第 2 章 測定方法 2.6.2 キュービクル内の B 種接地工事を測定する キュービクル内に A 種と B 種がある場合、キュービクルの B 種接地工事の接地抵抗を測定できます。 キュービクル内の B 種接地工事の抵抗値の閾値は電力会社に よって決められています。 一般的に数十Ωから100 Ω程度です。 キュービクルは高圧線を引き込むので、通常、A 種接地があり、 この接地抵抗は 5 Ω 程度です。 図のように A 種と B 種間で 2 極法測定すると、測定値は A 種 と B 種の和になりますが、 A 種が B 種に比べて十分小さいので、 B 種接地を測定していることになります。...
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付 • 日本工業規格 JIS C 1302「絶縁抵抗計」の解説には次のよう に記載されています。 定格測定電圧 使用例 25 V/50 V 電話回線用機器、電話回線電路の絶縁測定 100 V 系の低電圧配電路および機器の維持・管理 100 V/125 V 制御機器の絶縁測定 250 V 200 V 系の低圧電路および機器の維持・管理 600 V 以下の低電圧配電路および機器の維持・管理 500 V 600 V 以下の低電圧配電路の竣工時の検査 600 V を超える回路および機器の絶縁測定 1 000 V 常時使用電圧の高い高電圧設備(例えば、高圧ケーブル、高電圧 機器、高電圧を用いる通信機器および電路)の絶縁測定...
Introduction Introduction Thank you for purchasing the HIOKI Model IR4000series ANA- LOG M HiTESTER. To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference. The “instrument” in this manual means IR4011, IR4012, IR4013, IR4014, IR4015, IR4030, IR4031, IR4032, IR4033, IR4041, IR4042 or IR4082.
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*1: IR4082 has -11 only. *2: L9787 Test Lead, L9788-10 Test Lead with Remote Switch and L9788-11 Test Lead Set with Remote Switch are all exclusively designed for the HIOKI IR4000 ANALOG M HiTESTER series. Do not use for any other purpose.
L9788-11 Complete Test Lead. □ C0100 Carryingcase L9787 Test Lead, L9788-10 Test Lead with Remote Switch and L9788-11 Test Lead Set with Remote Switch are all exclusively designed for the HIOKI IR4000 ANALOG M HiTESTER series. Do not use for any other purpose.
Safety Information Safety Information This instrument is designed to comply with IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, mishandling during use could result in injury or death, as well as damage to the instrument.
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Safety Information The following symbols in this manual indicate the relative impor- tance of cautions and warnings. Indicates that incorrect operation presents an extreme hazard that could result in serious in- jury or death to the user. Indicates that incorrect operation presents a significant hazard that could result in serious injury or death to the user.
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Safety Information Measurement categories This instrument complies with CAT III safety requirements. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical envi- ronments, categorized as CAT II to CAT IV, and called measure- ment categories. CAT II: Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.)
Before using the instrument the first time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you find any damage, contact your dealer or Hioki representative. To prevent an electric shock accident, confirm that the white or red portion (insulation layer) inside the cable is not exposed.
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Operating Precautions Setting up the Instrument Operating temperature and humidity/Accuracy guarantee for temperature and humidity. ( p.29) Avoid the following locations that could cause an accident or damage to the instrument. In the presence of Exposed to direct corrosive or explosive sunlight gases Exposed to high...
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Operating Precautions • The maximum rated voltage between input terminals and ground is 600 V AC (150 V AC for model IR4030). Attempting to measure voltages exceeding 600V AC (150 VAC for model IR4030) with respect to ground could damage the instrument and result in personal injury.
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Operating Precautions • This instrument is designed for use indoors. It can be oper- ated at temperatures between 0 and 50°C without degrading safety. • For safety reasons, when taking measurements, only use the L9787, L9788-11 or optional test lead provided with the instru- ment.
Chapter 1 Overview Chapter 1 Overview 1.1 Names and Functions of Parts Front *This figure is model IR4042. LINE terminal EARTH terminal MEASURE key Connect the Connect the black Press to measure red test lead test lead insulation resistance Terminals (on top) Terminals Insulation...
