Related Manuals for METREL RCD MI 2120
Summary of Contents for METREL RCD MI 2120
- Page 1 Machine Translated by Google RCD Loop Resistance and System Resistance Tester MI 2120 User Manual Version: 2.0, Code-Nr. 20 750 953...
- Page 2 The CE marking on your device confirms that this device complies with the EU directives regarding safety and electromagnetic compatibility. © 2000 Metrel No part of this publication may be reproduced or utilized in any form or by any means without the written permission of METREL.
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Page 3: Table Of Contents
Machine Translated by Google MI 2120 Contents 1. Introduction........................4 1.1. Features ........................4 1.2. Applied standards and regulations ..................4 2. Device description....................5 2.1. Housing........................5 2.2. User interface........................5 2.3. Connections......................6 2.4. Bottom of the device....................7 2.5. Accessories........................7 3. Warnings and messages from the test device ............8 3.1. Warnings ........................8 3.2. -
Page 4: Introduction
Machine Translated by Google MI 2120 introduction 1. Introduction 1.1. Features The SMARTEC RCD loop and internal network resistance tester is designed for mobile use, with battery supply and stable for everyday use. It tests the electrical safety of the supply network including the residual current devices (RCDs) installed in it. -
Page 5: Device Description
Machine Translated by Google MI 2120 Device description 2. Device description 2.1. Housing The measuring device is located in a P plastic housing. The protection class is specified in the technical data. The operating area with display and control buttons is protected by a movable cover. Attention! The protective cover is not removable. -
Page 6: Connections
Machine Translated by Google MI 2120 Device description Explanation: customized LCD display. IÿN / up Double function: increase of the nominal fault current and the memory group 3 START button for each measurement 4 DISP / Ulim Triple function: display of secondary results, display of the selected function, selection of the contact voltage limit (25 V or 50 V). -
Page 7: Bottom Of The Device
2.5. Accessories The test device comes with a wide range of standard accessories and some options that can be purchased separately. You can obtain a list of standard accessories and currently available options from your Metrel sales partner at any time. -
Page 8: Warnings And Messages From The Test Device
• Observe all rules and regulations when dealing with electrical installations to protect yourself from injury or electric shock! • Use only original accessories from your Metrel distributor. • A voltage existing between N and PE can influence the measurement. -
Page 9: Messages
Machine Translated by Google MI 2120 Warnings and messages from the test device 3.2. Display messages The display gives the operator a whole series of information in addition to the measurement results. It is important to interpret these correctly. Numerical result Battery low Physical unit of the Larger than... -
Page 10: Measurements
Machine Translated by Google MI 2120 Measurements 4. Measurements 4.1. RCD functions The following two graphics show the test setup for carrying out the RCD measurements such as contact voltage, tripping time and tripping current, the measurement of loop resistance (RL-PE), internal network resistance (RL- N), in Figure 5 using the “test cable with Schuko plug”, in Figure 6 using the universal test cable. -
Page 11: Voltage
Machine Translated by Google MI 2120 Measurements 4.1.1. Contact voltage Small leakage currents flowing to the PE create a voltage drop across the earthing resistance, which is known as the touch voltage. This voltage is present in all conductive parts connected to PE and must be lower than the safety limit, eg 50V in domestic areas. - Page 12 Machine Translated by Google MI 2120 Measurements Brand! • The specified voltage range for the input voltage is 100 to 264 V. The symbol ! and the preset voltage UL-PE appear after pressing the START button if the voltage is lower than 100 V or higher than 264 V.
- Page 13 Machine Translated by Google MI 2120 Measurements Brand! • The specified voltage range for the input voltage is 100 to 264 V. The symbol ! and the preset voltage UL-PE appear after pressing the START button if the voltage is lower than 100 V or higher than 264 V.
- Page 14 Machine Translated by Google MI 2120 Measurements Important: • Double-clicking the START button changes the polarity of the start phase. More explanations later. • Read the result (tripping time of the RCD). See the following image. • Recall the secondary results: contact voltage (at rated residual current of the standard RCD or twice the rated residual current for selective RCD) by pressing the DISP/Ulim button once or maximum contact voltage (default) by pressing the DISP/Ulim button twice.
