Page 1: ...Users Manual KMP7030 Loop Impedance Tester ...
Page 2: ......
Page 3: ...KMP7030 Loop Impedance Tester Users Manual June 2011 Rev 1 2011 Amprobe Test Tools All rights reserved Printed in China English ...
Page 4: ... be remitted in the form of a check a money order credit card with expiration date or a purchase order made payable to Amprobe Test Tools In Warranty Repairs and Replacement All Countries Please read the warranty statement and check your battery before requesting repair During the warranty period any defective test tool can be returned to your Amprobe Test Tools distributor for an exchange for the...
Page 5: ...urement Short circuit current measurement ON OFF Button Display Backlight Button 6 7 8 Non Trip test on passive RCDs Automatic measurement reading lock except for measurement range LOOP 2000Ω TEST Button Starts the selected test Display Measuring terminal KMP7030 Loop Impedance Tester 4 5 9 10 10 ...
Page 6: ...5 Fault voltage Protect earth voltage higher than 50V 6 Battery status indicator 7 Measuring 8 Calibration mode 9 Hazardous voltage 10 Non Trip test on passive RCDs 11 Voltage 12 Loop impedance 13 Prospective short circuit current 14 Correct line and earth wire connection 15 Correct neutral and earth wire connection 16 Warning Incorrect connection for line and neutral Reverse the connection ...
Page 7: ...ES 4 MAKING MEASUREMENT 5 Measuring Volts and Frequency 5 Measuring Loop Impedance 6 Measuring loop impedance NO TRIP mode 6 Measuring for Line Resistance and Prospective Short circuit Current 7 Fault Loop Impedance and Fault Prospective Short Circuit Current 8 SPECIFICATION 13 MAINTENANCE AND REPAIR 14 BATTERY REPLACEMENT 15 ...
Page 8: ...personal injury follow these guidelines Use this product only as specified in this manual or the protection provided by the product might be impaired Do not use the product if it is damaged Before you use the product inspect the case Look for cracks or missing plastic Make sure the battery door is closed and latched before operating the product Remove power cord from the product before opening the...
Page 9: ...rdous live conductors are exposed Unpacking and Inspection Your shipping carton should include 1 Loop Impedance Tester 1 UK Test Cord set 1 Strap 1 Users Manual 1 Carrying case 8 1 5V AA alkaline batteries If any of the items are damaged or missing return the complete package to the place of purchase for an exchange PRODUCT DESCRIPTION Loop testing is a quick convenient and highly specific method ...
Page 10: ...61557 Measurement Range Operating Error Nominal Values LOOP EN 61557 3 LOOP NO TRIP 0 00Ω 20 0Ω 0 0Ω 200Ω 0 50Ω 19 99Ω 3 6LSD 10 0Ω 199 9Ω 3 6LSD Un 230VAC f 50Hz Ik 20kA LOOP HI CURRENT 0 00Ω 20 0Ω 0 0Ω 200Ω 0Ω 2000Ω 0 50Ω 19 99Ω 3 4LSD 10 0Ω 199 9Ω 3 4LSD 100Ω 1999Ω 3 4LSD Volts 100 300V 50 60Hz 100 300V 50 60Hz 2 4LSD Ambient Temperature 23 2 C Ambient Humidity 45 75 RH Additional operating unc...
Page 11: ...Power Supply Socket Outlet To measure voltage and frequency 1 Turn the rotary switch to the Impedance function 2 Connect the Tester to the mains socket outlet Check the signs for correct connections of L N and PE 3 The display shows the AC voltage and frequency Measuring Loop Impedance See Connection Diagram in Figure 1 Warning Make sure the power supply socket outlet s wiring is correct and the g...
Page 12: ...n select range for display resolution 2 Connect the Tester to the mains socket outlet The voltage of the circuit will appear on display Check the signs for correct connections of L N and PE 3 Press TEST button the measurement would take few seconds to 60 seconds 4 The display shows the measured loop impedance Measuring loop impedance NO TRIP mode To prevent tripping RCDs in the circuit Use the NO ...
Page 13: ... shall be higher than the calculated prospective short circuit current To measure Line Resistance and Prospective Short circuit Current PSC 1 Turn the rotary switch to the PSC function or LOOP select range for display resolution 2 Connect the Tester to the mains socket outlet The voltage of the circuit will appear on display Check the signs for correct connections of L N and PE 3 Press TEST button...
Page 14: ...e shall be measured Fault loop resistance shall be small so that overflow protective device or fuse can automatically cut off the circuit within specified time in the case of fault Inspect circuit s fault impedance in order to determine protective device s specified value in circuit is not exceeded TT system s fault impedance consists of the following parts Power transformer s secondary winding re...
Page 15: ...residual current l n when the protective device is the residual current equipment RCD For instance RCD protective device exists in TT system and its maximum RA value is I n Rated Residual Current I n 10 30 100 300 500 1000 mA RA 50V 5000 1667 500 167 100 50 Ω RA 25V 2500 833 250 83 50 25 Ω The fault impedance is measured by KMP7030 is slightly higher than RA value However if the circuit impedance ...
Page 16: ... RCD protective device effective and meet the safety requirements TN system s fault impedance consists of the following parts Power transformer s secondary winding resistance Phase line from power transformer to fault location Protective conductor resistance from fault location to power transformer Grounding resistance R Power transformer grounding system s resistance Ro ...
Page 17: ...e Uo is the rated voltage between phase and grounding la is the current that can enable the protective device to act within the time in the following table Uo V T S 120 0 8 230 0 4 400 0 2 400 0 1 For the distribution line no the tripping time exceeding five seconds is allowed la is the rated residual current I n when the protective device is the residual current device RCD ...
Page 18: ... 6 110 2 1 20 85 2 7 147 1 56 25 110 2 1 183 1 25 32 150 1 53 275 0 83 40 190 1 21 320 0 72 50 250 0 92 470 0 49 63 320 0 71 550 0 42 80 425 0 54 840 0 27 100 580 0 39 1020 0 22 The prospective fault current can also be measured by KMP7030 PSC function The prospective fault current must be higher than la The following is the example to test TN system s protection in accordance to the international...
Page 19: ... no is displayed on the display and no measurement can be made In this case disables NO TRIP function and make measurement Prospective Short Circuit Current Range Display Range Rated Test Current and Time Accuracy 200A 0 00 199 9A 2 3A 20ms 3 rdg 4LSD 2000A 0 0 1999A 25A 10ms 20kA 0 00 19 9kA 25A 10ms 200A NO TRIP 0 00 199 9A L N 20Ω 1 P N 25A 30ms N E 15mA approx 2s 3 rdg 6LSD 2000A NO TRIP 0 00 ...
Page 20: ... the operation of the meter the following steps should be performed in order to isolate the cause of the problem 1 Check the battery Replace the battery immediately when the symbol appears on the display 2 Review the operating instructions for possible mistakes in operating procedure Except for the replacement of the battery repair of the meter should be performed only by an Authorized Service Cen...
Page 21: ...to replace the batteries 1 Disconnect the power cord from mains socket outlet 2 Turn the OFF the Tester 3 Remove the screws from the battery cover and open the battery cover 4 Remove the batteries and replace with 8 new 1 5V Alkaline Batteries AA Pay attention to the polarity signs 5 Put the battery cover back and re fasten the screw ...
Page 22: ......