Chapter 1 Overview 1.2 Using a Carrying Case Undo the snap fastener on OPEN mark side. Lift the cover and pivot it to the side and under the case itself and redo the snap fastener on the side of the cover. Fasten the strap as shown below.
Chapter 2 Measurement Procedures Measurement Chapter 2 Procedures When the function selector is at the position other than OFF or V and even with the effective battery range indicator OFF, if you press the MEASURE key, the volt- age will be output. Be careful of electric shock. 2.1 Preparing for Measurement Insert the batteries.
Chapter 2 Measurement Procedures 2.2 Pre-measurement inspection Confirming the battery power. Set the function selector away from OFF and confirm the effective battery range indicator. Battery power is high when a green light is shown. Battery power is low when a red light is shown and replacement is recommended.
Chapter 2 Measurement Procedures 2.3 Using the L9788-10 Test Lead with Remote Switch The Insulation Resistance Tester’s MEASURE key will still be available even when this test lead is connected to the Insulation Resistance Tester. When connected to the Insulation Resistance Tester, take note that a test voltage will be discharged even when the MEASURE key of the Tester is pressed.
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Chapter 2 Measurement Procedures Confirm that the power of the Insulation Resistance Tester is turned off. Plug the test lead securely into the LINE terminal of the Insulation Resistance Tester. Before Starting (Before using the test leads, be sure to conduct the following safety checks.) a.
Chapter 2 Measurement Procedures 2.4 Insulation Resistance Measurement The instrument is used to measure insulation resistance in the electric circuit or in the appliance in order to inspect the degree of electrical insulation. When measuring insulation resistance, you have to select the voltage applied to the object to be measured. Observe the following to avoid electric shock, short cir- cuits and damage to the instrument: •...
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Chapter 2 Measurement Procedures Measurement Method Always turn off the breaker of the measurement line. Source (primary side) Load (secondary side) Ex. When measuring the insulation resistance between circuit and ground For the IR4011 to 4015, set the function selector to For the IR4030 to 4042 and IR4082, set the function selector to any of the test voltages.
Chapter 2 Measurement Procedures Discharging Function When measuring an insulation resistance that contains a capac- itance element, a charge proportional to the measurement volt- age accumulates, and if undischarged could lead to an electric shock accident. Without removing the test leads from the item being mea- sured, release the MEASURE key.
Chapter 2 Measurement Procedures Earth Resistance Measurement (Function of IR4082) In the AC resistance range of IR4082, the earth resistance of the ground electrode (D type earthing work) can be measured using the simple measurement method (bipolar method). What is the simple measurement method (bipolar method)? The simple measurement method is a method used to obtain the earth resistance by making use of the existing low earth resistor as an auxiliary electrode when the additional earth...
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Chapter 2 Measurement Procedures • When the instrument is connected to the Line-Earth section of the live conductor with the MEASURE key pressed down, the leakage breaker will be triggered and the power supply will be cut off. Do not connect the instrument to the Line-Earth sec- tion.
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Chapter 2 Measurement Procedures Connect the red line lead to the neutral side of the breaker. Confirm that the indicator needle indicates the range of "Earth Voltage OK"of the meter. Set the Function selector to either x1, or x10. Press the Measure key. Pull it up for continuous measure- ments.
Chapter 2 Measurement Procedures 2.7 Voltage Measurement This instrument can measure the AC of commercial power. It is also useful to make sure the subject conductor is not live before measuring insulation resistance. • Test leads should only be connected to the secondary side of a breaker, so the breaker can prevent an acci- dent if a short circuit occurs.
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Chapter 2 Measurement Procedures Source Caution: (primary side) EARTH Do not press the MEASURE key. LINE Load (secondary side) Always connect the test lead to the secondary side of the breaker. Ex. When measuring the voltage between circuit and ground Use the function selector to select the V function.
Chapter 2 Measurement Procedures 2.8 Auto power save (power-saving function) To avoid battery depletion, turn the MEASURE key OFF after use (the Auto Power Save feature con- sumes a small amount of current). When the function selector is not at OFF, the power save func- tion automatically kicks in 15 minutes after the last time the MEASURE key is pressed and the effective battery range indica- tor goes off.
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Chapter 3 Specifications Chapter 3 Specifications Standard Specifications Insulation Resistance measurement: DC voltage supply, current detection AC Voltage measurement: Average responding type Functions AC resistance measurement (IR4082 only) Measurement principle, constant AC supply, volt- age detection (synchronous detection), effective resistance value indication (can be used in earth resistance measurement by bipolar method) When 20 VAC or higher exists between LINE termi- Live circuit indica-...
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Chapter 3 Specifications General Specifications Guaranteed 1 year accuracy period Operating Indoors, Pollution Degree 2 Environment Altitude up to 2000 m (6562-ft.) 0 to 40C (32 - 104F) Operating 90%RH or lower (non-condensating) Temperature & 40 to 50C (104 - 122F), at 50C and below relative Humidity with linear decrease up to 50%RH Storage Tempera-...
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Chapter 3 Specifications Accessories IR4011, IR4012,IR4013, IR4014, IR4015, IR4030, Name IR4031, IR4032, IR4033, IR4041, IR4042, IR4082* Model ‐ 11 Version L9788-11 Complete Test L9787 Test Lead×1 Leads with Remote Control Switch ×1 C0100 Carrying case ×1 Accessories Instruction manual ×1 LR6 alkaline battery ×...
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Chapter 3 Specifications • Open circuit voltage 1 to 1.2 times of rated output voltage. (when no load is applied) • Rated current (DC) 1 mA (The current flow when rated output voltage is maintained.) 1 to 1.2 times of rated output current. •...
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Chapter 3 Specifications Insulation Resistance Measurement Specifications of Each Model Model IR4041 Rated measurement 50 V 125 V 250 V 500 V voltage (DC) Maximum effective 100 M indicated value Center scale value 2 M 1st effective 0.1 M to 50 M measuring range 2nd effective 0.01 M...
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Chapter 3 Specifications Model IR4030 Rated measurement 25 V 50 V 125 V voltage (DC) Maximum effective 20 M indicated value Center scale value 0.5 M 1st effective 0.02 M to 10 M measuring range 2nd effective 0.005 M to 0.02 M measuring range 10 M...
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Chapter 3 Specifications Model IR4032 Rated measurement 125 V 250 V 500 V voltage (DC) Maximum effective 100 M indicated value Center scale value 2 M 1st effective 0.1 M to 50 M measuring range 2nd effective 0.01 M to 0.1 M measuring range 50 M...
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Chapter 3 Specifications Model IR4011, IR4012, IR4013, IR4014, IR4015 Rated measurement 125 V 250 V 500 V 500 V 1000 V voltage (DC) Maximum effective 100 M 1000 M 2000 M indicated value Center scale value 2 M 20 M 50 M...
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Chapter 3 Specifications IR4082 Model Insulation Resistance measurement Rated measurement 125 V 250 V 500 V voltage (DC) Maximum effective 100 M indicated value Center scale value 2 M 1st effective 0.1 M to 50 M measuring range 0.01 M to 0.1 M 2nd effective measuring range 50 M...
Service 4.1 Troubleshooting • If the instrument seems to be malfunctioning, contact your dealer or Hioki representative. • Pack the instrument so that it will not sustain damage during shipping, and include a description of existing damage. We do not take any responsibility for damage incurred during ship- ping.
Chapter 4 Maintenance and Service 4.2 Replacing Batteries • To avoid electric shock, turn off the function selector and disconnect the test leads before removing the lith- ium battery. • After replacing the batteries, replace the cover before using the instrument. •...
The pin at the front of the Model L9788-10 (option) can be replaced when it has worn away or is damaged. Replacement pins are available at any Hioki dealer. (Model L9788-90 Tip Pin) Turn off the power of the Insulation Resistance Tester and disconnect the test leads.
Chapter 4 Maintenance and Service 4.4 Cleaning To clean the instrument, wipe it gently with a soft cloth moist- ened with water or mild detergent. Never use solvents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.
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