Gx Series TABLE OF CONTENTS PRECAUTIONS AND SAFETY MEASURES ............... 3 1.1. Preliminary instructions ..................... 3 1.2. During use ......................... 4 1.3. After use ..........................4 1.4. Definition of measurement (overvoltage) category ............4 GENERAL DESCRIPTION ................... 5 ...
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Gx Series 6.5. SEQ: Phase sequence and phase concordance test ............66 6.5.1. Anomalous situations ......................69 6.6. LEAKAGE: Leakage current measurement ..............70 6.7. EARTH: Measurement of earth resistance ..............72 6.7.1. 3-wire or 2-wire earth measurement and 4-wire ground resistivity ........72 ...
Gx Series 1. PRECAUTIONS AND SAFETY MEASURES The models of the Gx Series have been designed in compliance with Directives IEC/EN61557 and IEC/EN61010, relevant to electronic measuring instruments. Before and after carrying out the measurements, carefully observe the following instructions: ...
Gx Series 1.2. DURING USE Please carefully read the following recommendations and instructions: CAUTION Failure to comply with the caution notes and/or instructions may damage the instrument and/or its components or be a source of danger for the operator. Before changing function, disconnect the test leads from the circuit under test. ...
Gx Series 2. GENERAL DESCRIPTION 2.1. FOREWORD This user manual is referred to the following models MACROEVTEST, MACROTESTG3, MACROTESTG2, MACROTESTG1, COMBIG2, COMBITEST425, COMBITEST425EV, SUPERCOMBI, COMBIG2PLUS, MT-300 and COMBIG3. The model MT-300 is the same of MACROEVTEST. The models COMBITEST425EV and COMBIG2PLUS are the same of COMBIG2.
Gx Series 2.2. INSTRUMENT FUNCTIONS The instrument is equipped with a TFT color LCD display, with capacitive "touch-screen" that can be handled simply with the touch of a finger by the user and is structured with an icon-based menu allowing the direct selection of measurement functions for quick and intuitive use.
Gx Series 3. PREPARATION FOR USE 3.1. INITIAL CHECKS Before shipping, the instrument has been checked from an electric as well as mechanical point of view. All possible precautions have been taken so that the instrument is delivered undamaged. However, we recommend checking it to detect any damage possibly suffered during transport.
4.5. INITIAL SCREEN When switching on the instrument, the initial screen appears for a few seconds. It shows: The HT manufacturer's logo The instrument model The Firmware version of the two instrument's internal microprocessors (LCD and CPU) ...
Gx Series 5. GENERAL MENU Pressing the ENTER key in any condition of the instrument allows to go back to the general menu in which internal parameters may be set, the saved measures can be displayed and the desired measuring function may be selected. Fig.
Gx Series 5.1.2. Reference country Touch the icon to select the reference country. This choice have influence on the LOOP, NoTrip and EARTH measurements. The screen to the side appears on the display. Select the desired country, confirm the choice and return to the previous screen.
Gx Series 5.1.6. System date/time setting Touch the icon to set the system date/time. The screen to the side appears on the display. Touch the "EU" icon for the European date/time system in the format "DD/MM/YY hh:mm" or the "US" icon for the American system in the format "MM/DD/YY hh:mm AM/PM".
Gx Series 6. OPERATING INSTRUCTIONS 6.1. RPE: CONTINUITY OF PROTECTIVE CONDUCTORS This function is performed in compliance with standards IEC/EN61557-4, BS7671 17th edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the resistance of protective and equipotential conductors. CAUTION The instrument can be used for measurements on installations with overvoltage category CAT IV 300V to earth and max 415V between inputs ...
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Gx Series Touch the icon. The screen to the side appears on the display. The instrument automatically carries out the test for the presence of voltage between the inputs (shown on the display) and blocks the test in case of voltage higher than 10V.
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Gx Series Touch the icon to activate the measurement. After a few seconds, the instrument provides the screen to the side if the operation is successful (Rcables 5); the indication of the value is shown in the "Rcal" field and the icon is shown on the display.
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Gx Series At the end of the test in the AUTO function if the value of the measured resistance is higher than the set limit, the screen to the side is shown on the display. The value is shown in red and the symbol indicates the negative result of the measurement.
Gx Series 6.1.1. Anomalous situations In AUTO or " " modes if the instrument detects a resistance lower than the set limit value but for which is it not able to generate a current of 200mA, the screen to the side is displayed. symbol is shown on the display and the values of the real test current are indicated in red.
Gx Series 6.2. M: MEASUREMENT OF INSULATION RESISTANCE This function is performed in compliance with standards IEC/EN61557-2, BS7671 17th edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the insulation resistance between the active conductors and between each active conductor and the earth. CAUTION ...
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Gx Series Fig. 9: Insulation test between L-PE by means of shuko plug Fig. 10: Insulation test between L-PE and N-PE by means of single cables and remote lead Fig. 11: Insulation test between L-PE and N-PE by means of shuko plug EN - 19...
Gx Series 6.2.1. AUTO or L-PE Timer mode Touch the icon. The screen to the side appears on the display. The instrument automatically carries out the test for the presence of voltage between the inputs (shown on the display) and blocks the test in case of voltage higher than 10V Touch the “AUTO L-PE”...
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Gx Series CAUTION Disconnect any cable not strictly involved in measurement and especially check that no cable is connected to In1 input. Before connecting the test leads, make sure that there is no voltage at the ends of the conductors to be tested. Connect the alligator clips and/or test leads and/or remote lead to the ends of the conductors to be tested as in Fig.
