Megger NIM 1000, User Manual

Page 1: ...1 NIM 1000 Net Impedance Meter USER GUIDE Issue 04 06 2016 EN Article number 82941 ...

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Page 3: ...ad Kent CT17 9EN T 44 1304 502100 F 44 1304 207342 E uksales megger com Dr Herbert Iann Str 6 D 96148 Baunach T 49 9544 68 0 F 49 9544 22 73 E team dach megger com Hagenuk KMT Kabelmesstechnik GmbH Megger USA Röderaue 41 D 01471 Radeburg Dresden T 49 35208 84 0 F 49 35208 84 249 E team dach megger com Valley Forge Corporate Centre 2621 Van Buren Avenue Norristown PA 19403 USA T 1 610 676 8500 F 1 ...

Page 4: ...r are hereby limited to a period of 12 months from the date of delivery Each component supplied by Megger within the context of warranty will also be covered by this warranty for the remaining period of time but for 90 days at least Each measure to remedy a claim under warranty shall exclusively be carried out by Megger or an authorized service station This warranty does not apply to any fault or ...

Page 5: ...em Settings 18 4 2 Performing Measurements 19 4 2 1 Network Impedance Measurement 20 4 2 1 1 Prepare Measurement 20 4 2 1 2 Performing the Measurement 22 4 2 1 3 Analysing Measurement Results 23 4 2 2 Measuring in Fault Mode 25 4 2 2 1 Preparing Measurement 25 4 2 2 2 Performing the Measurement 26 4 2 2 3 Identifying and Locating Faults 27 4 3 Exporting the Measured Data 28 5 Maintenance and care ...

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Page 7: ...urement results useless It is important to observe the general electrical regulations of the country in which the device will be installed and operated as well as the current national accident prevention regulations and internal company directives work operating and safety regulations Use genuine accessories to ensure system safety and reliable operation The use of other parts is not permitted and...

Page 8: ...g the measuring systems sufficiently The operation of Megger products in direct contact with water aggressive substances and inflammatory gases and vapours is prohibited The NIM 1000 is built to be robust and can withstand the stresses it can expect to be subjected to in demanding everyday use Nevertheless it is a precision measuring device which needs to be treated with the appropriate care This ...

Page 9: ... can be used to trigger a load dependent fault which can then be located either with the help of a simultaneously connected measuring device or by means of multiple measurements at various connection points The device is linked to the low voltage grid to be tested by means of the available connection cables four conductor measurement with Kelvin clips and also receives its supply voltage over thes...

Page 10: ...on lead brown 90009320 2 Connection lead black 90009321 2 Connection lead grey 90009322 2 Connection lead blue 90009323 1 NIM 1000 A socket adapter 128311627 1 USB flash drive 890020928 10 Spare fuses T 25A H 440V 6 3 mm x 32 mm 90004745 1 Manual 82941 Check the contents of the package for completeness and visible damage right after receipt In the case of visible damage the device must under no ci...

Page 11: ...C 61557 3 Up to 3 1 mΩ see also Annex 1 Measuring range 10 mΩ 5 Ω 230 V 400 V 10 mΩ 2 5 Ω 115 V See also Annex 2 Resolution 1 mΩ Measurement category 300V CAT IV or 600V CAT IV when using the PKC 1 high performance connection clamps Safety functions Temperature monitoring Display Transflective sunlight readable 5 7 colour display with a resolution of 640 x 480 pixels Memory At least 1000 records o...

Page 12: ...l Description 12 2 3 Connections Controls and Display The NIM 1000 has the following connection display and control elements Element Description Display Rotary encoder USB port Connection cables Trigger output ...

Page 13: ...t WARNING Connection sequence When connecting the device the two blue connection cables should be connected to the neutral conductor of the low voltage cable first Not until after that can the live phase conductors be connected The conductors are disconnected in reverse order first disconnect the phase conductors then the neutral conductor The following figure shows the simplified connection diagr...

Page 14: ...arried out on phases which are live with a suitable input voltage Accordingly phases which have not been connected will not be taken into account in multiple conductor mode So for special applications or for time saving reasons the conductor combinations to be measured can be purposefully limited in the multiple conductor mode by using a specific connection configuration The following table shows ...

Page 15: ...t or the export of measurement data The plug is designed as a Schuko plug CEE 7 4 but it can also be connected to sockets of different designs without problem using the appropriate accessories The connection between the NIM 1000 and the adapter should be established as follows with the help of the blue and the brown connection cables Connection to mains socket ...

Page 16: ...ialogue window can be shut by a quick push of the rotary encoder following which the three phase voltages are measured audible phase relay switching After switching on the following information on the current status of the system is shown on the left side of the display Power on System status Set measuring current Network voltage and frequency currently measured Selected measuring mode number of m...

Page 17: ...ont Navigation within the menus is effected almost entirely from the circular selection menu Operating the system with the rotary encoder is as follows Select the menu item Increase or decrease the value of a variable parameter Select an option from a selection list Call up the selected menu item Confirm the setting or the selection made Each menu with the exception of the main menu has a menu ite...

Page 18: ... be adjusted by turning the rotary encoder Pressing causes the mark to move the next segment Once the input has been concluded the changes can either be accepted with OK or rejected by selecting Cancel When this function is used a search in respect of firmware and language files is conducted in the directory nig updates on the inserted USB flash drive The files found are then listed and using the ...

