ALL-TEST PRO AT31 User Manual Download Page 18 | Manualshive

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ALL-TEST PRO AT31 User Manual Download Page 18

ALL-TEST

PRO

®

31 User Manual

©2011, ALL-TEST

Pro,

LLC

www.alltestpro.com

rev 2011-11F

18

3.

Turn the motor shaft until the highest impedance value is obtained.

4.

Press the ZERO key again.

This sets the reference phase (T1-T3) to “0”. Enter 0 on the Motor

Test Form

5.

Move the Test leads to T2 & T3.

This determines the Impedance Phase Balance or Unbalance

Referenced to (T1-T3).

6.

Turn the shaft slowly until the lowest percentage value is obtained.

(The percentage should be

less than 3% of phase unbalance. A percentage > 5% indicates a fault in the winding and
should be investigated further).

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Summary of Contents for AT31

Page 1: ...2011 ALL TEST Pro LLC rev 2011 11F ALL TEST Pro LLC ALL TEST PRO 31...

Page 2: ...2011 ALL TEST Pro LLC rev 2011 11F...

Page 3: ...ROR CODES 13 Continue with Other Phases 14 Continue with Last Phase 15 Phase Balance Test 17 Insulation Resistance Testing 20 Rotor Test 22 Bar Test 22 Wave Form Test 23 Changing the Motor Test Freque...

Page 4: ...Field 33 Armature Testing 33 DC Motor Analysis 34 IX Additional Test Methods 35 Wound Rotor Motors 35 Wye Delta Motors 35 Capacitor Testing 36 X Tech Support and Information 37 XI Available Accessorie...

Page 5: ...in electric motors and other wound equipment The patented tests performed for early winding fault detection winding impedance test phase angle I F current frequency response tests EMI Electro Magneti...

Page 6: ...rument Electrostatic charges may damage surface mount electronics Please contact your vendor or ALL TEST Pro authorized repair center Use only the supplied charger for charging the instrument It is an...

Page 7: ...leads and clips D Charger 115 or 230 Volt E Manual on CD Rom F Carrying Pouch G Reset Key Only sent with units before Serial number 2029 Instrument Operation The instrument is divided up into three w...

Page 8: ...tests to be performed by the AT31 Indicator Light Section 1 Charging light Indicates that the unit is charging light is illuminated red while charging light is green when fully charged 2 Test indicat...

Page 9: ...test used to verify that the insulation to ground resistance is sufficient to prevent electrical shock 4 Battery charge level indicator A fully charged battery will have 7 bars it is recommended to ke...

Page 10: ...selection to calculate difference of the measured impedance value 4 Down direction and TEST key toggles between display screens and performs selected tests 5 Right direction and F2 Hz key allows the o...

Page 11: ...PRO 31Figure 2 Equipment and Materials To perform a motor test with the ALL TEST PRO 31 requires ALL TEST PRO 31 Test leads and lead clips A pen and paper or a copy of the Motor Test Form on page 38...

Page 12: ...OK Key to select the Winding Test icon Z from the main menu Observe Record the Test Data 1 The default value is 200 Hz as displayed in the bottom right corner of the display screen a The value of the...

Page 13: ...he upper left hand corner Note The 16 shown in upper right corner is the change in phase angle when the test frequency is doubled Not used for analysis purposes 1 To return to the Display Screen 1 Pre...

Page 14: ...test leads to T1 T3 to make the measurements on the next phase 2 Read the Impedance Z and Phase Angle values from display screen 1 for winding Do not fill in the phase balance until all three phases h...

Page 15: ...e 1 Move the Test Leads to T2 T3 ALL TEST Pro 31 Motor Test Form Motor ID Location Test Date Test Frequency Phase 1 2 Phase 1 3 Phase 2 3 Impedance Z 107 107 Phase Angle 66 66 Z Test or I F 45 45 Phas...

Page 16: ...rrent Frequency Response I F 4 Record these test results on the Motor Test Form ALL TEST Pro 31 Motor Test Form Motor ID Test Motor Location Warehouse Test Date 8 8 06 Test Frequency 200 Hz Phase 1 2...

Page 17: ...stem An Industrial Electrical Distribution Maintenance Guidebook published by the US Department of Energy Bonneville Power Administration Pacific Gas Electric PacifiCorp and Tacoma Public Utilities As...