Gx Series 6.2.2. AUTO L/N-PE mode Touch the icon. The screen to the side appears on the display. The instrument automatically carries out the test for the presence of voltage between the inputs (shown on the display) and blocks the test in case of voltage higher than 10V Touch the “AUTO L/N-PE”...
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Gx Series 6. Press the GO/STOP key on the instrument or the START key on the remote lead. The instrument will start the insulation measurement in sequence before between L-PE and then between N-PE CAUTION During this whole stage, do not disconnect the test leads of the instrument from the conductor under test.
Gx Series 6.2.3. Anomalous situations In the L-PE test if the instrument measures a resistance higher than the set limit value but for which it is not able to generate the rated voltage, the screen to the side is displayed. symbol is shown on the display and the values of the real test voltage are indicated in red.
Gx Series 6.3. RCD: TEST ON DIFFERENTIAL SWITCHES This function is performed in compliance with standard IEC/EN61557-6, BS7671 17th edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the tripping time and current of molded case differential switches of type A ( ), AC ( ) and B ( ), being General (G),...
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Gx Series Fig. 14: Connection for a 400V + N + PE three-phase system by means of single cables and remote lead Fig. 15: Connection for a 400V + N (no PE) three-phase system by means of single cables and remote lead Fig.
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Gx Series Touch the icon. The screen to the side appears on the display. Touch the icon to the left to set the RCD operating mode. The following screen appears on the display: Move the slide bar reference by selecting the desired operating mode between the options: G (General), S (Selective), (Delayed).
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Gx Series Touch the third icon at the bottom of display and select the desired type of test among the options:: x ½ Manual with multiplier ½ Idn x 1 Manual with multiplier 1Idn x 2 Manual with multiplier 2Idn ...
Gx Series 6.3.1. AUTO mode 9. Press the GO/STOP key for few seconds on the instrument or the START key on the remote lead. The instrument will start the measurement. The screen to the side is shown on the display when the hourglass icon indicates the performance of the test.
Gx Series 6.3.2. AUTO+ mode 9. Press the GO/STOP key for few seconds on the instrument or the START key on the remote lead. The instrument will start the measurement. The screen to the side is shown on the display when the hourglass icon indicates the performance of the test.
Gx Series 6.3.3. x½, x1, x2, x5 modes 9. Press the GO/STOP key for few seconds on the instrument or the START key on the remote lead. The instrument will start the measurement. The screen to the side (concerning multiplier x1) is shown on the display when the hourglass icon indicates the performance of the test.
Gx Series 6.3.5. Mode The standard defines, for molded case type STD, the tripping times for RCDs at nominal current. The mode is used to detect the minimum tripping current (which could also be lower than the nominal voltage). 9. Press the GO/STOP key for few seconds on the instrument or the START key on the remote lead.
Gx Series 6.3.6. Test on earth leakage relay RCD The instrument allows performing tests on earth leakage relay RCD with currents up to 10A (with optional accessory RCDX10) 8. Connect the instrument and the optional accessory RCDX10 to the installation (see Fig. 17).
Gx Series 6.3.7. Anomalous situations 1. If the voltage between inputs B1 and B4 and inputs B1 and B3 is higher than 265V, the instrument provides the warning screen shown to the side and blocks the execution of the tests. 2.
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Gx Series 6. If the instrument detects that the phase and neutral leads are inverted, it does not carry out the test and a screen similar to the one reported to the side is displayed. Rotate the shuko plug or check the connection of measuring cables.
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Gx Series 11 If the instrument detects a voltage Vn-pe > 50V (or the analogue Vn-pe >25V) it provides the warning screen shown to the side and blocks the test for safety reasons. Check the PE conductor and earth plant efficiency 12 If the instrument detects in the input terminals a too high external impedance such that it can not provides...
Gx Series 6.4. LOOP: LINE IMPEDANCE/LOOP AND OVERALL EARTH RESISTANCE This function is performed in compliance with standard IEC/EN61557-3, BS7671 17th edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the line impedance, the fault loop impedance and the prospective short-circuit current. CAUTION Depending on the selected electrical system (TT, TN or IT) some kind of connection and function modes are disabled by the instruments (see Table 2 )
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Gx Series Fig. 20: P-N/P-PE measurement for 400V+N+PE three-phase systems by means of single cables and remote lead Fig. 21: P-P measurement for 400V+N+PE three-phase systems Fig. 22: P-PE/P-N measurement for 400V + PE (no N) systems by means of single cables and remote lead Fig.
Gx Series 6.4.1. Test types The protection of electrical lines is the essential part of a project so as to guarantee the correct functionality and avoid damages to persons or property. To this purpose, the safety guidelines impose on electrical designers also to design the electrical installation in order to reach: 1.
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Gx Series The following table summarizes the possible measures executable depending on the type of system (TT, TN and IT), of selected modes and the relationships that define limit values Mode Condition x OK outcome Condition x OK outcome Condition x OK outcome No outcome No outcome No outcome...
Gx Series 6.4.2 Test leads calibration (ZEROLOOP) In order to obtain better results, it is strongly recommended to perform the preliminary calibration of the test cables or the cable with Shuko plug by using the ZEROLOOP accessory before performing the test. In this way the instrument automatically subtracts the resistance of the test cables, providing the effective result on the display.
