Megger BN-19000 User Manual Download | Manualshive

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WWW

.MEGGER.COM

User’s Manual

Art No.

ZP-BN01E

Doc.

BN034794AE V01a 2018

MTO106

Transformer ohmmeter

www.calcert.com

[email protected]

1.888.610.7664

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Summary of Contents for BN-19000

Page 1: ...WWW MEGGER COM User s Manual Art No ZP BN01E Doc BN034794AE V01a 2018 MTO106 Transformer ohmmeter www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Page 2: ...of Megger Sweden AB Any attached hardware schematics and technical descriptions or software listings that disclose source code are for informational purposes only Reproduction in whole or in part to create working hardware or software for other than Megger Sweden AB products is strictly prohibited except as permitted by written license agreement with Megger Sweden AB TRADEMARK NOTICES Megger and P...

Page 3: ... and Accessories 10 3 1 Panel 10 3 2 The display 11 3 3 Accessories 11 Included 11 Optional 11 4 Setup and operation 12 4 1 Preparations 12 4 2 Testing Single and Dual windings 12 4 3 Testing Delta winding resistance 13 5 Application examples 14 5 1 Testing transformers with tap changers 14 5 2 Temperature correction 14 5 3 Manual demagnetization of a transformer 15 6 Troubleshooting and Calibrati...

Page 4: ...ence of defects in transformers such as increased contact resistance in terminal connections and tap changers The instrument can also be used for general resistance measurements of for instance control wiring voltage regulators motors generators and all types of connections 1 2 Winding resistance testing Transformer winding resistances are measured in the field in order to check for abnormalities ...

Page 5: ...specifically limited to replacing or repairing at our option defective equipment This warranty does not include batteries lamps or other expendable items where the original manufacturer s warranty shall apply We make no other warranty The warranty is void in the event of negligence abuse failure to follow recommended operating procedures or failure by the customer to perform specific maintenance a...

Page 6: ...ety ground in any manner The equipment must be connected to a grounded mains outlet 3 Ground lead The first connection made and last removed is the connection of instrument Protective conductor terminal to station ground using the separate ground lead Make sure ground lead is checked for continuity and securely fastened 4 Use an easily accessible power outlet This will ensure that you can disconne...

Page 7: ...gether with the instrument Maintenance 1 DISCONNECT the MAINS plug before any cleaning or maintenance 2 Refer all servicing to Megger authorized personnel Do not attempt to service the instrument yourself If you attempt to service the instrument the warranty is no longer valid 3 Read and understand Safety in the User Manual before performing any service 4 Routine maintenance is all that is require...

Page 8: ...harge circuit safely discharges the test object when test is completed LED and audio sig nal indicate the charging status 6 100 240V 5A 50 60Hz Mains input and fuse box Always use the power cord supplied with the unit The unit is powered when the switch for power input is in the on position 7 RANGE Selector for test currents 8 ON OFF Toggle switch ON OFF for generation of test cur rents Red Indica...

Page 9: ...If dual channel measurement is selected the above values are duplicated 3 3 Accessories Included Test lead black with banana connector and Kelvin clamp 10m 33ft 1 GC 32310 Test lead red with banana connector and Kelvin clamp 10m 33ft 1 GC 32312 Ground lead 5m 16ft 2 5 mm 1 GA 00200 Mains cable 1 AA 00010 User s manual 1 ZP BN01E MTO106 Report pad 1 XP BN01E MTO106 Reporting template file 1 SB 0022...

Page 10: ...nnect the Kelvin type test leads to the MTO106 see figures below The leads marked Generator to the CUR RENT OUTPUT terminals of corresponding colour and the leads marked P Meas to R1SENSE terminals of corresponding colour If using separate voltage sense and current leads connect them to the corresponding CURRENT OUTPUT and R1 SENSE termi nals For Dual windings Connect the second channel sense lead...

Page 11: ...esting Delta winding resistance Testing Delta winding resistance may be a very time consuming procedure in particular LV winding deltas The correct balance time can take up to 30 60 minutes for a large transformer which far exceeds the time restriction of many tests The method for quickly testing delta configurations requires that both the high side and low side be connected in series with the Tra...

Page 12: ...n different tap position changes Fig 1 shows a typical behavior for a transformer tap changer in as new condition Fig 5 1 Winding resistance vs tap position for a new trans former Measuring the winding resistance for each individual tap is quite straightforward The most common issue is probably that the tester has not waited for a sufficient time for taking measurements after a tap change Monitor ...

Page 13: ... a normal winding resistance test accord ing to the instructions in section 4 2 Testing Single and Dual windings on page 12 2 Swap the terminals preferably by swapping the Kelvin clamps select the next lower test current and inject current until the current reading has reached at least 50 of the set value 3 Repeat step 2 for each test current range down to the lowest selectable test current value ...

Page 14: ...nected 4 Current leads shorted 1 Increase test current 2 Check sense leads 3 Check sense leads 4 Check current leads U 0 06 mV 0 0 A No current loop current leads not properly connected Check current leads U 20 V Typical less than 50 of set current value Too high test current Lower test current 0 010 mΩ is displayed Resistance below measurement range 0 10 mΩ 1 0 mΩ 0 010 Ω or 0 10 Ω Too low test c...

Page 15: ...2 x12 x 7 6 Weight 7 3 kg 16 lbs excl cables Display 4 inch backlit monochrome alphanumerical display Test leads 2 x 10 m 33 ft with banana connectors and Kelvin clamps Ground lead 1 x 5 m 16 ft 2 5 mm Measurement section Measurment range 10 µOhm to 30 kOhm Resolution Up to 4 digits Open circuit test voltage up to 48 V DC Measurement voltage up to 20 V DC Current range Resistance range Inaccuracy ...

Page 16: ... Insulation Resistance Test Equipment Line Testing Equipment Low Resistance Ohmmeters Motor Phase Rotation Test Equipment Multimeters Oil Test Equipment Portable Appliance Tool Testers Power Quality Instruments Recloser Test Equipment Relay Test Equipment T1 Network Test Equipment Tachometers Speed Measuring Instruments TDR Test Equipment Transformer Test Equipment Transmission Impairment Test Equ...

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