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Summary of Contents for METREL A 1281
- Page 1 Multi range AC current clamps (1000A / 100A / 5A / 0.5A) A 1281 Instruction manual Version 2.1, Code no. 20 751 696...
- Page 2 Mark on your equipment certifies that this equipment meets the requirements of the EU (European Union) concerning safety and electromagnetic compatibility regulations. No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL.
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Page 3: Table Of Contents
A 1281 Multi range AC current clamps Table of contents DESCRIPTION OF CURRENT CLAMPS ................ 5 CURRENT CLAMPS OPERATION ................. 6 ....................6 PERATION NSTRUCTIONS ............. 7 UBSTITUTE LECTRIC ODEL FOR URRENT LAMPS TYPICAL APPLICATIONS ....................7 ..................7 OWER... - Page 4 A 1281 Multi range AC current clamps Symbols and Warnings To ensure a high level of operator's safety during using of A 1281 Multi range AC current clamps the following warnings has to be considered: Do not use the current clamp if any damage is noticed! ...
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Page 5: Description Of Current Clamps
Multi range AC current clamps Description of current clamps The A 1281 multi range current clamps are designed for measuring alternating currents on low and medium power installations: 50 mA ÷ 1000 A. They have electronic module, and can be connected only to Metrel Power Quality Analysers’, series: ... -
Page 6: Current Clamps Operation
Figure 2: Current clamps A 1281 - connection to the measuring instrument Step 1 Connect A 1281 current clamps output connector to the appropriate (Metrel Power Quality Analyzer) measuring instrument’s current input terminal. (See figure 2) Do not connect clamp output elsewhere than to Metrel Power Quality Analyzers’... -
Page 7: Substitute Electric Model For Current Clamps
(V/A) 0,01 1000 0,001 Typical applications Power Quality Measurement A 1281 current clamps have linear response through wide frequency bandwidth (see Figure 8). Therefore, they are well suited for: Power Quality auditing, EN 50160 or troubleshooting. Particularly for: ... -
Page 8: Power Measurement
A 1281 Multi range AC current clamps Power Measurement A 1281 current clamps have small phase shift (see Figure 7 and Figure 9) over wide frequency range. Therefore, they are well suited for: Power and energy measurements (active, reactive, apparent) ... -
Page 9: Determining Problems In Lighting And Grounding Systems
If the neutral and PE wiring are connected together anywhere in the installation this can result in an improper current distribution through the neutral and PE conductors. Note Metrel Application note: Measuring of leakage current contain many practical aspects and examples of leakage current measurement. Maintenance... -
Page 10: Technical Specifications
A 1281 Multi range AC current clamps Technical Specifications General Safety specification Mechanical data Over voltage category: 600 V CAT III, Jaw opening: 52 mm Pollution degree: 2 Double insulation Environment conditions Maximum conductor sizes: C ÷ 55 Working temperature: -20 Cable: <... -
Page 11: Accuracy And Phase Error
A 1281 Multi range AC current clamps Accuracy and Phase Error Reference conditions: C 1 Current range Temperature: 23 Humidity: 60 % Nominal current (I 0.5 A 100 A 1000 A Current ratio 0.5 A/V 5 A/V 100 A/V... -
Page 12: Electromagnetic Compatibility (Emc)
Figure 9: Phase error vs. frequency (for 5A range) Figure 8: Accuracy vs. frequency (for 5A range) Electromagnetic Compatibility (EMC) Current clamps A 1281 conforms to the directive 2004/108/EC for EMC, as defined by EN-61326-1: Emission: Class B (domestic and industrial use).
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