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Gx Series 4. Touch the icon to start the calibration. In the field the resistance of test leads is shown. This valie will be automatically subtracted by the instrument at the end of Loop measurement The instrument displays the symbol to indicate the positive outcome of teast leads calibration (Rcal <1) and the screen to the side appears on the display...
Gx Series 6.4.3 STD Mode – Generic test This mode performs the impedance measurement and the calculation of prospective short circuit current without applying any evaluation. Therefore, at the end of the test, no outcome is given by the instrument. 1.
Gx Series 6.4.4. Mode kA – Verify of breaking capacity of protection device 1. Select the options “TN, TT or “IT”, “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon.
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Gx Series 5. Press the GO/STOP key for few seconds or the START key on the remote lead. During this whole stage, do not disconnect the measuring leads of the instrument from the system under test. In case of positive outcome, the screen to the side is shown by the instrument.
Gx Series 6.4.5. Mode I t – Verify of protection against short-circuit CAUTION The verify of conductor protection against the thermic effect of short-circuit is performed under the following conditions: Ambient temperature of 25°C Presence of external insulation (not live conductor) ...
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Gx Series 4. Touch the icon to zero the value in the In field and use the virtual keyboard to set the value of the RCD rated current within the values allowed by the instrument. The following selections are available on the instrument ...
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Gx Series 6. If possible, disconnect all loads connected downstream of the measured point, as the impedance of these users could distort the test results. Perform the preliminary calibration of the test leads as described in § 6.4.2 Connect the shuko plug, the alligator clips or the remote lead to the electrical mains according to Fig.
Gx Series 6.4.6. Mode - Verify of protection coordination 1. Select the reference country (see § 5.1.2), the options “TN, TT or “IT”, “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). NOTE: for “USA” country the TT and IT systems are not available Touch the icon.
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Gx Series 5. Move the slide bar reference by selecting the protection tripping time between the options: 0.1s, 0.2s, 0.4s, 1s, 5s (all countries except AUS/NZ and UK), 0.4s, 5s (option L-PE, Fuse protection for AUS/NZ and UK) and 0.4s (option L-PE, MCB protection for AUS/NZ). Confirm the choice by going back to the initial measurement screen.
Gx Series 6.4.7. Mode - Verify of protection coordination – Norvay country 1. Select the “Norvay” country (see § 5.1.2), the options “TN, or “IT”, “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see §...
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Gx Series 5. Move the slide bar reference by selecting the protection tripping time between the options: 0.1s, 0.2s, 0.4s,1s, 5s. Confirm the choice by going back to the initial measurement screen. Touch the “k Isc” field to set the calculation coefficient of the short circuit current Isc.
Gx Series 6.4.8. Verify of protection against indirect contacts (TN system) 1. Select the options "TN", “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side appears on the display.
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Gx Series 6. If possible, disconnect all loads connected downstream of the measured point, as the impedance of these users could distort the test results. Perform the preliminary calibration of the test leads as described in § 6.4.2 Connect the alligator clips or the remote lead to the electrical mains according to Fig.
Gx Series 6.4.9. Verify of protection against indirect contacts (NoTrip test) 1. Select the options "TN", “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side appears on the display.
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Gx Series 6. If possible, disconnect all loads connected downstream of the measured point, as the impedance of these users could distort the test results. Perform the preliminary calibration of the test leads as described in § 6.4.2 Connect the alligator clips or the remote lead to the electrical mains according to Fig.
Gx Series 6.4.10. Verify of protection against indirect contacts (No Trip test – UK Country) 1. Select the “UK” country (see § 5.1.2) , options "TN", “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon.
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Gx Series 6. If possible, disconnect all loads connected downstream of the measured point, as the impedance of these users could distort the test results. Perform the preliminary calibration of the test leads as described in § 6.4.2 Connect the alligator clips or the remote lead to the electrical mains according to Fig.
Gx Series 6.4.11. Verify of protection against indirect contacts (IT systems) 1. Select the options "IT", “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side appears on the display.
Gx Series 6.4.12. Verify of protection against indirect contacts (TT systems) 1. Select the options "TT", “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side appears on the display.
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Gx Series 5. Press the GO/STOP key for few seconds or the START key on the remote lead. During this whole stage, do not disconnect the measuring leads of the instrument from the system under test. In case of positive result (overall earth resistance lower than the ratio between limit contact voltage and RCD tripping current), the screen to the side is displayed by the instrument, which contains the contact voltage...
Gx Series 6.4.13. Impedance measurement by means of the accessory IMP57 Impedance measurements performed with the optional accessory IMP57 involve its connection to the Master unit via optical connector through the optical cable/RS-232 C2001 supplied with same accessory. The IMP57 must be directly powered by the mains on which measurements are performed. For detailed information, please refer to the user manual of the accessory IMP57.
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Gx Series 4. The symbol indicates the correct connection and recognition of the IMP57 by the instrument. Check the green STATUS LED lighting on the IMP57. The value of the voltage between the measurement points is shown in the upper part of the display. Press the GO/STOP key for few seconds on the instrument to start the test.
Gx Series 6.4.14. Anomalous situations 1. If the instrument detects an L-N or L-PE voltage higher than the maximum limit (265V), it does not carry out the test and displays a screen like the one to the side. Check the connection of measuring cables. 2.
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Gx Series 6. If the instrument detects that the phase and neutral leads are inverted, it does not carry out the test and a screen similar to the one reported to the side is displayed. Rotate the shuko plug or check the connection of measuring cables.
