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Related Manuals for Nieaf-Smitt ELT-S
Summary of Contents for Nieaf-Smitt ELT-S
- Page 1 User manual Earth Line / Loop Impedance tester Supplier: Nieaf-Smitt bv Vrieslantlaan 6 3526 AA Utrecht Holland P.O. box 7023 3502 KA Utrecht ELT-S Specifications of the equipment: Specifications of the user manual: Date: 17-11-2004 Number: 561144038 Ref. :004...
- Page 2 Preface This manual describes the earth line / loop impedance tester. The information in this manual is important for proper and safe functioning of the machine. In case you are not familiar with the operation, the preventive maintenance, etc. of the earth line / loop impedance tester, then you read this user manual from the beginning to the end thoroughly.
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Page 3: Warranty
Nieaf-Smitt bv. Nieaf-Smitt bv reserves the right to change parts at any given moment, without prior or direct notification to the client. The contents of this user manual may also be changed without prior warning. - Page 4 Warning pictograms on the tester There are a number of pictograms on the tester, meant to warn the user of remaining risks that may be present in spite of the safe design. Table 1: Pictograms on the tester Pictogram Description Location on the tester Warning: At the back side of the tester on the instruction...
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Page 5: Table Of Contents
CONTENTS 1. GENERAL SAFETY REGULATIONS ........................7 2. INTRODUCTION ..............................8 2.1 GENERAL ................................ 8 2.1.1 The intended use............................8 2.1.2 Target group ............................8 2.1.3 Working principle............................ 9 2.2 SPECIFICATIONS ............................10 2.3 CERTIFICATION ............................12 3. TESTER COMPOSITION ............................ 13 3.1 GENERAL .............................. - Page 6 Tables: Table 1: Pictograms on the tester Table 2: Switches Table 3: Sub results and parameters Table 4: General faults and display messages Figures: Figure 1: Practical installation Figure 2: Operating Figure 3: Identification number of each function Figure 4: RS232 connector Figure 5: RS232 cable Figure 6: An example of print out Figure 7: Batteries inserted...
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Page 7: General Safety Regulations
Read, before you perform any action in connection with the tester, this user manual carefully. Nieaf-Smitt bv is not liable for injuries, (financial) damage and/or excessive wear resulting from incorrectly performed maintenance, incorrect use of or modifications to the instrument. -
Page 8: Introduction
- have got a certain level of technical knowledge gained by education/training and who; - are familiar with the applied technology in the instrument and are aware of the possible dangers and risks. Repair can only be done by Nieaf-Smitt bv. By operating we mean: - setting up the instrument and executing tests;... -
Page 9: Working Principle
2.1.3 Working principle Structure The ELT-S is a professional instrument intended for execution of line (L-N or L-L) as well as loop (L- PE) impedance measurements on one or three phase systems. Using this instrument one can test also loop resistance between neutral and protective conductors without causing trip out RCCB. Select the test by means of the rotary switch. -
Page 10: Specifications
2.2 SPECIFICATIONS General Nominal voltage Z LINE 100 - 440 V ac (eff) Nominal voltage Z LOOP 100 - 250 V Nominal frequency 45 - 65 Hz Power supply 4 x 1,5 V IEC LR14 alkaline batteries Battery life time approx. - Page 11 Loop impedance measurement between the phase and protective conductors 0 - 19,99 Ω / 20,0 - 199,9 Ω / 200 - 1999 Ω Range (automatic selection) 0,01 Ω / 0,1 Ω / 1 Ω Resolution Accuracy ± (2% reading + 2 digits) Nominal voltage 100 - 250 V ac (Fe)
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Page 12: Certification
Prospective short-circuit current (I ) standard value (resistance) Short-circuit current I calculation: δ ⋅ + LOOP − (230V factory set-up) δ (6% factory set-up) Accuracy of I : take into account the accuracy of Z LOOP display range (230 V): 0,11 A - 23 kA Resolution I 0.01 A .. -
Page 13: Tester Composition
3.1 GENERAL The ELT-S is built in an enclosure of solid ABS plastic. The display is situated at the front side of the tester. The test results are displayed. The main parts (see figures in Chapter 5) are listed below: Front: 1. -
Page 14: Line Or Fault Loop Impedance And Prospective Short-Circuit Current Measurement
3.2.3 Line or fault loop impedance and prospective short-circuit current measurement Why to test line or fault loop impedance and prospective short-circuit current? - to verify correspondence fused fuses (nominal current and breaking current capacity); - to dimension the protection system; - to verify the capability of the power source;... -
Page 15: Installation; Starting Up And Adjustment
3. Insert the batteries in the instrument. 4. Connect the test object according to the circuit diagrams with the ELT-S. 5. Carry out the selected test. Find a place to put the manual such that it is within reach during the use of the instrument. -
Page 16: How To Use The Tester
5. HOW TO USE THE TESTER? 5.1 OPERATION Utrecht - Page 16 - Ref 004... -
Page 17: Operating
Keys Function key description. Table 2: Switches Selector position Description ON/OFF - to switch on/off the tester; the tester will switch off automatically after it hasn’t been used for ten minutes or more; Recall result - to recall the saved results; Save result - to save the displayed measuring results;... -
Page 18: Test Selection
1. Check the instrument on visible damages and/or defects, for example the power plug, the line cord etc..Don’t carry out any test with a damaged or broken instrument. Provide skilled reparation first 2. Do not connect the test object as well as the test cords with the tester. 3. -
Page 19: Test 2: Line Or Fault Loop Impedance And Prospect. Short-Circuit Current Measurement
- If the mains voltage is displayed the difference is <25V. The measurement can be performed. - If the message PEd is displayed the difference is >25V. Disconnect the ELT-S and check the socket. 5. The present mains voltage is displayed. -
Page 20: Test 3: Loop Resistance Measurement
5.2.3 Test 3: Loop resistance measurement - The DC test current is pushed into PE - N loop using instrument's battery. In order to reach better results both polarities (positive and negative) are used during the test. - There must be no voltage between the N and the PE terminals otherwise the instrument will not carry out the measurement but present voltage will be displayed flashing way. - Page 21 Each displayed result can be stored as follows: Pressed key Comments The last changed partial code (X.X.X. of YYY) which is used for the memorising of the results will, if necessary, be saved in the order of changing. Insert new codes using the [↑, ↓] keys if necessary. Check the other part of the code pressing the [DISPLAY] key and change it using the [↑, ↓] keys if necessary.
