In order to guarantee the system normal operation, maintenance manager's pressure is very big.Their success depends on the need to focus on electrical system of the motor, the motor from the pump to the conveyor belt, to the grinding machine, HVAC and fan powered equipment.
Every minutes of downtime is a loss.Unscheduled shutdown is hard to calculate the cost, but often very large again.For some industries, the annual costs may account for 1% and 3% of the income (profit may be 30% to 40%).
Two common methods of system maintenance is failure after repair and preventive maintenance.
- After fault maintenance method, the motor control system.Failure occurs when the motor, need time to be repaired and put into operation again.
- In the preventive maintenance method, the control system of shutdown maintenance manager.Machine maintenance is planned, avoid unnecessary system shutdown.
The following is an example of fault after maintenance methods:
- Prior to installation, the motor insulation test;
- Then no longer test until motor failure;As well as
- Motor to stop service, winding, test and reinstall again.
Failure caused by unexpected stop production.The failure of the true costs of loss not only limited to the maintenance of the motor, half up to buy a new motor, including loss of production time and waste of human cost.
To prevent motor shutdown
The machine for maintenance on a regular basis test can provide valuable degradation state information, help to predict possible system failure.Preventive maintenance can reduce the equipment failure, and prolong service life.Insulation resistance tester可用于确定电机、变压器、开关设备和电气安装中绕组或电缆的完整性。
Regarding motor insulation, we know that with time and use, the performance will decline.Insulation performance degradation or damage will cause leakage current.The leakage flow caused by motor unnecessary wear and tear.
This is a motor in preventive maintenance plan of maintenance records:
- Insulation test on a regular basis;
- Insulating value over time, and decrease;
- When resistance drop below the preset threshold, the specified maintenance plan, in order to plan ahead to cease;
- After maintenance, the motor running again, begin a new cycle of preventive maintenance, and test, insulation test results better than the record for the first time.
A successful transition
From failure maintenance to preventive maintenance including from plans to test to collect data of all kinds of decisions.The following are some of the matters need to pay attention to:
- Test how often depends on the degree of aging and the use of the motor.Plans to ensure that the most frequently used, the operation of the key equipment to get the most frequent maintenance.
- Should be quick to complete the test, the use of easy to use, accurate reading of the tool.Fluke provides three new insulation resistance tester, configuration faster, more secure, wirelessly connected to the smart phones and tablets, effectively reduce the time spent on technical personnel in the danger area.雷竞技appFluke 1555 (up to 10000 V)
- Using the data collected by judge the trend of work as well as the insulation degradation.Fluke of insul雷竞技appation resistance tester is equipped with a Fluke Connect ® technology, overcome one of the biggest obstacles in the implementation of preventive maintenance plan, collect and understand the test data.Before that, the technicians have been using the method of "man - table - pen" to collect data, it is the obstacle of the implementation of preventive maintenance plan.The handwritten data can be very difficult to read, contains the mistakes of the first entry, as well as the data is input to the storage system.
- Through the insulation resistance test data retrieval, determine when to motor maintenance.Using a smart雷竞技appphone or tablet on the Fluke Connect applications, technical personnel to be able to configure test tools, test and control then simply press a button, instantaneous can begin to collect and store the results to the cloud, this is a permanent storage and analysis method, no mistake.In addition, with the test results also hold equipment related information.Date, time, work order, and so on.
conclusion
Preventive maintenance, including insulation resistance testing, maintenance manager better control motor system.Motor insulation performance will decline, need to maintain at some point in time.Through preventive maintenance, maintenance manager can completely control the timing of the maintenance.