Gx Series 6.5. SEQ: PHASE SEQUENCE AND PHASE CONCORDANCE TEST This function is performed in compliance with standards IEC/EN61557-7 and allows testing the phase sequence and concordance by direct contact with live parts (not on cables with insulating sheath). The following operating modes are available: one lead measurement two leads measurement.
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Gx Series 3. Insert the blue and black connectors of the single cables in the corresponding input terminals of the instrument B4, B1 (2T measurement). Insert in the free end of the cables the corresponding alligator clips or tips. It is also possible to use the remote lead by inserting its multipolar connector into the input lead B1.
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Gx Series 8. At the end of the test, if the detected phase sequence is correct, the instrument displays a screen like the one shown to the side (result "1-2-3"). Press the SAVE button or touch the icon to save the measurement (see §...
Gx Series 6.5.1. Anomalous situations 1. If between the test start and the acquisition of the first voltage or between the acquisition of the first and second voltage, a time longer than around 10s has elapsed, the instrument displays a screen like the one to the side. 2.
Gx Series 6.6. LEAKAGE: LEAKAGE CURRENT MEASUREMENT Using an external clamp, this function allows measuring the leakage current (by means of the optional accessory HT96U). Fig. 26: Indirect measurement of leakage current in three-phase systems Fig. 27: Direct measurement of leakage current in three-phase systems Touch the icon.
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Gx Series 5. The value of the measured leakage current appears in real time on the display as shown in the screen to the side. Press the SAVE button or touch the icon to save the measurement (see § 7.1). EN - 71...
Gx Series 6.7. EARTH: MEASUREMENT OF EARTH RESISTANCE The instrument allows performing the measurement of earth resistance of an installation in the following ways: Measurement of earth resistance with 3-wire or 2-wire voltammetric method Measurement of ground resistivity () with Wenner 4-wire method ...
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Gx Series Fig. 29: Two-wire earth resistance measurement using an auxiliary rod Fig. 30: Two-wire earth resistance measurement from the panel board Fig. 31: Ground resistivity measurement EN - 73...
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Gx Series 1. Select the options “TN, TT or “IT”, “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side (TT and IT systems) is shown on the display.
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Gx Series Touch the icon to zero the value in the "A" field and use the virtual keyboard to set the value of fault current (declared by the Energy distribution board) between 1A and 9999A. Confirm the choice by going back to the initial measurement screen.
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Gx Series 11Drive the auxiliary rods into the ground keeping to the distance instructions provided by the standards (see § 0). 12Connect the alligator clips to the auxiliary rods and to the installation under test according to Fig. 28, Fig. 29, Fig. 30 or Fig. 31. 13 Press the GO/STOP key.
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Gx Series 16 For earth resistance measurement in TN systems, in case of positive result (see § 13.12), the screen to the side is displayed by the instrument. It contains the value of contact voltage in the secondary display, the value of contact resistance of the voltage probe (Rs) and the value of contact resistance of the current probe (Rh).
Gx Series 6.7.2. 3-wire or 2-wire earth measure – USA, Extra Europe and Germany countries 1. Select the “USA”, “Extra Europe” or “Germany” reference countries (see § 5.1.2). Select the options “TN”, “TT” (measurement not available for USA country) or “IT” (measurement not available for USA country), “25 or 50V”, “50Hz or 60Hz”...
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Gx Series Touch the icon to zero the value in the "" field and use the virtual keyboard to set the value of limit earth resistance between 1 and 999. Confirm the choice by going back to the initial measurement screen. Connect the instrument to the installation as indicated in the points 9, 10, 11 and 12 of the §...
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Gx Series 9. For earth resistance measurement in TN systems, in case of positive result (measured value LOWER than set limit value), the screen to the side is displayed by the instrument. It contains also the value of contact resistance of the voltage probe (Rs) and the value of contact resistance of the current probe (Rh).
Gx Series 6.7.3. Earth measurement with optional clamp T2100 This measurement allows evaluating the partial resistances of the single earth rods of complex ring networks without disconnecting them and performs the calculation of the corresponden parallel resistance. Please refer to the user manual of clamp T2100 for specific details.
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Gx Series 1. Select the options “TN, TT or “IT”, “25 or 50V”, “50Hz or 60Hz” and the reference voltage in the general settings of the instrument (see § 5.1.4). Touch the icon, touch the first icon in the lower left corner and set the measurement mode (see §...
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Gx Series 5. After the insertion of the value of the first rod it will be not possible to transfer the eventually measrements saved inside the T2100 by means the key. Perform the same procedure for each rod of the network in question. At the end of the measurements, press the GO/STOP key on the instrument.
Gx Series 6.7.4. Anomalous situations in 3-wire and 2-wire earth measurements 1. When starting a measurement, if the instrument detects an interfering voltage higher than 10V at the volt and ampere circuits input, it does not perform the test and displays the screen to the side.
Gx Series 6.8. AUX: MEASURE OF AMBIENT PARAMETERS VIA EXTERNAL PROBES By means of external transducers, this function allows measuring the following environmental parameters: °C air temperature in °C by means of thermometric transducer °F air temperature in °F by means of thermometric transducer Lux(20) illuminance of white light sources and LED sources by means of luxmetric transducer with a 20Lux capacity Lux(2k) illuminance of white light sources and LED sources by means of luxmetric...
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Gx Series If the HT53L probe is used, select the color of the LED source under test from the options: STD (standard white light source), White, Red, Yellow, Green, Blue and Purple as shown in the screen to the side Confirm the choices by going back to the initial measurement screen 4.
