Quality Assurance Procedure
Stage of Testing | Electrical Routine Test | Medium Voltage and High Voltage Motors and Generators | High voltage Hydro generators and Turbo generators | |||||
---|---|---|---|---|---|---|---|---|
Coils Rated Line Voltage in kV | Bars Rated Line Voltage in kV | |||||||
3.3 | 6.6 | 11 | 13.8 | 11 | 13.8 | 15.75 | ||
1. Test on Individual coils (New coils and Bars) | Tapping test | No debonding on the slot portion | ||||||
Surge test at (1.7 * Un) KV | 5.6 | 11.2 | 18.7 | 23.46 | Conductors interlamination test at 110 V AC | |||
AC HV Test at 1.3 * (2Un+1) KV | 10 | 19 | 30 | 37.8 | 30 | 37.8 | 42.25 | |
Tan delta test | The tan delta measurement carried out from 0.2* Un to 1.2* Un insteps of 0.2* Un | |||||||
2. Test after Coils Insertion in wound Stator – Before connection | ||||||||
2. Test after Coils Insertion in wound Stator – Before connection | IR & PI | 1 KV | 2.5KV | 5KV | 5KV | 5KV | 5KV | 5KV |
Surge test at (1.6 * Un) KV | 5.28 | 10.56 | 17.6 | 22 | NA | |||
AC HV test at 1.2* (2Un+1) KV | 9.12 | 17.04 | 27.6 | 34.32 | 27.6 | 34.32 | 39 | |
RTD’s HV test | AC HV test at 1.5 KV for 5 seconds, Should not failure | |||||||
RTD’s Resistance | Measure the Resistance Value of all individual RTD’s and Variation should be within +/-15% | |||||||
3. Test after Complete stator winding connection | Winding resistance | Measure the Winding Resistance Per Phases | ||||||
IR & PI | 1 KV | 2.5KV | 5KV | 5KV | 5KV | 5KV | 5KV | |
AC HV test at 1.1*(2Un+1) KV | 8.36 | 15.62 | 25.3 | 31.46 | 25.3 | 31.46 | 35.75 | |
Surge test in KV | 2KV | 2KV | 2KV | 2KV | 5KV | 5KV | 5KV | |
Tan delta test | The tan delta measurement carried out from 0.2* Un to 1.2* Un insteps of 0.2* Un | |||||||
RTD’s Resistance | Measure the Resistance Value of all individual RTD’s and Variation should be within +/-15% | |||||||
4.Test After Assembly of rotors Test After Assembly of rotors and Stators | Winding resistance | Measure the Winding Resistance Per Phases | ||||||
IR & PI | 1 KV | 2.5KV | 5KV | 5KV | 5KV | 5KV | 5KV | |
AC HV test at (2Un+1) KV | 7.6 | 14.2 | 23 | 28.6 | 23 | 28.6 | 32.5 | |
Tan delta test | The tan delta measurement carried out from 0.2* Un to 1.2* Un insteps of 0.2* Un | |||||||
RTD’s Resistance | Measure the Resistance Value of all individual RTD’s and Variation should be within +/-15% |