5KV Battery Operated Digital Insulation Resistance

Motwane has been offering a comprehensive and varied range of products designed in-house to cater to multiple segments of the power and energy sector. Digital Insulation tester (Model: IT-250G spot) is a microcontroller based battery operated insulation tester for measuring insulation in all types of electrical equipment.

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    Motwane has been offering a comprehensive and varied range of products designed in-house to cater to multiple segments of the power and energy sector. Digital Insulation tester (Model: IT-250G spot) is a microcontroller based battery operated insulation tester for measuring insulation in all types of electrical equipment. IT-250G has a digital and analog bar graph display designed for high voltage insulation resistance which is used for testing in the maintenance and servicing of cables, electric motors, transformers, switchgear, and industrial installations. DC insulation tests are performed at 250V, 500V, 1000V, 2500V, and 5000V. Insulation resistance measuring range is 1K Ohm to 250G Ohm. It’s auto power-off facility enhances battery life and the pleasant amber backlight allows the user to work in a dusky environment. 

    IT-250G is ideally suited for insulation resistance testing during erection, commissioning or installation at electrical substations, preventive operation, maintenance, and servicing of cables or transformers at industrial installations. Equipped with a robust ABS body, the device comes with a rugged strap that allows easy handling during transit and testing at outdoor sites. The guard terminal features minimal effects of surface leakages and gives an error-free measurement. Loaded with multiple propositions, IT250G becomes the ideal choice for routine insulation tests done by service providers. It also has a continuity range for continuity measurement. It automatically discharges and the decaying discharge voltage is displayed on the screen.


    The Insulation Resistance test is an essential test that helps to check the condition of electrical insulations. The insulation resistance quality of an electrical system degrades with time and with environmental conditions like temperature, humidity, moisture, and dust particles. The device is designed for routine and diagnostic testing like IR, PI of high voltage electrical apparatus including electrical rotating machinery, transformers, HV & LV switchgear, cables, insulators, etc.


    • Selectable test voltage: 250V, 500V, 1000V, 2500V, 5000V DC
    • Insulation resistance measurement up to 250GΩ 
    • Short circuit current < 1.4 mA. approx 
    • Programmable timer from 1 sec to 99 minutes 
    • Internal memory storage of 1000 readings
    • Auto power off to save battery 
    • Auto calibration at every start up
    • Continuity testing at 100mA approx 
    • GUARD terminal to eliminate surface leakages
    • Battery status indicator
    • Safety/EMC CE CAT III (1000V)/ CAT IV (600V), IP54
    • Shockproof, heavy duty & shrouded test leads 
    • Inbuilt digital filter

    Terminal Voltage 

    Test Voltage : 250V, 500V, 1000V, 2500V, 5000V 
    Test Voltage Accuracy : ± 10 %  +5 digit 
    Short circuit current : <1.4 mA  (± 0.5 mA ) approx.
    Overload Protection : 230V DC/AC RMS for 30 secs

    Insulation Resistance 

    Analog Display : 1 KΩ to 250GΩ

    Test Voltage Max. Insulation Resistance Accuracy ± (% reading + Digit)
    250V 12.5 GΩ ± (5% + 5)
    500V 25 GΩ
    1000V 50 GΩ
    2500V 125 GΩ
    5000V 250 GΩ

    Note: ‐ 1. Test Voltage accuracy ± (10% + 5) is when tested by using 1000MΩ impedance probe Motwane make HV 30/HV 40 or equivalent


    Range Accuracy Overload Protection
    0 – 200Ω ± (3% + 10) 230V DC/AC RMS for 30 sec
    Buzzer will sound < 20Ω approx.
    Open circuit voltage on continuity range is 8V approx.
    Short circuit current is 100mA approx. on Continuity range w.r.t GUARD / COM terminal. (battery should be in full charged condition)

    General Specification

    Insulation Resistance measurement : Digital & Analog (Bar Graph) indication. 
    Display : LCD display with a backlight ( 90 X 60mm) 
    Dimensions (L X W X H) : 230 mm X 165 mm X 95 mm approx. 
    Weight : 1.5 Kg approx. (without accessories) 
    Default Test on time : 30 sec. 
    Selectable test time : 1 sec. to 99 minutes. 
    HV ON Indication : Visual & Audible. 
    Data Storage functions : 1000 readings. 
    Data Recall function. 
    Auto discharge facility after every test

    Environmental Specifications 

    Operating Temperature : -00C to 550
    Storage Temp : -200 C to 600
    Humidity : 90% RH at 00 C to 400 C max. (non condensing). 
                   70% RH at 400 C to 500 C max. (non condensing).


    Power Supply : 8 X 1.5V AA size Alkaline batteries (IEC LR6 ) 
    Power Consumption : 40mA approx. 
    Battery status Indication : YES. 
    Auto Power Off : After 15 min. 
    Idle sleep mode consumption 400µA approx. (When not in use always keep the rotary switch at OFF position & remove the batteries from the battery compartment to save the battery life)
    Safety and Standards (CE Certifications)
    Measurement Category : CAT IV (600V) Reinforced insulation 
    Safety : EN 61010‐1 
    EMC : EN 61326-1
    IP rating : IP 54 


    • Accuracy is specified as ± (% of reading + digits) and is valid at 25°C ± 3°C, 55% RH ±10%. 
    • Accuracy is valid from 10% of the range to 95% of the range. 
    • Temp. Coefficient = (0.2% X Specified accuracy) per degree centigrade referred to 25°C. 
    • Accuracy is not valid if the battery status indicator symbol blinks on display. In this case, immediately replace the batteries. 
    • It is recommended that calibration equipment to verify the instrument’s accuracy should be 10 times more accurate. 
    • It is recommended to recalibrate the instrument once a year. 

    Standard Accessories Included 

    • Test Lead set (3 meters long shrouded banana with crocodile clip) 
      Red lead for +ve terminal : 1 No. 
      Black lead for ‐ve terminal : 1 No. 
      Green lead for GUARD terminal: 1 No.
    • Instruction manual : 1 No. 
    • Calibration certificate : 1 No.
    • Carry  bag : 1 No.  

    Optional Accessories

    • Test Lead set (10 meters. Long shrouded banana with crocodile clip)
      Red lead for +ve terminal : 1 No. 
      Black lead for ‐ve terminal : 1 No. 
      Green lead for GUARD terminal : 1 No. 
    • Test lead set 1 meter long with one end pointed tip & another with 4mm shrouded banana. (For continuity Range)

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    Motwane’s customer base is a testament to its ongoing ability to provide reliable, accurate, and long-lasting products, resulting in enduring relationships that are based on mutual satisfaction, loyalty, and trust.

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    Motwane products are highly reliable, built with great quality, and deliver accurate results.  We at BSES Rajdhani Power have been using Motwane products for many years, and continue to do so.

    Shailendra Saxena

    Additional VP Protection BSES Rajdhani Power Ltd.

    Motwane is the oldest and the most trusted company in electrical testing products and solutions also. Motwane is known for reliable and rugged products also, we have procured from them. And our organization has been using these products and have found them satisfactory in performance and services also.

    Mr. Shrikant S Rajurkar

    Director Technical MSETCL

    By using the MOT-WARE software, all equipment testing difficulties have been removed, leading to increased efficiency and happy clients.

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    Managing Director JBS Enterprises Pvt. Ltd.

    Motwane offers great products! The company fullfills our demands, and supplies reliable products for our Power, Oil & Gas, and other industry projects.  

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    FAWAZ Trading & Engineering Services Co. W.L.L.

    MOTWANE is reputed brand since many years & we prefer it for all our International Projects

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    DGM- India Operations MBH Power Pvt. Ltd.

    We are very satisfied on Motwane’s oil testing products to test electrical properties of Insulation Oil


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    AGM Projects Tata Projects Ltd.

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    Head Projects IBMS SPG, Sterling and Wilson

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