Gx Series 6.9. ΔV%: VOLTAGE DROP OF MAIN LINES This feature allows to evaluating the percentage value of voltage drop between two points of a main line in which a protection device is installed and comparing this value to possible limit value specified by guidelines.
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Gx Series 1. Select the option “50Hz or 60Hz” and the reference Phase-Neutral or Phase-Phase voltage in the general settings of the instrument (see § 5.1.4). Touch the icon. The screen to the side appears on the display. Touch the lower left icon to set the type of measurement.
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Gx Series Touch the icon to zero the value in the “%” field and use the virtual keyboard to set the value of V% in the range 1% to 99%. Confirm the selection and go back to the previous screen 6.
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Gx Series 10 Press the GO/STOP key on the instrument to measure the Z2 impedance and complete the V% voltage drop measurement. During this whole stage, do not disconnect the measuring leads of the instrument from the system being tested In case of positive result (maximum percentage value of calculated voltage drop according to §...
Gx Series 6.9.1. Anomalous situations 1. If the instrument detects an L-N or L-PE voltage higher than the maximum limit (265V), it does not carry out the test and displays a screen like the one to the side. Check the connection of measuring cables 2.
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Gx Series 6. If the instrument detects that the phase and neutral leads are inverted, it does not carry out the test and a screen similar to the one reported to the side is displayed. Rotate the shuko plug or check the connection of measuring cables 7.
Gx Series 6.10. AUTO TEST: AUTOMATIC TEST SEQUENCE (NOTRIP , RCD, M) This function allows to perform in automatic sequence the following measurements: Overall earth resistance without causing the RCD tripping (NoTrip ) Tripping time and tripping current of General RCD type A ( ), AC ( ) or B ( ...
Gx Series 4. Insert the green, blue and black connectors of the three-pin shuko plug into the relevant instrument input terminals B3, B4, B1. As an alternative, use the single cables and apply the relevant alligator clips to the free ends of the cables. It is also possible to use the remote lead by inserting its multipolar connector into the input lead B1.
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Gx Series 9. In case of positive result of the three test sequentially performed as NoTrip (see § 13.8), RCD (see § 13.4) and M L/N-PE the symbol is shown and the screen to the side is displayed by the instrument. Press the SAVE button or touch the icon to save the measurement (see §...
Gx Series 14 In case of negative result of the M N-PE, the auto test is automatically blocked, the symbol is shown the screen to the side is displayed. Note red value (lower than minimum set trhreshold) of the N-PE insulation resistance Press the SAVE button or touch the icon to save...
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Gx Series 10 In case of negative result of the NoTrip (Z and/or >199), the auto test is automatically blocked, the L-PE symbol is shown and the screen to the side is displayed. Note red value of the relative Loop impedance Press the SAVE button or touch the icon to save...
Gx Series 6.10.3. Anomalous situations 1. If the instrument detects an L-N or L-PE voltage higher than the maximum limit (265V), it does not carry out the test and displays a screen like the one to the side. Check the connection of measuring cables 2.
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Gx Series 6. If the instrument detects that the phase and neutral leads are inverted, it does not carry out the test and a screen similar to the one reported to the side is displayed. Rotate the shuko plug or check the connection of measuring cables 7.
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Gx Series 11 If the instrument detects a voltage value higher than 10V at its terminals, it does not carry out the L/N-PE insulation test, gives out a long sound and the screen reported here to the side is displayed EN - 100...
Gx Series 6.11. PQA: REAL TIME MEASUREMENT OF MAIN PARAMETERS This feature allows to performing real time measurements of voltage, current (with optional transducer clamp), powers, power factors and harmonic analysis on Single phase and Three phase balanced systems. Fig. 36: Connection for measurement on Single phase installations Fig.
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Gx Series Touch the icon to zero the value into the “FS” field and use the virtual keyboard to set the full scale of the used transducer clamp. This value is within the range: 1A 3000A Touch the right bottom icon to set the type of measurement.
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Gx Series 7. Touch the icon “ ”to display the parameters of harmonic analysis. The display shows the screen on the right (relative to a Single phase plant. The display shows the histogram graphic of the percentage amplitude relative to the fundamental and the voltage harmonic V1N (Single phase) or VL1-L2 (Three phase balanced) and the fundamental and the current harmonics from 1...
Gx Series 6.12. EVSE: SAFETY TEST FOR ELECTRIC CAR CHARGING STATIONS This function allows to perform a complete electrical safety test on the charging stations of electric cars (EVSE - Electrical Vehicle Supply Equipment) systems in connection with the optional adapter EV-TEST100 capable of simulating the presence of an electric vehicle, measuring the output voltage signals and simulate fault conditions in accordance with the reference IEC/EN61851-1 and IEC/EN60364-7-722 guidelines.
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Gx Series Fig. 38: Connection of the EV-TEST100 adapter to the instrument and the EVSE system Test 1 Continuity test of PE protective conductor of the EVSE system Press GO/STOP button to start the test sequence. The screen to the side is shown on the display. Connect the instrument to the adapter as shown in the diagram on the display (input B4 on input E and input B1 to the main earth collector of the system).
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Gx Series 7. The value of the result is shown in the upper part of the screen while the partial values of the tests with inverted polarity of the test source in addition to the actual test currents are shown in the fields "R +" and "R-" The symbol indicates the correct result of the measurement.
