background image

8

MTO106

ZP-BN01E

BN034794AE 

2 SAFETy 

S

afety 

2.1 General

For your own safety and to get the maximum benefit 
from your instrument, please ensure that you read 
and understand the following safety instructions and 
warnings before using the instruments. 
Read and comply with the following instructions. 
Always comply with local safety regulations.

Symbols on the instrument

caution, refer to accompanying 
documents.

Protective conductor terminal.

WEEE, Waste Electrical and Electronic 
Equipment. Please utilize your 
local WEEE collection facilities in 
the disposition of this product and 
otherwise observe all applicable 
requirements. 
The unit can also be returned to 
Megger at any time at no charge for 
the disposal.

2.2 Safety instructions

1.   

Single ground system

 - This equipment can 

be used only in electrical systems with single 
ground. Before connecting this unit to power 
you must verify that High Voltage Ground 
and Low Voltage Protective Ground create a 
single protective ground with no measurable 
voltage potential existing between these ground 
systems. If a voltage potential is found between 
the ground systems please consult local safety 
regulations. 

2.   

Mains cord protective conductor

 - The 

instrument is equipped with a power cord with 
integral safety ground pin. Do not defeat the 
safety 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 disconnect the power 
quickly in case of a problem. The instrument 
should be operated only from the type of power 
source indicated on its nameplate. 

5.   

Connecting

 - It is very important not to 

connect any leads on top of or too close to 
one another. Take the necessary precautions 
to as-sure one lead falling off will not take a 
second lead with it. Never connect the test 
equipment to energized equipment. Never make 
any connection or disconnections while the test 
equipment is generating or discharging. 

6.   

Testing

 - When applying current to a 

transformer with very high inductance, 
additional care should be taken not to remove 
current leads while current is still flowing. 
Removal of terminals while current flowing 
may generate an arc that may result in lethal 
injury: electrical, thermal or by fall. Ensure that 
the transformer to be tested is completely de-
energized. check every winding. Ensure that all 
terminals of the transformer are disconnected 
from line or load at the transformer. 
connections to ground may be left in place. 

Summary of Contents for MTO106

Page 1: ...WWW MEGGER COM User s Manual Art No ZP BN01E Doc BN034794AE V01a 2018 MTO106 Transformer ohmmeter...

Page 2: ......

Page 3: ...iptions 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 produ...

Page 4: ...enance 9 3 Instrument description 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...

Page 5: ...BN034794AE ZP BN01E MTO106 5...

Page 6: ...program To help locate the presence of defects in transformers such as increased contact resistance in terminal connections and tap changers The instrument can also be used for general resistance mea...

Page 7: ...lowing shipment Our liability is specifically limited to replacing or repairing at our option defective equipment This warranty does not include batteries lamps or other expendable items where the ori...

Page 8: ...ground pin Do not defeat the safety 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 instr...

Page 9: ...that are not intended for use together with the instrument Maintenance 1 DISCONNECT the MAINS plug before any cleaning or maintenance 2 Refer all servicing to Megger authorized personnel Do not attem...

Page 10: ...display 5 DISCHARGE Built in discharge 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 bo...

Page 11: ...proach 100 only very slowly Note 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 3...

Page 12: ...current switch is set to OFF 2 Connect 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 mark...

Page 13: ...e indication of discharging 4 3 Testing Delta winding resistance Testing Delta winding resistance may be a very time consuming procedure in particular LV winding deltas The correct balance time can ta...

Page 14: ...with only small deviations between 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...

Page 15: ...cording to the method below 1 Run 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...

Page 16: ...leads switched 3 Sense leads not connected 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 n...

Page 17: ...BN034794AE ZP BN01E MTO106 17 7 Specifications...

Page 18: ...mensions W x D x H 360 x 304 x 194 mm 14 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 Kelv...

Page 19: ......

Page 20: ...Equipment Fiber Optic Test Equipment Ground Resistance Test Equipment Insulation Power Factor C DF Test Equipment Insulation Resistance Test Equipment Line Testing Equipment Low Resistance Ohmmeters...

Reviews: