Hioki IR4057-50 1000V Insulation Tester

Name: Hioki IR4057-50 1000V Insulation Tester | Stock in UAE
Brand: Hioki
SKU: 1131
Rating: 5 (2 reviews)

Description

What Is the Hioki IR4057-50 and Exactly What Is It Used For?

The Hioki IR4057-50 is a high-speed, 5-range digital insulation resistance tester (megohmmeter) generating test voltages from 50 V to 1000 V with measurements up to 4000 MΩ. It is engineered specifically for testing motor windings, solar PV panels, secondary power distribution networks, and low-to-medium voltage panels in commercial and industrial infrastructure across the UAE and GCC. Equipped with a sub-second 0.3-second comparator response, a high-response dynamic bar graph, and a 200 mA continuity check, it instantly verifies electrical integrity, ground bonding, and dielectric breakdown under harsh, high-temperature substation conditions.

Key Engineering Factors to Evaluate Before Selecting an Insulation Tester

When selecting a field-grade megohmmeter for commercial utilities and contractor sign-offs (such as DEWA, SEWA, or ADNOC installations), evaluate these core technical benchmarks. If you are comparing different brands and models, we recommend reviewing our expert guide: How to Choose the Best Insulation Tester to ensure you select the right device for your specific project environment.

Test Voltage Breadth vs. Sensitive Electronics: 1-range or 2-range testers risk destroying sensitive telecommunications or control gear. The IR4057-50 offers 5 distinct ranges (50V, 125V, 250V, 500V, 1000V), protecting low-voltage circuits while testing 1000V distribution feeders.
Comparator Speed & Display Response: Analog meters require settling time; the IR4057-50 delivers immediate red/green PASS/FAIL backlighting and numerical lock within 0.3 seconds.
Ground Continuity Current: Standard multimeters test with a few microamps, failing to verify protective conductors. This unit injects a dedicated ≥200 mA testing current compliant with IEC 60364 verification.
Data Traceability: Manual logging creates reporting overhead and human error during auditing. With the optional Z3210 Bluetooth adapter, readings transfer directly into Excel spreadsheets.

What’s Included in the Hioki IR4057-50 Package?

Every standard factory-sealed Hioki IR4057-50 unit ships ready for field commissioning with the following original accessories:

1x Hioki IR4057-50 5-Range Digital Insulation Resistance Tester
1x Test Lead Set L4930: High-durability modular lead wire system
1x Alligator Clip Set L4935: Heavy-duty ground and terminal grip attachments
1x Test Pin Set L4938: Precision probe tips for compact breaker terminals
1x Heavy-Duty Neck Strap: Ergonomic hands-free lanyard for ladder and panel work
4x Alkaline AA Batteries (LR6): Providing over 20 hours / 1,000 standard operations
1x Official Instruction Manual: Complete technical reference and calibration certificates

Note: The Hioki Z3210 Wireless Bluetooth Adapter and Remote Switch Probe (L9788-11) are sold as optional performance add-ons.

Engineering Verdict: Hioki IR4057-50 Field Evaluation & GCC Limitations

Where It Excels: The IR4057-50 outperforms standard handhelds in testing speed. For electrical contractors commissioning hundreds of circuits a day in UAE distribution boards, the 0.3-second comparator audible tone and bright red display reduce inspection times by more than 40%. The semi-transmissive FSTN LCD with active analog-style bar-graph is readable in direct sunlight, and its 1-meter drop-proof rating onto concrete ensures longevity in harsh job site conditions.

Candid Engineering Limitation: The IR4057-50 is engineered for low-voltage systems up to CAT III 600 V with a maximum test voltage of 1000 V (4000 MΩ). It does not perform high-voltage diagnostics such as Polarization Index (PI) or Dielectric Absorption Ratio (DAR) step-voltage ramps, nor is it rated for 5 kV / 10 kV medium-voltage transmission cable diagnostics. For utility-grade high-voltage transformers and cables, an instrument such as the Megger MIT515 or Hioki IR3455 is required.

Budget Analysis & Total Cost of Ownership (TCO)

The Hioki IR4057-50 sits in the professional mid-to-high tier segment of 1000V insulation testers. While basic unbranded or entry-level analog testers have a lower upfront cost, they lack safety overload protection (up to 660 V AC) and high-speed multi-range voltage selection. The IR4057-50 eliminates recurring lead replacement costs through its modular L4930 tip system and saves substantial labor hours via fast acoustic PASS/FAIL checks and direct digital reporting.

