UNI-T UT586+ Three-Phase RCD & Loop Impedance Tester

UNI-T UT586+ Three-Phase RCD & Loop Impedance Tester in Sri Lanka

Single and Three-Phase RCD Trip Time Tester with Loop Impedance Measurement

The UNI-T UT586+ Three-Phase RCD and Loop Impedance Tester is a powerful, dual-purpose instrument capable of testing both single-phase and three-phase residual current devices with rated currents up to 1000mA. It combines precise RCD trip time measurement, auto-ramp current testing, and loop impedance measurement into a single rugged handheld unit — making it the ideal tool for industrial electricians and panel builders working on complex three-phase distribution systems in Sri Lanka.

Discover our complete selection of Digital RCD Testers — portable, single-phase, and three-phase models available in Sri Lanka!

Equipped with phase sequence detection and high-voltage loop impedance testing up to 440V AC, the UT586+ handles the full spectrum of industrial switchboard commissioning, periodic inspection, and fault diagnosis tasks that go beyond the capability of basic single-phase RCD testers.

Technical Specifications

Rated Current Range: 10mA, 30mA, 100mA, 300mA, 500mA, 1000mA

Phase Support: Single-phase and Three-phase

Test Type: Trip time (x½, x1, x5), Ramp test, Loop impedance

Phase Angle: 0°, 90°, 135°, 180°

Loop Impedance Range: 0.00Ω–1999Ω

Supply Voltage: 100V–440V AC, 50/60Hz

RCD Type Support: Type AC, Type A

Phase Sequence: L1-L2-L3 detection

Safety Rating: CAT III 600V

Key Features

Three-Phase Capability: Tests three-phase RCDs and ELCB panels in industrial installations

Loop Impedance Measurement: Measures earth fault loop impedance and calculates prospective fault current

Extended Current Range: Covers up to 1000mA for heavy-duty industrial RCD devices

Multi-Angle Phase Testing: 0°, 90°, 135°, and 180° phase angles for thorough device characterization

Phase Sequence Detection: Identifies L1-L2-L3 rotation for motor and drive protection verification

Type A RCD Support: Tests pulsating DC-sensitive Type A residual current devices

CAT III 600V Rated: Safe for use on industrial switchgear and distribution panels

Applications

Commissioning and periodic inspection of industrial three-phase distribution boards

Loop impedance measurement on factory floor power circuits

Phase sequence verification during motor drive panel installation

Testing Type A RCDs protecting variable-speed drives and EV chargers

High-current industrial ELCB and RCCB trip time compliance testing

Package Includes

1 x UNI-T UT586+ Three-Phase RCD & Loop Impedance Tester

Test leads with safety probes

Alligator clips

Battery (installed)

English user manual

Carrying case

For comprehensive electrical installation testing that also covers insulation resistance, continuity, and voltage measurement in a single instrument, consider the UNI-T UT593 Multifunction Installation Tester.

Downloads

📄 Download UNI-T UT586+ Data Sheet
📄 Download UNI-T UT586+ User Manual