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Page 15: Tripping Current (Ramp
Machine Translated by Google MI 2120 Measurements • A current from a defective consumer into the PE can significantly distort the result. Therefore, remove all consumers from the circuit before measuring! • It is recommended to perform all three tests at the RCD tripping time to verify the full functionality of the RCD. -
Page 16: Schleifenwiderstand Rl-Pe, Netzinnenwiderstand Rl-N
Machine Translated by Google MI 2120 Measurements The contact voltage is calculated from the measured tripping current and Addition of a security surcharge of 5% is displayed. Brand! • The specified voltage range for the input voltage is 100 to 264 V. The symbol ! and the preset voltage UL-PE appear after pressing the START button if the voltage is lower than 100 V or higher than 264 V. - Page 17 Machine Translated by Google MI 2120 Measurements Expected short-circuit current Resistance result Figure 12. Example results Brand! • The specified voltage range for the input voltage is 100 to 264 V. The symbol ! and the preset voltage UL- PE appear after pressing the START button if the voltage is lower than 100 V or higher than 264 V. • The specified accuracy assumes a stable mains voltage for the entire Measuring process ahead!
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Page 18: Storage Of Measurement Results
Machine Translated by Google MI 2120 Treatment of measurement results 5. Treatment of measurement results 5.1. Storage of measurement results The storage of measurement results is organized in groups in which measurement series are stacked. The operator can define up to 1999 groups. Each group contains a stack of measurement results, whereby the measurement result also includes all of its secondary results. - Page 19 Machine Translated by Google MI 2120 Treatment of measurement results Number of the offered group Once saved - no Possibility to save the result a second time Figure 14. Group address and display in case of (accidental) Double storage Brand! - Press the START button or turn the rotary switch to exit the memory menu - Each measurement result can only be saved once...
- Page 20 Machine Translated by Google MI 2120 Treatment of measurement results Code of the stored measurement function (Rotary switch position 7 = RLINE, Netzinnenwiderstand RL-N) Saved measurement result Side effect of expected Short circuit current (RLINE) Figure 15. Information on the display during a memory recall Storage –...
- Page 21 Machine Translated by Google MI 2120 Treatment of measurement results Stored values Depending on the type of test, a number of secondary results or parameters are also stored. function Function t/ Parameter Stored data Function code Function code IÿN×5 Schleifenwiderstand Trigger time Contact voltage Contact voltage...
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Page 22: Data Transfer
Machine Translated by Google MI 2120 Treatment of measurement results 5.3. Data transfer Stored values can be transferred to a PC. Special software that runs on a PC can identify the device and retrieve all data from the memory into the PC. Data transfer procedure: •... -
Page 23: Maintenance
Machine Translated by Google MI 2120 maintenance 6. Maintenance 6.1. Inspection To ensure the safety of the user, it should be a regular and good habit to inspect the device. Check the device for damage, as well as the accessories! If damage is visible, secure the device against use and have it repaired in a specialist workshop, typically at the manufacturer or distributor. -
Page 24: Cleaning
Machine Translated by Google MI 2120 maintenance A set of new alkaline batteries powers the device for approximately 150 hours. Rechargeable NiCd or NiMH batteries can be used. The measuring device has a connection for an external charger. The batteries are recharged when installed. Brand! •... -
Page 25: Specifications
Machine Translated by Google MI 2120 Specifications 7. Specifications 7.1. Measurements RCD – General data Adjustable nominal residual current of the RCD: 10, 30, 100, 300, 500, 1000 mA 0 bis +0.1Iÿ; Iÿ = IÿN, 5×IÿN Accuracy of differential test current: -0.1IÿN to 0;... - Page 26 Machine Translated by Google MI 2120 Specifications RL = Uc / IÿN Calculation: Test current: < 0.5×IÿN RCD – loop resistance RL-PE (RCD does not trip) Measuring range RL (0.2 ÷ 10 k)ÿ Display range RL (ÿ) Resolution accuracy 0.00 ÷ (ÿ) 0.01 19.99 20.0 ÷...
- Page 27 Machine Translated by Google MI 2120 Specifications The voltage Uci is calculated to measure the tripping current Iÿ. Loop resistance RL-PE and expected short-circuit current Measuring range RLOOP (0.2 ÷ 1999)ÿ accuracy Display range ZL-PE (ÿ) Resolution (ÿ) 0.00 ÷ 19.99 0.01 20.0 ÷...
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Page 28: General Specifications
Machine Translated by Google MI 2120 Specifications Spanning UL-PE Accuracy Display range U (V) Resolution (V) 0 ÷ 440 ±(3% of reading + 3V) DC, 45 – 65 Hz Nominal frequency range: Voltage UL-N Accuracy Display range U (V) Resolution (V) 0 ÷ 440 ±(3% of reading + 3V) DC, 45 –...
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