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Gx Series Test 2 Insulation measurement of EVSE system Connect the instrument to the adapter as shown in the screen on the display (input B4 on input N, input B3 on input E and input B1 on input L1) Act on the three adapter selectors by setting the followed positions as shown by the instrument by flashing red/blue...
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Gx Series 14 Connect the input B1 on the input L2 of adapter shown in the screen to the side Press the icon to continue with the test or press the icon to exit the test and return to the initial screen The measurement result of the L2PE test is shown in the screen to the side.
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Gx Series 18 At the end of the test, if the value of the measured resistance in one or both test should be lower than the set limit, the screen to the side is shown on the display. The value is shown in red and the symbol indicates the negative result of the measurement Press again the GO/STOP key to repeat the test...
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Gx Series Test 3 Check states of the EVSE system The purpose of this test (consisting of 6 steps) is to check all the internal states of the EVSE system in accordance with the prescriptions of the reference standards by performing simulations with the EV-TEST100 accessory connected.
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Gx Series Connect the instrument to the adapter as shown in the diagram on the display (input B4 on input N, input B3 on input E and input B1 on input L1). Act on the three adapter selectors by setting the followed positions as shown by the instrument by flashing red/blue indications:...
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Gx Series Act on the three adapter selectors by setting the following positions as shown by the instrument with flashing red/blue indications: PP State 13A,20A,32A or 63A CP State B Fault OK Try to remove the connection plug of the EV-TEST100 adapter in order to check if the EVSE system performs the correct locking as indicated in the screen to the side...
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Gx Series If the test fails, the screen like the one on the side is shown on the display. The incorrect value of the parameter is shown in red and the symbol indicates the non-ok result of the measurement. Press again the GO/STOP key to repeat the test Press the SAVE key or touch the icon for the partial saving of the test and to end the test sequence.
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Gx Series If the test fails, the screen like the one on the side is shown on the display. The incorrect value of the parameter is shown in red and the symbol indicates the non-ok result of the measurement. Press again the GO/STOP key to repeat the test Press the SAVE key or touch the icon for the partial saving of the test and to end the test sequence.
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Gx Series If the test fails, the screen like the one on the side is shown on the display. The incorrect value of the parameter is shown in red and the symbol indicates the non-ok result of the measurement. Press again the GO/STOP key to repeat the test Press the SAVE key or touch the icon for the partial saving of the test and to end the test sequence.
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Gx Series If the test fails, the screen like the one on the side is shown on the display. The incorrect value of the parameter is shown in red and the symbol indicates the non-ok result of the measurement. Press again the GO/STOP key to repeat the test Press the SAVE key or touch the icon for the partial saving of the test and to end the test sequence.
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Gx Series If the test fails, the screen like the one on the side is shown on the display. The incorrect value of the parameter is shown in red and the symbol indicates the non-ok result of the measurement. Press again the GO/STOP key to repeat the test Press the SAVE key or touch the icon for the partial saving of the test and to end the test sequence.
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Gx Series During this whole phase, do not disconnect the measuring terminals of the instrument from the system on test. In case of positive outcome (global earth resistance lower than the ratio between the limit contact voltage and the RCD tripping current - see § 13.8), the screen to the side is shown by the instrument in which the contact voltage value is indicated on the secondary display.
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Gx Series During this whole phase, do not disconnect the measuring terminals of the instrument from the system. In case of positive result (Z or Z LOWER or L-PE EQUAL to limit impedance relative to protection device within the specified time – see § 13.7), the screen to the side is displayed by the instrument.
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Gx Series Test 5 Test of RCD type A of EVSE system Connect the instrument to the adapter as shown in the diagram on the display (input B4 on input N, input B3 on input E and input B1 on input L1).
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Gx Series During this whole phase, do not disconnect the measuring terminals of the instrument from the system At the end of the test, if the tripping current is within the values of the table in the relevant § 11.1 the instrument displays the symbol to indicate the positive outcome of the test and displays a screen like the one...
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Gx Series Test 6 Test of RCD type B of EVSE system Connect the instrument to the adapter as shown in the diagram on the display (input B4 on input N, input B3 on input E and input B1 on input L1).
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Gx Series During this whole phase, do not disconnect the measuring terminals of the instrument from the system. At the end of the test, if the tripping current is within the values of the table in the relevant § 11.1 the instrument displays the symbol to indicate the positive outcome of the test and displays a screen like the one...
Gx Series 7. OPERATIONS WITH THE MEMORY 7.1. SAVING MEASUREMENTS The structure of the memory area (999 locations), of "tree" type with the possibility to expand/hide the nodes, allows the division up to 3 markers nested so as to finalize the precise locations of the measuring points with the insertion of test results.
Gx Series 7.2. RECALLING MEASUREMENTS AND DELETING THE MEMORY Touch the icon in the general menu. The screen to the side appears on the display. Each measurement is identified by the icons (test with positive result) (test with negative result). Touch the desired measurement to select it on the display.
Gx Series 7.2.1. Anomalous situations 1. In case there is no measure saved and the instrument memory is accessed, a screen similar to the one reported here to the side is displayed. 2. In case tries to define a new sub-node over the 3rd level the instrument provides the warning screen shown to the side and blocks the operation 3.
Gx Series 8. CONNECTING THE INSTRUMENT TO A PC OR MOBILE DEVICES The connection between a PC and the instrument can be done via a serial port (see Fig. 3) by means of an optical cable/USB C2006 or by means a WiFi connection. Before making the connection in USB mode, it is necessary to install on the PC the C2006 cable drivers present in the supplied CD-ROM in addition to the management software.
