Kyoritsu Electrical Instruments Works, Ltd. KEW3125A Instruction Manual
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Kyoritsu Electrical Instruments Works, Ltd. KEW3125A Instruction Manual

High voltage insulation resistance tester
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Instruction manual
High voltage insulation resistance tester
KEW3125A/3025A
1.800.561.8187
information@itm.com
www.
.com

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Summary of Contents for Kyoritsu Electrical Instruments Works, Ltd. KEW3125A

  • Page 1 Instruction manual High voltage insulation resistance tester KEW3125A/3025A 1.800.561.8187 information@itm.com www. .com...

  • Page 2: Table Of Contents

    Contents 1. Safety warnings･････････････････････････････････････････ 1 2. Features ･･･････････････････････････････････････････････ 5 3. Specification ･･･････････････････････････････････････････ 6 4. Instrument layout ･･････････････････････････････････････10 4-1 Instrument layout ･･････････････････････････････････10 4-2 LCD display ･･･････････････････････････････････････ 11 4-3 How to remove the Hard case ･･････････････････････12 5. Getting started ････････････････････････････････････････13 5-1 Checking the battery voltage･ ･･･････････････････････13 5-2 Connecting test leads ･･････････････････････････････13 6.

  • Page 3: Safety Warnings

    1．Safety warnings ○ This instrument has been designed, manufactured and tested according to IEC 61010: Safety requirements for Electronic   Measuring apparatus, and delivered in the best condition after passing quality control tests. This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and to maintain it in safe condition.
  • Page 4 # DANGER ● Never make measurements under the circumstances exceeding the designed measurement category and the rated voltage of the instrument and the test leads. ● Do not attempt to make measurements in the presence of flammable gasses. Otherwise, the use of the instrument may cause sparking, which can lead to an explosion.
  • Page 5 # CAUTION ● Before starting a measurement, confirm that the Range switch is at an appropriate position. ● Set the Range switch to“OFF”position after use. Remove the batteries if the instrument is to be stored and will not be in use for a long period. ●...
  • Page 6 ○ Measurement categories (Over-voltage categories) To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as O to CAT I V, and called measurement categories. Higher-numbered categories correspond to electrical environments with greater momentary energy, so a measuring instrument designed for CAT III environments can endure greater momentary energy than one designed for CAT II.

  • Page 7: Features

    2. Features KEW3125A/3025A are high voltage insulation resistance testers with 5-range(3125A)/ 4-range(3025A) for measuring insulation resistance. ● Designed to meet the following safety standards:   IEC 61010-1,-2-030 (CAT III 600V/CAT IV 300V Pollution degree 2)   IEC 61010-031 (Requirements for hand-held probes) ●...

  • Page 8: Specification

    IEC 61010-031 Standard for hand-held probes MODEL7165A(CAT IV 600V) MODEL7264(CAT IV 600V) MODEL7265(CAT IV 600V) * When KEW3125A/3025A and the test lead are combined and used together, whichever is lower category either of them belongs to is applied. IEC 61326-1,-2-2...
  • Page 9 ±5%rdg±3dgt ±20% Voltage monitor for insulation resistance range KEW3125A: 30 - 6000V (resolution 10V): ±10%rdg±20V KEW3025A: 30 - 3000V (resolution 10V): ±10%rdg±20V This monitor is used to check whether electric charges stored on the equipment under test are discharged or not. The voltage value measured and displayed on the LCD is a reference value.
  • Page 10 AC5160V(50/60Hz)/5sec. (Between electrical circuit and enclosure) ●Insulation resistance: 1000MΩ or more/ DC1000V (Between electrical circuit and enclosure) ●Dimension: 177(L)×226(W)×100(D)mm ●Weight: KEW3125A:approx. 1.9kg （battery included), KEW3025A:approx. 1.7kg （battery included) ●Power source: DC12V: LR14(Alkaline battery size C)x 8pcs ̶  8  ̶ 1.800.561.8187 information@itm.com...
  • Page 11 ● Current consumption (representative values at 12V of supply voltage) Range 250V 500V 1000V 2500V 5000V AC/DC Output at 200mA short-circuit 350mA 400mA 500mA 750mA 900mA 3125A When rated /0.25MΩ /0.5MΩ /1MΩ /2.5MΩ /5MΩ current is 250mA 300mA 350mA 500mA 110mA outputted 3025A...

  • Page 12: Instrument Layout ･･････････････････････････････････････10

    4. Instrument layout 4-1 Instrument layout ８ ７ ６ ４ １ ９ ３ ２ ５ １ LCD display ２ Range Switch ３ Test button ４ Back Light button ５ DISP button ６ Line Terminal ７ Earth Terminal ８ Guard Terminal ９...

  • Page 13: Lcd Display

    4-2 LCD display ５ ２ ４ ３ １ ６ ９ ７ ８ １ Insulation resistance ２ Bar graph ３ Voltage monitor ４ Battery mark ５ Voltage warning mark ６ Timer display ７ DAR mark ８ PI mark ９ DAR/PI value 10 DC 11 AC 12 Minus display...

  • Page 14: How To Remove The Hard Case ･･････････････････････12

    4-3 How to remove the Hard case Hold the side surface of the terminal part, and gently pull the unit toward the front. ① Hold the side surface of the terminal part. ② Pull the unit toward the front. ̶  12  ̶ 1.800.561.8187 information@itm.com www.

