DAYLIFF DS, Инструкция по установке и эксплуатации, Страница: 11 / 16

9
7. MAINTENANCE
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In order to obtain maximum pump life the number of starts should be controlled
and should not exceed 30 per hour. It is also necessary to start the pump at least
monthly to prevent seizure.
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No regular maintenance is required though periodically, recommended every 3
months, the installation should be inspected to check operating parameters
including running current, water output, closed head pump pressure and water
quality as well as switchgear condition. Rectification should be carried out as
necessary. Interpretations of various operating problems are given in the Fault
Finding Guide.
Ÿ
Also important is a periodic check of motor winding and insulating resistance,
especially if there is an abnormal operating current or voltage reading. For three
phase motors winding resistance between each pair of phases should not
exceed 10%. For insulating resistance a satisfactory reading is >100MOhm
and if below this some deterioration in motor winding insulation, cable integrity
or cable joint security is indicated. Generally it is satisfactory to keep running the
motor until resistance drops to below 0.5MOhm when the equipment should be
removed and checked.
Ÿ
As a rule periodic lifting and checking of borehole installations is not
recommended until an operating fault is noted as equipment is designed for
continuous operation for an indefinite period.