Technical Benchmark Matrix: Hioki IR4057-50 vs. Key Alternatives

Technical Feature	Hioki IR4057-50	Hioki IR4056-20	Fluke 1507
Test Voltages	50V, 125V, 250V, 500V, 1000V	50V, 125V, 250V, 500V, 1000V	50V, 100V, 250V, 500V, 1000V
Max Insulation Resistance	4000 MΩ (4 GΩ)	4000 MΩ (4 GΩ)	10000 MΩ (10 GΩ)
Response Time	Approx. 0.3 s (High-Speed)	Approx. 0.8 s	Standard Digital Delay
Display Type	FSTN LCD with Dynamic Bar Graph	Standard Digital Segmented LCD	Standard Backlit Digital LCD
Continuity Testing	200 mA (≥3 ranges, up to 1000 Ω)	200 mA (≥3 ranges, up to 1000 Ω)	200 mA (≥1 range, up to 20 Ω)
Wireless Connectivity	Yes (Optional Z3210 Adapter)	No	No (Requires Fluke Connect models)
Safety Rating	CAT III 600 V	CAT III 600 V	CAT IV 600 V / CAT III 1000 V

Is the Hioki IR4057-50 accepted for DEWA, SEWA, and regional GCC inspections?

Yes. The Hioki IR4057-50 complies fully with IEC 61557-1/-2/-4 standards, meets CAT III 600 V electrical safety criteria, and delivers an authentic 200 mA short-circuit continuity test current as required by regional municipal authorities and MEP installation codes.

What is the exact difference between the IR4057-50 and the IR4056-20

While both instruments share the same 5 test voltage levels and 4000 MΩ measurement limits, the IR4057-50 features an ultra-responsive dynamic bar-graph display, a 0.3-second fast comparator response (compared to 0.8s on the IR4056-20), and full hardware compatibility with the Hioki Z3210 Bluetooth communication adapter.

Can I receive this tester with an ISO 17025 accredited calibration certificate in the UAE

Yes. In addition to the standard factory calibration certificate included in the box, authorized regional distributors supply full ISO/IEC 17025 accredited calibration certificates through local accredited metrology laboratories upon request during procurement.

Does the tester shut down or display false readings in extreme UAE summer heat (50°C)

No. The Hioki IR4057-50 is engineered for operating temperatures ranging from 0°C to 40°C guaranteed accuracy, with an expanded functional operating range up to 50°C (80% RH non-condensing), preventing field drift and thermal shutdown during outdoor panel inspections.

Can this unit calculate Polarization Index (PI) and Dielectric Absorption Ratio (DAR)

No. The IR4057-50 is engineered for rapid pass/fail insulation resistance checks. For automated PI/DAR calculations on large inductive assets or high-voltage switchgear, choose an advanced insulation analyzer such as the Hioki IR3455.

Specifications

Specification	Details
Test voltages	50, 125, 250, 500, 1000 V DC (5 ranges); 50 V/100 MΩ to 1000 V/4000 MΩ
Effective maximum indicated value (250 V DC)	500 MΩ; accuracy ±2% rdg.
Response time	0.3 seconds
Comparator	PASS/FAIL judgment
DC voltage range	4.2 V to 600 V, 4 ranges; accuracy ±1.3% rdg.
AC voltage range	420 V, 2 ranges; accuracy ±2.3% rdg.
Wireless	Bluetooth® via optional Z3210 adapter
Durability	Drop-proof up to 1 m
Power supply	AA alkaline (LR6) batteries ×4
Dimensions	159 (W) × 177 (H) × 53 (D) mm
Mass	Approx. 600 g

Datasheet

Download datasheetPDF

Reviews (2)

Rated 5 out of 5

2 reviews

Rated 5 out of 5

Rated 4 out of 5

Rated 3 out of 5

Rated 2 out of 5

Rated 1 out of 5

2 reviews for Hioki IR4057-50 Insulation Tester

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Cynthia – June 26, 2022

Rated 5 out of 5
They are really easy to work with.

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mick – October 16, 2025

Rated 5 out of 5
The Ir4057-50 by Hioki offers exceptional reliability and power in insulation testing, making it a must-have for professionals.

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