Fluke 1625Earth/Ground Uživatelský manuál

® 1625 Earth/Ground Tester Users Manual January 2006 © 2006 Fluke Corporation, All rights reserved. Printed in USA All product names are trade

1625 Users Manual 2 Notes • The terms earth and earthing also refer to ground and grounding and is used interchangeably throughout this manual. • Fo

Earth/Ground Tester Models and Accessories 3 Models and Accessories Table 1 lists the models and accessories. Table 1. Models and Accessories D

1625 Users Manual 4 Safety Instructions W Warning This measuring equipment is only to be operated by quali-fied staff and in accord with its technical

Earth/Ground Tester Setup 5 Qualified Staff Consists of persons familiar with the setting up, assembly, starting up and op-eration of the produ

1625 Users Manual 6 General Microprocessor controlled universal earth resistance meter with fully auto-mated measuring frequency selection process as

Earth/Ground Tester Assembly 7 Assembly The instrument is made up of two parts: 1. The base part which contains the measuring electronics. 2.

1625 Users Manual 8 EXTHSESESwitchingVoltagemeasurementCurrentmeasurementSourceUndervoltagedetectionSupplyvoltageADCCompProcessorLCDdriverDisplayRelai

Earth/Ground Tester Description of Functions 9 Measurement of Earthing Resistance (RE) The earthing resistance is determined by a 3- or 4-pol

1625 Users Manual 10 LO-BAT Supervision of the battery charge status is done with a comparator circuit. Via microprocessor, a drop in battery capacity

Earth/Ground Tester Specifications 11 Operation: Central rotary switch and function keys Working temperature range: -10 °C … +50 °C Operat

LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and

1625 Users Manual 12 Max voltage: Wsocket A to socket EFGH Urms = 0 V Sockets ” E ES S H " to each other in any com-bination, max.

Earth/Ground Tester Specifications 13 Measurement of Interference Voltage DC + AC (UST) Measuring method: fullwave rectification Measuring Ran

1625 Users Manual 14 Table 2. Electrical Measurement Specifications Intrinsic Er-ror or Influ-ence Quan-tity Reference Con-ditions or Speci-fied Opera

Earth/Ground Tester Specifications 15 A = intrinsic error En = variations R = routine test T = type test []100% x valuefiducialB%B

1625 Users Manual 16 fluencing conditions (see diagramm), the display shows a warning symbol W and a notice that RS or RH are too high. %0001F %001

Earth/Ground Tester Specifications 17 Selective Measurement of the Earthing Resistance (REA) Measuring method: Current and voltage measurement

1625 Users Manual 18 Minimal current in single branch to be measured: 0.5 mA with transformer (1000:1) 0.1 mA with transformer (200:1) Max. interf

Earth/Ground Tester Specifications 19 Resistance Measurement (RF) Measuring method: current- voltage measurement as per IEC61557-4 possible Op

1625 Users Manual 20 Compensation of Lead Resistance (RK) Compensation of lead resistance (RK) can be switched on in functions RE 3pole, RE 4pole A,

Earth/Ground Tester Description of the Operating Elements 21 Description of the Operating Elements Figure 4 illustrates the operating element

i Table of Contents Title Page Introduction ... 1 Models a

1625 Users Manual 22 D "CHANGE ITEM" button to change the set point entry values. E "SELECT" button to select the digit to be ch

Earth/Ground Tester Description of the Operating Elements 23 Description of Display Elements The display (Figure 5) is divided into four disp

1625 Users Manual 24 R ~ AC- resistance R* Earthing impedance (measuring frequency 55 Hz) AFC Automatic-frequency-control TEST Measuring sequence

Earth/Ground Tester Procedure of Measurements 25 POWER ON Functions During switching on of the instrument with the central rotary switch it is

1625 Users Manual 26 e) Activation of display illumination By keeping the "CHANGE ITEM" button pressed during the switch on se-quence the d

Earth/Ground Tester Procedure of Measurements 27 CONTROL LOOPMEASURING LOOPON/OFFPOWER ONFunctionSELECT MEASURINGFUNTION WITHCENTRAL ROTARYSWIT

