Pumps Maintenance - Paranaa Pumps

Submersible Pumps

Submersible Pumps are installed in the bores and are hardly accessible for visual inspection. However, one can diagnose troubles by tuning one's ear to accorestical sound produced by discharge line. This can, however, be done by user rather than a trained mechanic as frequency of sound is typical to a typical installation. It is advisable to touch one's ear to delivery line and observe the sound emitted by the pump. In a daily routine inspection following points should be noted

Sound emitted by the pump

Voltage supplied to the pump

Current drawn by the pump

Visual discharge at outlet of the pump if the pump discharges to atmosphere.

The pump should not be operated for more than 2 hours if the panel shows a voltage lesser or higher than the operation voltage limit. This is likely to harm the pump, current drawn at different available voltages for a particular installation should be recorded and checked on daily basis. Any abnormal current drawn by the pump can be a possible cause of trouble.

Visual discharge at outlet of the pump will depend on various factors like voltage available at the site, the depth of water available, and periodic yield of the well.

Periodic Checks

It is better to carry out periodic checks to determine health of submersible and possible troubles. This can be done in the following ways.

a. Install a pressure gauge (make provision while installing submersible). Close fully one outlet of the pump by using a throttle value. Record the pressure gauge reading periodically. Any drop in pressure more than 15% of original value can suggest possible wear to impellers. If further drop takes place then it is better to pull out the pump and examine the impellers for wear.

b. Periodic Inspection should be carried out to determine the insulation resistance of winding. Here are a few general guide lines to possible diagnosis.

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