| |
| All Motors are tested in accordance with IS 12615. |
| |
| Type Tests |
| |
| The following tests are carried out on one Motor in a batch production or on Motors specially required to be type tested as per customer’s requirement. All tests included in routine tests and following additional tests are carried on the Motor. |
| |
|
| a. |
Measurement of Stator Resistance. |
| b. |
No Load Test. |
| c. |
Locked Rotor test at reduced voltage and Measurement of Current, Power input and torque of Motors. |
| d. |
Full Load reading of Voltage, Current, Power input and slip. |
| e. |
Temperature rise test – The Temperature rise of the motor after being run on full Load till steady state is reached is determined by 1.Thermometer method 2. By Resistance method. |
| f. |
Momentary Overload test. |
| g. |
Insulation Resistance test. |
| h. |
High Voltage test. |
| |
| Routine Test |
| |
| The following are the routine tests carried out on each and every Motor. |
| |
| a. |
Measurement of Resistance. |
| b. |
Insulation Resistance test. |
| c. |
Motors are tested at 1/
√3
times the rated Voltage for checking the ability of the motor to run up to the full speed, when switched in either direction. |
| d. |
No load test. This test is carried out at rated voltage and the readings for current, RPM & Power input are noted. |
| e. |
Locked Rotor Test – This test is carried at a reduced voltage by passing the full load current and the readings for current and power input are noted. |
| f. |
High Voltage test. |
| |
| Note : The meters used for noting the above readings have class 0.5% accuracy. |
| |
| Other Tests |
| |
| Apart from the above tests mentioned in the Indian Standards, following additional tests can be offered. |
| a. |
Over speed test – Running of Motor at 1:2 times the maximum rated speed for 2minutes at no load. |
| b. |
Vibration test carried out as per IS : 12075 |
| |
|