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Page 22: Recalling Of Memorised Results
Utrecht - Page 22 - Ref 004... -
Page 23: Rs232 Communication
First the identification number of a function is displayed for a while and then the main result will be displayed. Check the other results saved under the same object and measuring place code by using the [↑, ↓] keys. Form of the memory locations under a certain code X.X.X, YYY: Result 1 + sub result;... - Page 24 Utrecht - Page 24 - Ref 004...
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Page 25: Erasing Of Results
5.6 ERASING OF RESULTS In order to avoid confusion, it is advisable to erase all stored results before starting new family of measurements. Sometimes only results stored under a certain object number or measuring place of the object are to be erased, or even only a recalled result has to be erased To prevent confusion it is important to follow the erasing procedure correctly. - Page 26 Only results of a certain measuring place (X.X.X) of the object are to be erased. The rotary switch in any position but the RS232 position. Comments Pressed key The last changed partial code (X.X.X of YYY), used for the recalling of the results, is displayed.
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Page 27: Reset Of The Instrument
5.7 RESET OF THE INSTRUMENT After inserting the batteries or if there is a malfunction noticed, it is advisable to reset the instrument. How to reset? 1. Switch off the instrument. 2. Press the [Clear memory] key and keep it pressed while you’re switching on the instrument. is displayed for a while meaning the reset function has been effected. -
Page 28: Troubleshooting
5.8 TROUBLESHOOTING Table 5 describes the different displayed fault messages of the tester. For each fault an explanation and cause is given. Faults, which demand technical qualified persons, are marked with a star (*). When executing various tests, various warnings could be displayed. They are having the following meanings: Table. -
Page 29: Calibration And Repair
It’s to be shown that the tested products are governed by an established test procedure. The calibration will be executed by Nieaf-Smitt b.v..In the calibration report the results, judgements, town, date and name of the reponsible person will be mentioned. There are no user replaceable parts in the... -
Page 30: Maintenance
6. MAINTENANCE Don’t replace parts yourself but call technical qualified persons (see paragraph 2.1.2). 6.1 BATTERIES REPLACEMENT Exchange all four batteries. If there are memorised results in the instrument and the “BAT” mark appears then transfer them to an extern printer or PC first. batteries have to be changed within one minute! Disconnect all cables (test cable or RS232 cable) before removing the battery cover. -
Page 31: Cleaning
Use the batteries declared in technical specification only. If there is no chance to transfer the results (extern printer or PC not available), then follow the next procedure when changing batteries in order not to loose any stored data: 1. Switch off the instrument. 2. -
Page 32: Accessory And Replaceable Parts
7. ACCESSORY AND REPLACEABLE PARTS Supplied standard set: - one test main cable shuko, curly type, 2 m; - one English user manual. Check all the supplied items (enclosure of the instrument as well as the accessories). If there are any damages please return the tester to the supplier for exchange or service. -
Page 33: Eu Declaration Of Conformity
Identification of the instrument: Trademark: Nieaf-Smitt bv. Model/Type: ELT-S Nieaf-Smitt herewith declare that the instrument which this declaration refers to is in conformity with the following standards and according to the conditions of following Directives: Low Voltage Directive (73/23/EEG) as last amended. EMC-Directive (89/336/EEG) as last amended. -
Page 34: Circuit Diagrams
Attachment 2 Circuit diagrams Three phase rotation test Connect the instrument to the test object or installation according to the circuit diagram Utrecht - Page 34 - Ref 004... - Page 35 Line impedance and prospective short-circuit current measurement Connect the instrument to the test object or installation according to the circuit diagram L / L 1 N / L 2 P E / L 3 Recall Clear Memory Result Save Result Utrecht - Page 35 - Ref 004...
- Page 36 - Fault loop impedance and prospective short-circuit current measurement Connect the instrument to the test object or installation according to the circuit diagram Phase Rotation Mains Impedance (Z ) Loop Resistance (R ) Loop Resistance (R ) (I < 15 mA) Send Send Data (RS232) Clear...
- Page 37 Loop resistance measurement without causing trip out RCCB Connect the instrument to the test object or installation according to the circuit diagram Utrecht - Page 37 - Ref 004...
- Page 38 Loop resistance measurement without causing trip out RCCB (using separate test cords) Connect the instrument to the test object or installation according to the circuit diagram L/L1 RCCB Mains Impedance N/L2 PE/L3 Send Data (RS232) Recall Clear Result Memory Save Result Opmerking [WvR1]: Coreldra w tekening “elt bijlage 5/5 engels”...
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