Gx Series 9. USE OF STRAP SET It is possible to use a strap set (SP-0500 optional accessory) which allows the operator to carry the instrument on his shoulder. The strap set (see Fig.38) is composed of the following parts: CAPTION 1.
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Gx Series Fig. 41: Mounting hooks to fix straps 3. The instrument with the fitted half-shells and hooks must be as shown in Fig. 41 Fig. 42: Instrument with fitted half-shells and hooks EN - 129...
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Gx Series 4. Connect the snap-hooks of the shoulder strap (see Fig. 38 - part 3) to the two hooks on the top of the instrument, adjusting the inner part which surrounds the operator's neck (see Fig. 42) Fig. 43: Complete mounting of set strap 5.
Gx Series MAINTENANCE 10.1. GENERAL INFORMATION While using and storing the instrument, carefully observe the recommendations listed in this manual in order to prevent possible damage or danger during use. Do not use the instrument in environments with high humidity levels or high temperatures.
Gx Series TECHNICAL SPECIFICATIONS Accuracy is calculated as: ±[%reading + (no. of digits) * resolution] at 23°C, <80%RH. Refer to the Table 1 for the correspondence between models and availbale features 11.1. TECHNICAL CHARACTERISTICS AC TRMS voltage Range [V] Resolution [V] Accuracy 15 ...
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Gx Series Test on RCD protection (Molded case type) Differential protection type (RCD): AC ( ), A ( ), B( ) – General (G), Selective (S) and Delayed ( ) Voltage range Phase-Earth, Phase-Neutral: 100V 265V RCD type AC and A, 190V 265V RCD type B Rated tripping currents (IN): 6mA,10mA, 30mA, 100mA, 300mA, 500mA, 650mA, 1000mA 50/60Hz ...
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Gx Series Test on RCD without integral current breaking device (with accessory RCDX10) Differential protection type (RCD): AC ( ), A ( ), B( ) – Generali (G), Selettivi (S) e Ritardati ( ) 100V 265V RCD type AC and A, 190V 265V RCD type B Voltage range Phase-Earth, Phase-Neutral: 0.3A ...
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Gx Series Contact voltage (measured during RCD and NoTrip test) Range [V] Resolution [V] Accuracy Ut LIM -0%, +(5.0 rdg + 3V) Contact voltage (EARTH test – TT systems) Range [V] Resolution [V] Accuracy 0 99.9 -0%, +(5.0 lettura + 3V) Contact voltage (EARTH test –...
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Gx Series MEASUREMENT OF NETWORK PARAMETERS AND HARMONICS Voltage Range [V] Resolution [V] Accuracy 15.0 459.9 (1.0rdg + 1dgt) 0.1V 1,5 ; Frequency: 42.5 69.0 Hz Crest factor Frequency Range [Hz] Resolution [Hz] Accuracy 42.5 69.0 (2.0rdg + 2dgt) 0.01 Allowed voltage: 15.0 ...
Gx Series SERVICE 12.1. WARRANTY CONDITIONS This instrument is warranted against any material or manufacturing defect, in compliance with the general sales conditions. During the warranty period, defective parts may be replaced. However, the manufacturer reserves the right to repair or replace the product. Should the instrument be returned to the After-sales Service or to a Dealer, transport will be at the Customers charge.
Gx Series THEORETICAL APPENDIXES 13.1. CONTINUITY OF PROTECTIVE CONDUCTORS Purpose of the test Check the continuity of: Protective conductors (PE), main equalizing potential conductors (EQP), secondary equalizing potential conductors (EQS) in TT and TN-S systems Neutral conductors having functions of protective conductors (PEN) in TN-C system. This test is to be preceded by a visual check verifying the existence of yellow-green protective and equalizing potential conductors as well as compliance of the sections used with the standards requirements.
Gx Series 13.2. INSULATION RESISTANCE Purpose of the test Check that the insulation resistance of the installation complies with the requirements of the applicable guidelines. This test has to be performed with the circuit being tested not powered and with the possible loads it supplies disconnected. Parts of the system to be checked Check that the insulation resistance between: ...
Gx Series 13.3. CHECKING CIRCUIT SEPARATION Definitions A SELV system is a zero-category system or safety extra low voltage system characterized by power supply from an independent (e.g. batteries, small generator set) or safety source (e.g. safety transformer), protective separation from other electrical systems (double or reinforced insulation or earthed metal screen) and absence of earthed points (insulated from the earth).
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Gx Series EXAMPLE OF SEPARATION TEST BETWEEN ELECTRICAL CIRCUITS Insulation or safety transformer separating the circuits TEST BETWEEN ACTIVE PARTS Connect an instrument probe to one of the two conductors of the separated circuit and the other to one of the conductors of a non- separated circuit.
Gx Series 13.4. TEST ON DIFFERENTIAL SWITCHES (RCD) Purpose of the test Checking that the General (G) and Selective (S) and Delayed ( ) differential protection devices have been correctly installed and adjusted and that they maintain their characteristics over time. The check must make sure that the differential switch trips at a current not higher than its nominal operating current IdN and that the tripping time meets the following conditions, according to the case: ...
Gx Series Measurement of tripping current for protection differential switches This test aims at checking the real tripping current of general differential switches (it does not apply to selective differential switches). In the presence of differential switches with selectable tripping current, it is useful to perform this test in order to check the real tripping current of the differential switch.