  • Page 15: Getting Started ････････････････････････････････････････13

    5. Getting started 5-1 Checking the battery voltage (1) Set the Range switch to any position other than “OFF” . (2) When the Battery mark shown at the upper left on the LCD is last one level , the batteries are almost exhausted. Replace the batteries with new ones to perform further measurements.

  • Page 16: Measurement ･･････････････････････････････････････････14

    6. Measurement 6-1 Mains disconnection check (Voltage measurement) # DANGER ● Never make measurements under the circumstances exceeding the designed measurement category and the rated voltage of the instrument and the test leads. ● When testing installations which have large current capacities, such as a power line, be sure to make measurement on the secondary side of the circuit breaker in order to avoid getting an electrical shock.

  • Page 17: Insulation Resistance Measurement ･･････････････････15

    LCD and the audible warning activates if a voltage of 30V or higher is measured.   KEW3125A/3025A don’ t start a test, even the Test button is pressed down, if the measuring voltage is 160V or higher.
  • Page 18 ●It takes time to measure a capacitive load. ● At insulation resistance measurement, positive (+) voltage is outputted from the Earth terminal and negative (-) voltage is outputted from the Line terminal.  Connect the Earth cord to the Earth (ground) terminal.  ...
  • Page 19  (5) This instrument has an auto-discharge function.    With the test leads connected to the circuit under test, release the Test button to discharge capacitances in the circuit after test. Confirm that the indication on the voltage monitor becomes “0V” . # DANGER ●...

  • Page 20: Continuous Measurement ･･････････････････････････18

    Principle of Insulation Resistance Measurement A resistance value can be obtained by applying a certain high voltage to the resistor (insulation resistance) and measuring the flowing current. Resistance value = Voltage / Current (RX = V / I) 6-3 Continuous Measurement Press and turn the Test button clockwise and lock the button to measure insulation resistances continuously.
  • Page 21 Note1: DAR time is selectable: 15 or 30 sec. How to select: 1) Keep the DISP button pressed down and rotate the Range switch to power on KEW3125A/3025A. (DAR mark starts blinking.) 2) Press the DISP button to switch 15 sec and 30 sec displayed at the lower left on the LCD.
  • Page 22 3. How to measure DAR/ PI DAR and PI are automatically measured during a normal continuous measurement of insulation resistances. Set the Range switch to any desired range and measure the test object continuously. - 1 min after a start of continuous measurement: LCD shows DAR value.
  • Page 23 4. Display examples of DAR/ PI values The DAR/PI values are displayed as follows during a measurement. (1) Start of test No DAR/PI value, “---” is displayed. (2) 1 min after the start of test   DAR value is displayed. (3) 10 min after the start of test PI value is displayed.
  • Page 24 (1) End of test (A) Time when a test ends Value measured at the end of test (resistance value) (C) DAR or PI value (2) Results at 15 or 30 sec after a start of test (A) Elapsed time (15 or 30 sec) Value measured 15 or 30 sec after a start of test.

  • Page 25: Voltage Characteristics At Measuring Terminal

    6-5 Voltage characteristics at measuring terminal KEW3125A/3025A Output characteristics 6000 5000V range 5000 4000 3000 2500V range 2000 1000V range 1000 500V range 250V range 1000 1000 MΩ MΩ MΩ MΩ MΩ GΩ GΩ GΩ Insulation resistance 6-6 Use of Guard terminal...

  • Page 26: Backlight Function･ ･････････････････････････････････24

    * It is possible to move out the surface leakage resistance of the insulation and measure only the volume resistance by using the Guard terminal. This is helpful when performing tests in humid air. 6-7 Backlight function This function to facilitate working at dimly illuminated location or at nighttime work.

  • Page 27: Battery Replacement

    7．Battery replacement # DANGER ● Do not open the Battery compartment cover if the surface of the instrument is wet. ● Never open the Battery compartment cover during a measurement. ● To avoid possible electric shock, disconnect the test leads and Power Adaptor from the instrument before replacing batteries.

  • Page 28: Accessories

    8．Accessories 8-1 Metal parts for Line Probe, and replacement # DANGER Attach MODEL8255 to the test leads to use the instrument in CAT II or higher environments. MODEL8254 and 8019 have exposed large metal parts, therefore, they may short circuit the equipment under test and also may damage the equipments under test, cause fire or pose fatal or serious injuries to the users.

  • Page 29: How To Use The Adaptor For Recorder

    8-2 How to use the adaptor for recorder MODEL8302 is an adaptor for a recorder (option) for output current measurement. Connect it as shown in the below figure. Output is DC1mV when current of 1μA is flowing. To shield To recorder or Earth －...

  • Page 30: Line Probe With Alligator Clip(Optional Accessory)

    8-3 Line probe with alligator clip(optional accessory) (1) MODEL7168A Line probe with alligator clip (2) MODEL7253 Long Line probe with alligator clip (15m) ̶  28  ̶ 1.800.561.8187 information@itm.com www. .com...

  • Page 31: Disposing The Product

    9. Disposing the Product Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC This Product complies with the WEEE Directive (2002/96/ EC) marking requirement. The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a “Monitoring and Control...
  • Page 32 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 02-15 92-2189 1.800.561.8187 information@itm.com www. .com...

This manual is also suitable for:

Kew3025a

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