What is the maintenance of motor?
There are only a few simple rules for the maintenance of these motors: Maintain high insulation resistance at all time and measure the insulation resistance by megger regularly. Keep the bearings lubricated properly and change the bearings at the recommended intervals. Maintain a uniform air gap.
Which of the following can be considered in half yearly preventive maintenance of induction motor?
Clean out and renew grease in ball or roller bearing housings. Clean out magnetic dirt that may be clinging to poles. Check clearance between shaft and journal boxes of the sleeve bearing motors to prevent operation with worn bearings. Clean out undercut slots in the commutator.
How do you protect an induction motor?
Induction motor Protection system from single phasing, over-voltage, under-voltage, overheating and phase reversal provides the smooth running of the induction motor expands its lifetime and also efficiency. Generally, these faults occur when the supply system is violating its rating.
How do you do motor current signature analysis?
The motor current signature is recorded in a time domain format. The current is represented in a graph form with the amplitude shown on the “Y” axis and the time on the “X” axis. The result is a typical current sinewave shown in Figure 1. In order to analyze the data, a Fast Fourier Transform (FFT) is performed.
How do you check electric motor windings?
Inspect the Motor Windings With a Multimeter
First and foremost, you’re going to need a multimeter to test the windings. To begin, set the multimeter to read ohms and then test the motor’s wires and terminal. You should test the windings for a “short to ground” in the circuit and open or shorts in the windings.
How do you inspect a motor?
7 Ways to Ensure Better Maintenance of Electric Motors
- Perform Visual Inspections. A quick visual inspection can reveal some important details about the electric motor. …
- Perform a Brush and Commutator Inspection. …
- Conduct a Motor Winding Test. …
- Check the Bearings. …
- Perform Vibration Tests. …
- Use Infrared Thermography in Predictive Maintenance. …
- Document Everything.
What is 3phase induction motor?
The three-phase AC induction motor is a rotating electric machine that is designed to operate on a three-phase supply. This 3 phase motor is also called as an asynchronous motor. These AC motors are of two types: squirrel and slip-ring type induction motors.
What is preventive maintenance of motor?
1. Preventive motor maintenance. The objective of this kind of maintenance is to prevent operating problems and make sure that the motor continuously provides a reliable operation Usually, preventive maintenance is a scheduled part of maintaining a whole system.
Which type of rotor is used for single phase induction motor?
squirrel cage rotor type
How do you protect a motor?
Overload protection is an essential feature of any controller that is designed to properly protect a motor and still obtain its maximum available power under a range of overload and temperature conditions.
What is motor current signature analysis?
Motor Current Signature Analysis (MCSA) is a condition monitoring technique used to diagnose problems in induction motors, [3-12]. Concept originates from early 1970s and was first proposed for use in nuclear power plants for inaccessible motors and motors placed in hazardous areas, .
What is electrical signature analysis?
Electrical Signature Analysis (ESA) is the general term for a set of electrical machine condition monitoring techniques through the analysis of electrical signals such as current and voltage. … Variations in the voltage and current signals are analyzed in relation to some failure patterns.
What is motor circuit analysis?
Motor Circuit Analysis (MCA™) is a deenergized test method to assess the health of the motor. … The advantage to testing from the MCC is that the entire electrical portion of the motor system, including the connections and cables between the test point and the motor, will be evaluated.