Gx Series 13.6. VERIFY OF PROTECTION AGAINST INDIRECT CONTACTS IN TN SYSTEMS Purpose of the test The protection against indirect contacts in the TN systems must be guarantee by means a protection device against the overcurrents (typically MCB or fuse) which swich off the power supply of the circuit or the electrical equipment in case of fault between an active part and a ground mass or a protection conductor within a interval not exceeding at 5s, sufficient for the equipments, or in compliance with the times declared in the following...
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Gx Series Depending on the set values of phase-phase, phase-neutral or phase-PE voltage (see § 5.1.4) and the measured value of fault loop impedance, the instrument calculates the minimum value of the assumed short-circuit current to be interrupted by the protection device.
Gx Series 13.7. NO TRIP TEST IN TN SYSTEMS The protection against indirect contacts in the TN systems must be guarantee by means a protection device against the overcurrents (typically MCB or fuse) which swich off the power supply of the circuit or the electrical equipment in case of fault between an active part and a ground mass or a protection conductor within a interval not exceeding at 5s, sufficient for the equipments.
Gx Series 13.8. VERIFY OF PROTECTION AGAINST INDIRECT CONTACTS IN TT SYSTEMS Purpose of the test Checking that the protection device is coordinated with the value of earth resistance. We cannot assume a priori a reference limit value for earth resistance as a reference when checking the measurements result.
Gx Series 13.9. VERIFY OF PROTECTION AGAINST INDIRECT CONTACTS IN IT SYSTEMS In IT systems the active parts must be isolated from the ground or be connected to earth through an impedance of sufficiently high value. In the case of a single earth fault current of the first fault is weak and therefore it is not necessary to interrupt the circuit.
Gx Series 13.10. VERIFY OF PROTECTION COORDINATION L-L, L-N AND L-PE Purpose of the test Test the coordination of protective devices (typically MCB or fuse) present in a Single- phase or Three-phase installation as a function of the limit time of fault extinction by the protection set by the user and the calculated value of the short-circuit current.
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Gx Series CAUTION The instrument must be used to measure fault loop impedance values at least 10 times higher than the resolution value of the instrument in order to minimize errors. Depending on the set values of nominal voltage (see § 5.1.4) and the measured value of fault loop impedance, the instrument calculates the minimum value of the assumed short- circuit current to be interrupted by the protection device.
Gx Series 13.11. VERIFY OF THE PROTECTION AGAINST SHORT CIRCUITS – TEST I2T The I t parameter represents the specific energy (expressed in A s) let through by the protective device in short-circuit condition. The I t energy must be able to be supported both by the cables and by the distribution bars.
Gx Series 13.12. VERIFICATION OF VOLTAGE DROP ON MAIN LINES Measurement voltage drop as a result of current flow through a main line or a part of it can be very important if it is necessary: Verify the capability of an existing main line to supply a load ...
Gx Series 13.13. MEASUREMENT OF EARTH RESISTANCE IN TN SYSTEMS Purpose of the test Check that the measured value of earth resistance is lower than the maximum limit calculated on the basis of the maximum allowable contact voltage Utp for the system. In accordance with the requirements of standard EN50522 (for USA, Germany and Extra Europe countries refer to the respective guidelines) the maximum allowable contact voltage is dependent on the time duration of the fault according to the following Table 9...
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Gx Series Measurement of earth impedance by voltammetric method Creating cables extensions If the length of the cables supplied with the instrument is not enough, you can create your own extensions to carry out the measurements in the system without influencing the instrument accuracy and, by the nature of the voltammetric method, without the need to perform any compensation of measuring cable resistance.
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Gx Series Big-sized earth networks This technique is always based on the voltammetric method and is used where it is difficult to position the auxiliary earth current rod at a distance equal to 5 times the diagonal of the area of the ground system by reducing this distance to once the diagonal of the ground system (see Fig.
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Gx Series Ground resistivity measurement This test aims at analyzing the resistivity value of the ground in order to define the type of rods to be used when designing the installation. For the measurement of resistivity, there are no correct or incorrect values. The various values obtained using distances between increasing "d"...
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Gx Series Approximate evaluation of intentional rods' contribution The resistance of an Rd rod can be calculated with the following formulas ( r = average resistivity of the ground). a) resistance of a vertical rod Rd = / L where L = length of the element touching the ground b) resistance of a horizontal rod Rd = 2 ...
Gx Series 13.14. VOLTAGE AND CURRENT HARMONICS Any periodical non-sine wave can be represented as a sum of sinusoidal waves having each a frequency that corresponds to an entire multiple of the fundamental, according to the relation: ...
Gx Series Odd harmonics Even harmonics Not multiple of 3 Multiple of 3 Relative voltage % Order h Relative voltage Relative voltage Order h Order h % Max % Max 6..24 Table 10 Limits for the harmonic voltages the supplier may introduce into the network These limits, theoretically applicable only for the supplier of electric energy, provide however a series of reference values within which the harmonics introduced into the network by the users must be contained.
Gx Series 13.14.2. Presence of harmonics: consequences In general, even harmonics, i.e. the 2 etc., do not cause problems. Triple harmonics, odd multiples of three, are added on the neutral (instead of cancelling each other) thus creating a condition of overheating of the wire which is extremely dangerous. Designers should take into consideration the three issues given below when designing a power distribution system that will contain harmonic current: ...
Gx Series 13.15. CALCULATION OF POWERS AND POWER FACTORS Single phase mode The instrument measures the values of RMS Voltage and RMS Current and calculates the average Power values for each period. The formulas for power calculation are: ...
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