1625 Users Manual 28 Control Loop After turning the function rotary switch, the voltage display mode is reached. Pushing "DISPLAY MENU" now

Earth/Ground Tester Procedure of Measurements 29 A UM 48 V/20 V selectable to 20 V with CODE and RK 0.000 Ω ... 29.99 Ω in position RE 3pol

1625 Users Manual 30 Measuring Loop This loop is entered by pressing the "START TEST" button. After releasing "START TEST" the las

Earth/Ground Tester Procedure of Measurements 31 Safety Control Measurements Before each measurement the instrument automatically checks the me

1625 Users Manual ii Measurement of Interference - Voltages and Frequencies... 31 Measurement of Earthing Resistances...

1625 Users Manual 32 RRAREarth/Ground Resistance 300 kAC Resistance 300 k DC Low Resistance 3kCHANGEITEMSELECT STARTTESTDI

Earth/Ground Tester Procedure of Measurements 33 To keep the instrument as simple as possible at the time of delivery, all special functions, s

1625 Users Manual 34 RRAREarth/Ground Resistance 300 kAC Resistance 300 k DC Low Resistance 3kCHANGEITEMSELECT STARTTESTDI

Earth/Ground Tester Procedure of Measurements 35 An accuracy test of the results is made with another measurement following repositioning of th

1625 Users Manual 36 Measurement of Single Earth Electrode Resistances in Mesh Operated Earthing Systems Using Selective Clamp Method This measuring m

Earth/Ground Tester Procedure of Measurements 37 Errors of the current transformer can be corrected as described in “Correcting Clip-on Transfo

1625 Users Manual 38 Note The ratio that is preset from factory is correct for the EI162X sensing clamp Press "START TEST" button. Now a fu

Earth/Ground Tester Procedure of Measurements 39 reliable values, the instrument offers the possibility of averaging over a longer period. 1.

1625 Users Manual 40 Accordingly, these equivalent resistances are displayed as: liURmeasEi= Therefore the earthing resistance RE of the pylon is dete

Earth/Ground Tester Procedure of Measurements 41 3. Press “START TEST” button Now a fully automated test sequence of all relevant parameters

iii List of Tables Table Title Page 1. Models and Accessories... 3 2. Electrical Measurement Speci

1625 Users Manual 42 Time average measurement: If there is a warning "measured value unstable" (see "Description of displays", Pro

Earth/Ground Tester Procedure of Measurements 43 RRAREarth/Ground Resistance 300kAC Resistance 300 k DC Low Resist

1625 Users Manual 44 Example: Your clip-on transformer has a transformation ratio of tr = 1000:1. The meas-urement without clip-on transformer results

Earth/Ground Tester Procedure of Measurements 45 3. Call display RK with "DISPLAY MENU" button. 4. Implement compensation with &quo

1625 Users Manual 46 1. Four earth spikes of the same length are positioned into the soil in an even line and with the same distance "a" to

Earth/Ground Tester Procedure of Measurements 47 Distances of ProbeSoil restivityEA123 edw021.eps Curve 1: As ρE decreases only deeper down, a

1625 Users Manual 48 HSEES90OI edw022.eps Measurement of Resistances Resistance Measurement (R~) This measuring function determines the ohmic resist

Earth/Ground Tester Procedure of Measurements 49 2. Connect instrument according to picture. 3. In this mode, all settings and LIMIT values a

1625 Users Manual 50 W Warning Due to the high measuring current inductive loads can cause lethal induced voltages during disconnection from the measu

Earth/Ground Tester Procedure of Measurements 51 Turning the central rotary switch for a short moment deletes the line compensation again. RRAR

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1625 Users Manual 52 Function Parameter Setting range Standard presetting FM (AFC/94/105/111/128) Hz AFC RE 3pole UM 48 V/20 V 48V RK 0.000 Ω

Earth/Ground Tester Procedure of Measurements 53 R F 2pole RK 0.000 Ω ... 29.99 Ω 0.000 Ω and LIMIT On/Off Off 4pole R LIMIT 0.000 Ω

1625 Users Manual 54 6. The changed value is stored by pressing the "DISPLAY MENU" key. 7. Pressing the "START TEST" key exits t

