Vanguard Instruments Company WRM-10 User Manual Download Page 1

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WRM-10

TRANSFORMER WINDING RESISTANCE METER

USER’S MANUAL

Vanguard Instruments Company, Inc.

1520 S. Hellman Ave.
Ontario, California 91761, USA

TEL: (909) 923-9390
FAX: (909) 923-9391

June 2009

Revision 2

Advanced Test Equipment Rentals

www.atecorp.com 800-404-ATEC (2832)

Established 1981

Summary of Contents for WRM-10

Page 1: ...METER USER S MANUAL Vanguard Instruments Company Inc 1520 S Hellman Ave Ontario California 91761 USA TEL 909 923 9390 FAX 909 923 9391 June 2009 Revision 2 Advanced Test Equipment Rentals www atecorp...

Page 2: ...TIONS The WRM 10 shall be used only by trained operators All transformers under test shall be off line and fully isolated DO NOT MODIFY TEST EQUIPMENT To avoid the risk of introducing additional or un...

Page 3: ...rming a Single Resistance Test 12 3 3 2 Performing a Voltage Regulator Test 14 3 4 User Diagnostic Mode 16 LIST OF FIGURES Figure 1 WRM 10 Controls and Indicators 4 Figure 2 100 120 Vac Jumper Setting...

Page 4: ...e following conventions The WRM 10 s control knob is referenced as CONTROL KNOB Menu names are referenced as MENU NAME WRM 10 LCD screen output is shown as Warning messages are indicated as WARNING Wa...

Page 5: ...In addition to measuring the resistance value the WRM 10 also checks the make before break tap switching sequences of voltage regulators and load tap changers The WRM 10 is furnished with three 50 foo...

Page 6: ...CURRENT RANGE Auto range 10 Amperes max DISPLAY Back lit LCD Screen 16 characters by 2 lines viewable in bright sunlight and low light levels CONTROL Single turn and push knob COMPUTER INTERFACE RS 2...

Page 7: ...nctional description in Table 2 The table describes the function of each item on the control panel The purpose of the controls and indicators may seem obvious but users should become familiar with the...

Page 8: ...e port female DB type Data rate is set to 19 200 baud 1 start bit 2 stop bits 8 data bits and no parity bit Pin Signal 2 RX 3 TX 5 Signal Ground 7 DISCHARGE Red LED indicator light This warning indica...

Page 9: ...ock as listed in Table 3 and illustrated in Figure 2 and Figure 3 The relay must also be changed if the voltage settings are changed Please see Figure 4 for the location of the relay Table 3 Voltage S...

Page 10: ...WRM 10 USER S MANUAL REV 2 7 Figure 4 Relay Location...

Page 11: ...the CONTROL KNOB b The following screen will be displayed Turn the CONTROL KNOB clockwise to increase the contrast darken the screen Turn the CONTROL KNOB counter clockwise to decrease the contrast l...

Page 12: ...connected to a transformer terminal while high current is being conducted during a test Failure to heed this warning can result in lethal electric shock to personnel and or damage to the equipment Fig...

Page 13: ...The above figure illustrates the simultaneous testing of both the high and low windings on a single phase transformer When measuring two channels the above cable connection is recommended since it wil...

Page 14: ...e to follow this procedure may damage the WRM 10 b Plug the WRM 10 power cable into a power outlet c Insert current cable plugs and voltage sensing cable plugs into the corresponding control panel jac...

Page 15: ...he following screen will be displayed Press the CONTROL KNOB to start the test You can abort the test by turning the CONTROL KNOB e The following screen will be displayed The above screen will continu...

Page 16: ...ress the CONTROL KNOB to stop the test f The WRM 10 will automatically discharge the transformer and display the following screen during the discharging process After the transformer is discharged the...

Page 17: ...connecting the WRM 10 s continuity test input across the switching input and running the regulator switch through all the contacts in its range any break in continuity caused by faulty tap switching c...

Page 18: ...egulator tap switch f If no transient is detected as the taps are switching 1 The screen display will not change 2 Turn or press the CONTROL KNOB to end the test The following screen will be displayed...

Page 19: ...ollowing screen will be displayed Turn the CONTROL KNOB till the following screen is displayed Press the CONTROL KNOB c The following screen will be displayed Press the CONTROL KNOB to start the test...

Page 20: ...20 S Hellman Ave Ontario CA 91761 USA Phone 909 923 9390 Fax 909 923 9391 www vanguard instruments com Copyright 2009 by Vanguard Instruments Company Inc WRM 10 User s Manual Revision 2 0 June 5 2009...