KYORITSU KEW 5410 RCD Tester | Trip time ×1/2, ×1, ×5, trip current by auto Ramp, IΔn 15–500 mA, IP54

KYORITSU KEW 5410 RCD Tester: Trip Time and Trip Current

Overview

The KEW 5410 is a KYORITSU earth leakage circuit breaker (RCD / ELCB) tester that measures RCD trip time and trip current. The test key can be locked for remote testing, and the test starts automatically when supply voltage is detected. When measuring with EARTH, the test stops if the touch voltage reaches AC 50 V or more to prevent electric shock. Auto Ramp applies only to general-type (G) breakers; time-delayed (S) types cannot be tested.

Key Specifications

• Trip time: ×1/2, ×1 up to 2000 ms; ×5 up to 200 ms (IΔn 15 / 30 / 50 / 100 mA); ±1%rdg±3dgt
• Rated IΔn: ×1/2, ×1: 15 / 30 / 50 / 100 / 200 / 500 mA
• Trip current: Auto Ramp 40–110% IΔn in 5% steps, 15 steps in total
• Rated voltage: 100 V ±10%, 200 V −10 to +32%, 400 V ±10% (50 / 60 Hz)
• Voltage measurement: 80–450 V, ±2%rdg±4dgt
• Standards and protection: IEC 61010-1 CAT III 300 V / CAT II 400 V; IEC 61557-1, 6; IP54
• Power and weight: 8 × AA or DC 12 V; 186 × 167 × 89 mm, approx. 965 g (including batteries); approx. 1200 or more measurements

Applications

• Periodic operation testing of earth leakage breakers in distribution panels.

Specifications per the KYORITSU English-site product page and KEW 5410 catalog (January 2007 edition) (retrieved 2026-10-21).