Earth/Ground Tester Description of Displays 55 Description of Displays Table 3. Description of Displays Function Displays Condition Note Bef

1625 Users Manual 56 Function Displays Condition Note STLIMITV edw031.eps Dangerous AC - vol-tage > 50 V Apart from voltage measure-ment all mea

Earth/Ground Tester Description of Displays 57 Function Displays Condition Note STV edw037.eps Measuring circuit of earth- and auxil. earth

1625 Users Manual 58 Function Displays Condition Note ELIMIT edw041.eps Display of measured value ex-ceeds LIMIT. Measured value is higher than set

Earth/Ground Tester Description of Displays 59 Function Displays Condition Note No reactions to button control etc. edw046.eps Opera

1625 Users Manual 60 Function Displays Condition Note edw050.eps EE PROM memory access mal-function. contact service. edw051.eps Internal comput

Earth/Ground Tester Care and Maintenance 61 detergent or spirit. Avoid aggressive cleaning agents and solvents (trilene, chlorothene etc.). S

v List of Figures Figure Title Page 1. Fluke 1625 Earth/Ground Tester... 2 2. Description of Functions ...

1625 Users Manual 62 Recalibration This instrument exceeds the prescribed accuracies by multiples as it leaves the factory. To maintain it in this st

Stakeless Earth/Ground Resistance Testing Care and Maintenance 63 Appendix A Stakeless Earth/Ground Resistance Testing Introduction Stakeless

1625 Users Manual 64 edw060.eps Specifications General: Adapter unit for use with ground testers in the mode: RE D 3 pole (Order No. EI-1625) All in

Stakeless Earth/Ground Resistance Testing Principle of Operation 65 Dimensions Total length of adaptercable 1,8 m, Length of shielded cable to

1625 Users Manual 66 URXR1R2R3Rn-1RnACSourceEquivalent diagram edw061.eps RRRRnXIU111121+⋅⋅⋅⋅+++=

Stakeless Earth/Ground Resistance Testing Principle of Operation 67 If the parallel connection of resistors, R1...Rn is considerably lower than

1625 Users Manual 68 Operation Connect the adapter according to the diagram and the designations E, S and H (C1, P1 and P2 for US-version) to the test

Stakeless Earth/Ground Resistance Testing Principle of Operation 69 >10 cmErder edw064.eps Pushing the START-button will display the value o

1625 Users Manual 70 Applications Example1: Ground rod on power poles. edw065.eps Example 2: Tests on multi-grounded (inter-connected) systems: Groun

Stakeless Earth/Ground Resistance Testing Principle of Operation 71 MLightningProtectionFooting groundFramework edw066.eps

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1625 Users Manual 72 Description of Displays With stakeless ground testing some display combinations have certain signifi-cance. E edw067.eps Polarity

Stakeless Earth/Ground Resistance Testing Principle of Operation 73 Display Significance Note STVedw069.eps Resistance under test is above mea

74 Appendix B Earthing ResistanceIntroduction Per definition, the earthing resistance consists of several individual resistances. 1. The resistan

Earthing Resistance Principle of Operation 75 Earthing Resistance (Ω) Type of Soil Soil Re-sitivity [ρE] Earthing Rod m Depth Earthing Strip m

1625 Users Manual 76 Soil Resistivity ρE The soil resistivity is the resistance measured between two opposing surfaces of a cube of homogenous soil ma

Earthing Resistance Principle of Operation 77 monthDec.012345687 9 10 11 120481216202428Earth resistance REJulyJan. edw055.eps Temporal change

1625 Users Manual 78 Measuring Method The current voltage measuring method is based on the block diagram circuit shown in the figure below. U meas.VG

Earthing Resistance Principle of Operation 79 The Potential Gradient Area Around every earth electrode a so called potential gradient area deve

1625 Users Manual 80 The Influence of Potential Gradient Areas on Earth Resis-tance Measurement To pick off the true voltage drop from the earthing re

Earthing Resistance Principle of Operation 81 Earth Impedance (R*) on High Voltage Transmission Lines The earthings of transmission line pylon

1 Earth/Ground Tester Introduction At locations involving the generation, distribution and consumption of electri-cal energy, certain safety measu

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