SOUKOU E3-301K 2E・3E Relay Tester (Single-Phase Input) | Three-phase voltage 0–500 V, three-phase current 0–30 A, overcurrent/open-phase/reverse-phase tests

SOUKOU E3-301K 2E・3E Relay Tester: Testing from a Single-Phase Supply

Overview

The E3-301K is a 2E・3E relay tester from Soukou Electric (SOUKOU). 2E/3E relays provide overcurrent, open-phase and reverse-phase protection; this unit can test static 3E relays using only a single-phase AC100V supply. Test details are shown on a graphic LCD, and results can be stored in internal memory and output via RS-232C.

Key Specifications

• Power supply: AC100V ±10 V, 50/60 Hz
• Voltage output: Three-phase 0–125 / 250 / 500 V, 30 VA; output stops on overload
• Current output: Three-phase 0–5 / 15 / 30 A, 270 VA (max. impedance 1 Ω)
• Output accuracy: Voltage: F.S. (500 V) ±1% ±2 dgt; current: F.S. of each range ±1% ±2 dgt
• Timer: 0–999999 ms; ±0.5% rdg ±1 dgt ±15 ms ±Δt
• Tests: Operation and operating time for overcurrent, open-phase (current) and reverse-phase (current, voltage)
• Display and interface: Backlit graphic LCD; test results retained in lithium battery-backed memory; RS-232C
• Dimensions and weight: 250 × 435 × 440 mm, 21.5 kg

Applications

• Periodic testing of 2E/3E relays for motors and other equipment.

Specifications per the Soukou Electric E3-301K product page (retrieved 2026-10-22).