Page 18: ...sets the reference phase T1 T3 to 0 Enter 0 on the Motor Test Form 5 Move the Test leads to T2 T3 This determines the Impedance Phase Balance or Unbalance Referenced to T1 T3 6 Turn the shaft slowly...

Page 19: ...the test leads to T1 T2 this checks the Impedance Balance Unbalance of Phase of the final phase winding T1 T2 to T1 T3 9 Turn the shaft slowly until the lowest percentage value is obtained 10 Record...

Page 20: ...e display screen This is the main menu 2 Use the to highlight the INS icon from the display screen This sets the ALL TEST PRO 31 up to measure insulation resistance to ground 3 Connect both the Red le...

Page 21: ...made on all three phases 9 Depress the TEST key and hold until 500 M is displayed If the ALL TEST PRO 31 does not display 500 M after one minute of testing stop and record the value and test voltage o...

Page 22: ...ly machined rotors and high resistance connections are some of the rotor issues easily recognized by the ALL TEST PRO 31 Bar Test Provides a visual real time indication of the response of the rotor to...

Page 23: ...bar does not cross zero repeat steps 6 and 7 at a slower rate until it does cross zero ii Turn the shaft until the bar moves to the extreme left side of the screen note the displayed value ex 4 5 iii...

Page 24: ...to select PWR OFF icon 8 Press the OK key to turn the ALL TEST PRO 31 off Changing the Motor Test Frequency The default testing frequency for the ALL TEST PRO 31 is set at 200 Hz This test frequency...

Page 25: ...s the F2 key The ALL TEST PRO 31 will emit an audible beep and the 1 displayed in the upper left corner of the display screen will change to Also the value of the frequency in the lower right hand par...

Page 26: ...s if there is any EMI present in the motor system which may cause errors in ALL TEST PRO 31 or ALL TEST IV PRO readings Facts about EMI EMI may cause non repeatable or unsteady test results A constant...

Page 27: ...or machine that is being tested If any EMI is present the values that are displayed are the low and high values of the EMI peak valleys being detected 6 Press F2 Hz key to toggle between the low high...

Page 28: ...tive contact ALL TEST Pro sales support for a replacement The installed batteries are not subject to retained memory and to insure the ALL TEST PRO 31 is fully charged leave it plugged into the chargi...

Page 29: ...ch as Is the motor in a critical application what are the operating conditions environment etc Table 1 Three Phase Motor Test Results Test Limits Description Impedance Special This result can be used...

Page 30: ...h the motor and cable If the reading shows similar results at the motor then the fault exists in the motor Rotor Windings In the case of synchronous motors or generators that have windings in the roto...

Page 31: ...g voids rotor eccentricity etc To separate a rotor fault from a winding fault it is necessary to perform a rotor compensation Use the procedure listed below to perform the rotor compensation test 1 Wi...

Page 32: ...unbalances of Fi and or I F at the other test frequency increase then the winding is most likely in poor condition In table 4 the spread of Fi is 3 units 66 to 69 after changing At the test frequency...

Page 33: ...4 Record the test frequency impedance and phase angle readings 5 Compare these results to series field readings from a similar motor or to a baseline reading on the same motor and note any changes Te...

Page 34: ...he instrument ATF 1100 Armature Test Forks 2 Select the Motor Test from the main menu see Winding Test section 3 Separate the Armature Test Forks to approximately 90 degree span of the commutator Lock...

Page 35: ...t be reliable When testing the stator coils the three phases of rotor coils must be shorted together and connected to an earth ground to bleed off circulating currents induced by the stator Data inter...

Page 36: ...e capacitor lead from the circuit 2 Short the capacitor terminals to remove any remaining charge 3 Put the ALL TEST PRO 31 in winding test mode by selecting the Motor icon from the mode screen 4 Conne...

Page 37: ...ories for the ALL TEST PRO 31 ATF1100 DC Armature Test Fixture AT3402 4 Condition Calculator 4 0 Software ATM2000 Motor Fault Training Motor XII Training Class AT MCCLASS Motor Diagnostics Workshop Fo...

Page 38: ...opt Ins Resistance Test Voltage Was rotor set to lowest value during phase balance test Y__ N__ Rotor test performed Y___ N___ Comments ALL TEST PRO ALL TEST Pro 31 Motor Test Form Motor ID Location T...

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