Multi MCL-400IR Instruction Manual
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Multi MCL-400IR Instruction Manual

Digital ior leakage current clamp tester
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Ior DIGITAL LEAKAGE CLAMP TESTER
INSTRUCTION MANUAL
Thank you very much for selecting our model MCL-400IR
Ior Leakage Clamp Tester.
Before use the instrument, read this instruction manual
completely and familiarize yourself thoroughly with all
functions.
Keep this instruction manual carefully to take out
whenever you need.
MULTI MEASURING INSTRUMENTS CO.,LTD.
Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo, Japan, 101-0025
TEL : +81-3-3251-7013 FAX : +81-3-3253-4278
Home Page :
E-mail :
multi@multimic.com
MCL-400IR
http://www.mutimic.com/

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Summary of Contents for Multi MCL-400IR

  • Page 1 Ior DIGITAL LEAKAGE CLAMP TESTER MCL-400IR INSTRUCTION MANUAL Thank you very much for selecting our model MCL-400IR Ior Leakage Clamp Tester. Before use the instrument, read this instruction manual completely and familiarize yourself thoroughly with all functions. Keep this instruction manual carefully to take out whenever you need.

  • Page 2: Safety Summary

    SAFETY SUMMARY observe by all means ● To use this instrument safely, read this "SAFETY SUMMARY" carefully and apply the instrument correctly. ● The CAUTIONs and WARNINGs which appear on the following pages are stated to prevent the operator & other people from the dangers and their properties from the damages beforehand.
  • Page 3 Our newly developed Ior clamp tester does not need the voltage input and can measure Ior values of the grounding line as well as the lines of feeder simply by clamping CT. Model MCL-400IR is the first and epoch-making leakage clamp tester.
  • Page 4 2. PRINCIPLE When the loading apparatus are working, the 3rd, 5th, 7th & 9th harmonics occur in the loading current due to the characteristics of rectification circuit inside of the load and or of magnetic materials. Among these harmonic currents, the 3rd and 9th harmonic currents flow in the secondary windings of delta connected transformer as a circulating current due to the star-delta connection of high &...
  • Page 5 3. SPECIFICATIONS 3-1 GENERAL SPECS 1) CT Part Inside Diameter : 40mm Influence of External Magnetic Field : less than 5mA (nearby 100A conductor) Withstanding Voltage : AC 2200V, 1 minute 2) Measuring Part Measuring Function: AC Line Current, Leakage Current (Io), Resistive Leakage Current (Ior), Harmonics Current (Fundamental, 3rd, 5th, 7th, 11th, 13th, AC Voltage.
  • Page 6 Power Supply : 1.5V ("AAA" size , RD3) x3 or AC Adapter (Option) Power Consumption : Approx. 8mA (Approx.60 hours by continuous use) Operating Circuit Voltage : Less than 500V AC Operating Temperature : 0～40℃, less than 80%RH, without condensation Storage Temperature : -10～60℃, less than 70%RH, without condensation Dimensions &...
  • Page 7 4 . OPERATION 4-1 NAME OF PARTS & EXPLANATION ① Clamp CT : Sensor for detection of current ② Open/Close Lever : By pushing this lever, CT will open. ③ Power On/Off Switch : By press one time, power will be "on" and the displayed value will be Io at the selected range.

  • Page 8: Off Switch

    By press once again, "No.3" mark will be displayed for harmonics current. By pressing one time in order, the display will be become as under: Press Press Press (Fundamental "No.1") (3rd harmonics "No.3") ("No.5") Press Press (Io value) ("No.13") ("No.11") ("No.7") Press Press...

  • Page 9: Operation Procedure

    4-2 OPERATION PROCEDURE ・For the safety use, strictly obey contents of CAUTION & WARNING stated in this manual. ▲ MEASUREMENT OF LINE CURRENT 1) Set the power switch "ON". 2) Set the range switch to the appropriate range to be measured. (Select bigger range than the expected current value to be measured).
  • Page 10 ▲ MEASUREMENT OF RESISTIVE CURRENT (Ior) (At the grounding line) 1) Set the power switch "ON". 2) By "Ior SELECT" switch, set the circuit condition to Single Phase (1φ/Ir) or Three Phase (△/Ir). 3) Set the range switch to the appropriate range to be measured. (Select bigger range than the expected current value).
  • Page 11 MEASUREMENT OF VOLTAGE (500V Range) ▲ 1) Set the power switch "ON". 2) Set the range switch to "500V". 3) Insert the test leads to the terminals of "500V" and "COM". 4) Apply the tips of test leads to the measuring points. 5) Read the displayed value.

  • Page 12: Change Of Batteries

    5 . CHANGE OF BATTERIES △ WARNING It may cause electric shock and hazard ・Do not replace the batteries with clamping CT to the electric conductors or during voltage measurement. ・Do not use the instrument, keeping the battery cover off. △...

  • Page 13: Repair Service

    6. REPAIR SERVICE When requesting for repair service, please bring the instrument directly to the dealer where you bought. When mailing the instrument, always pack it in its original or equivalent. Packing materials to avoid any damage during the transportation and also put together with documents showing your name, address, phone number and defect point.
  • Page 14 POSTSCRIPT This Ior leakage current clamp tester (model MCL-400IR) can detect the insulation deterioration of grounding phase. In case that the (―) mark is lightening on & off during the measurement of resistive leakage current (Ior), the instrument is detecting the insulation deterioration of grounding phase.

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