Page 19: ...e diagram whereby the relevant changes can be easily identified Further sub division into single and multiple conductor mode gives the following operating modes Menu item Description Network impedance measurement on one conductor The impedance is only measured on the phase which is connected via the brown connection cables L1 This time saving single conductor mode is particularly suitable if the r...

Page 20: ... values are to be defined one after another The options for setting the interval depend on the previously set total measurement time The number of measurements can also be defined as an alternative to measurement duration see below The respective last adopted setting applies Number of measurements 1 255 The set number of measurements is carried out in quick succession and while constantly switchin...

Page 21: ...ticipated voltage dip in calculated Call up the menu item and select the option VDIP Then enter the load of the appliance The aim is to calculate the maximum load which can be connected to the measurement point without any voltage dip defined by existing guidelines being exceeded This function can also be used to calculate the maximum feed in load e g of a PV installation Accordingly in this case ...

Page 22: ...ning measuring process as standard Using the menu item during and after the measurement the diagram types may be switched between as follows R X Impedance resistance and reactance Z Phi Impedance amount and phase shift angle U I Current and voltage curve of the period in which the measurement took place The measurement will end automatically as soon as the preset number of measurements or the pres...

Page 23: ...ing more than one conductor the following selection menu must be called up via the menu item The conductor combination to be displayed is selected by turning the rotary encoder By changing the selection the corresponding curves and measured values are displayed In addition to the typical measured values see previous page the results of a load calculation see page 20 which may have been carried out...

Page 24: ...the type of network and earthing conditions these values do not necessarily match those of the neutral conductor For instance in the case of a three phase measurement on IT networks the three phase short circuit current and the three phase short circuit power are also measured However no impedance values incl graphs will be shown for the non existent PEN conductor Impedance of the PEN conductor Th...

Page 25: ... type of application should be selected In the case of intermittent faults in particular it is recommended that you carry out a fault location at the same time as the fault trips For this purpose a suitable reflectometer must be connected to the same low voltage cable and hooked up to the NIM 1000 via the trigger output The triggering of the reflectometer takes place at the time of each respective...

Page 26: ...an be switched between as follows Z I Impedance absolute and measuring current maximum U I Current and voltage curve of the period in which the measurement was carried out for all measurements up until this point Measuring ends automatically as soon as the 8 measurements have been carried out on all involved phases The measurement can be manually deactivated at any time via the menu item Starting ...

Page 27: ...n principle As soon as a fault has been tripped in the course of the measurements this is marked by diverging envelope curves This is very easy to see in the current curve in the example depicted below While in the case of the inconspicuous measurement the envelope curve broken black line is identical for all curves in the case of the faulty phase two different envelope curves are clearly recognis...

Page 28: ...ry of the NIM 1000 Measurement data records already contained in the memory will not be overwritten in this process and thanks to the non volatile memory the data will be maintained permanently too As soon as at least one data measurement record is stored in the memory an export of data can be initiated using the menu item in the main menu Here all data measurement records stored in the memory are...

Page 29: ...laims The connections and connection leads of the system must be regularly tested to ensure that they are free of defects and intact in accordance with the applicable national and company specific arrangements If the device is not used for a lengthy period it should be stored in a dust free and dry environment Do not clean the display with aggressive products such as solvents or spirits Instead us...

Page 30: ... range 600 A Measuring range 200 A Measuring range 1000 A Measuring range 800 A Measuring range 600 A Measuring range 300 A Measuring range 200 A Operating uncertainty in Z in mΩ Z in mΩ Z in mΩ Operating uncertainty in Operating uncertainty in U 115 V U 230 V U 400 V ...

Page 31: ...mΩ 5 1 mΩ 300 A for 10 mΩ Z 45 mΩ 200 A for 45 mΩ Z 150 mΩ 100 A for 200 mΩ Z 300 mΩ 80 A for 275 mΩ Z 500 mΩ 10 1 mΩ 200 A for 20 mΩ Z 45 mΩ 100 A for 80 mΩ Z 200 mΩ 80 A for 180 mΩ Z 275 mΩ 400 V 3 1 mΩ 600 A for Z 10 mΩ 500 A for Z 25 mΩ 400 A for Z 70 mΩ 300 A for Z 190 mΩ 200 A for Z 400 mΩ 100 A for Z 600 mΩ 5 1 mΩ 500 A for 10 mΩ Z 25 mΩ 400 A for 10 mΩ Z 70 mΩ 300 A for 90 mΩ Z 190 mΩ 200 ...

Page 32: ... Z 300 mΩ 100 A Z 1100 mΩ 80 A Z 2500 mΩ 230 V 600 A Z 40 mΩ 500 A Z 150 mΩ 400 A Z 300 mΩ 300 A Z 500 mΩ 200 A Z 1000 mΩ 100 A Z 2500 mΩ 80 A Z 5000 mΩ 400 V 1000 A Z 60 mΩ 900 A Z 120 mΩ 800 A Z 200 mΩ 700 A Z 300 mΩ 600 A Z 430 mΩ 500 A Z 620 mΩ 400 A Z 900 mΩ 300 A Z 1400 mΩ 200 A Z 2300 mΩ 80 A 100 A Z 5000 mΩ ...

Page 33: ...to simbolo indica che il prodotto non deve essere smaltito come un normale rifiuto domestico In quanto prodotto B2B può anche non essere smaltito in centri di smaltimento cittadino Se si desidera smaltire il prodotto consegnarlo a un organismo specializzato in smaltimento di apparecchiature elettriche vecchie Šī zīme norāda ka iztrādājumu uz kura tā atrodas nedrīkst izmest kopā ar parastiem mājsai...