UNI-T UT526 Multifunction Earth Fault Loop Impedance Tester

UNI-T UT526 Multifunction Earth Fault Loop Impedance Tester in Sri Lanka

All-in-One Loop Impedance, RCD, Insulation Resistance, and Earth Continuity Tester

The UNI-T UT526 Multifunction Earth Fault Loop Impedance Tester is a comprehensive electrical installation tester that combines earth fault loop impedance measurement, RCD/ELCB trip time and trip current testing, insulation resistance testing, earth continuity verification, and AC/DC voltage measurement in a single handheld instrument. It is the ideal professional tool for licensed electricians and electrical inspectors in Sri Lanka who carry out full electrical installation testing and compliance verification to IEC and local safety standards.

Explore our complete range of Earth Resistance Testers — digital earth testers, ground resistance meters, and loop impedance instruments in Sri Lanka!

Equipped with a non-trip loop impedance test mode that does not trigger RCDs during measurement, the UT526 enables loop impedance testing on live installations without disrupting connected loads — a critical feature for occupied buildings, data centres, and industrial facilities where circuit interruption is unacceptable.

Technical Specifications

Loop Impedance (Zs / Ze): 0.01Ω~1999Ω | Resolution: 0.01Ω | Accuracy: ±(3%+5dgts)

Prospective Short Circuit Current (PSCC): 0.1A~99.9kA

RCD Trip Time: 0~999ms (at IΔn, ½IΔn, 2IΔn, 5IΔn) for 10mA, 30mA, 100mA, 300mA, 500mA types

RCD Trip Current: 0~999mA ramp test

Insulation Resistance: 0~200MΩ at 100V / 250V / 500V / 1000V DC

Earth Continuity / Bond Resistance: 0.01Ω~400Ω | Test Current: ≥200mA

AC Voltage: 0~600V | DC Voltage: 0~600V

Non-Trip Loop Test: Supported (no RCD tripping)

Power: Rechargeable Li-ion battery pack

Key Features

Non-Trip Loop Impedance Test: Measures Zs and Ze on RCD-protected circuits without tripping the RCD — essential for live installation testing

Comprehensive RCD Testing: Tests trip time and ramp trip current for all standard RCD/ELCB types including 10mA, 30mA, 100mA, 300mA, and 500mA

Multi-Voltage Insulation Resistance: Selectable 100V, 250V, 500V, and 1000V DC test voltages for full insulation assessment compliance

High-Current Earth Continuity: Tests protective conductor and earth bonding continuity at ≥200mA — meets PAT testing and bonding inspection requirements

PSCC Calculation: Automatically calculates prospective short-circuit current from loop impedance readings

Backlit Colour Display: Clear pass/fail indication with graphical interface for rapid on-site result interpretation

Applications

Earth fault loop impedance testing (Zs and Ze) for new electrical installation commissioning

RCD/ELCB trip time and trip current verification for periodic inspection reports

Insulation resistance testing for wiring, motors, and switchgear

Earth continuity and protective bonding resistance checks in commercial and industrial buildings

PAT testing earth bond verification for portable appliances

ELCB polarity and earth leakage circuit breaker performance validation

Package Includes

1 × UNI-T UT526 Multifunction Earth Fault Loop Impedance Tester

Test lead set with probe and crocodile clips

RCD test lead with IEC socket adapter

Rechargeable battery pack and USB charging cable

Carry case

English user manual

If your application requires advanced auto-sequence testing with interface-check automation, consider the UNI-T UT572 Advanced Earth Ground Tester with enhanced interference detection and automated measurement routines.

Downloads

📄 Download UNI-T UT526 Data Sheet
📄 Download UNI-T UT526 User Manual