techniques of cultivation play a leading role in the process of pumping system put forward higher requirements. diesel fire pump

For some water-loving, thermophilic, hi gloss vegetables, soil less stringent requirements, but in order to obtain high yield, promote good root development, should choose deep soil, good drainage, fertile loam rich in organic matter. For example, tomatoes and other vegetables, both need more water, but often do not have a lot of irrigation, soil moisture generally 60 to 80% air humidity of 45 to 50% is appropriate. Usually after planting irrigation water Huanmiao 1, flowering shrub once every 7 days water, irrigation lies in 6-7m3 / acre. Into the fruit enlargement period, every 4-7 days, once irrigation, irrigation hands of 10-15m3 / acre.

In areas where conditions permit, can also be based on water evaporation outdoor weather station 1/2 guidance irrigation. Greenhouse tomato growth period irrigation water 120-150m3 / acre. As a result, ZHEJIANG BETTER PUMP Small ABB pump constant pressure water supply system, water supply in these different periods of change, the change is large difference in time to achieve a true unattended automated management.

Principle words: ZHEJIANG BETTER PUMP Small ABB pump constant pressure water supply system consists of pumps, PLC, ABB inverter, control systems, pressure sensors and other components to form a closed feedback control system. When the PLC receives the pressure sensor signal simulation, feedback to ABB inverter, inverter operation and controls the frequency of the motor to start the pump, according to the signal into a frequency 0-50Hz, when the frequency increases pressure drop, increases the pump speed increase head, flow rate, pressure reaches the set frequency unchanged. After the same frequency 30S, frequency begins to drop until it stops. Meanwhile, PLC electrical signal is received before the pressure is controlled by the PLC time, Tingri boot time, accurate to the second.